mirror of
https://gitlab.com/sortix/sortix.git
synced 2023-02-13 20:55:38 -05:00
Add kill(1).
This commit is contained in:
Jonas 'Sortie' Termansen
parent
716ac0dceb
commit
4e918687ce
1 changed files with 266 additions and 22 deletions
288
utils/kill.cpp
288
utils/kill.cpp
|
|
@ -1,6 +1,6 @@
|
|||
/*******************************************************************************
|
||||
|
||||
Copyright(C) Jonas 'Sortie' Termansen 2011.
|
||||
Copyright(C) Jonas 'Sortie' Termansen 2015.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify it
|
||||
under the terms of the GNU General Public License as published by the Free
|
||||
|
|
@ -16,47 +16,291 @@
|
|||
this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
kill.cpp
|
||||
Send a signal to a process.
|
||||
Terminate or signal processes.
|
||||
|
||||
*******************************************************************************/
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
#include <ctype.h>
|
||||
#include <locale.h>
|
||||
#include <errno.h>
|
||||
#include <error.h>
|
||||
#include <inttypes.h>
|
||||
#include <signal.h>
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
int help()
|
||||
static const char* signames[128] =
|
||||
{
|
||||
printf("usage: kill [-n] pid ...\n");
|
||||
return 0;
|
||||
[0] = NULL,
|
||||
[SIGHUP] = "HUP",
|
||||
[SIGINT] = "INT",
|
||||
[SIGQUIT] = "QUIT",
|
||||
[SIGILL] = "ILL",
|
||||
[SIGTRAP] = "TRAP",
|
||||
[SIGABRT] = "ABRT",
|
||||
[SIGBUS] = "BUS",
|
||||
[SIGFPE] = "FPE",
|
||||
[SIGKILL] = "KILL",
|
||||
[SIGUSR1] = "USR1",
|
||||
[SIGSEGV] = "SEGV",
|
||||
[SIGUSR2] = "USR2",
|
||||
[SIGPIPE] = "PIPE",
|
||||
[SIGALRM] = "ALRM",
|
||||
[SIGTERM] = "TERM",
|
||||
[SIGSYS] = "SYS",
|
||||
[SIGCHLD] = "CHLD",
|
||||
[SIGCONT] = "CONT",
|
||||
[SIGSTOP] = "STOP",
|
||||
[SIGTSTP] = "TSTP",
|
||||
[SIGTTIN] = "TTIN",
|
||||
[SIGTTOU] = "TTOU",
|
||||
[SIGURG] = "URG",
|
||||
[SIGXCPU] = "XCPU",
|
||||
[SIGXFSZ] = "XFSZ",
|
||||
[SIGVTALRM] = "VTALRM",
|
||||
[SIGPWR] = "PWR",
|
||||
[SIGWINCH] = "WINCH",
|
||||
};
|
||||
|
||||
__attribute__((constructor))
|
||||
static void signames_init()
|
||||
{
|
||||
static char sigrtnames[SIGRTMAX - SIGRTMIN + 1][10];
|
||||
int rtnum = SIGRTMAX - SIGRTMIN + 1;
|
||||
for ( int i = 0; i < rtnum; i++ )
|
||||
{
|
||||
char* name = sigrtnames[i];
|
||||
size_t name_size = sizeof(sigrtnames[i]);
|
||||
if ( i == SIGRTMIN )
|
||||
name = (char*) "RTMIN";
|
||||
else if ( i == SIGRTMIN )
|
||||
name = (char*) "RTMAX";
|
||||
else if ( i < rtnum / 2 )
|
||||
snprintf(name, name_size, "RTMIN+%i", i);
|
||||
else
|
||||
snprintf(name, name_size, "RTMAX-%i", SIGRTMAX - i);
|
||||
signames[SIGRTMIN + i] = name;
|
||||
}
|
||||
}
|
||||
|
||||
static bool parse_signum(int* signumptr, const char* str)
|
||||
{
|
||||
if ( !isdigit((unsigned char) str[0]) )
|
||||
return false;
|
||||
char* end;
|
||||
errno = 0;
|
||||
long l = strtol((char*) str, &end, 10);
|
||||
if ( end[0] )
|
||||
return false;
|
||||
if ( errno == ERANGE || l != (int) l)
|
||||
return false;
|
||||
if ( l < 0 || 128 <= l )
|
||||
return false;
|
||||
*signumptr = (int) l;
|
||||
return true;
|
||||
}
|
||||
|
||||
static pid_t parse_pid(pid_t* pidptr, const char* str)
|
||||
{
|
||||
if ( !isdigit((unsigned char) str[0]) )
|
||||
return false;
|
||||
char* end;
|
||||
errno = 0;
|
||||
intmax_t imax = strtoimax((char*) str, &end, 10);
|
||||
if ( end[0] )
|
||||
return false;
|
||||
if ( errno == ERANGE || imax != (pid_t) imax )
|
||||
return false;
|
||||
*pidptr = (pid_t) imax;
|
||||
return true;
|
||||
}
|
||||
|
||||
static const char* exit_status_to_signame(int status)
|
||||
{
|
||||
if ( 0 <= status && status <= 127 )
|
||||
return signames[status];
|
||||
if ( 128 <= status && status <= 255 )
|
||||
return signames[status - 128];
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int signame_to_signum(const char* name)
|
||||
{
|
||||
int signum;
|
||||
if ( parse_signum(&signum, name) )
|
||||
return signum;
|
||||
for ( int i = 0; i < 128; i++ )
|
||||
if ( signames[i] && !strcmp(signames[i], name) )
|
||||
return i;
|
||||
return -1;
|
||||
}
|
||||
|
||||
static void compact_arguments(int* argc, char*** argv)
|
||||
{
|
||||
for ( int i = 0; i < *argc; i++ )
|
||||
{
|
||||
while ( i < *argc && !(*argv)[i] )
|
||||
{
|
||||
for ( int n = i; n < *argc; n++ )
|
||||
(*argv)[n] = (*argv)[n+1];
|
||||
(*argc)--;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void help(FILE* fp, const char* argv0)
|
||||
{
|
||||
fprintf(fp, "Usage: %s [OPTION]... PID...\n", argv0);
|
||||
fprintf(fp, "Terminate or signal processes by pid.\n");
|
||||
fprintf(fp, "\n");
|
||||
fprintf(fp, " -l, --list list all signal names, or convert one to a name\n");
|
||||
fprintf(fp, " -s, --signal=SIGNAL specify signal to be sent\n");
|
||||
fprintf(fp, " --help display this help and exit\n");
|
||||
fprintf(fp, " --version output version information and exit\n");
|
||||
}
|
||||
|
||||
static void version(FILE* fp, const char* argv0)
|
||||
{
|
||||
fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
|
||||
fprintf(fp, "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
|
||||
fprintf(fp, "This is free software: you are free to change and redistribute it.\n");
|
||||
fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n");
|
||||
}
|
||||
|
||||
int main(int argc, char* argv[])
|
||||
{
|
||||
if ( argc < 2 ) { return help(); }
|
||||
setlocale(LC_ALL, "");
|
||||
|
||||
int first = 1;
|
||||
int signum = SIGTERM;
|
||||
if ( argv[1][0] == '-' )
|
||||
bool list = false;
|
||||
const char* signal = NULL;
|
||||
|
||||
const char* argv0 = argv[0];
|
||||
for ( int i = 1; i < argc; i++ )
|
||||
{
|
||||
signum = atoi(argv[first++]);
|
||||
if ( argc < 3 ) { return help(); }
|
||||
}
|
||||
|
||||
int result = 0;
|
||||
|
||||
for ( int i = first; i < argc; i++ )
|
||||
{
|
||||
pid_t pid = atoi(argv[i]);
|
||||
if ( kill(pid, signum) )
|
||||
const char* arg = argv[i];
|
||||
if ( arg[0] != '-' || !arg[1] )
|
||||
continue;
|
||||
argv[i] = NULL;
|
||||
if ( !strcmp(arg, "--") )
|
||||
break;
|
||||
if ( isupper((unsigned char) arg[1]) ||
|
||||
isdigit((unsigned char) arg[1]) )
|
||||
signal = arg + 1;
|
||||
else if ( arg[1] != '-' )
|
||||
{
|
||||
error(0, errno, "(%ji)", (intmax_t) pid);
|
||||
result |= 1;
|
||||
while ( char c = *++arg ) switch ( c )
|
||||
{
|
||||
case 'l': list = true; break;
|
||||
case 's':
|
||||
if ( !*(signal = arg + 1) )
|
||||
{
|
||||
if ( i + 1 == argc )
|
||||
{
|
||||
error(0, 0, "option requires an argument -- 's'");
|
||||
fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
|
||||
exit(125);
|
||||
}
|
||||
signal = argv[i+1];
|
||||
argv[++i] = NULL;
|
||||
}
|
||||
arg = "s";
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
|
||||
help(stderr, argv0);
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
else if ( !strcmp(arg, "--help") )
|
||||
list = true;
|
||||
else if ( !strncmp(arg, "--signal=", strlen("--signal=")) )
|
||||
signal = arg + strlen("--signal=");
|
||||
else if ( !strcmp(arg, "--signal") )
|
||||
{
|
||||
if ( i + 1 == argc )
|
||||
{
|
||||
error(0, 0, "option '--signal' requires an argument");
|
||||
fprintf(stderr, "Try `%s --help' for more information.\n", argv[0]);
|
||||
exit(125);
|
||||
}
|
||||
signal = argv[i+1];
|
||||
argv[++i] = NULL;
|
||||
}
|
||||
else if ( !strcmp(arg, "--help") )
|
||||
help(stdout, argv0), exit(0);
|
||||
else if ( !strcmp(arg, "--version") )
|
||||
version(stdout, argv0), exit(0);
|
||||
else
|
||||
{
|
||||
fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
|
||||
help(stderr, argv0);
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
|
||||
return result;
|
||||
compact_arguments(&argc, &argv);
|
||||
|
||||
if ( signal && list )
|
||||
error(1, 0, "options --signal and --list are mutually incompatible");
|
||||
|
||||
if ( list && argc == 1 )
|
||||
{
|
||||
const char* prefix = "";
|
||||
for ( int i = 0; i < 128; i++ )
|
||||
{
|
||||
if ( !signames[i] )
|
||||
continue;
|
||||
if ( SIGRTMIN < i && i < SIGRTMAX )
|
||||
continue;
|
||||
printf("%s%s", prefix, signames[i]);
|
||||
prefix = " ";
|
||||
}
|
||||
printf("\n");
|
||||
return ferror(stdout) || fflush(stdout) == EOF ? 1 : 0;
|
||||
}
|
||||
else if ( list )
|
||||
{
|
||||
int result = 0;
|
||||
for ( int i = 1; i < argc; i++ )
|
||||
{
|
||||
int exit_status = atoi(argv[i]);
|
||||
const char* name = exit_status_to_signame(exit_status);
|
||||
if ( name )
|
||||
printf("%s\n", name);
|
||||
else
|
||||
result = 1;
|
||||
}
|
||||
return ferror(stdout) || fflush(stdout) == EOF ? 1 : result;
|
||||
}
|
||||
else
|
||||
{
|
||||
if ( argc == 1)
|
||||
{
|
||||
fprintf(stderr, "%s: missing operand\n", argv0);
|
||||
help(stderr, argv0);
|
||||
exit(1);
|
||||
}
|
||||
if ( !signal )
|
||||
signal = "TERM";
|
||||
int signum = signame_to_signum(signal);
|
||||
if ( signum < 0 )
|
||||
error(1, 0, "invalid signal: %s", signal);
|
||||
int result = 0;
|
||||
for ( int i = 1; i < argc; i++ )
|
||||
{
|
||||
pid_t pid = 0;
|
||||
if ( !parse_pid(&pid, argv[i]) )
|
||||
error(1, 0, "invalid process identifier: %s", argv[i]);
|
||||
if ( kill(pid, signum) < 0 )
|
||||
{
|
||||
error(0, errno, "kill: (%" PRIiPID ")", pid);
|
||||
result = 1;
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue