source: branches/3.2/mindi-busybox/libbb/u_signal_names.c @ 3232

Last change on this file since 3232 was 3232, checked in by bruno, 5 years ago
  • Update mindi-busybox to 1.21.1
File size: 4.9 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Signal name/number conversion routines.
4 *
5 * Copyright 2006 Rob Landley <rob@landley.net>
6 *
7 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
8 */
9
10//config:config FEATURE_RTMINMAX
11//config:   bool "Support RTMIN[+n] and RTMAX[-n] signal names"
12//config:   default y
13//config:   help
14//config:     Support RTMIN[+n] and RTMAX[-n] signal names
15//config:     in kill, killall etc. This costs ~250 bytes.
16
17#include "libbb.h"
18
19/* Believe it or not, but some arches have more than 32 SIGs!
20 * HPPA: SIGSTKFLT == 36. */
21
22static const char signals[][7] = {
23    // SUSv3 says kill must support these, and specifies the numerical values,
24    // http://www.opengroup.org/onlinepubs/009695399/utilities/kill.html
25    // {0, "EXIT"}, {1, "HUP"}, {2, "INT"}, {3, "QUIT"},
26    // {6, "ABRT"}, {9, "KILL"}, {14, "ALRM"}, {15, "TERM"}
27    // And Posix adds the following:
28    // {SIGILL, "ILL"}, {SIGTRAP, "TRAP"}, {SIGFPE, "FPE"}, {SIGUSR1, "USR1"},
29    // {SIGSEGV, "SEGV"}, {SIGUSR2, "USR2"}, {SIGPIPE, "PIPE"}, {SIGCHLD, "CHLD"},
30    // {SIGCONT, "CONT"}, {SIGSTOP, "STOP"}, {SIGTSTP, "TSTP"}, {SIGTTIN, "TTIN"},
31    // {SIGTTOU, "TTOU"}
32
33    [0] = "EXIT",
34#ifdef SIGHUP
35    [SIGHUP   ] = "HUP",
36#endif
37#ifdef SIGINT
38    [SIGINT   ] = "INT",
39#endif
40#ifdef SIGQUIT
41    [SIGQUIT  ] = "QUIT",
42#endif
43#ifdef SIGILL
44    [SIGILL   ] = "ILL",
45#endif
46#ifdef SIGTRAP
47    [SIGTRAP  ] = "TRAP",
48#endif
49#ifdef SIGABRT
50    [SIGABRT  ] = "ABRT",
51#endif
52#ifdef SIGBUS
53    [SIGBUS   ] = "BUS",
54#endif
55#ifdef SIGFPE
56    [SIGFPE   ] = "FPE",
57#endif
58#ifdef SIGKILL
59    [SIGKILL  ] = "KILL",
60#endif
61#ifdef SIGUSR1
62    [SIGUSR1  ] = "USR1",
63#endif
64#ifdef SIGSEGV
65    [SIGSEGV  ] = "SEGV",
66#endif
67#ifdef SIGUSR2
68    [SIGUSR2  ] = "USR2",
69#endif
70#ifdef SIGPIPE
71    [SIGPIPE  ] = "PIPE",
72#endif
73#ifdef SIGALRM
74    [SIGALRM  ] = "ALRM",
75#endif
76#ifdef SIGTERM
77    [SIGTERM  ] = "TERM",
78#endif
79#ifdef SIGSTKFLT
80    [SIGSTKFLT] = "STKFLT",
81#endif
82#ifdef SIGCHLD
83    [SIGCHLD  ] = "CHLD",
84#endif
85#ifdef SIGCONT
86    [SIGCONT  ] = "CONT",
87#endif
88#ifdef SIGSTOP
89    [SIGSTOP  ] = "STOP",
90#endif
91#ifdef SIGTSTP
92    [SIGTSTP  ] = "TSTP",
93#endif
94#ifdef SIGTTIN
95    [SIGTTIN  ] = "TTIN",
96#endif
97#ifdef SIGTTOU
98    [SIGTTOU  ] = "TTOU",
99#endif
100#ifdef SIGURG
101    [SIGURG   ] = "URG",
102#endif
103#ifdef SIGXCPU
104    [SIGXCPU  ] = "XCPU",
105#endif
106#ifdef SIGXFSZ
107    [SIGXFSZ  ] = "XFSZ",
108#endif
109#ifdef SIGVTALRM
110    [SIGVTALRM] = "VTALRM",
111#endif
112#ifdef SIGPROF
113    [SIGPROF  ] = "PROF",
114#endif
115#ifdef SIGWINCH
116    [SIGWINCH ] = "WINCH",
117#endif
118#ifdef SIGPOLL
119    [SIGPOLL  ] = "POLL",
120#endif
121#ifdef SIGPWR
122    [SIGPWR   ] = "PWR",
123#endif
124#ifdef SIGSYS
125    [SIGSYS   ] = "SYS",
126#endif
127#if ENABLE_FEATURE_RTMINMAX
128# ifdef __SIGRTMIN
129    [__SIGRTMIN] = "RTMIN",
130# endif
131// This makes array about x2 bigger.
132// More compact approach is to special-case SIGRTMAX in print_signames()
133//# ifdef __SIGRTMAX
134//  [__SIGRTMAX] = "RTMAX",
135//# endif
136#endif
137};
138
139// Convert signal name to number.
140
141int FAST_FUNC get_signum(const char *name)
142{
143    unsigned i;
144
145    i = bb_strtou(name, NULL, 10);
146    if (!errno)
147        return i;
148    if (strncasecmp(name, "SIG", 3) == 0)
149        name += 3;
150    for (i = 0; i < ARRAY_SIZE(signals); i++)
151        if (strcasecmp(name, signals[i]) == 0)
152            return i;
153
154#if ENABLE_DESKTOP
155# if defined(SIGIOT) || defined(SIGIO)
156    /* SIGIO[T] are aliased to other names,
157     * thus cannot be stored in the signals[] array.
158     * Need special code to recognize them */
159    if ((name[0] | 0x20) == 'i' && (name[1] | 0x20) == 'o') {
160#  ifdef SIGIO
161        if (!name[2])
162            return SIGIO;
163#  endif
164#  ifdef SIGIOT
165        if ((name[2] | 0x20) == 't' && !name[3])
166            return SIGIOT;
167#  endif
168    }
169# endif
170#endif
171
172#if ENABLE_FEATURE_RTMINMAX
173# if defined(SIGRTMIN) && defined(SIGRTMAX)
174/* libc may use some rt sigs for pthreads and therefore "remap" SIGRTMIN/MAX,
175 * but we want to use "raw" SIGRTMIN/MAX. Underscored names, if exist, provide
176 * them. If they don't exist, fall back to non-underscored ones: */
177#  if !defined(__SIGRTMIN)
178#   define __SIGRTMIN SIGRTMIN
179#  endif
180#  if !defined(__SIGRTMAX)
181#   define __SIGRTMAX SIGRTMAX
182#  endif
183    if (strncasecmp(name, "RTMIN", 5) == 0) {
184        if (!name[5])
185            return __SIGRTMIN;
186        if (name[5] == '+') {
187            i = bb_strtou(name + 6, NULL, 10);
188            if (!errno && i <= __SIGRTMAX - __SIGRTMIN)
189                return __SIGRTMIN + i;
190        }
191    }
192    else if (strncasecmp(name, "RTMAX", 5) == 0) {
193        if (!name[5])
194            return __SIGRTMAX;
195        if (name[5] == '-') {
196            i = bb_strtou(name + 6, NULL, 10);
197            if (!errno && i <= __SIGRTMAX - __SIGRTMIN)
198                return __SIGRTMAX - i;
199        }
200    }
201# endif
202#endif
203
204    return -1;
205}
206
207// Convert signal number to name
208
209const char* FAST_FUNC get_signame(int number)
210{
211    if ((unsigned)number < ARRAY_SIZE(signals)) {
212        if (signals[number][0]) /* if it's not an empty str */
213            return signals[number];
214    }
215
216    return itoa(number);
217}
218
219
220// Print the whole signal list
221
222void FAST_FUNC print_signames(void)
223{
224    unsigned signo;
225
226    for (signo = 1; signo < ARRAY_SIZE(signals); signo++) {
227        const char *name = signals[signo];
228        if (name[0])
229            printf("%2u) %s\n", signo, name);
230    }
231#if ENABLE_FEATURE_RTMINMAX
232# ifdef __SIGRTMAX
233    printf("%2u) %s\n", __SIGRTMAX, "RTMAX");
234# endif
235#endif
236}
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