I hereby relicense all my work on Sortix under the ISC license as below. All Sortix contributions by other people are already under this license, are not substantial enough to be copyrightable, or have been removed. All imported code from other projects is compatible with this license. All GPL licensed code from other projects had previously been removed. Copyright 2011-2016 Jonas 'Sortie' Termansen and contributors. Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
303 lines
7 KiB
C
303 lines
7 KiB
C
/*
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* Copyright (c) 2015 Jonas 'Sortie' Termansen.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* kill.c
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* Terminate or signal processes.
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*/
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#include <sys/types.h>
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#include <ctype.h>
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#include <errno.h>
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#include <error.h>
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#include <inttypes.h>
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#include <locale.h>
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#include <signal.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static const char* signames[128] =
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{
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[0] = NULL,
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[SIGHUP] = "HUP",
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[SIGINT] = "INT",
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[SIGQUIT] = "QUIT",
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[SIGILL] = "ILL",
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[SIGTRAP] = "TRAP",
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[SIGABRT] = "ABRT",
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[SIGBUS] = "BUS",
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[SIGFPE] = "FPE",
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[SIGKILL] = "KILL",
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[SIGUSR1] = "USR1",
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[SIGSEGV] = "SEGV",
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[SIGUSR2] = "USR2",
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[SIGPIPE] = "PIPE",
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[SIGALRM] = "ALRM",
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[SIGTERM] = "TERM",
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[SIGSYS] = "SYS",
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[SIGCHLD] = "CHLD",
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[SIGCONT] = "CONT",
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[SIGSTOP] = "STOP",
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[SIGTSTP] = "TSTP",
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[SIGTTIN] = "TTIN",
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[SIGTTOU] = "TTOU",
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[SIGURG] = "URG",
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[SIGXCPU] = "XCPU",
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[SIGXFSZ] = "XFSZ",
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[SIGVTALRM] = "VTALRM",
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[SIGPWR] = "PWR",
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[SIGWINCH] = "WINCH",
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};
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__attribute__((constructor))
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static void signames_init(void)
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{
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static char sigrtnames[SIGRTMAX - SIGRTMIN + 1][10];
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int rtnum = SIGRTMAX - SIGRTMIN + 1;
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for ( int i = 0; i < rtnum; i++ )
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{
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char* name = sigrtnames[i];
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size_t name_size = sizeof(sigrtnames[i]);
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if ( i == SIGRTMIN )
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name = (char*) "RTMIN";
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else if ( i == SIGRTMIN )
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name = (char*) "RTMAX";
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else if ( i < rtnum / 2 )
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snprintf(name, name_size, "RTMIN+%i", i);
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else
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snprintf(name, name_size, "RTMAX-%i", SIGRTMAX - i);
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signames[SIGRTMIN + i] = name;
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}
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}
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static bool parse_signum(int* signumptr, const char* str)
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{
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if ( !isdigit((unsigned char) str[0]) )
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return false;
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char* end;
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errno = 0;
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long l = strtol((char*) str, &end, 10);
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if ( end[0] )
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return false;
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if ( errno == ERANGE || l != (int) l)
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return false;
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if ( l < 0 || 128 <= l )
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return false;
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*signumptr = (int) l;
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return true;
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}
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static pid_t parse_pid(pid_t* pidptr, const char* str)
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{
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if ( !isdigit((unsigned char) str[0]) )
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return false;
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char* end;
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errno = 0;
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intmax_t imax = strtoimax((char*) str, &end, 10);
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if ( end[0] )
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return false;
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if ( errno == ERANGE || imax != (pid_t) imax )
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return false;
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*pidptr = (pid_t) imax;
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return true;
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}
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static const char* exit_status_to_signame(int status)
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{
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if ( 0 <= status && status <= 127 )
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return signames[status];
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if ( 128 <= status && status <= 255 )
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return signames[status - 128];
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return NULL;
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}
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static int signame_to_signum(const char* name)
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{
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int signum;
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if ( parse_signum(&signum, name) )
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return signum;
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for ( int i = 0; i < 128; i++ )
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if ( signames[i] && !strcmp(signames[i], name) )
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return i;
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return -1;
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}
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static void compact_arguments(int* argc, char*** argv)
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{
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for ( int i = 0; i < *argc; i++ )
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{
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while ( i < *argc && !(*argv)[i] )
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{
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for ( int n = i; n < *argc; n++ )
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(*argv)[n] = (*argv)[n+1];
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(*argc)--;
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}
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}
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}
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static void help(FILE* fp, const char* argv0)
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{
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fprintf(fp, "Usage: %s [OPTION]... PID...\n", argv0);
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fprintf(fp, "Terminate or signal processes by pid.\n");
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fprintf(fp, "\n");
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fprintf(fp, " -l, --list list all signal names, or convert one to a name\n");
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fprintf(fp, " -s, --signal=SIGNAL specify signal to be sent\n");
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fprintf(fp, " --help display this help and exit\n");
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fprintf(fp, " --version output version information and exit\n");
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}
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static void version(FILE* fp, const char* argv0)
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{
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fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
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}
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int main(int argc, char* argv[])
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{
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setlocale(LC_ALL, "");
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bool list = false;
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const char* signal = NULL;
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const char* argv0 = argv[0];
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for ( int i = 1; i < argc; i++ )
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{
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const char* arg = argv[i];
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if ( arg[0] != '-' || !arg[1] )
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continue;
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argv[i] = NULL;
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if ( !strcmp(arg, "--") )
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break;
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if ( isupper((unsigned char) arg[1]) ||
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isdigit((unsigned char) arg[1]) )
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signal = arg + 1;
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else if ( arg[1] != '-' )
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{
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char c;
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while ( (c = *++arg) ) switch ( c )
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{
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case 'l': list = true; break;
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case 's':
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if ( !*(signal = arg + 1) )
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{
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if ( i + 1 == argc )
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{
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error(0, 0, "option requires an argument -- 's'");
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fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
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exit(125);
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}
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signal = argv[i+1];
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argv[++i] = NULL;
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}
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arg = "s";
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break;
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default:
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fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
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help(stderr, argv0);
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exit(1);
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}
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}
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else if ( !strcmp(arg, "--help") )
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list = true;
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else if ( !strncmp(arg, "--signal=", strlen("--signal=")) )
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signal = arg + strlen("--signal=");
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else if ( !strcmp(arg, "--signal") )
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{
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if ( i + 1 == argc )
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{
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error(0, 0, "option '--signal' requires an argument");
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fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
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exit(125);
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}
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signal = argv[i+1];
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argv[++i] = NULL;
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}
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else if ( !strcmp(arg, "--help") )
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help(stdout, argv0), exit(0);
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else if ( !strcmp(arg, "--version") )
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version(stdout, argv0), exit(0);
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else
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{
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fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
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help(stderr, argv0);
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exit(1);
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}
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}
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compact_arguments(&argc, &argv);
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if ( signal && list )
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error(1, 0, "options --signal and --list are mutually incompatible");
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if ( list && argc == 1 )
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{
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const char* prefix = "";
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for ( int i = 0; i < 128; i++ )
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{
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if ( !signames[i] )
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continue;
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if ( SIGRTMIN < i && i < SIGRTMAX )
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continue;
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printf("%s%s", prefix, signames[i]);
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prefix = " ";
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}
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printf("\n");
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return ferror(stdout) || fflush(stdout) == EOF ? 1 : 0;
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}
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else if ( list )
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{
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int result = 0;
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for ( int i = 1; i < argc; i++ )
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{
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int exit_status = atoi(argv[i]);
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const char* name = exit_status_to_signame(exit_status);
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if ( name )
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printf("%s\n", name);
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else
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result = 1;
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}
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return ferror(stdout) || fflush(stdout) == EOF ? 1 : result;
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}
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else
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{
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if ( argc == 1)
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{
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fprintf(stderr, "%s: missing operand\n", argv0);
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help(stderr, argv0);
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exit(1);
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}
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if ( !signal )
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signal = "TERM";
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int signum = signame_to_signum(signal);
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if ( signum < 0 )
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error(1, 0, "invalid signal: %s", signal);
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int result = 0;
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for ( int i = 1; i < argc; i++ )
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{
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pid_t pid = 0;
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if ( !parse_pid(&pid, argv[i]) )
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error(1, 0, "invalid process identifier: %s", argv[i]);
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if ( kill(pid, signum) < 0 )
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{
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error(0, errno, "kill: (%" PRIiPID ")", pid);
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result = 1;
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}
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}
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return result;
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}
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}
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