/* See LICENSE file for copyright and license details. */ #include #include #include #include #include #include #include #include #include struct sig { int signo; const char *name; } sigs[] = { {SIGHUP, "HUP"}, {SIGINT, "INT"}, {SIGQUIT, "QUIT"}, {SIGILL, "ILL"}, {SIGTRAP, "TRAP"}, {SIGABRT, "ABRT"}, {SIGIOT, "IOT"}, {SIGBUS, "BUS"}, {SIGFPE, "FPE"}, {SIGKILL, "KILL"}, {SIGUSR1, "USR1"}, {SIGSEGV, "SEGV"}, {SIGUSR2, "USR2"}, {SIGPIPE, "PIPE"}, {SIGALRM, "ALRM"}, {SIGTERM, "TERM"}, {SIGSTKFLT, "TKFLT"}, {SIGCLD, "CLD"}, {SIGCHLD, "CHLD"}, {SIGCONT, "CONT"}, {SIGSTOP, "STOP"}, {SIGTSTP, "TSTP"}, {SIGTTIN, "TTIN"}, {SIGTTOU, "TTOU"}, {SIGURG, "URG"}, {SIGXCPU, "XCPU"}, {SIGXFSZ, "XFSZ"}, {SIGVTALRM, "VTALRM"}, {SIGPROF, "PROF"}, {SIGWINCH, "WINCH"}, {SIGPOLL, "POLL"}, {SIGIO, "IO"}, {SIGPWR, "PWR"}, {SIGSYS, "SYS"}, {0, NULL} }; const char *argv0; static void usage(void) { fprintf(stderr, "usage: %s (-L | (signal)[(+|-)off] command [argument] ...)\n", argv0); exit(127); } static void invalid_signal(void) { fprintf(stderr, "%s: invalid signal\n", argv0); exit(127); } static void print_signals(void) { struct sig *sig = sigs; for (; sig->name; sig++) printf("%s\n", sig->name); printf("RTMIN\nRTMAX\n"); } static int strict_strtoi(const char *str, int min, int max) { char *end; long int ret; errno = 0; ret = strtol(str, &end, 10); if (errno || *end) usage(); if (ret < min || ret > max) invalid_signal(); return (int)ret; } static int get_signal(const char *str) { struct sig *sig = sigs; int have_prefix = 0; char *end; long int ret; if (!strncasecmp(str, "SIG", 3)) { str += 3; have_prefix = 1; } if (!strcasecmp(str, "RTMIN")) return SIGRTMIN; if (!strcasecmp(str, "RTMAX")) return SIGRTMAX; for (; sig->name; sig++) { if (!strcasecmp(str, sig->name)) return sig->signo; } if (!have_prefix) { errno = 0; ret = strtol(str, &end, 10); if (!errno && !*end && 0 <= ret && ret < _NSIG) return (int)ret; } invalid_signal(); return -1; } int main(int argc, char *argv[]) { char *off; char sign = '\0'; int signo; argv0 = *argv ? (argc--, *argv++) : "pdeath"; if (*argv && **argv == '-') { if (argc == 1 && !strcmp(*argv, "-L")) { print_signals(); if (fflush(stdout) || fclose(stdout)) { perror(argv0); return 127; } return 0; } usage(); } if (argc < 2) usage(); if ((off = strpbrk(*argv, "+-"))) { sign = *off; *off++ = '\0'; } signo = get_signal(*argv); if (sign == '-') signo -= strict_strtoi(off, 0, signo); else if (sign == '+') signo += strict_strtoi(off, 0, _NSIG - 1 - signo); argv++, argc--; if (prctl(PR_SET_PDEATHSIG, signo) == -1) { perror(argv0); return 127; } execvp(*argv, argv); fprintf(stderr, "%s: %s: %s\n", argv0, strerror(errno), *argv); return 127; }