X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=procps%2Fkill.c;h=c5c7a8d7290f7d8798ff071793d7a2a84cb1f944;hb=7f3a2a22569eb8e4c9fcc1c7f4e51fe0c6155dae;hp=ed659afdca0b1a6f822ab2333e6a1852f3b7d864;hpb=6b06cb80be64fcf207bee734cc678c25434ed1a4;p=oweals%2Fbusybox.git diff --git a/procps/kill.c b/procps/kill.c index ed659afdc..c5c7a8d72 100644 --- a/procps/kill.c +++ b/procps/kill.c @@ -5,9 +5,45 @@ * Copyright (C) 1995, 1996 by Bruce Perens . * Copyright (C) 1999-2004 by Erik Andersen * - * Licensed under the GPL v2 or later, see the file LICENSE in this tarball. + * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ +//usage:#define kill_trivial_usage +//usage: "[-l] [-SIG] PID..." +//usage:#define kill_full_usage "\n\n" +//usage: "Send a signal (default: TERM) to given PIDs\n" +//usage: "\n -l List all signal names and numbers" +/* //usage: "\n -s SIG Yet another way of specifying SIG" */ +//usage: +//usage:#define kill_example_usage +//usage: "$ ps | grep apache\n" +//usage: "252 root root S [apache]\n" +//usage: "263 www-data www-data S [apache]\n" +//usage: "264 www-data www-data S [apache]\n" +//usage: "265 www-data www-data S [apache]\n" +//usage: "266 www-data www-data S [apache]\n" +//usage: "267 www-data www-data S [apache]\n" +//usage: "$ kill 252\n" +//usage: +//usage:#define killall_trivial_usage +//usage: "[-l] [-q] [-SIG] PROCESS_NAME..." +//usage:#define killall_full_usage "\n\n" +//usage: "Send a signal (default: TERM) to given processes\n" +//usage: "\n -l List all signal names and numbers" +/* //usage: "\n -s SIG Yet another way of specifying SIG" */ +//usage: "\n -q Don't complain if no processes were killed" +//usage: +//usage:#define killall_example_usage +//usage: "$ killall apache\n" +//usage: +//usage:#define killall5_trivial_usage +//usage: "[-l] [-SIG] [-o PID]..." +//usage:#define killall5_full_usage "\n\n" +//usage: "Send a signal (default: TERM) to all processes outside current session\n" +//usage: "\n -l List all signal names and numbers" +//usage: "\n -o PID Don't signal this PID" +/* //usage: "\n -s SIG Yet another way of specifying SIG" */ + #include "libbb.h" /* Note: kill_main is directly called from shell in order to implement @@ -24,7 +60,7 @@ * This is needed to avoid collision with kill -9 ... syntax */ -int kill_main(int argc, char **argv) +int kill_main(int argc UNUSED_PARAM, char **argv) { char *arg; pid_t pid; @@ -43,10 +79,9 @@ int kill_main(int argc, char **argv) #endif /* Parse any options */ - argc--; arg = *++argv; - if (argc < 1 || arg[0] != '-') { + if (!arg || arg[0] != '-') { goto do_it_now; } @@ -55,13 +90,14 @@ int kill_main(int argc, char **argv) * echo "Died of SIG`kill -l $?`" * We try to mimic what kill from coreutils-6.8 does */ if (arg[1] == 'l' && arg[2] == '\0') { - if (argc == 1) { + arg = *++argv; + if (!arg) { /* Print the whole signal list */ print_signames(); return 0; } /* -l */ - while ((arg = *++argv)) { + do { if (isdigit(arg[0])) { signo = bb_strtou(arg, NULL, 10); if (errno) { @@ -82,8 +118,8 @@ int kill_main(int argc, char **argv) } printf("%d\n", signo); } - } - /* If they specified -l, we are all done */ + arg = *++argv; + } while (arg); return EXIT_SUCCESS; } @@ -91,50 +127,98 @@ int kill_main(int argc, char **argv) if (killall && arg[1] == 'q' && arg[2] == '\0') { quiet = 1; arg = *++argv; - argc--; - if (argc < 1) bb_show_usage(); - if (arg[0] != '-') goto do_it_now; + if (!arg) + bb_show_usage(); + if (arg[0] != '-') + goto do_it_now; } - /* -SIG */ - signo = get_signum(&arg[1]); + arg++; /* skip '-' */ + + /* -o PID? (if present, it always is at the end of command line) */ + if (killall5 && arg[0] == 'o') + goto do_it_now; + + if (argv[1] && arg[0] == 's' && arg[1] == '\0') { /* -s SIG? */ + arg = *++argv; + } /* else it must be -SIG */ + signo = get_signum(arg); if (signo < 0) { /* || signo > MAX_SIGNUM ? */ - bb_error_msg("bad signal name '%s'", &arg[1]); + bb_error_msg("bad signal name '%s'", arg); return EXIT_FAILURE; } arg = *++argv; - argc--; -do_it_now: + do_it_now: pid = getpid(); if (killall5) { pid_t sid; procps_status_t* p = NULL; + /* compat: exitcode 2 is "no one was signaled" */ + int ret = 2; - /* Find out our own session id */ + /* Find out our session id */ sid = getsid(pid); - /* Now stop all processes */ - kill(-1, SIGSTOP); - /* Now kill all processes except our session */ - while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_SID))) { - if (p->sid != (unsigned)sid && p->pid != (unsigned)pid && p->pid != 1) - kill(p->pid, signo); + /* Stop all processes */ + if (signo != SIGSTOP && signo != SIGCONT) + kill(-1, SIGSTOP); + /* Signal all processes except those in our session */ + while ((p = procps_scan(p, PSSCAN_PID|PSSCAN_SID)) != NULL) { + char **args; + + if (p->sid == (unsigned)sid + || p->sid == 0 /* compat: kernel thread, don't signal it */ + || p->pid == (unsigned)pid + || p->pid == 1 + ) { + continue; + } + + /* All remaining args must be -o PID options. + * Check p->pid against them. */ + args = argv; + while (*args) { + pid_t omit; + + arg = *args++; + if (arg[0] != '-' || arg[1] != 'o') { + bb_error_msg("bad option '%s'", arg); + ret = 1; + goto resume; + } + arg += 2; + if (!arg[0] && *args) + arg = *args++; + omit = bb_strtoi(arg, NULL, 10); + if (errno) { + bb_error_msg("invalid number '%s'", arg); + ret = 1; + goto resume; + } + if (p->pid == omit) + goto dont_kill; + } + kill(p->pid, signo); + ret = 0; + dont_kill: ; } + resume: /* And let them continue */ - kill(-1, SIGCONT); - return 0; + if (signo != SIGSTOP && signo != SIGCONT) + kill(-1, SIGCONT); + return ret; } /* Pid or name is required for kill/killall */ - if (argc < 1) { + if (!arg) { bb_error_msg("you need to specify whom to kill"); return EXIT_FAILURE; } if (killall) { /* Looks like they want to do a killall. Do that */ - while (arg) { + do { pid_t* pidList; pidList = find_pid_by_name(arg); @@ -152,28 +236,49 @@ do_it_now: continue; errors++; if (!quiet) - bb_perror_msg("cannot kill pid %u", (unsigned)*pl); + bb_perror_msg("can't kill pid %d", (int)*pl); } } free(pidList); arg = *++argv; - } + } while (arg); return errors; } /* Looks like they want to do a kill. Do that */ while (arg) { - /* Support shell 'space' trick */ - if (arg[0] == ' ') - arg++; +#if ENABLE_ASH || ENABLE_HUSH + /* + * We need to support shell's "hack formats" of + * " -PRGP_ID" (yes, with a leading space) + * and " PID1 PID2 PID3" (with degenerate case "") + */ + while (*arg != '\0') { + char *end; + if (*arg == ' ') + arg++; + pid = bb_strtoi(arg, &end, 10); + if (errno && (errno != EINVAL || *end != ' ')) { + bb_error_msg("invalid number '%s'", arg); + errors++; + break; + } + if (kill(pid, signo) != 0) { + bb_perror_msg("can't kill pid %d", (int)pid); + errors++; + } + arg = end; /* can only point to ' ' or '\0' now */ + } +#else pid = bb_strtoi(arg, NULL, 10); if (errno) { - bb_error_msg("bad pid '%s'", arg); + bb_error_msg("invalid number '%s'", arg); errors++; } else if (kill(pid, signo) != 0) { - bb_perror_msg("cannot kill pid %d", (int)pid); + bb_perror_msg("can't kill pid %d", (int)pid); errors++; } +#endif arg = *++argv; } return errors;