source: MondoRescue/branches/stable/mindi-busybox/debianutils/start_stop_daemon.c @ 1770

Last change on this file since 1770 was 1770, checked in by Bruno Cornec, 12 years ago
  • Better output for mindi-busybox revision
  • Remove dummy file created on NFS - report from Arnaud Tiger <arnaud.tiger_at_hp.com>
  • strace useful for debug
  • fix new versions for pb (2.0.0 for mindi and 1.7.2 for mindi-busybox)
  • fix build process for mindi-busybox + options used in that version (dd for label-partitions-as-necessary)
  • fix typo in label-partitions-as-necessary which doesn't seem to work
  • Update to busybox 1.7.2
  • perl is now required at restore time to support uuid swap partitions (and will be used for many other thigs

in the future for sure)

  • next mindi version will be 2.0.0 due to all the changes made in it (udev may break working distros)
  • small optimization in mindi on keyboard handling (one single find instead of multiple)
  • better interaction for USB device when launching mindi manually
  • attempt to automatically guess block disk size for ramdisk
  • fix typos in bkphw
  • Fix the remaining problem with UUID support for swap partitions
  • Updates mondoarchive man page for USB support
  • Adds preliminary Hardware support to mindi (Proliant SSSTK)
  • Tries to add udev support also for rhel4
  • Fix UUID support which was still broken.
  • Be conservative in test for the start-nfs script
  • Update config file for mindi-busybox for 1.7.2 migration
  • Try to run around a busybox bug (1.2.2 pb on inexistant links)
  • Add build content for mindi-busybox in pb
  • Remove distributions content for mindi-busybox
  • Fix a warning on inexistant raidtab
  • Solve problem on tmpfs in restore init (Problem of inexistant symlink and busybox)
  • Create MONDO_CACHE and use it everywhere + creation at start
  • Really never try to eject a USB device
  • Fix a issue with &> usage (replaced with 1> and 2>)
  • Adds magic file to depllist in order to have file working + ldd which helps for debugging issues
  • tty modes correct to avoid sh error messages
  • Use ext3 normally and not ext2 instead
  • USB device should be corrected after reading (take 1st part)
  • Adds a mount_USB_here function derived from mount_CDROM_here
  • usb detection place before /dev detection in device name at restore time
  • Fix when restoring from USB: media is asked in interactive mode
  • Adds USB support for mondorestore
  • mount_cdrom => mount_media
  • elilo.efi is now searched throughout /boot/efi and not in a fixed place as there is no standard
  • untar-and-softlink => untar (+ interface change)
  • suppress useless softlinks creation/removal in boot process
  • avoids udevd messages on groups
  • Increase # of disks to 99 as in mindi at restore time (should be a conf file parameter)
  • skip existing big file creation
  • seems to work correctly for USB mindi boot
  • Adds group and tty link to udev conf
  • Always load usb-torage (even 2.6) to initiate USB bus discovery
  • Better printing of messages
  • Attempt to fix a bug in supporting OpenSusE 10.3 kernel for initramfs (mindi may now use multiple regex for kernel initrd detection)
  • Links were not correctly done as non relative for modules in mindi
  • exclusion of modules denied now works
  • Also create modules in their ordinary place, so that classical modprobe works + copy modules.dep
  • Fix bugs for DENY_MODS handling
  • Add device /dev/console for udev
  • ide-generic should now really be excluded
  • Fix a bug in major number for tty
  • If udev then adds modprobe/insmod to rootfs
  • tty0 is also cretaed with udev
  • ide-generic put rather in DENY_MODS
  • udevd remove from deplist s handled in mindi directly
  • better default for mindi when using --usb
  • Handles dynamically linked busybox (in case we want to use it soon ;-)
  • Adds fixed devices to create for udev
  • ide-generic should not be part of the initrd when using libata v2
  • support a dynamically linked udev (case on Ubuntu 7.10 and Mandriva 2008.0 so should be quite generic) This will give incitation to move to dyn. linked binaries in the initrd which will help for other tasks (ia6 4)
  • Improvement in udev support (do not use cl options not available in busybox)
  • Udev in mindi
    • auto creation of the right links at boot time with udev-links.conf(from Mandriva 2008.0)
    • rework startup of udev as current makes kernel crash (from Mandriva 2008.0)
    • add support for 64 bits udev
  • Try to render MyInsmod? silent at boot time
  • Adds udev support (mandatory for newest distributions to avoid remapping of devices in a different way as on the original system)
  • We also need vaft format support for USB boot
  • Adds libusual support (Ubuntu 7.10 needs it for USB)
  • Improve Ubuntu/Debian? keyboard detection and support
  • pbinit adapted to new pb (0.8.10). Filtering of docs done in it
  • Suppress some mondo warnings and errors on USB again
  • Tries to fix lack of files in deb mindi package
  • Verify should now work for USB devices
  • More log/mesages improvement for USB support
  • - Supress g_erase_tmpdir_and_scratchdir
  • Improve some log messages for USB support
  • Try to improve install in mindi to avoid issues with isolinux.cfg not installed vene if in the pkg :-(
  • Improve mindi-busybox build
  • In conformity with pb 0.8.9
  • Add support for Ubuntu 7.10 in build process
  • Add USB Key button to Menu UI (CD streamer removed)
  • Attempt to fix error messages on tmp/scratch files at the end by removing those dir at the latest possible.
  • Fix a bug linked to the size of the -E param which could be used (Arnaud Tiger/René? Ribaud).
  • Integrate ~/.pbrc content into mondorescue.pb (required project-builder >= 0.8.7)
  • Put mondorescue in conformity with new pb filtering rules
  • Add USB support at restore time (no test done yet). New start-usb script PB varibale added where useful
  • Unmounting USB device before removal of temporary scratchdir
  • Stil refining USB copy back to mondo (one command was not executed)
  • No need to have the image subdor in the csratchdir when USB.
  • umount the USB partition before attempting to use it
  • Remove useless copy from mindi to mondo at end of USB handling

(risky merge, we are raising the limits of 2 diverging branches. The status of stable is not completely sure as such. Will need lots of tests, but it's not yet done :-()
(merge -r1692:1769 $SVN_M/branches/2.2.5)

File size: 7.9 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Mini start-stop-daemon implementation(s) for busybox
4 *
5 * Written by Marek Michalkiewicz <marekm@i17linuxb.ists.pwr.wroc.pl>,
6 * Adapted for busybox David Kimdon <dwhedon@gordian.com>
7 *
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
9 */
10
11/* NB: we have a problem here with /proc/NN/exe usage, similar to
12 * one fixed in killall/pidof */
13
14#include <getopt.h>
15#include <sys/resource.h>
16
17/* Override ENABLE_FEATURE_PIDFILE */
18#define WANT_PIDFILE 1
19#include "libbb.h"
20
21static int signal_nr = 15;
22static int user_id = -1;
23static char *userspec;
24static char *cmdname;
25static char *execname;
26static char *pidfile;
27static smallint quiet;
28
29struct pid_list {
30    struct pid_list *next;
31    pid_t pid;
32};
33
34static struct pid_list *found;
35
36static int pid_is_exec(pid_t pid, const char *name)
37{
38    char buf[sizeof("/proc//exe") + sizeof(int)*3];
39    char *execbuf;
40    int n;
41
42    sprintf(buf, "/proc/%u/exe", pid);
43    n = strlen(name) + 1;
44    execbuf = xzalloc(n + 1);
45    readlink(buf, execbuf, n);
46
47    /* if readlink fails, execbuf still contains "" */
48    n = strcmp(execbuf, name);
49    if (ENABLE_FEATURE_CLEAN_UP)
50        free(execbuf);
51    return !n; /* nonzero (true) if execbuf == name */
52}
53
54static int pid_is_user(int pid, int uid)
55{
56    struct stat sb;
57    char buf[sizeof("/proc/") + sizeof(int)*3];
58
59    sprintf(buf, "/proc/%u", pid);
60    if (stat(buf, &sb) != 0)
61        return 0;
62    return (sb.st_uid == uid);
63}
64
65static int pid_is_cmd(pid_t pid, const char *name)
66{
67    char fname[sizeof("/proc//stat") + sizeof(int)*3];
68    char *buf;
69    int r = 0;
70
71    sprintf(fname, "/proc/%u/stat", pid);
72    buf = xmalloc_open_read_close(fname, NULL);
73    if (buf) {
74        char *p = strchr(buf, '(');
75        if (p) {
76            char *pe = strrchr(++p, ')');
77            if (pe) {
78                *pe = '\0';
79                r = !strcmp(p, name);
80            }
81        }
82        free(buf);
83    }
84    return r;
85}
86
87static void check(int pid)
88{
89    struct pid_list *p;
90
91    if (execname && !pid_is_exec(pid, execname)) {
92        return;
93    }
94    if (userspec && !pid_is_user(pid, user_id)) {
95        return;
96    }
97    if (cmdname && !pid_is_cmd(pid, cmdname)) {
98        return;
99    }
100    p = xmalloc(sizeof(*p));
101    p->next = found;
102    p->pid = pid;
103    found = p;
104}
105
106static void do_pidfile(void)
107{
108    FILE *f;
109    unsigned pid;
110
111    f = fopen(pidfile, "r");
112    if (f) {
113        if (fscanf(f, "%u", &pid) == 1)
114            check(pid);
115        fclose(f);
116    } else if (errno != ENOENT)
117        bb_perror_msg_and_die("open pidfile %s", pidfile);
118}
119
120static void do_procinit(void)
121{
122    DIR *procdir;
123    struct dirent *entry;
124    int foundany, pid;
125
126    if (pidfile) {
127        do_pidfile();
128        return;
129    }
130
131    procdir = xopendir("/proc");
132
133    foundany = 0;
134    while ((entry = readdir(procdir)) != NULL) {
135        pid = bb_strtou(entry->d_name, NULL, 10);
136        if (errno)
137            continue;
138        foundany++;
139        check(pid);
140    }
141    closedir(procdir);
142    if (!foundany)
143        bb_error_msg_and_die("nothing in /proc - not mounted?");
144}
145
146static int do_stop(void)
147{
148    char *what;
149    struct pid_list *p;
150    int killed = 0;
151
152    do_procinit();
153
154    if (cmdname) {
155        if (ENABLE_FEATURE_CLEAN_UP) what = xstrdup(cmdname);
156        if (!ENABLE_FEATURE_CLEAN_UP) what = cmdname;
157    } else if (execname) {
158        if (ENABLE_FEATURE_CLEAN_UP) what = xstrdup(execname);
159        if (!ENABLE_FEATURE_CLEAN_UP) what = execname;
160    } else if (pidfile)
161        what = xasprintf("process in pidfile '%s'", pidfile);
162    else if (userspec)
163        what = xasprintf("process(es) owned by '%s'", userspec);
164    else
165        bb_error_msg_and_die("internal error, please report");
166
167    if (!found) {
168        if (!quiet)
169            printf("no %s found; none killed\n", what);
170        killed = -1;
171        goto ret;
172    }
173    for (p = found; p; p = p->next) {
174        if (kill(p->pid, signal_nr) == 0) {
175            p->pid = - p->pid;
176            killed++;
177        } else {
178            bb_perror_msg("warning: killing process %u", p->pid);
179        }
180    }
181    if (!quiet && killed) {
182        printf("stopped %s (pid", what);
183        for (p = found; p; p = p->next)
184            if (p->pid < 0)
185                printf(" %u", - p->pid);
186        puts(")");
187    }
188 ret:
189    if (ENABLE_FEATURE_CLEAN_UP)
190        free(what);
191    return killed;
192}
193
194#if ENABLE_FEATURE_START_STOP_DAEMON_LONG_OPTIONS
195static const char start_stop_daemon_longopts[] ALIGN1 =
196    "stop\0"         No_argument       "K"
197    "start\0"        No_argument       "S"
198    "background\0"   No_argument       "b"
199    "quiet\0"        No_argument       "q"
200    "make-pidfile\0" No_argument       "m"
201#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
202    "oknodo\0"       No_argument       "o"
203    "verbose\0"      No_argument       "v"
204    "nicelevel\0"    Required_argument "N"
205#endif
206    "startas\0"      Required_argument "a"
207    "name\0"         Required_argument "n"
208    "signal\0"       Required_argument "s"
209    "user\0"         Required_argument "u"
210    "chuid\0"        Required_argument "c"
211    "exec\0"         Required_argument "x"
212    "pidfile\0"      Required_argument "p"
213#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
214    "retry\0"        Required_argument "R"
215#endif
216    ;
217#endif
218
219enum {
220    CTX_STOP       = 0x1,
221    CTX_START      = 0x2,
222    OPT_BACKGROUND = 0x4, // -b
223    OPT_QUIET      = 0x8, // -q
224    OPT_MAKEPID    = 0x10, // -m
225    OPT_a          = 0x20, // -a
226    OPT_n          = 0x40, // -n
227    OPT_s          = 0x80, // -s
228    OPT_u          = 0x100, // -u
229    OPT_c          = 0x200, // -c
230    OPT_x          = 0x400, // -x
231    OPT_p          = 0x800, // -p
232    OPT_OKNODO     = 0x1000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -o
233    OPT_VERBOSE    = 0x2000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -v
234    OPT_NICELEVEL  = 0x4000 * ENABLE_FEATURE_START_STOP_DAEMON_FANCY, // -N
235};
236
237int start_stop_daemon_main(int argc, char **argv);
238int start_stop_daemon_main(int argc, char **argv)
239{
240    unsigned opt;
241    char *signame;
242    char *startas;
243    char *chuid;
244#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
245//  char *retry_arg = NULL;
246//  int retries = -1;
247    char *opt_N;
248#endif
249#if ENABLE_FEATURE_START_STOP_DAEMON_LONG_OPTIONS
250    applet_long_options = start_stop_daemon_longopts;
251#endif
252
253    /* Check required one context option was given */
254    opt_complementary = "K:S:K--S:S--K:m?p:K?xpun:S?xa";
255    opt = getopt32(argv, "KSbqma:n:s:u:c:x:p:"
256        USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:"),
257//      USE_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:"),
258        &startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile
259        USE_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)
260//      USE_FEATURE_START_STOP_DAEMON_FANCY(,&retry_arg)
261    );
262
263    quiet = (opt & OPT_QUIET) && !(opt & OPT_VERBOSE);
264
265    if (opt & OPT_s) {
266        signal_nr = get_signum(signame);
267        if (signal_nr < 0) bb_show_usage();
268    }
269
270    if (!(opt & OPT_a))
271        startas = execname;
272
273//  USE_FEATURE_START_STOP_DAEMON_FANCY(
274//      if (retry_arg)
275//          retries = xatoi_u(retry_arg);
276//  )
277    argc -= optind;
278    argv += optind;
279
280    if (userspec) {
281        user_id = bb_strtou(userspec, NULL, 10);
282        if (errno)
283            user_id = xuname2uid(userspec);
284    }
285
286    if (opt & CTX_STOP) {
287        int i = do_stop();
288        return (opt & OPT_OKNODO) ? 0 : (i <= 0);
289    }
290
291    do_procinit();
292
293    if (found) {
294        if (!quiet)
295            printf("%s already running\n%d\n", execname, found->pid);
296        return !(opt & OPT_OKNODO);
297    }
298    *--argv = startas;
299    if (opt & OPT_BACKGROUND) {
300#if BB_MMU
301        bb_daemonize(0);
302#else
303        pid_t pid = vfork();
304        if (pid < 0) /* error */
305            bb_perror_msg_and_die("vfork");
306        if (pid != 0) {
307            /* parent */
308            /* why _exit? the child may have changed the stack,
309             * so "return 0" may do bad things */
310            _exit(0);
311        }
312        /* child */
313        setsid(); /* detach from controlling tty */
314        /* Redirect stdio to /dev/null, close extra FDs.
315         * We do not actually daemonize because of DAEMON_ONLY_SANITIZE */
316        bb_daemonize_or_rexec(
317            DAEMON_DEVNULL_STDIO
318            + DAEMON_CLOSE_EXTRA_FDS
319            + DAEMON_ONLY_SANITIZE,
320            NULL /* argv, unused */ );
321#endif
322    }
323    if (opt & OPT_MAKEPID) {
324        /* user wants _us_ to make the pidfile */
325        write_pidfile(pidfile);
326    }
327    if (opt & OPT_c) {
328        struct bb_uidgid_t ugid;
329        parse_chown_usergroup_or_die(&ugid, chuid);
330        if (ugid.gid != (gid_t) -1) xsetgid(ugid.gid);
331        if (ugid.uid != (uid_t) -1) xsetuid(ugid.uid);
332    }
333#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
334    if (opt & OPT_NICELEVEL) {
335        /* Set process priority */
336        int prio = getpriority(PRIO_PROCESS, 0) + xatoi_range(opt_N, INT_MIN/2, INT_MAX/2);
337        if (setpriority(PRIO_PROCESS, 0, prio) < 0) {
338            bb_perror_msg_and_die("setpriority(%d)", prio);
339        }
340    }
341#endif
342    execv(startas, argv);
343    bb_perror_msg_and_die("cannot start %s", startas);
344}
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