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6dbe3af9 KZ |
1 | /* |
2 | * Copyright (c) 1988, 1993, 1994 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
33 | /* | |
34 | * oct 5 1994 -- almost entirely re-written to allow for process names. | |
35 | * modifications (c) salvatore valente <svalente@mit.edu> | |
36 | * may be used / modified / distributed under the same terms as the original. | |
7eda085c | 37 | * |
b50945d4 | 38 | * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL> |
7eda085c KZ |
39 | * - added Native Language Support |
40 | * | |
9e930041 | 41 | * 1999-11-13 aeb Accept signal numbers 128+s. |
eb63b9b8 | 42 | * |
6853d664 KZ |
43 | * Copyright (C) 2014 Sami Kerola <kerolasa@iki.fi> |
44 | * Copyright (C) 2014 Karel Zak <kzak@redhat.com> | |
6dbe3af9 KZ |
45 | */ |
46 | ||
d4ea8636 SK |
47 | #include <ctype.h> /* for isdigit() */ |
48 | #include <signal.h> | |
6dbe3af9 KZ |
49 | #include <stdio.h> |
50 | #include <stdlib.h> | |
51 | #include <string.h> | |
6dbe3af9 | 52 | #include <unistd.h> |
bf969be7 KZ |
53 | |
54 | #include "c.h" | |
c05a80ca | 55 | #include "closestream.h" |
d4ea8636 | 56 | #include "nls.h" |
f1e7f7d5 | 57 | #include "procutils.h" |
6855f6e8 | 58 | #include "signames.h" |
a1504d8b | 59 | #include "strutils.h" |
fda84b66 SK |
60 | #include "ttyutils.h" |
61 | #include "xalloc.h" | |
6dbe3af9 | 62 | |
a01f4d43 KZ |
63 | /* partial success, otherwise we return regular EXIT_{SUCCESS,FAILURE} */ |
64 | #define KILL_EXIT_SOMEOK 64 | |
65 | ||
6e1bffa8 SK |
66 | enum { |
67 | KILL_FIELD_WIDTH = 11, | |
68 | KILL_OUTPUT_WIDTH = 72 | |
69 | }; | |
70 | ||
2ab6683f SK |
71 | struct kill_control { |
72 | char *arg; | |
73 | pid_t pid; | |
74 | int numsig; | |
9e8dffd5 SK |
75 | #ifdef HAVE_SIGQUEUE |
76 | union sigval sigdata; | |
77 | #endif | |
2ab6683f SK |
78 | unsigned int |
79 | check_all:1, | |
80 | do_kill:1, | |
9e8dffd5 | 81 | do_pid:1, |
d1fd7742 SK |
82 | use_sigval:1, |
83 | verbose:1; | |
2ab6683f SK |
84 | }; |
85 | ||
6ca93313 | 86 | static void print_signal_name(int signum) |
dff74deb | 87 | { |
c61e986f | 88 | const char *name = signum_to_signame(signum); |
6dbe3af9 | 89 | |
c61e986f KZ |
90 | if (name) { |
91 | printf("%s\n", name); | |
92 | return; | |
dff74deb KZ |
93 | } |
94 | #ifdef SIGRTMIN | |
6ca93313 KZ |
95 | if (SIGRTMIN <= signum && signum <= SIGRTMAX) { |
96 | printf("RT%d\n", signum - SIGRTMIN); | |
dff74deb KZ |
97 | return; |
98 | } | |
99 | #endif | |
6ca93313 | 100 | printf("%d\n", signum); |
dff74deb | 101 | } |
a1504d8b | 102 | |
dff74deb KZ |
103 | static void pretty_print_signal(FILE *fp, size_t term_width, size_t *lpos, |
104 | int signum, const char *name) | |
6dbe3af9 | 105 | { |
dff74deb KZ |
106 | if (term_width < (*lpos + KILL_FIELD_WIDTH)) { |
107 | fputc('\n', fp); | |
108 | *lpos = 0; | |
109 | } | |
110 | *lpos += KILL_FIELD_WIDTH; | |
111 | fprintf(fp, "%2d %-8s", signum, name); | |
112 | } | |
d4ea8636 | 113 | |
abc7d9bf | 114 | static void print_all_signals(FILE *fp, int pretty) |
dff74deb KZ |
115 | { |
116 | size_t n, lth, lpos = 0, width; | |
c61e986f KZ |
117 | const char *signame = NULL; |
118 | int signum = 0; | |
d4ea8636 | 119 | |
dff74deb | 120 | if (!pretty) { |
c61e986f KZ |
121 | for (n = 0; get_signame_by_idx(n, &signame, NULL) == 0; n++) { |
122 | lth = 1 + strlen(signame); | |
dff74deb KZ |
123 | if (KILL_OUTPUT_WIDTH < lpos + lth) { |
124 | fputc('\n', fp); | |
125 | lpos = 0; | |
126 | } else if (lpos) | |
127 | fputc(' ', fp); | |
128 | lpos += lth; | |
c61e986f | 129 | fputs(signame, fp); |
dff74deb KZ |
130 | } |
131 | #ifdef SIGRTMIN | |
132 | fputs(" RT<N> RTMIN+<N> RTMAX-<N>", fp); | |
133 | #endif | |
134 | fputc('\n', fp); | |
135 | return; | |
136 | } | |
e497557f | 137 | |
dff74deb | 138 | /* pretty print */ |
43b4f7ea | 139 | width = get_terminal_width(KILL_OUTPUT_WIDTH + 1) - 1; |
c61e986f KZ |
140 | for (n = 0; get_signame_by_idx(n, &signame, &signum) == 0; n++) |
141 | pretty_print_signal(fp, width, &lpos, signum, signame); | |
dff74deb KZ |
142 | #ifdef SIGRTMIN |
143 | pretty_print_signal(fp, width, &lpos, SIGRTMIN, "RTMIN"); | |
144 | pretty_print_signal(fp, width, &lpos, SIGRTMAX, "RTMAX"); | |
145 | #endif | |
146 | fputc('\n', fp); | |
147 | } | |
fd393d2a | 148 | |
e497557f | 149 | static void err_nosig(char *name) |
dff74deb KZ |
150 | { |
151 | warnx(_("unknown signal %s; valid signals:"), name); | |
abc7d9bf | 152 | print_all_signals(stderr, 1); |
e497557f | 153 | exit(EXIT_FAILURE); |
dff74deb | 154 | } |
fd393d2a | 155 | |
dff74deb KZ |
156 | static int arg_to_signum(char *arg, int maskbit) |
157 | { | |
158 | int numsig; | |
159 | char *ep; | |
160 | ||
161 | if (isdigit(*arg)) { | |
162 | numsig = strtol(arg, &ep, 10); | |
163 | if (NSIG <= numsig && maskbit && (numsig & 128) != 0) | |
164 | numsig -= 128; | |
165 | if (*ep != 0 || numsig < 0 || NSIG <= numsig) | |
e497557f KZ |
166 | return -1; |
167 | return numsig; | |
dff74deb KZ |
168 | } |
169 | return signame_to_signum(arg); | |
170 | } | |
171 | ||
86be6a32 | 172 | static void __attribute__((__noreturn__)) usage(void) |
dff74deb | 173 | { |
86be6a32 | 174 | FILE *out = stdout; |
dff74deb | 175 | fputs(USAGE_HEADER, out); |
36a3cd56 | 176 | fprintf(out, _(" %s [options] <pid>|<name>...\n"), program_invocation_short_name); |
e497557f | 177 | |
451dbcfa BS |
178 | fputs(USAGE_SEPARATOR, out); |
179 | fputs(_("Forcibly terminate a process.\n"), out); | |
180 | ||
dff74deb KZ |
181 | fputs(USAGE_OPTIONS, out); |
182 | fputs(_(" -a, --all do not restrict the name-to-pid conversion to processes\n" | |
36a3cd56 BS |
183 | " with the same uid as the present process\n"), out); |
184 | fputs(_(" -s, --signal <signal> send this <signal> instead of SIGTERM\n"), out); | |
dff74deb | 185 | #ifdef HAVE_SIGQUEUE |
36a3cd56 | 186 | fputs(_(" -q, --queue <value> use sigqueue(2), not kill(2), and pass <value> as data\n"), out); |
dff74deb KZ |
187 | #endif |
188 | fputs(_(" -p, --pid print pids without signaling them\n"), out); | |
36a3cd56 | 189 | fputs(_(" -l, --list[=<signal>] list signal names, or convert a signal number to a name\n"), out); |
dff74deb | 190 | fputs(_(" -L, --table list signal names and numbers\n"), out); |
d1fd7742 | 191 | fputs(_(" --verbose print pids that will be signaled\n"), out); |
e497557f | 192 | |
dff74deb | 193 | fputs(USAGE_SEPARATOR, out); |
f45f3ec3 RM |
194 | printf(USAGE_HELP_OPTIONS(24)); |
195 | printf(USAGE_MAN_TAIL("kill(1)")); | |
e497557f | 196 | |
86be6a32 | 197 | exit(EXIT_SUCCESS); |
dff74deb KZ |
198 | } |
199 | ||
fd393d2a SK |
200 | static char **parse_arguments(int argc, char **argv, struct kill_control *ctl) |
201 | { | |
202 | char *arg; | |
203 | ||
d4ea8636 SK |
204 | /* Loop through the arguments. Actually, -a is the only option |
205 | * can be used with other options. The 'kill' is basically a | |
206 | * one-option-at-most program. */ | |
80af5fb0 | 207 | for (argc--, argv++; 0 < argc; argc--, argv++) { |
d4ea8636 SK |
208 | arg = *argv; |
209 | if (*arg != '-') | |
210 | break; | |
211 | if (!strcmp(arg, "--")) { | |
212 | argc--, argv++; | |
213 | break; | |
214 | } | |
215 | if (!strcmp(arg, "-v") || !strcmp(arg, "-V") || | |
2c308875 KZ |
216 | !strcmp(arg, "--version")) |
217 | print_version(EXIT_SUCCESS); | |
d4ea8636 | 218 | if (!strcmp(arg, "-h") || !strcmp(arg, "--help")) |
86be6a32 | 219 | usage(); |
d1fd7742 SK |
220 | if (!strcmp(arg, "--verbose")) { |
221 | ctl->verbose = 1; | |
222 | continue; | |
223 | } | |
d4ea8636 | 224 | if (!strcmp(arg, "-a") || !strcmp(arg, "--all")) { |
fd393d2a | 225 | ctl->check_all = 1; |
d4ea8636 SK |
226 | continue; |
227 | } | |
228 | if (!strcmp(arg, "-l") || !strcmp(arg, "--list")) { | |
229 | if (argc < 2) { | |
abc7d9bf | 230 | print_all_signals(stdout, 0); |
fd393d2a | 231 | exit(EXIT_SUCCESS); |
d4ea8636 | 232 | } |
80af5fb0 | 233 | if (2 < argc) |
d40c87b0 | 234 | errx(EXIT_FAILURE, _("too many arguments")); |
d4ea8636 SK |
235 | /* argc == 2, accept "kill -l $?" */ |
236 | arg = argv[1]; | |
fd393d2a | 237 | if ((ctl->numsig = arg_to_signum(arg, 1)) < 0) |
d4ea8636 SK |
238 | errx(EXIT_FAILURE, _("unknown signal: %s"), |
239 | arg); | |
6ca93313 | 240 | print_signal_name(ctl->numsig); |
fd393d2a | 241 | exit(EXIT_SUCCESS); |
d4ea8636 SK |
242 | } |
243 | /* for compatibility with procps kill(1) */ | |
244 | if (!strncmp(arg, "--list=", 7) || !strncmp(arg, "-l=", 3)) { | |
245 | char *p = strchr(arg, '=') + 1; | |
fd393d2a | 246 | if ((ctl->numsig = arg_to_signum(p, 1)) < 0) |
d4ea8636 | 247 | errx(EXIT_FAILURE, _("unknown signal: %s"), p); |
6ca93313 | 248 | print_signal_name(ctl->numsig); |
fd393d2a | 249 | exit(EXIT_SUCCESS); |
d4ea8636 SK |
250 | } |
251 | if (!strcmp(arg, "-L") || !strcmp(arg, "--table")) { | |
abc7d9bf | 252 | print_all_signals(stdout, 1); |
fd393d2a | 253 | exit(EXIT_SUCCESS); |
d4ea8636 SK |
254 | } |
255 | if (!strcmp(arg, "-p") || !strcmp(arg, "--pid")) { | |
fd393d2a SK |
256 | ctl->do_pid = 1; |
257 | if (ctl->do_kill) | |
d40c87b0 | 258 | errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--signal"); |
fe6b5e32 SK |
259 | #ifdef HAVE_SIGQUEUE |
260 | if (ctl->use_sigval) | |
261 | errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--queue"); | |
262 | #endif | |
d4ea8636 SK |
263 | continue; |
264 | } | |
265 | if (!strcmp(arg, "-s") || !strcmp(arg, "--signal")) { | |
266 | if (argc < 2) | |
d40c87b0 | 267 | errx(EXIT_FAILURE, _("not enough arguments")); |
fd393d2a SK |
268 | ctl->do_kill = 1; |
269 | if (ctl->do_pid) | |
d40c87b0 | 270 | errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--signal"); |
d4ea8636 SK |
271 | argc--, argv++; |
272 | arg = *argv; | |
e497557f KZ |
273 | if ((ctl->numsig = arg_to_signum(arg, 0)) < 0) |
274 | err_nosig(arg); | |
d4ea8636 SK |
275 | continue; |
276 | } | |
9e8dffd5 | 277 | #ifdef HAVE_SIGQUEUE |
d4ea8636 SK |
278 | if (!strcmp(arg, "-q") || !strcmp(arg, "--queue")) { |
279 | if (argc < 2) | |
d40c87b0 | 280 | errx(EXIT_FAILURE, _("option '%s' requires an argument"), arg); |
fe6b5e32 SK |
281 | if (ctl->do_pid) |
282 | errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--queue"); | |
d4ea8636 SK |
283 | argc--, argv++; |
284 | arg = *argv; | |
a3443c30 | 285 | ctl->sigdata.sival_int = strtos32_or_err(arg, _("argument error")); |
9e8dffd5 | 286 | ctl->use_sigval = 1; |
d4ea8636 SK |
287 | continue; |
288 | } | |
9e8dffd5 | 289 | #endif |
d4ea8636 SK |
290 | /* 'arg' begins with a dash but is not a known option. |
291 | * So it's probably something like -HUP, or -1/-n try to | |
292 | * deal with it. | |
293 | * | |
36a3cd56 BS |
294 | * -n could be either signal n or pid -n (a process group |
295 | * number). In case of doubt, POSIX tells us to assume a | |
296 | * signal. But if a signal has already been parsed, then | |
297 | * assume it is a process group, so stop parsing options. */ | |
fd393d2a | 298 | if (ctl->do_kill) |
d4ea8636 SK |
299 | break; |
300 | arg++; | |
fd393d2a | 301 | if ((ctl->numsig = arg_to_signum(arg, 0)) < 0) |
36a3cd56 | 302 | errx(EXIT_FAILURE, _("invalid signal name or number: %s"), arg); |
fd393d2a SK |
303 | ctl->do_kill = 1; |
304 | if (ctl->do_pid) | |
d40c87b0 | 305 | errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--signal"); |
d4ea8636 | 306 | continue; |
6dbe3af9 | 307 | } |
d4ea8636 | 308 | if (!*argv) |
d40c87b0 | 309 | errx(EXIT_FAILURE, _("not enough arguments")); |
fd393d2a | 310 | return argv; |
6dbe3af9 KZ |
311 | } |
312 | ||
6dbe3af9 | 313 | |
2ab6683f | 314 | static int kill_verbose(const struct kill_control *ctl) |
6dbe3af9 | 315 | { |
d4ea8636 | 316 | int rc = 0; |
a1504d8b | 317 | |
d1fd7742 SK |
318 | if (ctl->verbose) |
319 | printf(_("sending signal %d to pid %d\n"), ctl->numsig, ctl->pid); | |
3665b07c | 320 | if (ctl->do_pid) { |
2ab6683f | 321 | printf("%ld\n", (long) ctl->pid); |
d4ea8636 SK |
322 | return 0; |
323 | } | |
a1504d8b | 324 | #ifdef HAVE_SIGQUEUE |
9e8dffd5 SK |
325 | if (ctl->use_sigval) |
326 | rc = sigqueue(ctl->pid, ctl->numsig, ctl->sigdata); | |
d4ea8636 | 327 | else |
a1504d8b | 328 | #endif |
2ab6683f | 329 | rc = kill(ctl->pid, ctl->numsig); |
a01f4d43 KZ |
330 | |
331 | if (rc < 0) | |
2ab6683f | 332 | warn(_("sending signal to %s failed"), ctl->arg); |
a01f4d43 | 333 | return rc; |
6dbe3af9 | 334 | } |
dff74deb KZ |
335 | |
336 | int main(int argc, char **argv) | |
337 | { | |
a01f4d43 KZ |
338 | struct kill_control ctl = { .numsig = SIGTERM }; |
339 | int nerrs = 0, ct = 0; | |
dff74deb KZ |
340 | |
341 | setlocale(LC_ALL, ""); | |
342 | bindtextdomain(PACKAGE, LOCALEDIR); | |
343 | textdomain(PACKAGE); | |
2c308875 | 344 | close_stdout_atexit(); |
dff74deb | 345 | |
dff74deb | 346 | argv = parse_arguments(argc, argv, &ctl); |
dff74deb | 347 | |
a01f4d43 KZ |
348 | /* The rest of the arguments should be process ids and names. */ |
349 | for ( ; (ctl.arg = *argv) != NULL; argv++) { | |
350 | char *ep = NULL; | |
351 | ||
352 | errno = 0; | |
dff74deb | 353 | ctl.pid = strtol(ctl.arg, &ep, 10); |
a01f4d43 KZ |
354 | if (errno == 0 && ep && *ep == '\0' && ctl.arg < ep) { |
355 | if (kill_verbose(&ctl) != 0) | |
356 | nerrs++; | |
357 | ct++; | |
358 | } else { | |
dff74deb | 359 | struct proc_processes *ps = proc_open_processes(); |
a01f4d43 | 360 | int found = 0; |
dff74deb KZ |
361 | |
362 | if (!ps) | |
363 | continue; | |
e0d46757 | 364 | if (!ctl.check_all) |
dff74deb | 365 | proc_processes_filter_by_uid(ps, getuid()); |
a01f4d43 | 366 | |
dff74deb | 367 | proc_processes_filter_by_name(ps, ctl.arg); |
a01f4d43 KZ |
368 | while (proc_next_pid(ps, &ctl.pid) == 0) { |
369 | if (kill_verbose(&ctl) != 0) | |
370 | nerrs++; | |
dff74deb | 371 | ct++; |
a01f4d43 | 372 | found = 1; |
dff74deb KZ |
373 | } |
374 | proc_close_processes(ps); | |
a01f4d43 KZ |
375 | |
376 | if (!found) { | |
377 | nerrs++, ct++; | |
09af3db4 | 378 | warnx(_("cannot find process \"%s\""), ctl.arg); |
a01f4d43 | 379 | } |
dff74deb KZ |
380 | } |
381 | } | |
a01f4d43 KZ |
382 | |
383 | if (ct && nerrs == 0) | |
384 | return EXIT_SUCCESS; /* full success */ | |
385 | else if (ct == nerrs) | |
386 | return EXIT_FAILURE; /* all failed */ | |
387 | ||
388 | return KILL_EXIT_SOMEOK; /* partial success */ | |
dff74deb KZ |
389 | } |
390 |