| /* |
| * Copyright (c) 1988, 1993, 1994 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| /* |
| * oct 5 1994 -- almost entirely re-written to allow for process names. |
| * modifications (c) salvatore valente <svalente@mit.edu> |
| * may be used / modified / distributed under the same terms as the original. |
| * |
| * 1999-02-22 Arkadiusz MiĆkiewicz <misiek@pld.ORG.PL> |
| * - added Native Language Support |
| * |
| * 1999-11-13 aeb Accept signal numers 128+s. |
| * |
| * Copyright (C) 2014 Sami Kerola <kerolasa@iki.fi> |
| * Copyright (C) 2014 Karel Zak <kzak@redhat.com> |
| */ |
| |
| #include <ctype.h> /* for isdigit() */ |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include "c.h" |
| #include "closestream.h" |
| #include "nls.h" |
| #include "procutils.h" |
| #include "strutils.h" |
| #include "ttyutils.h" |
| #include "xalloc.h" |
| |
| /* partial success, otherwise we return regular EXIT_{SUCCESS,FAILURE} */ |
| #define KILL_EXIT_SOMEOK 64 |
| |
| enum { |
| KILL_FIELD_WIDTH = 11, |
| KILL_OUTPUT_WIDTH = 72 |
| }; |
| |
| struct kill_control { |
| char *arg; |
| pid_t pid; |
| int numsig; |
| #ifdef HAVE_SIGQUEUE |
| union sigval sigdata; |
| #endif |
| unsigned int |
| check_all:1, |
| do_kill:1, |
| do_pid:1, |
| use_sigval:1, |
| verbose:1; |
| }; |
| |
| struct signv { |
| const char *name; |
| int val; |
| } sys_signame[] = { |
| /* POSIX signals */ |
| { "HUP", SIGHUP }, /* 1 */ |
| { "INT", SIGINT }, /* 2 */ |
| { "QUIT", SIGQUIT }, /* 3 */ |
| { "ILL", SIGILL }, /* 4 */ |
| #ifdef SIGTRAP |
| { "TRAP", SIGTRAP }, /* 5 */ |
| #endif |
| { "ABRT", SIGABRT }, /* 6 */ |
| #ifdef SIGIOT |
| { "IOT", SIGIOT }, /* 6, same as SIGABRT */ |
| #endif |
| #ifdef SIGEMT |
| { "EMT", SIGEMT }, /* 7 (mips,alpha,sparc*) */ |
| #endif |
| #ifdef SIGBUS |
| { "BUS", SIGBUS }, /* 7 (arm,i386,m68k,ppc), 10 (mips,alpha,sparc*) */ |
| #endif |
| { "FPE", SIGFPE }, /* 8 */ |
| { "KILL", SIGKILL }, /* 9 */ |
| { "USR1", SIGUSR1 }, /* 10 (arm,i386,m68k,ppc), 30 (alpha,sparc*), 16 (mips) */ |
| { "SEGV", SIGSEGV }, /* 11 */ |
| { "USR2", SIGUSR2 }, /* 12 (arm,i386,m68k,ppc), 31 (alpha,sparc*), 17 (mips) */ |
| { "PIPE", SIGPIPE }, /* 13 */ |
| { "ALRM", SIGALRM }, /* 14 */ |
| { "TERM", SIGTERM }, /* 15 */ |
| #ifdef SIGSTKFLT |
| { "STKFLT", SIGSTKFLT }, /* 16 (arm,i386,m68k,ppc) */ |
| #endif |
| { "CHLD", SIGCHLD }, /* 17 (arm,i386,m68k,ppc), 20 (alpha,sparc*), 18 (mips) */ |
| #ifdef SIGCLD |
| { "CLD", SIGCLD }, /* same as SIGCHLD (mips) */ |
| #endif |
| { "CONT", SIGCONT }, /* 18 (arm,i386,m68k,ppc), 19 (alpha,sparc*), 25 (mips) */ |
| { "STOP", SIGSTOP }, /* 19 (arm,i386,m68k,ppc), 17 (alpha,sparc*), 23 (mips) */ |
| { "TSTP", SIGTSTP }, /* 20 (arm,i386,m68k,ppc), 18 (alpha,sparc*), 24 (mips) */ |
| { "TTIN", SIGTTIN }, /* 21 (arm,i386,m68k,ppc,alpha,sparc*), 26 (mips) */ |
| { "TTOU", SIGTTOU }, /* 22 (arm,i386,m68k,ppc,alpha,sparc*), 27 (mips) */ |
| #ifdef SIGURG |
| { "URG", SIGURG }, /* 23 (arm,i386,m68k,ppc), 16 (alpha,sparc*), 21 (mips) */ |
| #endif |
| #ifdef SIGXCPU |
| { "XCPU", SIGXCPU }, /* 24 (arm,i386,m68k,ppc,alpha,sparc*), 30 (mips) */ |
| #endif |
| #ifdef SIGXFSZ |
| { "XFSZ", SIGXFSZ }, /* 25 (arm,i386,m68k,ppc,alpha,sparc*), 31 (mips) */ |
| #endif |
| #ifdef SIGVTALRM |
| { "VTALRM", SIGVTALRM }, /* 26 (arm,i386,m68k,ppc,alpha,sparc*), 28 (mips) */ |
| #endif |
| #ifdef SIGPROF |
| { "PROF", SIGPROF }, /* 27 (arm,i386,m68k,ppc,alpha,sparc*), 29 (mips) */ |
| #endif |
| #ifdef SIGWINCH |
| { "WINCH", SIGWINCH }, /* 28 (arm,i386,m68k,ppc,alpha,sparc*), 20 (mips) */ |
| #endif |
| #ifdef SIGIO |
| { "IO", SIGIO }, /* 29 (arm,i386,m68k,ppc), 23 (alpha,sparc*), 22 (mips) */ |
| #endif |
| #ifdef SIGPOLL |
| { "POLL", SIGPOLL }, /* same as SIGIO */ |
| #endif |
| #ifdef SIGINFO |
| { "INFO", SIGINFO }, /* 29 (alpha) */ |
| #endif |
| #ifdef SIGLOST |
| { "LOST", SIGLOST }, /* 29 (arm,i386,m68k,ppc,sparc*) */ |
| #endif |
| #ifdef SIGPWR |
| { "PWR", SIGPWR }, /* 30 (arm,i386,m68k,ppc), 29 (alpha,sparc*), 19 (mips) */ |
| #endif |
| #ifdef SIGUNUSED |
| { "UNUSED", SIGUNUSED }, /* 31 (arm,i386,m68k,ppc) */ |
| #endif |
| #ifdef SIGSYS |
| { "SYS", SIGSYS }, /* 31 (mips,alpha,sparc*) */ |
| #endif |
| }; |
| |
| static void print_signal_name(int signum) |
| { |
| size_t n; |
| |
| for (n = 0; n < ARRAY_SIZE(sys_signame); n++) { |
| if (sys_signame[n].val == signum) { |
| printf("%s\n", sys_signame[n].name); |
| return; |
| } |
| } |
| #ifdef SIGRTMIN |
| if (SIGRTMIN <= signum && signum <= SIGRTMAX) { |
| printf("RT%d\n", signum - SIGRTMIN); |
| return; |
| } |
| #endif |
| printf("%d\n", signum); |
| } |
| |
| static void pretty_print_signal(FILE *fp, size_t term_width, size_t *lpos, |
| int signum, const char *name) |
| { |
| if (term_width < (*lpos + KILL_FIELD_WIDTH)) { |
| fputc('\n', fp); |
| *lpos = 0; |
| } |
| *lpos += KILL_FIELD_WIDTH; |
| fprintf(fp, "%2d %-8s", signum, name); |
| } |
| |
| static void print_all_signals(FILE *fp, int pretty) |
| { |
| size_t n, lth, lpos = 0, width; |
| |
| if (!pretty) { |
| for (n = 0; n < ARRAY_SIZE(sys_signame); n++) { |
| lth = 1 + strlen(sys_signame[n].name); |
| if (KILL_OUTPUT_WIDTH < lpos + lth) { |
| fputc('\n', fp); |
| lpos = 0; |
| } else if (lpos) |
| fputc(' ', fp); |
| lpos += lth; |
| fputs(sys_signame[n].name, fp); |
| } |
| #ifdef SIGRTMIN |
| fputs(" RT<N> RTMIN+<N> RTMAX-<N>", fp); |
| #endif |
| fputc('\n', fp); |
| return; |
| } |
| |
| /* pretty print */ |
| width = get_terminal_width(); |
| if (width == 0) |
| width = KILL_OUTPUT_WIDTH; |
| else |
| width -= 1; |
| for (n = 0; n < ARRAY_SIZE(sys_signame); n++) |
| pretty_print_signal(fp, width, &lpos, |
| sys_signame[n].val, sys_signame[n].name); |
| #ifdef SIGRTMIN |
| pretty_print_signal(fp, width, &lpos, SIGRTMIN, "RTMIN"); |
| pretty_print_signal(fp, width, &lpos, SIGRTMAX, "RTMAX"); |
| #endif |
| fputc('\n', fp); |
| } |
| |
| static void err_nosig(char *name) |
| { |
| warnx(_("unknown signal %s; valid signals:"), name); |
| print_all_signals(stderr, 1); |
| exit(EXIT_FAILURE); |
| } |
| |
| #ifdef SIGRTMIN |
| static int rtsig_to_signum(char *sig) |
| { |
| int num, maxi = 0; |
| char *ep = NULL; |
| |
| if (strncasecmp(sig, "min+", 4) == 0) |
| sig += 4; |
| else if (strncasecmp(sig, "max-", 4) == 0) { |
| sig += 4; |
| maxi = 1; |
| } |
| if (!isdigit(*sig)) |
| return -1; |
| errno = 0; |
| num = strtol(sig, &ep, 10); |
| if (!ep || sig == ep || errno || num < 0) |
| return -1; |
| num = maxi ? SIGRTMAX - num : SIGRTMIN + num; |
| if (num < SIGRTMIN || SIGRTMAX < num) |
| return -1; |
| return num; |
| } |
| #endif |
| |
| static int signame_to_signum(char *sig) |
| { |
| size_t n; |
| |
| if (!strncasecmp(sig, "sig", 3)) |
| sig += 3; |
| #ifdef SIGRTMIN |
| /* RT signals */ |
| if (!strncasecmp(sig, "rt", 2)) |
| return rtsig_to_signum(sig + 2); |
| #endif |
| /* Normal sugnals */ |
| for (n = 0; n < ARRAY_SIZE(sys_signame); n++) { |
| if (!strcasecmp(sys_signame[n].name, sig)) |
| return sys_signame[n].val; |
| } |
| return -1; |
| } |
| |
| static int arg_to_signum(char *arg, int maskbit) |
| { |
| int numsig; |
| char *ep; |
| |
| if (isdigit(*arg)) { |
| numsig = strtol(arg, &ep, 10); |
| if (NSIG <= numsig && maskbit && (numsig & 128) != 0) |
| numsig -= 128; |
| if (*ep != 0 || numsig < 0 || NSIG <= numsig) |
| return -1; |
| return numsig; |
| } |
| return signame_to_signum(arg); |
| } |
| |
| static void __attribute__((__noreturn__)) usage(FILE *out) |
| { |
| fputs(USAGE_HEADER, out); |
| fprintf(out, _(" %s [options] <pid>|<name>...\n"), program_invocation_short_name); |
| |
| fputs(USAGE_SEPARATOR, out); |
| fputs(_("Forcibly terminate a process.\n"), out); |
| |
| fputs(USAGE_OPTIONS, out); |
| fputs(_(" -a, --all do not restrict the name-to-pid conversion to processes\n" |
| " with the same uid as the present process\n"), out); |
| fputs(_(" -s, --signal <signal> send this <signal> instead of SIGTERM\n"), out); |
| #ifdef HAVE_SIGQUEUE |
| fputs(_(" -q, --queue <value> use sigqueue(2), not kill(2), and pass <value> as data\n"), out); |
| #endif |
| fputs(_(" -p, --pid print pids without signaling them\n"), out); |
| fputs(_(" -l, --list[=<signal>] list signal names, or convert a signal number to a name\n"), out); |
| fputs(_(" -L, --table list signal names and numbers\n"), out); |
| fputs(_(" --verbose print pids that will be signaled\n"), out); |
| |
| fputs(USAGE_SEPARATOR, out); |
| fputs(USAGE_HELP, out); |
| fputs(USAGE_VERSION, out); |
| fprintf(out, USAGE_MAN_TAIL("kill(1)")); |
| |
| exit(out == stderr ? EXIT_FAILURE : EXIT_SUCCESS); |
| } |
| |
| static char **parse_arguments(int argc, char **argv, struct kill_control *ctl) |
| { |
| char *arg; |
| |
| /* Loop through the arguments. Actually, -a is the only option |
| * can be used with other options. The 'kill' is basically a |
| * one-option-at-most program. */ |
| for (argc--, argv++; 0 < argc; argc--, argv++) { |
| arg = *argv; |
| if (*arg != '-') |
| break; |
| if (!strcmp(arg, "--")) { |
| argc--, argv++; |
| break; |
| } |
| if (!strcmp(arg, "-v") || !strcmp(arg, "-V") || |
| !strcmp(arg, "--version")) { |
| printf(UTIL_LINUX_VERSION); |
| exit(EXIT_SUCCESS); |
| } |
| if (!strcmp(arg, "-h") || !strcmp(arg, "--help")) |
| usage(stdout); |
| if (!strcmp(arg, "--verbose")) { |
| ctl->verbose = 1; |
| continue; |
| } |
| if (!strcmp(arg, "-a") || !strcmp(arg, "--all")) { |
| ctl->check_all = 1; |
| continue; |
| } |
| if (!strcmp(arg, "-l") || !strcmp(arg, "--list")) { |
| if (argc < 2) { |
| print_all_signals(stdout, 0); |
| exit(EXIT_SUCCESS); |
| } |
| if (2 < argc) |
| errx(EXIT_FAILURE, _("too many arguments")); |
| /* argc == 2, accept "kill -l $?" */ |
| arg = argv[1]; |
| if ((ctl->numsig = arg_to_signum(arg, 1)) < 0) |
| errx(EXIT_FAILURE, _("unknown signal: %s"), |
| arg); |
| print_signal_name(ctl->numsig); |
| exit(EXIT_SUCCESS); |
| } |
| /* for compatibility with procps kill(1) */ |
| if (!strncmp(arg, "--list=", 7) || !strncmp(arg, "-l=", 3)) { |
| char *p = strchr(arg, '=') + 1; |
| if ((ctl->numsig = arg_to_signum(p, 1)) < 0) |
| errx(EXIT_FAILURE, _("unknown signal: %s"), p); |
| print_signal_name(ctl->numsig); |
| exit(EXIT_SUCCESS); |
| } |
| if (!strcmp(arg, "-L") || !strcmp(arg, "--table")) { |
| print_all_signals(stdout, 1); |
| exit(EXIT_SUCCESS); |
| } |
| if (!strcmp(arg, "-p") || !strcmp(arg, "--pid")) { |
| ctl->do_pid = 1; |
| if (ctl->do_kill) |
| errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--signal"); |
| #ifdef HAVE_SIGQUEUE |
| if (ctl->use_sigval) |
| errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--queue"); |
| #endif |
| continue; |
| } |
| if (!strcmp(arg, "-s") || !strcmp(arg, "--signal")) { |
| if (argc < 2) |
| errx(EXIT_FAILURE, _("not enough arguments")); |
| ctl->do_kill = 1; |
| if (ctl->do_pid) |
| errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--signal"); |
| argc--, argv++; |
| arg = *argv; |
| if ((ctl->numsig = arg_to_signum(arg, 0)) < 0) |
| err_nosig(arg); |
| continue; |
| } |
| #ifdef HAVE_SIGQUEUE |
| if (!strcmp(arg, "-q") || !strcmp(arg, "--queue")) { |
| if (argc < 2) |
| errx(EXIT_FAILURE, _("option '%s' requires an argument"), arg); |
| if (ctl->do_pid) |
| errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--queue"); |
| argc--, argv++; |
| arg = *argv; |
| ctl->sigdata.sival_int = strtos32_or_err(arg, _("argument error")); |
| ctl->use_sigval = 1; |
| continue; |
| } |
| #endif |
| /* 'arg' begins with a dash but is not a known option. |
| * So it's probably something like -HUP, or -1/-n try to |
| * deal with it. |
| * |
| * -n could be either signal n or pid -n (a process group |
| * number). In case of doubt, POSIX tells us to assume a |
| * signal. But if a signal has already been parsed, then |
| * assume it is a process group, so stop parsing options. */ |
| if (ctl->do_kill) |
| break; |
| arg++; |
| if ((ctl->numsig = arg_to_signum(arg, 0)) < 0) |
| errx(EXIT_FAILURE, _("invalid signal name or number: %s"), arg); |
| ctl->do_kill = 1; |
| if (ctl->do_pid) |
| errx(EXIT_FAILURE, _("%s and %s are mutually exclusive"), "--pid", "--signal"); |
| continue; |
| } |
| if (!*argv) |
| errx(EXIT_FAILURE, _("not enough arguments")); |
| return argv; |
| } |
| |
| |
| static int kill_verbose(const struct kill_control *ctl) |
| { |
| int rc = 0; |
| |
| if (ctl->verbose) |
| printf(_("sending signal %d to pid %d\n"), ctl->numsig, ctl->pid); |
| if (ctl->do_pid) { |
| printf("%ld\n", (long) ctl->pid); |
| return 0; |
| } |
| #ifdef HAVE_SIGQUEUE |
| if (ctl->use_sigval) |
| rc = sigqueue(ctl->pid, ctl->numsig, ctl->sigdata); |
| else |
| #endif |
| rc = kill(ctl->pid, ctl->numsig); |
| |
| if (rc < 0) |
| warn(_("sending signal to %s failed"), ctl->arg); |
| return rc; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| struct kill_control ctl = { .numsig = SIGTERM }; |
| int nerrs = 0, ct = 0; |
| |
| setlocale(LC_ALL, ""); |
| bindtextdomain(PACKAGE, LOCALEDIR); |
| textdomain(PACKAGE); |
| atexit(close_stdout); |
| |
| ctl.do_pid = (!strcmp(program_invocation_short_name, "pid")); /* Yecch */ |
| if (ctl.do_pid) /* FIXME: remove in March 2016. */ |
| warnx(_("use of 'kill --pid' option as command name is deprecated")); |
| |
| argv = parse_arguments(argc, argv, &ctl); |
| |
| /* The rest of the arguments should be process ids and names. */ |
| for ( ; (ctl.arg = *argv) != NULL; argv++) { |
| char *ep = NULL; |
| |
| errno = 0; |
| ctl.pid = strtol(ctl.arg, &ep, 10); |
| if (errno == 0 && ep && *ep == '\0' && ctl.arg < ep) { |
| if (kill_verbose(&ctl) != 0) |
| nerrs++; |
| ct++; |
| } else { |
| struct proc_processes *ps = proc_open_processes(); |
| int found = 0; |
| |
| if (!ps) |
| continue; |
| if (!ctl.check_all) |
| proc_processes_filter_by_uid(ps, getuid()); |
| |
| proc_processes_filter_by_name(ps, ctl.arg); |
| while (proc_next_pid(ps, &ctl.pid) == 0) { |
| if (kill_verbose(&ctl) != 0) |
| nerrs++; |
| ct++; |
| found = 1; |
| } |
| proc_close_processes(ps); |
| |
| if (!found) { |
| nerrs++, ct++; |
| warnx(_("cannot find process \"%s\""), ctl.arg); |
| } |
| } |
| } |
| |
| if (ct && nerrs == 0) |
| return EXIT_SUCCESS; /* full success */ |
| else if (ct == nerrs) |
| return EXIT_FAILURE; /* all failed */ |
| |
| return KILL_EXIT_SOMEOK; /* partial success */ |
| } |
| |