source: MondoRescue/branches/3.2/mindi-busybox/include/libbb.h@ 3232

Last change on this file since 3232 was 3232, checked in by Bruno Cornec, 10 years ago
  • Update mindi-busybox to 1.21.1
File size: 72.5 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Busybox main internal header file
4 *
5 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
6 * Permission has been granted to redistribute this code under GPL.
7 *
8 * Licensed under GPLv2, see file LICENSE in this source tree.
9 */
10#ifndef LIBBB_H
11#define LIBBB_H 1
12
13#include "platform.h"
14
15#include <ctype.h>
16#include <dirent.h>
17#include <errno.h>
18#include <fcntl.h>
19#include <inttypes.h>
20#include <netdb.h>
21#include <setjmp.h>
22#include <signal.h>
23#if defined __UCLIBC__ /* TODO: and glibc? */
24/* use inlined versions of these: */
25# define sigfillset(s) __sigfillset(s)
26# define sigemptyset(s) __sigemptyset(s)
27# define sigisemptyset(s) __sigisemptyset(s)
28#endif
29#include <stdint.h>
30#include <stdio.h>
31#include <stdlib.h>
32#include <stdarg.h>
33#include <stddef.h>
34#include <string.h>
35/* There are two incompatible basename's, let not use them! */
36/* See the dirname/basename man page for details */
37#include <libgen.h> /* dirname,basename */
38#undef basename
39#define basename dont_use_basename
40#include <sys/poll.h>
41#include <sys/ioctl.h>
42#include <sys/mman.h>
43#include <sys/socket.h>
44#include <sys/stat.h>
45#include <sys/time.h>
46#include <sys/types.h>
47#ifndef major
48# include <sys/sysmacros.h>
49#endif
50#include <sys/wait.h>
51#include <termios.h>
52#include <time.h>
53#include <sys/param.h>
54#include <pwd.h>
55#include <grp.h>
56#if ENABLE_FEATURE_SHADOWPASSWDS
57# if !ENABLE_USE_BB_SHADOW
58/* If using busybox's shadow implementation, do not include the shadow.h
59 * header as the toolchain may not provide it at all.
60 */
61# include <shadow.h>
62# endif
63#endif
64#if defined(ANDROID) || defined(__ANDROID__)
65# define endpwent() ((void)0)
66# define endgrent() ((void)0)
67#endif
68#ifdef HAVE_MNTENT_H
69# include <mntent.h>
70#endif
71#ifdef HAVE_SYS_STATFS_H
72# include <sys/statfs.h>
73#endif
74/* Don't do this here:
75 * #include <sys/sysinfo.h>
76 * Some linux/ includes pull in conflicting definition
77 * of struct sysinfo (only in some toolchanins), which breaks build.
78 * Include sys/sysinfo.h only in those files which need it.
79 */
80#if ENABLE_SELINUX
81# include <selinux/selinux.h>
82# include <selinux/context.h>
83# include <selinux/flask.h>
84# include <selinux/av_permissions.h>
85#endif
86#if ENABLE_FEATURE_UTMP
87# include <utmp.h>
88#endif
89#if ENABLE_LOCALE_SUPPORT
90# include <locale.h>
91#else
92# define setlocale(x,y) ((void)0)
93#endif
94#ifdef DMALLOC
95# include <dmalloc.h>
96#endif
97/* Just in case libc doesn't define some of these... */
98#ifndef _PATH_PASSWD
99#define _PATH_PASSWD "/etc/passwd"
100#endif
101#ifndef _PATH_GROUP
102#define _PATH_GROUP "/etc/group"
103#endif
104#ifndef _PATH_SHADOW
105#define _PATH_SHADOW "/etc/shadow"
106#endif
107#ifndef _PATH_GSHADOW
108#define _PATH_GSHADOW "/etc/gshadow"
109#endif
110#if defined __FreeBSD__ || defined __OpenBSD__
111# include <netinet/in.h>
112# include <arpa/inet.h>
113#elif defined __APPLE__
114# include <netinet/in.h>
115#else
116# include <arpa/inet.h>
117# if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
118/* We #define socklen_t *after* includes, otherwise we get
119 * typedef redefinition errors from system headers
120 * (in case "is it defined already" detection above failed)
121 */
122# define socklen_t bb_socklen_t
123 typedef unsigned socklen_t;
124# endif
125#endif
126#ifndef HAVE_CLEARENV
127# define clearenv() do { if (environ) environ[0] = NULL; } while (0)
128#endif
129#ifndef HAVE_FDATASYNC
130# define fdatasync fsync
131#endif
132#ifndef HAVE_XTABS
133# define XTABS TAB3
134#endif
135
136
137/* Some libc's forget to declare these, do it ourself */
138
139extern char **environ;
140#if defined(__GLIBC__) && __GLIBC__ < 2
141int vdprintf(int d, const char *format, va_list ap);
142#endif
143/* klogctl is in libc's klog.h, but we cheat and not #include that */
144int klogctl(int type, char *b, int len);
145#ifndef PATH_MAX
146# define PATH_MAX 256
147#endif
148#ifndef BUFSIZ
149# define BUFSIZ 4096
150#endif
151
152
153/* Busybox does not use threads, we can speed up stdio. */
154#ifdef HAVE_UNLOCKED_STDIO
155# undef getc
156# define getc(stream) getc_unlocked(stream)
157# undef getchar
158# define getchar() getchar_unlocked()
159# undef putc
160# define putc(c, stream) putc_unlocked(c, stream)
161# undef putchar
162# define putchar(c) putchar_unlocked(c)
163# undef fgetc
164# define fgetc(stream) getc_unlocked(stream)
165# undef fputc
166# define fputc(c, stream) putc_unlocked(c, stream)
167#endif
168/* Above functions are required by POSIX.1-2008, below ones are extensions */
169#ifdef HAVE_UNLOCKED_LINE_OPS
170# undef fgets
171# define fgets(s, n, stream) fgets_unlocked(s, n, stream)
172# undef fputs
173# define fputs(s, stream) fputs_unlocked(s, stream)
174#endif
175
176
177/* Make all declarations hidden (-fvisibility flag only affects definitions) */
178/* (don't include system headers after this until corresponding pop!) */
179PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
180
181
182#if ENABLE_USE_BB_PWD_GRP
183# include "pwd_.h"
184# include "grp_.h"
185#endif
186#if ENABLE_FEATURE_SHADOWPASSWDS
187# if ENABLE_USE_BB_SHADOW
188# include "shadow_.h"
189# endif
190#endif
191
192/* Tested to work correctly with all int types (IIRC :]) */
193#define MAXINT(T) (T)( \
194 ((T)-1) > 0 \
195 ? (T)-1 \
196 : (T)~((T)1 << (sizeof(T)*8-1)) \
197 )
198
199#define MININT(T) (T)( \
200 ((T)-1) > 0 \
201 ? (T)0 \
202 : ((T)1 << (sizeof(T)*8-1)) \
203 )
204
205/* Large file support */
206/* Note that CONFIG_LFS=y forces bbox to be built with all common ops
207 * (stat, lseek etc) mapped to "largefile" variants by libc.
208 * Practically it means that open() automatically has O_LARGEFILE added
209 * and all filesize/file_offset parameters and struct members are "large"
210 * (in today's world - signed 64bit). For full support of large files,
211 * we need a few helper #defines (below) and careful use of off_t
212 * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
213#if ENABLE_LFS
214/* CONFIG_LFS is on */
215# if ULONG_MAX > 0xffffffff
216/* "long" is long enough on this system */
217typedef unsigned long uoff_t;
218# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
219/* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
220# define BB_STRTOOFF bb_strtoul
221# define STRTOOFF strtoul
222/* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
223# define OFF_FMT "l"
224# else
225/* "long" is too short, need "long long" */
226typedef unsigned long long uoff_t;
227# define XATOOFF(a) xatoull_range((a), 0, LLONG_MAX)
228# define BB_STRTOOFF bb_strtoull
229# define STRTOOFF strtoull
230# define OFF_FMT "ll"
231# endif
232#else
233/* CONFIG_LFS is off */
234# if UINT_MAX == 0xffffffff
235/* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
236 * gcc will throw warnings on printf("%d", off_t). Crap... */
237typedef unsigned long uoff_t;
238# define XATOOFF(a) xatoi_positive(a)
239# define BB_STRTOOFF bb_strtou
240# define STRTOOFF strtol
241# define OFF_FMT "l"
242# else
243typedef unsigned long uoff_t;
244# define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
245# define BB_STRTOOFF bb_strtoul
246# define STRTOOFF strtol
247# define OFF_FMT "l"
248# endif
249#endif
250/* scary. better ideas? (but do *test* them first!) */
251#define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
252/* Users report bionic to use 32-bit off_t even if LARGEFILE support is requested.
253 * We misdetected that. Don't let it build:
254 */
255struct BUG_off_t_size_is_misdetected {
256 char BUG_off_t_size_is_misdetected[sizeof(off_t) == sizeof(uoff_t) ? 1 : -1];
257};
258
259/* Some useful definitions */
260#undef FALSE
261#define FALSE ((int) 0)
262#undef TRUE
263#define TRUE ((int) 1)
264#undef SKIP
265#define SKIP ((int) 2)
266
267/* Macros for min/max. */
268#ifndef MIN
269#define MIN(a,b) (((a)<(b))?(a):(b))
270#endif
271
272#ifndef MAX
273#define MAX(a,b) (((a)>(b))?(a):(b))
274#endif
275
276/* buffer allocation schemes */
277#if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
278#define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
279#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
280#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
281#else
282#if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
283#define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
284#define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
285#define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
286#else
287#define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
288#define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
289#define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
290#endif
291#endif
292
293#if defined(__GLIBC__)
294/* glibc uses __errno_location() to get a ptr to errno */
295/* We can just memorize it once - no multithreading in busybox :) */
296extern int *const bb_errno;
297#undef errno
298#define errno (*bb_errno)
299#endif
300
301#if !(ULONG_MAX > 0xffffffff)
302/* Only 32-bit CPUs need this, 64-bit ones use inlined version */
303uint64_t bb_bswap_64(uint64_t x) FAST_FUNC;
304#endif
305
306unsigned long long monotonic_ns(void) FAST_FUNC;
307unsigned long long monotonic_us(void) FAST_FUNC;
308unsigned long long monotonic_ms(void) FAST_FUNC;
309unsigned monotonic_sec(void) FAST_FUNC;
310
311extern void chomp(char *s) FAST_FUNC;
312extern void trim(char *s) FAST_FUNC;
313extern char *skip_whitespace(const char *) FAST_FUNC;
314extern char *skip_non_whitespace(const char *) FAST_FUNC;
315extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC;
316
317extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
318
319//TODO: supply a pointer to char[11] buffer (avoid statics)?
320extern const char *bb_mode_string(mode_t mode) FAST_FUNC;
321extern int is_directory(const char *name, int followLinks) FAST_FUNC;
322enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */
323 FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
324 FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
325 FILEUTILS_RECUR = 1 << 2, /* -R */
326 FILEUTILS_FORCE = 1 << 3, /* -f */
327 FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
328 FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
329 FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
330 FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
331 FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
332#if ENABLE_SELINUX
333 FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 9, /* -c */
334 FILEUTILS_SET_SECURITY_CONTEXT = 1 << 10,
335#endif
336 FILEUTILS_IGNORE_CHMOD_ERR = 1 << 11,
337};
338#define FILEUTILS_CP_OPTSTR "pdRfilsLH" IF_SELINUX("c")
339extern int remove_file(const char *path, int flags) FAST_FUNC;
340/* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
341 * the source, not copy (unless "source" is a directory).
342 * This makes "cp /dev/null file" and "install /dev/null file" (!!!)
343 * work coreutils-compatibly. */
344extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
345
346enum {
347 ACTION_RECURSE = (1 << 0),
348 ACTION_FOLLOWLINKS = (1 << 1),
349 ACTION_FOLLOWLINKS_L0 = (1 << 2),
350 ACTION_DEPTHFIRST = (1 << 3),
351 /*ACTION_REVERSE = (1 << 4), - unused */
352 ACTION_QUIET = (1 << 5),
353 ACTION_DANGLING_OK = (1 << 6),
354};
355typedef uint8_t recurse_flags_t;
356extern int recursive_action(const char *fileName, unsigned flags,
357 int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
358 int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
359 void* userData, unsigned depth) FAST_FUNC;
360extern int device_open(const char *device, int mode) FAST_FUNC;
361enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
362extern int xgetpty(char *line) FAST_FUNC;
363extern int get_console_fd_or_die(void) FAST_FUNC;
364extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
365extern char *find_block_device(const char *path) FAST_FUNC;
366/* bb_copyfd_XX print read/write errors and return -1 if they occur */
367extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
368extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
369extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
370/* "short" copy can be detected by return value < size */
371/* this helper yells "short read!" if param is not -1 */
372extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
373
374extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
375char* strcpy_and_process_escape_sequences(char *dst, const char *src) FAST_FUNC;
376/* xxxx_strip version can modify its parameter:
377 * "/" -> "/"
378 * "abc" -> "abc"
379 * "abc/def" -> "def"
380 * "abc/def/" -> "def" !!
381 */
382char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
383/* "abc/def/" -> "" and it never modifies 'path' */
384char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
385/* Simpler version: does not special case "/" string */
386const char *bb_basename(const char *name) FAST_FUNC;
387/* NB: can violate const-ness (similarly to strchr) */
388char *last_char_is(const char *s, int c) FAST_FUNC;
389
390void ndelay_on(int fd) FAST_FUNC;
391void ndelay_off(int fd) FAST_FUNC;
392void close_on_exec_on(int fd) FAST_FUNC;
393void xdup2(int, int) FAST_FUNC;
394void xmove_fd(int, int) FAST_FUNC;
395
396
397DIR *xopendir(const char *path) FAST_FUNC;
398DIR *warn_opendir(const char *path) FAST_FUNC;
399
400char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC;
401char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
402char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
403/* !RETURNS_MALLOC: it's a realloc-like function */
404char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
405
406char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
407
408
409enum {
410 /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
411 * otherwise would kill us, except for those resulting from bugs:
412 * SIGSEGV, SIGILL, SIGFPE.
413 * Other fatal signals not included (TODO?):
414 * SIGBUS Bus error (bad memory access)
415 * SIGPOLL Pollable event. Synonym of SIGIO
416 * SIGPROF Profiling timer expired
417 * SIGSYS Bad argument to routine
418 * SIGTRAP Trace/breakpoint trap
419 *
420 * The only known arch with some of these sigs not fitting
421 * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36).
422 * Dance around with long long to guard against that...
423 */
424 BB_FATAL_SIGS = (int)(0
425 + (1LL << SIGHUP)
426 + (1LL << SIGINT)
427 + (1LL << SIGTERM)
428 + (1LL << SIGPIPE) // Write to pipe with no readers
429 + (1LL << SIGQUIT) // Quit from keyboard
430 + (1LL << SIGABRT) // Abort signal from abort(3)
431 + (1LL << SIGALRM) // Timer signal from alarm(2)
432 + (1LL << SIGVTALRM) // Virtual alarm clock
433 + (1LL << SIGXCPU) // CPU time limit exceeded
434 + (1LL << SIGXFSZ) // File size limit exceeded
435 + (1LL << SIGUSR1) // Yes kids, these are also fatal!
436 + (1LL << SIGUSR2)
437 + 0),
438};
439void bb_signals(int sigs, void (*f)(int)) FAST_FUNC;
440/* Unlike signal() and bb_signals, sets handler with sigaction()
441 * and in a way that while signal handler is run, no other signals
442 * will be blocked; syscalls will not be restarted: */
443void bb_signals_recursive_norestart(int sigs, void (*f)(int)) FAST_FUNC;
444/* syscalls like read() will be interrupted with EINTR: */
445void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
446/* syscalls like read() won't be interrupted (though select/poll will be): */
447void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
448void wait_for_any_sig(void) FAST_FUNC;
449void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
450void sig_block(int sig) FAST_FUNC;
451void sig_unblock(int sig) FAST_FUNC;
452/* Will do sigaction(signum, act, NULL): */
453int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
454/* SIG_BLOCK/SIG_UNBLOCK all signals: */
455int sigprocmask_allsigs(int how) FAST_FUNC;
456/* Standard handler which just records signo */
457extern smallint bb_got_signal;
458void record_signo(int signo); /* not FAST_FUNC! */
459
460
461void xsetgid(gid_t gid) FAST_FUNC;
462void xsetuid(uid_t uid) FAST_FUNC;
463void xchdir(const char *path) FAST_FUNC;
464void xchroot(const char *path) FAST_FUNC;
465void xsetenv(const char *key, const char *value) FAST_FUNC;
466void bb_unsetenv(const char *key) FAST_FUNC;
467void bb_unsetenv_and_free(char *key) FAST_FUNC;
468void xunlink(const char *pathname) FAST_FUNC;
469void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
470void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC;
471int xopen(const char *pathname, int flags) FAST_FUNC;
472int xopen_nonblocking(const char *pathname) FAST_FUNC;
473int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
474int open_or_warn(const char *pathname, int flags) FAST_FUNC;
475int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
476int open_or_warn_stdin(const char *pathname) FAST_FUNC;
477int xopen_stdin(const char *pathname) FAST_FUNC;
478void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
479int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
480off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
481int xmkstemp(char *template) FAST_FUNC;
482off_t fdlength(int fd) FAST_FUNC;
483
484uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
485 const char *override,
486 unsigned override_units,
487 int extend);
488
489void xpipe(int filedes[2]) FAST_FUNC;
490/* In this form code with pipes is much more readable */
491struct fd_pair { int rd; int wr; };
492#define piped_pair(pair) pipe(&((pair).rd))
493#define xpiped_pair(pair) xpipe(&((pair).rd))
494
495/* Useful for having small structure members/global variables */
496typedef int8_t socktype_t;
497typedef int8_t family_t;
498struct BUG_too_small {
499 char BUG_socktype_t_too_small[(0
500 | SOCK_STREAM
501 | SOCK_DGRAM
502 | SOCK_RDM
503 | SOCK_SEQPACKET
504 | SOCK_RAW
505 ) <= 127 ? 1 : -1];
506 char BUG_family_t_too_small[(0
507 | AF_UNSPEC
508 | AF_INET
509 | AF_INET6
510 | AF_UNIX
511#ifdef AF_PACKET
512 | AF_PACKET
513#endif
514#ifdef AF_NETLINK
515 | AF_NETLINK
516#endif
517 /* | AF_DECnet */
518 /* | AF_IPX */
519 ) <= 127 ? 1 : -1];
520};
521
522
523void parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
524time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
525
526
527int xsocket(int domain, int type, int protocol) FAST_FUNC;
528void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
529void xlisten(int s, int backlog) FAST_FUNC;
530void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
531ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
532 socklen_t tolen) FAST_FUNC;
533/* SO_REUSEADDR allows a server to rebind to an address that is already
534 * "in use" by old connections to e.g. previous server instance which is
535 * killed or crashed. Without it bind will fail until all such connections
536 * time out. Linux does not allow multiple live binds on same ip:port
537 * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
538 * Turn it on before you call bind(). */
539void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
540int setsockopt_broadcast(int fd) FAST_FUNC;
541int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
542/* NB: returns port in host byte order */
543unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
544typedef struct len_and_sockaddr {
545 socklen_t len;
546 union {
547 struct sockaddr sa;
548 struct sockaddr_in sin;
549#if ENABLE_FEATURE_IPV6
550 struct sockaddr_in6 sin6;
551#endif
552 } u;
553} len_and_sockaddr;
554enum {
555 LSA_LEN_SIZE = offsetof(len_and_sockaddr, u),
556 LSA_SIZEOF_SA = sizeof(
557 union {
558 struct sockaddr sa;
559 struct sockaddr_in sin;
560#if ENABLE_FEATURE_IPV6
561 struct sockaddr_in6 sin6;
562#endif
563 }
564 )
565};
566/* Create stream socket, and allocate suitable lsa.
567 * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
568 * af == AF_UNSPEC will result in trying to create IPv6 socket,
569 * and if kernel doesn't support it, fall back to IPv4.
570 * This is useful if you plan to bind to resulting local lsa.
571 */
572int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
573int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
574/* Create server socket bound to bindaddr:port. bindaddr can be NULL,
575 * numeric IP ("N.N.N.N") or numeric IPv6 address,
576 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
577 * Only if there is no suffix, port argument is used */
578/* NB: these set SO_REUSEADDR before bind */
579int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
580int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
581/* Create client TCP socket connected to peer:port. Peer cannot be NULL.
582 * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
583 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
584 * If there is no suffix, port argument is used */
585int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
586/* Connect to peer identified by lsa */
587int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
588/* Get local address of bound or accepted socket */
589len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
590/* Get remote address of connected or accepted socket */
591len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
592/* Return malloc'ed len_and_sockaddr with socket address of host:port
593 * Currently will return IPv4 or IPv6 sockaddrs only
594 * (depending on host), but in theory nothing prevents e.g.
595 * UNIX socket address being returned, IPX sockaddr etc...
596 * On error does bb_error_msg and returns NULL */
597len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
598/* Version which dies on error */
599len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
600len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
601/* Same, useful if you want to force family (e.g. IPv6) */
602#if !ENABLE_FEATURE_IPV6
603#define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
604#define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
605#else
606len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
607len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
608#endif
609/* Assign sin[6]_port member if the socket is an AF_INET[6] one,
610 * otherwise no-op. Useful for ftp.
611 * NB: does NOT do htons() internally, just direct assignment. */
612void set_nport(struct sockaddr *sa, unsigned port) FAST_FUNC;
613/* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
614int get_nport(const struct sockaddr *sa) FAST_FUNC;
615/* Reverse DNS. Returns NULL on failure. */
616char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
617/* This one doesn't append :PORTNUM */
618char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
619/* This one also doesn't fall back to dotted IP (returns NULL) */
620char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
621/* inet_[ap]ton on steroids */
622char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
623char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
624// "old" (ipv4 only) API
625// users: traceroute.c hostname.c - use _list_ of all IPs
626struct hostent *xgethostbyname(const char *name) FAST_FUNC;
627// Also mount.c and inetd.c are using gethostbyname(),
628// + inet_common.c has additional IPv4-only stuff
629
630
631void socket_want_pktinfo(int fd) FAST_FUNC;
632ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
633 const struct sockaddr *to,
634 const struct sockaddr *from,
635 socklen_t tolen) FAST_FUNC;
636ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
637 struct sockaddr *from,
638 struct sockaddr *to,
639 socklen_t sa_size) FAST_FUNC;
640
641uint16_t inet_cksum(uint16_t *addr, int len) FAST_FUNC;
642
643char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
644char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC;
645void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
646char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
647char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
648/* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
649 * But potentially slow, don't use in one-billion-times loops */
650int bb_putchar(int ch) FAST_FUNC;
651/* Note: does not use stdio, writes to fd 2 directly */
652int bb_putchar_stderr(char ch) FAST_FUNC;
653char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
654// gcc-4.1.1 still isn't good enough at optimizing it
655// (+200 bytes compared to macro)
656//static ALWAYS_INLINE
657//int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
658//static ALWAYS_INLINE
659//int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
660#define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
661#define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
662#define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
663#define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
664#define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
665
666typedef struct uni_stat_t {
667 unsigned byte_count;
668 unsigned unicode_count;
669 unsigned unicode_width;
670} uni_stat_t;
671/* Returns a string with unprintable chars replaced by '?' or
672 * SUBST_WCHAR. This function is unicode-aware. */
673const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str);
674/* Prints unprintable char ch as ^C or M-c to file
675 * (M-c is used only if ch is ORed with PRINTABLE_META),
676 * else it is printed as-is (except for ch = 0x9b) */
677enum { PRINTABLE_META = 0x100 };
678void fputc_printable(int ch, FILE *file) FAST_FUNC;
679
680/* dmalloc will redefine these to it's own implementation. It is safe
681 * to have the prototypes here unconditionally. */
682void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
683void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
684void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
685void *xrealloc(void *old, size_t size) FAST_FUNC;
686/* After v = xrealloc_vector(v, SHIFT, idx) it's ok to use
687 * at least v[idx] and v[idx+1], for all idx values.
688 * SHIFT specifies how many new elements are added (1:2, 2:4, ..., 8:256...)
689 * when all elements are used up. New elements are zeroed out.
690 * xrealloc_vector(v, SHIFT, idx) *MUST* be called with consecutive IDXs -
691 * skipping an index is a bad bug - it may miss a realloc!
692 */
693#define xrealloc_vector(vector, shift, idx) \
694 xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
695void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
696
697
698extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
699extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count, int loop_on_EINTR) FAST_FUNC;
700// NB: will return short read on error, not -1,
701// if some data was read before error occurred
702extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
703extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
704extern unsigned char xread_char(int fd) FAST_FUNC;
705extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
706extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
707// Reads one line a-la fgets (but doesn't save terminating '\n').
708// Reads byte-by-byte. Useful when it is important to not read ahead.
709// Bytes are appended to pfx (which must be malloced, or NULL).
710extern char *xmalloc_reads(int fd, size_t *maxsz_p) FAST_FUNC;
711/* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
712extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
713/* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
714extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
715/* Never returns NULL */
716extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
717
718#define SEAMLESS_COMPRESSION (0 \
719 || ENABLE_FEATURE_SEAMLESS_XZ \
720 || ENABLE_FEATURE_SEAMLESS_LZMA \
721 || ENABLE_FEATURE_SEAMLESS_BZ2 \
722 || ENABLE_FEATURE_SEAMLESS_GZ \
723 || ENABLE_FEATURE_SEAMLESS_Z)
724
725#if SEAMLESS_COMPRESSION
726/* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
727extern int setup_unzip_on_fd(int fd, int fail_if_not_detected) FAST_FUNC;
728/* Autodetects .gz etc */
729extern int open_zipped(const char *fname) FAST_FUNC;
730#else
731# define setup_unzip_on_fd(...) (0)
732# define open_zipped(fname) open((fname), O_RDONLY);
733#endif
734extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
735
736extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
737// NB: will return short write on error, not -1,
738// if some data was written before error occurred
739extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
740extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
741extern void xwrite_str(int fd, const char *str) FAST_FUNC;
742extern ssize_t full_write1_str(const char *str) FAST_FUNC;
743extern ssize_t full_write2_str(const char *str) FAST_FUNC;
744extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
745
746/* Close fd, but check for failures (some types of write errors) */
747extern void xclose(int fd) FAST_FUNC;
748
749/* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
750extern void xprint_and_close_file(FILE *file) FAST_FUNC;
751
752/* Reads a line from a text file, up to a newline or NUL byte, inclusive.
753 * Returns malloc'ed char*. If end is NULL '\n' isn't considered
754 * end of line. If end isn't NULL, length of the chunk is stored in it.
755 * Returns NULL if EOF/error.
756 */
757extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC;
758/* Reads up to (and including) TERMINATING_STRING: */
759extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
760/* Same, with limited max size, and returns the length (excluding NUL): */
761extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
762/* Chops off TERMINATING_STRING from the end: */
763extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
764/* Reads up to (and including) "\n" or NUL byte: */
765extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
766/* Chops off '\n' from the end, unlike fgets: */
767extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
768/* Same, but doesn't try to conserve space (may have some slack after the end) */
769/* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
770
771void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
772void die_if_ferror_stdout(void) FAST_FUNC;
773int fflush_all(void) FAST_FUNC;
774void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
775int fclose_if_not_stdin(FILE *file) FAST_FUNC;
776FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
777/* Prints warning to stderr and returns NULL on failure: */
778FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
779/* "Opens" stdin if filename is special, else just opens file: */
780FILE* xfopen_stdin(const char *filename) FAST_FUNC;
781FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
782FILE* fopen_for_read(const char *path) FAST_FUNC;
783FILE* xfopen_for_read(const char *path) FAST_FUNC;
784FILE* fopen_for_write(const char *path) FAST_FUNC;
785FILE* xfopen_for_write(const char *path) FAST_FUNC;
786FILE* xfdopen_for_read(int fd) FAST_FUNC;
787FILE* xfdopen_for_write(int fd) FAST_FUNC;
788
789int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
790void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
791
792/* Wrapper which restarts poll on EINTR or ENOMEM.
793 * On other errors complains [perror("poll")] and returns.
794 * Warning! May take (much) longer than timeout_ms to return!
795 * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
796int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
797
798char *safe_gethostname(void) FAST_FUNC;
799
800/* Convert each alpha char in str to lower-case */
801char* str_tolower(char *str) FAST_FUNC;
802
803char *utoa(unsigned n) FAST_FUNC;
804char *itoa(int n) FAST_FUNC;
805/* Returns a pointer past the formatted number, does NOT null-terminate */
806char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
807char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
808/* Intelligent formatters of bignums */
809void smart_ulltoa4(unsigned long long ul, char buf[4], const char *scale) FAST_FUNC;
810void smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
811/* If block_size == 0, display size without fractional part,
812 * else display (size * block_size) with one decimal digit.
813 * If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
814 * else divide by display_unit and do not use suffix. */
815#define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
816#define HUMAN_READABLE_MAX_WIDTH_STR "7"
817//TODO: provide pointer to buf (avoid statics)?
818const char *make_human_readable_str(unsigned long long size,
819 unsigned long block_size, unsigned long display_unit) FAST_FUNC;
820/* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
821char *bin2hex(char *dst, const char *src, int count) FAST_FUNC;
822/* Reverse */
823char* hex2bin(char *dst, const char *src, int count) FAST_FUNC;
824
825/* Generate a UUID */
826void generate_uuid(uint8_t *buf) FAST_FUNC;
827
828/* Last element is marked by mult == 0 */
829struct suffix_mult {
830 char suffix[4];
831 unsigned mult;
832};
833#include "xatonum.h"
834/* Specialized: */
835
836/* Using xatoi() instead of naive atoi() is not always convenient -
837 * in many places people want *non-negative* values, but store them
838 * in signed int. Therefore we need this one:
839 * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc.
840 * It should really be named xatoi_nonnegative (since it allows 0),
841 * but that would be too long.
842 */
843int xatoi_positive(const char *numstr) FAST_FUNC;
844
845/* Useful for reading port numbers */
846uint16_t xatou16(const char *numstr) FAST_FUNC;
847
848
849/* These parse entries in /etc/passwd and /etc/group. This is desirable
850 * for BusyBox since we want to avoid using the glibc NSS stuff, which
851 * increases target size and is often not needed on embedded systems. */
852long xuname2uid(const char *name) FAST_FUNC;
853long xgroup2gid(const char *name) FAST_FUNC;
854/* wrapper: allows string to contain numeric uid or gid */
855unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
856/* from chpst. Does not die, returns 0 on failure */
857struct bb_uidgid_t {
858 uid_t uid;
859 gid_t gid;
860};
861/* always sets uid and gid */
862int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok) FAST_FUNC;
863/* always sets uid and gid, allows numeric; exits on failure */
864void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
865/* chown-like handling of "user[:[group]" */
866void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
867struct passwd* xgetpwnam(const char *name) FAST_FUNC;
868struct group* xgetgrnam(const char *name) FAST_FUNC;
869struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
870struct group* xgetgrgid(gid_t gid) FAST_FUNC;
871char* xuid2uname(uid_t uid) FAST_FUNC;
872char* xgid2group(gid_t gid) FAST_FUNC;
873char* uid2uname(uid_t uid) FAST_FUNC;
874char* gid2group(gid_t gid) FAST_FUNC;
875char* uid2uname_utoa(uid_t uid) FAST_FUNC;
876char* gid2group_utoa(gid_t gid) FAST_FUNC;
877/* versions which cache results (useful for ps, ls etc) */
878const char* get_cached_username(uid_t uid) FAST_FUNC;
879const char* get_cached_groupname(gid_t gid) FAST_FUNC;
880void clear_username_cache(void) FAST_FUNC;
881/* internally usernames are saved in fixed-sized char[] buffers */
882enum { USERNAME_MAX_SIZE = 32 - sizeof(uid_t) };
883#if ENABLE_FEATURE_CHECK_NAMES
884void die_if_bad_username(const char* name) FAST_FUNC;
885#else
886#define die_if_bad_username(name) ((void)(name))
887#endif
888
889#if ENABLE_FEATURE_UTMP
890void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
891void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
892#else
893# define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
894# define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
895#endif
896
897
898int execable_file(const char *name) FAST_FUNC;
899char *find_execable(const char *filename, char **PATHp) FAST_FUNC;
900int exists_execable(const char *filename) FAST_FUNC;
901
902/* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff),
903 * but it may exec busybox and call applet instead of searching PATH.
904 */
905#if ENABLE_FEATURE_PREFER_APPLETS
906int BB_EXECVP(const char *file, char *const argv[]) FAST_FUNC;
907#define BB_EXECLP(prog,cmd,...) \
908 do { \
909 if (find_applet_by_name(prog) >= 0) \
910 execlp(bb_busybox_exec_path, cmd, __VA_ARGS__); \
911 execlp(prog, cmd, __VA_ARGS__); \
912 } while (0)
913#else
914#define BB_EXECVP(prog,cmd) execvp(prog,cmd)
915#define BB_EXECLP(prog,cmd,...) execlp(prog,cmd,__VA_ARGS__)
916#endif
917int BB_EXECVP_or_die(char **argv) NORETURN FAST_FUNC;
918
919/* xvfork() can't be a _function_, return after vfork mangles stack
920 * in the parent. It must be a macro. */
921#define xvfork() \
922({ \
923 pid_t bb__xvfork_pid = vfork(); \
924 if (bb__xvfork_pid < 0) \
925 bb_perror_msg_and_die("vfork"); \
926 bb__xvfork_pid; \
927})
928#if BB_MMU
929pid_t xfork(void) FAST_FUNC;
930#endif
931
932/* NOMMU friendy fork+exec: */
933pid_t spawn(char **argv) FAST_FUNC;
934pid_t xspawn(char **argv) FAST_FUNC;
935
936pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
937pid_t wait_any_nohang(int *wstat) FAST_FUNC;
938/* wait4pid: unlike waitpid, waits ONLY for one process.
939 * Returns sig + 0x180 if child is killed by signal.
940 * It's safe to pass negative 'pids' from failed [v]fork -
941 * wait4pid will return -1 (and will not clobber [v]fork's errno).
942 * IOW: rc = wait4pid(spawn(argv));
943 * if (rc < 0) bb_perror_msg("%s", argv[0]);
944 * if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff);
945 */
946int wait4pid(pid_t pid) FAST_FUNC;
947/* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
948int spawn_and_wait(char **argv) FAST_FUNC;
949/* Does NOT check that applet is NOFORK, just blindly runs it */
950int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
951
952/* Helpers for daemonization.
953 *
954 * bb_daemonize(flags) = daemonize, does not compile on NOMMU
955 *
956 * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
957 * rexec's itself on NOMMU with argv passed as command line.
958 * Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
959 * from the start. (It will detect it and not reexec again second time).
960 * You have to audit carefully that you don't do something twice as a result
961 * (opening files/sockets, parsing config files etc...)!
962 *
963 * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
964 * (will do setsid()).
965 *
966 * fork_or_rexec(argv) = bare-bones fork on MMU,
967 * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
968 * On MMU ignores argv.
969 *
970 * Helper for network daemons in foreground mode:
971 *
972 * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
973 * to /dev/null if they are not.
974 */
975enum {
976 DAEMON_CHDIR_ROOT = 1,
977 DAEMON_DEVNULL_STDIO = 2,
978 DAEMON_CLOSE_EXTRA_FDS = 4,
979 DAEMON_ONLY_SANITIZE = 8, /* internal use */
980 DAEMON_DOUBLE_FORK = 16, /* double fork to avoid controlling tty */
981};
982#if BB_MMU
983 enum { re_execed = 0 };
984# define fork_or_rexec(argv) xfork()
985# define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
986# define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
987#else
988 extern bool re_execed;
989 /* Note: re_exec() and fork_or_rexec() do argv[0][0] |= 0x80 on NOMMU!
990 * _Parent_ needs to undo it if it doesn't want to have argv[0] mangled.
991 */
992 void re_exec(char **argv) NORETURN FAST_FUNC;
993 pid_t fork_or_rexec(char **argv) FAST_FUNC;
994 int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
995 int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
996 void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
997# define fork() BUG_fork_is_unavailable_on_nommu()
998# define xfork() BUG_fork_is_unavailable_on_nommu()
999# define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
1000# define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
1001#endif
1002void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
1003void bb_sanitize_stdio(void) FAST_FUNC;
1004/* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
1005int sanitize_env_if_suid(void) FAST_FUNC;
1006
1007
1008char* single_argv(char **argv) FAST_FUNC;
1009extern const char *const bb_argv_dash[]; /* "-", NULL */
1010extern const char *opt_complementary;
1011#if ENABLE_LONG_OPTS || ENABLE_FEATURE_GETOPT_LONG
1012#define No_argument "\0"
1013#define Required_argument "\001"
1014#define Optional_argument "\002"
1015extern const char *applet_long_options;
1016#endif
1017extern uint32_t option_mask32;
1018extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
1019
1020
1021/* Having next pointer as a first member allows easy creation
1022 * of "llist-compatible" structs, and using llist_FOO functions
1023 * on them.
1024 */
1025typedef struct llist_t {
1026 struct llist_t *link;
1027 char *data;
1028} llist_t;
1029void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
1030void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
1031void *llist_pop(llist_t **elm) FAST_FUNC;
1032void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
1033void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
1034llist_t *llist_rev(llist_t *list) FAST_FUNC;
1035llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
1036/* BTW, surprisingly, changing API to
1037 * llist_t *llist_add_to(llist_t *old_head, void *data)
1038 * etc does not result in smaller code... */
1039
1040/* start_stop_daemon and udhcpc are special - they want
1041 * to create pidfiles regardless of FEATURE_PIDFILE */
1042#if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
1043/* True only if we created pidfile which is *file*, not /dev/null etc */
1044extern smallint wrote_pidfile;
1045void write_pidfile(const char *path) FAST_FUNC;
1046#define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
1047#else
1048enum { wrote_pidfile = 0 };
1049#define write_pidfile(path) ((void)0)
1050#define remove_pidfile(path) ((void)0)
1051#endif
1052
1053enum {
1054 LOGMODE_NONE = 0,
1055 LOGMODE_STDIO = (1 << 0),
1056 LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
1057 LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
1058};
1059extern const char *msg_eol;
1060extern smallint logmode;
1061extern int die_sleep;
1062extern uint8_t xfunc_error_retval;
1063extern jmp_buf die_jmp;
1064extern void xfunc_die(void) NORETURN FAST_FUNC;
1065extern void bb_show_usage(void) NORETURN FAST_FUNC;
1066extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1067extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1068extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1069extern void bb_simple_perror_msg(const char *s) FAST_FUNC;
1070extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1071extern void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
1072extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1073extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1074extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
1075extern void bb_perror_nomsg(void) FAST_FUNC;
1076extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1077extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
1078
1079/* We need to export XXX_main from libbusybox
1080 * only if we build "individual" binaries
1081 */
1082#if ENABLE_FEATURE_INDIVIDUAL
1083#define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
1084#else
1085#define MAIN_EXTERNALLY_VISIBLE
1086#endif
1087
1088
1089/* Applets which are useful from another applets */
1090int bb_cat(char** argv);
1091/* If shell needs them, they exist even if not enabled as applets */
1092int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE);
1093int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE);
1094int test_main(int argc, char **argv) IF_TEST(MAIN_EXTERNALLY_VISIBLE);
1095int kill_main(int argc, char **argv) IF_KILL(MAIN_EXTERNALLY_VISIBLE);
1096/* Similar, but used by chgrp, not shell */
1097int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE);
1098/* Used by ftpd */
1099int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE);
1100/* Don't need IF_xxx() guard for these */
1101int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1102int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1103
1104#if ENABLE_ROUTE
1105void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
1106#endif
1107
1108
1109/* Networking */
1110int create_icmp_socket(void) FAST_FUNC;
1111int create_icmp6_socket(void) FAST_FUNC;
1112/* interface.c */
1113/* This structure defines protocol families and their handlers. */
1114struct aftype {
1115 const char *name;
1116 const char *title;
1117 int af;
1118 int alen;
1119 char* FAST_FUNC (*print)(unsigned char *);
1120 const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
1121 int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
1122 void FAST_FUNC (*herror)(char *text);
1123 int FAST_FUNC (*rprint)(int options);
1124 int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
1125 /* may modify src */
1126 int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
1127};
1128/* This structure defines hardware protocols and their handlers. */
1129struct hwtype {
1130 const char *name;
1131 const char *title;
1132 int type;
1133 int alen;
1134 char* FAST_FUNC (*print)(unsigned char *);
1135 int FAST_FUNC (*input)(const char *, struct sockaddr *);
1136 int FAST_FUNC (*activate)(int fd);
1137 int suppress_null_addr;
1138};
1139extern smallint interface_opt_a;
1140int display_interfaces(char *ifname) FAST_FUNC;
1141#if ENABLE_FEATURE_HWIB
1142int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
1143#else
1144#define in_ib(a, b) 1 /* fail */
1145#endif
1146const struct aftype *get_aftype(const char *name) FAST_FUNC;
1147const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
1148const struct hwtype *get_hwntype(int type) FAST_FUNC;
1149
1150
1151#ifndef BUILD_INDIVIDUAL
1152extern int find_applet_by_name(const char *name) FAST_FUNC;
1153/* Returns only if applet is not found. */
1154extern void run_applet_and_exit(const char *name, char **argv) FAST_FUNC;
1155extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
1156#endif
1157
1158#ifdef HAVE_MNTENT_H
1159extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
1160extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
1161#endif
1162extern void erase_mtab(const char * name) FAST_FUNC;
1163extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
1164extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
1165#if ENABLE_DESKTOP
1166extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
1167#else
1168# define bb_warn_ignoring_args(arg) ((void)0)
1169#endif
1170
1171extern int get_linux_version_code(void) FAST_FUNC;
1172
1173extern char *query_loop(const char *device) FAST_FUNC;
1174extern int del_loop(const char *device) FAST_FUNC;
1175/* If *devname is not NULL, use that name, otherwise try to find free one,
1176 * malloc and return it in *devname.
1177 * return value: 1: read-only loopdev was setup, 0: rw, < 0: error */
1178extern int set_loop(char **devname, const char *file, unsigned long long offset, int ro) FAST_FUNC;
1179
1180/* Like bb_ask below, but asks on stdin with no timeout. */
1181char *bb_ask_stdin(const char * prompt) FAST_FUNC;
1182//TODO: pass buf pointer or return allocated buf (avoid statics)?
1183char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
1184int bb_ask_confirmation(void) FAST_FUNC;
1185
1186int bb_parse_mode(const char* s, mode_t* theMode) FAST_FUNC;
1187
1188/*
1189 * Config file parser
1190 */
1191enum {
1192 PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one
1193 PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters
1194// TODO: COLLAPSE and TRIM seem to always go in pair
1195 PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line
1196 PARSE_MIN_DIE = 0x00100000, // die if < min tokens found
1197 // keep a copy of current line
1198 PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D,
1199 PARSE_EOL_COMMENTS = 0x00400000, // comments are recognized even if they aren't the first char
1200 // NORMAL is:
1201 // * remove leading and trailing delimiters and collapse
1202 // multiple delimiters into one
1203 // * warn and continue if less than mintokens delimiters found
1204 // * grab everything into last token
1205 // * comments are recognized even if they aren't the first char
1206 PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY | PARSE_EOL_COMMENTS,
1207};
1208typedef struct parser_t {
1209 FILE *fp;
1210 char *data;
1211 char *line, *nline;
1212 size_t line_alloc, nline_alloc;
1213 int lineno;
1214} parser_t;
1215parser_t* config_open(const char *filename) FAST_FUNC;
1216parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
1217/* delims[0] is a comment char (use '\0' to disable), the rest are token delimiters */
1218int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
1219#define config_read(parser, tokens, max, min, str, flags) \
1220 config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
1221void config_close(parser_t *parser) FAST_FUNC;
1222
1223/* Concatenate path and filename to new allocated buffer.
1224 * Add "/" only as needed (no duplicate "//" are produced).
1225 * If path is NULL, it is assumed to be "/".
1226 * filename should not be NULL. */
1227char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
1228/* Returns NULL on . and .. */
1229char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
1230
1231
1232int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
1233
1234int get_signum(const char *name) FAST_FUNC;
1235const char *get_signame(int number) FAST_FUNC;
1236void print_signames(void) FAST_FUNC;
1237
1238char *bb_simplify_path(const char *path) FAST_FUNC;
1239/* Returns ptr to NUL */
1240char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
1241
1242#define LOGIN_FAIL_DELAY 3
1243extern void bb_do_delay(int seconds) FAST_FUNC;
1244extern void change_identity(const struct passwd *pw) FAST_FUNC;
1245extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) NORETURN FAST_FUNC;
1246
1247/* Returns $SHELL, getpwuid(getuid())->pw_shell, or DEFAULT_SHELL.
1248 * Note that getpwuid result might need xstrdup'ing
1249 * if there is a possibility of intervening getpwxxx() calls.
1250 */
1251const char *get_shell_name(void) FAST_FUNC;
1252
1253#if ENABLE_SELINUX
1254extern void renew_current_security_context(void) FAST_FUNC;
1255extern void set_current_security_context(security_context_t sid) FAST_FUNC;
1256extern context_t set_security_context_component(security_context_t cur_context,
1257 char *user, char *role, char *type, char *range) FAST_FUNC;
1258extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
1259extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
1260#else
1261#define selinux_preserve_fcontext(fdesc) ((void)0)
1262#endif
1263extern void selinux_or_die(void) FAST_FUNC;
1264
1265
1266/* systemd support */
1267#define SD_LISTEN_FDS_START 3
1268int sd_listen_fds(void);
1269
1270
1271/* setup_environment:
1272 * if chdir pw->pw_dir: ok: else if to_tmp == 1: goto /tmp else: goto / or die
1273 * if clear_env = 1: cd(pw->pw_dir), clear environment, then set
1274 * TERM=(old value)
1275 * USER=pw->pw_name, LOGNAME=pw->pw_name
1276 * PATH=bb_default_[root_]path
1277 * HOME=pw->pw_dir
1278 * SHELL=shell
1279 * else if change_env = 1:
1280 * if not root (if pw->pw_uid != 0):
1281 * USER=pw->pw_name, LOGNAME=pw->pw_name
1282 * HOME=pw->pw_dir
1283 * SHELL=shell
1284 * else does nothing
1285 */
1286#define SETUP_ENV_CHANGEENV (1 << 0)
1287#define SETUP_ENV_CLEARENV (1 << 1)
1288#define SETUP_ENV_TO_TMP (1 << 2)
1289#define SETUP_ENV_NO_CHDIR (1 << 4)
1290extern void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC;
1291extern int correct_password(const struct passwd *pw) FAST_FUNC;
1292/* Returns a malloced string */
1293#if !ENABLE_USE_BB_CRYPT
1294#define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
1295#endif
1296extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
1297extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
1298/*
1299 * rnd is additional random input. New one is returned.
1300 * Useful if you call crypt_make_salt many times in a row:
1301 * rnd = crypt_make_salt(buf1, 4, 0);
1302 * rnd = crypt_make_salt(buf2, 4, rnd);
1303 * rnd = crypt_make_salt(buf3, 4, rnd);
1304 * (otherwise we risk having same salt generated)
1305 */
1306extern int crypt_make_salt(char *p, int cnt /*, int rnd*/) FAST_FUNC;
1307/* "$N$" + sha_salt_16_bytes + NUL */
1308#define MAX_PW_SALT_LEN (3 + 16 + 1)
1309extern char* crypt_make_pw_salt(char p[MAX_PW_SALT_LEN], const char *algo) FAST_FUNC;
1310
1311
1312/* Returns number of lines changed, or -1 on error */
1313#if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
1314#define update_passwd(filename, username, data, member) \
1315 update_passwd(filename, username, data)
1316#endif
1317extern int update_passwd(const char *filename,
1318 const char *username,
1319 const char *data,
1320 const char *member) FAST_FUNC;
1321
1322int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
1323int index_in_strings(const char *strings, const char *key) FAST_FUNC;
1324int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
1325int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
1326const char *nth_string(const char *strings, int n) FAST_FUNC;
1327
1328extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
1329extern void print_login_prompt(void) FAST_FUNC;
1330
1331char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
1332/* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
1333int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
1334
1335int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
1336
1337/* NB: "unsigned request" is crucial! "int request" will break some arches! */
1338int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1339int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1340#if ENABLE_IOCTL_HEX2STR_ERROR
1341int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1342int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1343#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
1344#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
1345#else
1346int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
1347int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
1348#define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
1349#define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
1350#endif
1351
1352char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
1353void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
1354void reset_ino_dev_hashtable(void) FAST_FUNC;
1355#ifdef __GLIBC__
1356/* At least glibc has horrendously large inline for this, so wrap it */
1357unsigned long long bb_makedev(unsigned major, unsigned minor) FAST_FUNC;
1358#undef makedev
1359#define makedev(a,b) bb_makedev(a,b)
1360#endif
1361
1362
1363/* "Keycodes" that report an escape sequence.
1364 * We use something which fits into signed char,
1365 * yet doesn't represent any valid Unicode character.
1366 * Also, -1 is reserved for error indication and we don't use it. */
1367enum {
1368 KEYCODE_UP = -2,
1369 KEYCODE_DOWN = -3,
1370 KEYCODE_RIGHT = -4,
1371 KEYCODE_LEFT = -5,
1372 KEYCODE_HOME = -6,
1373 KEYCODE_END = -7,
1374 KEYCODE_INSERT = -8,
1375 KEYCODE_DELETE = -9,
1376 KEYCODE_PAGEUP = -10,
1377 KEYCODE_PAGEDOWN = -11,
1378 // -12 is reserved for Alt/Ctrl/Shift-TAB
1379#if 0
1380 KEYCODE_FUN1 = -13,
1381 KEYCODE_FUN2 = -14,
1382 KEYCODE_FUN3 = -15,
1383 KEYCODE_FUN4 = -16,
1384 KEYCODE_FUN5 = -17,
1385 KEYCODE_FUN6 = -18,
1386 KEYCODE_FUN7 = -19,
1387 KEYCODE_FUN8 = -20,
1388 KEYCODE_FUN9 = -21,
1389 KEYCODE_FUN10 = -22,
1390 KEYCODE_FUN11 = -23,
1391 KEYCODE_FUN12 = -24,
1392#endif
1393 /* Be sure that last defined value is small enough
1394 * to not interfere with Alt/Ctrl/Shift bits.
1395 * So far we do not exceed -31 (0xfff..fffe1),
1396 * which gives us three upper bits in LSB to play with.
1397 */
1398 //KEYCODE_SHIFT_TAB = (-12) & ~0x80,
1399 //KEYCODE_SHIFT_... = KEYCODE_... & ~0x80,
1400 //KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
1401 //KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
1402 KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
1403 KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
1404 //KEYCODE_ALT_UP = KEYCODE_UP & ~0x20,
1405 //KEYCODE_ALT_DOWN = KEYCODE_DOWN & ~0x20,
1406 KEYCODE_ALT_RIGHT = KEYCODE_RIGHT & ~0x20,
1407 KEYCODE_ALT_LEFT = KEYCODE_LEFT & ~0x20,
1408
1409 KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
1410 /* How long is the longest ESC sequence we know?
1411 * We want it big enough to be able to contain
1412 * cursor position sequence "ESC [ 9999 ; 9999 R"
1413 */
1414 KEYCODE_BUFFER_SIZE = 16
1415};
1416/* Note: fd may be in blocking or non-blocking mode, both make sense.
1417 * For one, less uses non-blocking mode.
1418 * Only the first read syscall inside read_key may block indefinitely
1419 * (unless fd is in non-blocking mode),
1420 * subsequent reads will time out after a few milliseconds.
1421 * Return of -1 means EOF or error (errno == 0 on EOF).
1422 * buffer[0] is used as a counter of buffered chars and must be 0
1423 * on first call.
1424 * timeout:
1425 * -2: do not poll for input;
1426 * -1: poll(-1) (i.e. block);
1427 * >=0: poll for TIMEOUT milliseconds, return -1/EAGAIN on timeout
1428 */
1429int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
1430void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
1431
1432
1433#if ENABLE_FEATURE_EDITING
1434/* It's NOT just ENABLEd or disabled. It's a number: */
1435# if defined CONFIG_FEATURE_EDITING_HISTORY && CONFIG_FEATURE_EDITING_HISTORY > 0
1436# define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
1437unsigned size_from_HISTFILESIZE(const char *hp);
1438# else
1439# define MAX_HISTORY 0
1440# endif
1441typedef struct line_input_t {
1442 int flags;
1443 const char *path_lookup;
1444# if MAX_HISTORY
1445 int cnt_history;
1446 int cur_history;
1447 int max_history; /* must never be <= 0 */
1448# if ENABLE_FEATURE_EDITING_SAVEHISTORY
1449 /* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT:
1450 * if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are
1451 * in on-disk history"
1452 * if FEATURE_EDITING_SAVE_ON_EXIT: "how many in-memory lines are
1453 * also in on-disk history (and thus need to be skipped on save)"
1454 */
1455 unsigned cnt_history_in_file;
1456 const char *hist_file;
1457# endif
1458 char *history[MAX_HISTORY + 1];
1459# endif
1460} line_input_t;
1461enum {
1462 DO_HISTORY = 1 * (MAX_HISTORY > 0),
1463 TAB_COMPLETION = 2 * ENABLE_FEATURE_TAB_COMPLETION,
1464 USERNAME_COMPLETION = 4 * ENABLE_FEATURE_USERNAME_COMPLETION,
1465 VI_MODE = 8 * ENABLE_FEATURE_EDITING_VI,
1466 WITH_PATH_LOOKUP = 0x10,
1467 FOR_SHELL = DO_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
1468};
1469line_input_t *new_line_input_t(int flags) FAST_FUNC;
1470/* So far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
1471/*
1472 * maxsize must be >= 2.
1473 * Returns:
1474 * -1 on read errors or EOF, or on bare Ctrl-D,
1475 * 0 on ctrl-C (the line entered is still returned in 'command'),
1476 * >0 length of input string, including terminating '\n'
1477 */
1478int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout) FAST_FUNC;
1479# if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1480void save_history(line_input_t *st);
1481# endif
1482#else
1483#define MAX_HISTORY 0
1484int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
1485#define read_line_input(state, prompt, command, maxsize, timeout) \
1486 read_line_input(prompt, command, maxsize)
1487#endif
1488
1489
1490#ifndef COMM_LEN
1491# ifdef TASK_COMM_LEN
1492enum { COMM_LEN = TASK_COMM_LEN };
1493# else
1494/* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
1495enum { COMM_LEN = 16 };
1496# endif
1497#endif
1498
1499struct smaprec {
1500 unsigned long mapped_rw;
1501 unsigned long mapped_ro;
1502 unsigned long shared_clean;
1503 unsigned long shared_dirty;
1504 unsigned long private_clean;
1505 unsigned long private_dirty;
1506 unsigned long stack;
1507 unsigned long smap_pss, smap_swap;
1508 unsigned long smap_size;
1509 unsigned long smap_start;
1510 char smap_mode[5];
1511 char *smap_name;
1512};
1513
1514#if !ENABLE_PMAP
1515#define procps_read_smaps(pid, total, cb, data) \
1516 procps_read_smaps(pid, total)
1517#endif
1518int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
1519 void (*cb)(struct smaprec *, void *), void *data);
1520
1521typedef struct procps_status_t {
1522 DIR *dir;
1523 IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
1524 uint8_t shift_pages_to_bytes;
1525 uint8_t shift_pages_to_kb;
1526/* Fields are set to 0/NULL if failed to determine (or not requested) */
1527 uint16_t argv_len;
1528 char *argv0;
1529 char *exe;
1530 IF_SELINUX(char *context;)
1531 IF_FEATURE_SHOW_THREADS(unsigned main_thread_pid;)
1532 /* Everything below must contain no ptrs to malloc'ed data:
1533 * it is memset(0) for each process in procps_scan() */
1534 unsigned long vsz, rss; /* we round it to kbytes */
1535 unsigned long stime, utime;
1536 unsigned long start_time;
1537 unsigned pid;
1538 unsigned ppid;
1539 unsigned pgid;
1540 unsigned sid;
1541 unsigned uid;
1542 unsigned gid;
1543#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
1544 unsigned ruid;
1545 unsigned rgid;
1546 int niceness;
1547#endif
1548 unsigned tty_major,tty_minor;
1549#if ENABLE_FEATURE_TOPMEM
1550 struct smaprec smaps;
1551#endif
1552 char state[4];
1553 /* basename of executable in exec(2), read from /proc/N/stat
1554 * (if executable is symlink or script, it is NOT replaced
1555 * by link target or interpreter name) */
1556 char comm[COMM_LEN];
1557 /* user/group? - use passwd/group parsing functions */
1558#if ENABLE_FEATURE_TOP_SMP_PROCESS
1559 int last_seen_on_cpu;
1560#endif
1561} procps_status_t;
1562/* flag bits for procps_scan(xx, flags) calls */
1563enum {
1564 PSSCAN_PID = 1 << 0,
1565 PSSCAN_PPID = 1 << 1,
1566 PSSCAN_PGID = 1 << 2,
1567 PSSCAN_SID = 1 << 3,
1568 PSSCAN_UIDGID = 1 << 4,
1569 PSSCAN_COMM = 1 << 5,
1570 /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */
1571 PSSCAN_ARGV0 = 1 << 7,
1572 PSSCAN_EXE = 1 << 8,
1573 PSSCAN_STATE = 1 << 9,
1574 PSSCAN_VSZ = 1 << 10,
1575 PSSCAN_RSS = 1 << 11,
1576 PSSCAN_STIME = 1 << 12,
1577 PSSCAN_UTIME = 1 << 13,
1578 PSSCAN_TTY = 1 << 14,
1579 PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
1580 /* NB: used by find_pid_by_name(). Any applet using it
1581 * needs to be mentioned here. */
1582 PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL
1583 || ENABLE_PGREP || ENABLE_PKILL
1584 || ENABLE_PIDOF
1585 || ENABLE_SESTATUS
1586 ),
1587 PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX,
1588 PSSCAN_START_TIME = 1 << 18,
1589 PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
1590 PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1591 PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1592 PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS,
1593};
1594//procps_status_t* alloc_procps_scan(void) FAST_FUNC;
1595void free_procps_scan(procps_status_t* sp) FAST_FUNC;
1596procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC;
1597/* Format cmdline (up to col chars) into char buf[size] */
1598/* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
1599void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
1600pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
1601pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
1602int starts_with_cpu(const char *str) FAST_FUNC;
1603unsigned get_cpu_count(void) FAST_FUNC;
1604
1605
1606/* Use strict=1 if you process input from untrusted source:
1607 * it will return NULL on invalid %xx (bad hex chars)
1608 * and str + 1 if decoded char is / or NUL.
1609 * In non-strict mode, it always succeeds (returns str),
1610 * and also it additionally decoded '+' to space.
1611 */
1612char *percent_decode_in_place(char *str, int strict) FAST_FUNC;
1613
1614
1615extern const char bb_uuenc_tbl_base64[] ALIGN1;
1616extern const char bb_uuenc_tbl_std[] ALIGN1;
1617void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC;
1618enum {
1619 BASE64_FLAG_UU_STOP = 0x100,
1620 /* Sign-extends to a value which never matches fgetc result: */
1621 BASE64_FLAG_NO_STOP_CHAR = 0x80,
1622};
1623const char *decode_base64(char **pp_dst, const char *src) FAST_FUNC;
1624void read_base64(FILE *src_stream, FILE *dst_stream, int flags) FAST_FUNC;
1625
1626typedef struct md5_ctx_t {
1627 uint8_t wbuffer[64]; /* always correctly aligned for uint64_t */
1628 void (*process_block)(struct md5_ctx_t*) FAST_FUNC;
1629 uint64_t total64; /* must be directly before hash[] */
1630 uint32_t hash[8]; /* 4 elements for md5, 5 for sha1, 8 for sha256 */
1631} md5_ctx_t;
1632typedef struct md5_ctx_t sha1_ctx_t;
1633typedef struct md5_ctx_t sha256_ctx_t;
1634typedef struct sha512_ctx_t {
1635 uint64_t total64[2]; /* must be directly before hash[] */
1636 uint64_t hash[8];
1637 uint8_t wbuffer[128]; /* always correctly aligned for uint64_t */
1638} sha512_ctx_t;
1639typedef struct sha3_ctx_t {
1640 uint64_t state[25];
1641 unsigned bytes_queued;
1642} sha3_ctx_t;
1643void md5_begin(md5_ctx_t *ctx) FAST_FUNC;
1644void md5_hash(md5_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1645void md5_end(md5_ctx_t *ctx, void *resbuf) FAST_FUNC;
1646void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC;
1647#define sha1_hash md5_hash
1648void sha1_end(sha1_ctx_t *ctx, void *resbuf) FAST_FUNC;
1649void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC;
1650#define sha256_hash md5_hash
1651#define sha256_end sha1_end
1652void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC;
1653void sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1654void sha512_end(sha512_ctx_t *ctx, void *resbuf) FAST_FUNC;
1655void sha3_begin(sha3_ctx_t *ctx) FAST_FUNC;
1656void sha3_hash(sha3_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1657void sha3_end(sha3_ctx_t *ctx, void *resbuf) FAST_FUNC;
1658
1659extern uint32_t *global_crc32_table;
1660uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
1661uint32_t crc32_block_endian1(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1662uint32_t crc32_block_endian0(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1663
1664typedef struct masks_labels_t {
1665 const char *labels;
1666 const int masks[];
1667} masks_labels_t;
1668int print_flags_separated(const int *masks, const char *labels,
1669 int flags, const char *separator) FAST_FUNC;
1670int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
1671
1672typedef struct bb_progress_t {
1673 unsigned last_size;
1674 unsigned last_update_sec;
1675 unsigned last_change_sec;
1676 unsigned start_sec;
1677 const char *curfile;
1678} bb_progress_t;
1679
1680#define is_bb_progress_inited(p) ((p)->curfile != NULL)
1681#define bb_progress_free(p) do { \
1682 if (ENABLE_UNICODE_SUPPORT) free((char*)((p)->curfile)); \
1683 (p)->curfile = NULL; \
1684} while (0)
1685void bb_progress_init(bb_progress_t *p, const char *curfile) FAST_FUNC;
1686void bb_progress_update(bb_progress_t *p,
1687 uoff_t beg_range,
1688 uoff_t transferred,
1689 uoff_t totalsize) FAST_FUNC;
1690
1691
1692extern const char *applet_name;
1693
1694/* Some older linkers don't perform string merging, we used to have common strings
1695 * as global arrays to do it by hand. But:
1696 * (1) newer linkers do it themselves,
1697 * (2) however, they DONT merge string constants with global arrays,
1698 * even if the value is the same (!). Thus global arrays actually
1699 * increased size a bit: for example, "/etc/passwd" string from libc
1700 * wasn't merged with bb_path_passwd_file[] array!
1701 * Therefore now we use #defines.
1702 */
1703/* "BusyBox vN.N.N (timestamp or extra_version)" */
1704extern const char bb_banner[] ALIGN1;
1705extern const char bb_msg_memory_exhausted[] ALIGN1;
1706extern const char bb_msg_invalid_date[] ALIGN1;
1707#define bb_msg_read_error "read error"
1708#define bb_msg_write_error "write error"
1709extern const char bb_msg_unknown[] ALIGN1;
1710extern const char bb_msg_can_not_create_raw_socket[] ALIGN1;
1711extern const char bb_msg_perm_denied_are_you_root[] ALIGN1;
1712extern const char bb_msg_you_must_be_root[] ALIGN1;
1713extern const char bb_msg_requires_arg[] ALIGN1;
1714extern const char bb_msg_invalid_arg[] ALIGN1;
1715extern const char bb_msg_standard_input[] ALIGN1;
1716extern const char bb_msg_standard_output[] ALIGN1;
1717
1718/* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
1719extern const char bb_hexdigits_upcase[] ALIGN1;
1720
1721extern const char bb_path_wtmp_file[] ALIGN1;
1722
1723/* Busybox mount uses either /proc/mounts or /etc/mtab to
1724 * get the list of currently mounted filesystems */
1725#define bb_path_mtab_file IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts")
1726
1727#define bb_path_passwd_file _PATH_PASSWD
1728#define bb_path_group_file _PATH_GROUP
1729#define bb_path_shadow_file _PATH_SHADOW
1730#define bb_path_gshadow_file _PATH_GSHADOW
1731
1732#define bb_path_motd_file "/etc/motd"
1733
1734#define bb_dev_null "/dev/null"
1735extern const char bb_busybox_exec_path[] ALIGN1;
1736/* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
1737 * but I want to save a few bytes here */
1738extern const char bb_PATH_root_path[] ALIGN1; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */
1739#define bb_default_root_path (bb_PATH_root_path + sizeof("PATH"))
1740#define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin"))
1741
1742extern const int const_int_0;
1743extern const int const_int_1;
1744
1745
1746/* Providing hard guarantee on minimum size (think of BUFSIZ == 128) */
1747enum { COMMON_BUFSIZE = (BUFSIZ >= 256*sizeof(void*) ? BUFSIZ+1 : 256*sizeof(void*)) };
1748extern char bb_common_bufsiz1[COMMON_BUFSIZE];
1749/* This struct is deliberately not defined. */
1750/* See docs/keep_data_small.txt */
1751struct globals;
1752/* '*const' ptr makes gcc optimize code much better.
1753 * Magic prevents ptr_to_globals from going into rodata.
1754 * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
1755extern struct globals *const ptr_to_globals;
1756/* At least gcc 3.4.6 on mipsel system needs optimization barrier */
1757#define barrier() __asm__ __volatile__("":::"memory")
1758#define SET_PTR_TO_GLOBALS(x) do { \
1759 (*(struct globals**)&ptr_to_globals) = (void*)(x); \
1760 barrier(); \
1761} while (0)
1762
1763/* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
1764 * use bb_default_login_shell and following defines.
1765 * If you change LIBBB_DEFAULT_LOGIN_SHELL,
1766 * don't forget to change increment constant. */
1767#define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
1768extern const char bb_default_login_shell[] ALIGN1;
1769/* "/bin/sh" */
1770#define DEFAULT_SHELL (bb_default_login_shell+1)
1771/* "sh" */
1772#define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6)
1773
1774/* The following devices are the same on all systems. */
1775#define CURRENT_TTY "/dev/tty"
1776#define DEV_CONSOLE "/dev/console"
1777
1778#if defined(__FreeBSD_kernel__)
1779# define CURRENT_VC CURRENT_TTY
1780# define VC_1 "/dev/ttyv0"
1781# define VC_2 "/dev/ttyv1"
1782# define VC_3 "/dev/ttyv2"
1783# define VC_4 "/dev/ttyv3"
1784# define VC_5 "/dev/ttyv4"
1785# define VC_FORMAT "/dev/ttyv%d"
1786#elif defined(__GNU__)
1787# define CURRENT_VC CURRENT_TTY
1788# define VC_1 "/dev/tty1"
1789# define VC_2 "/dev/tty2"
1790# define VC_3 "/dev/tty3"
1791# define VC_4 "/dev/tty4"
1792# define VC_5 "/dev/tty5"
1793# define VC_FORMAT "/dev/tty%d"
1794#elif ENABLE_FEATURE_DEVFS
1795/*Linux, obsolete devfs names */
1796# define CURRENT_VC "/dev/vc/0"
1797# define VC_1 "/dev/vc/1"
1798# define VC_2 "/dev/vc/2"
1799# define VC_3 "/dev/vc/3"
1800# define VC_4 "/dev/vc/4"
1801# define VC_5 "/dev/vc/5"
1802# define VC_FORMAT "/dev/vc/%d"
1803# define LOOP_FORMAT "/dev/loop/%d"
1804# define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1)
1805# define LOOP_NAME "/dev/loop/"
1806# define FB_0 "/dev/fb/0"
1807#else
1808/*Linux, normal names */
1809# define CURRENT_VC "/dev/tty0"
1810# define VC_1 "/dev/tty1"
1811# define VC_2 "/dev/tty2"
1812# define VC_3 "/dev/tty3"
1813# define VC_4 "/dev/tty4"
1814# define VC_5 "/dev/tty5"
1815# define VC_FORMAT "/dev/tty%d"
1816# define LOOP_FORMAT "/dev/loop%d"
1817# define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1)
1818# define LOOP_NAME "/dev/loop"
1819# define FB_0 "/dev/fb0"
1820#endif
1821
1822
1823#define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
1824
1825
1826/* We redefine ctype macros. Unicode-correct handling of char types
1827 * can't be done with such byte-oriented operations anyway,
1828 * we don't lose anything.
1829 */
1830#undef isalnum
1831#undef isalpha
1832#undef isascii
1833#undef isblank
1834#undef iscntrl
1835#undef isdigit
1836#undef isgraph
1837#undef islower
1838#undef isprint
1839#undef ispunct
1840#undef isspace
1841#undef isupper
1842#undef isxdigit
1843#undef toupper
1844#undef tolower
1845
1846/* We save ~500 bytes on isdigit alone.
1847 * BTW, x86 likes (unsigned char) cast more than (unsigned). */
1848
1849/* These work the same for ASCII and Unicode,
1850 * assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
1851#define isascii(a) ((unsigned char)(a) <= 0x7f)
1852#define isdigit(a) ((unsigned char)((a) - '0') <= 9)
1853#define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
1854#define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
1855#define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
1856#define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
1857#define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
1858/* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
1859 * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
1860 */
1861#define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
1862// Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
1863#define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
1864// Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
1865#define isalnum(a) bb_ascii_isalnum(a)
1866static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
1867{
1868 unsigned char b = a - '0';
1869 if (b <= 9)
1870 return (b <= 9);
1871 b = (a|0x20) - 'a';
1872 return b <= 'z' - 'a';
1873}
1874#define isxdigit(a) bb_ascii_isxdigit(a)
1875static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
1876{
1877 unsigned char b = a - '0';
1878 if (b <= 9)
1879 return (b <= 9);
1880 b = (a|0x20) - 'a';
1881 return b <= 'f' - 'a';
1882}
1883#define toupper(a) bb_ascii_toupper(a)
1884static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
1885{
1886 unsigned char b = a - 'a';
1887 if (b <= ('z' - 'a'))
1888 a -= 'a' - 'A';
1889 return a;
1890}
1891#define tolower(a) bb_ascii_tolower(a)
1892static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
1893{
1894 unsigned char b = a - 'A';
1895 if (b <= ('Z' - 'A'))
1896 a += 'a' - 'A';
1897 return a;
1898}
1899
1900/* In ASCII and Unicode, these are likely to be very different.
1901 * Let's prevent ambiguous usage from the start */
1902#define isgraph(a) isgraph_is_ambiguous_dont_use(a)
1903#define isprint(a) isprint_is_ambiguous_dont_use(a)
1904/* NB: must not treat EOF as isgraph or isprint */
1905#define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
1906#define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
1907
1908
1909POP_SAVED_FUNCTION_VISIBILITY
1910
1911#endif
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