* modifications (c) salvatore valente <svalente@mit.edu>
* may be used / modified / distributed under the same terms as the original.
*
- * 1999-02-22 Arkadiusz Mi¶kiewicz <misiek@pld.ORG.PL>
+ * 1999-02-22 Arkadiusz Miśkiewicz <misiek@pld.ORG.PL>
* - added Native Language Support
*
- * 1999-11-13 aeb Accept signal numers 128+s.
+ * 1999-11-13 aeb Accept signal numbers 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 <strings.h>
-#include <ctype.h> /* for isdigit() */
#include <unistd.h>
-#include <signal.h>
-#include "kill.h"
+
+#include "c.h"
+#include "closestream.h"
#include "nls.h"
+#include "pidfd-utils.h"
+#include "procfs.h"
+#include "pathnames.h"
+#include "signames.h"
+#include "strutils.h"
+#include "ttyutils.h"
+#include "xalloc.h"
+#include "fileutils.h"
-#define SIZE(a) (sizeof(a)/sizeof(a[0]))
-
-struct signv {
- char *name;
- int val;
-} sys_signame[] = {
- /* POSIX signals */
- { "HUP", SIGHUP }, /* 1 */
- { "INT", SIGINT }, /* 2 */
- { "QUIT", SIGQUIT }, /* 3 */
- { "ILL", SIGILL }, /* 4 */
- { "ABRT", SIGABRT }, /* 6 */
- { "FPE", SIGFPE }, /* 8 */
- { "KILL", SIGKILL }, /* 9 */
- { "SEGV", SIGSEGV }, /* 11 */
- { "PIPE", SIGPIPE }, /* 13 */
- { "ALRM", SIGALRM }, /* 14 */
- { "TERM", SIGTERM }, /* 15 */
- { "USR1", SIGUSR1 }, /* 10 (arm,i386,m68k,ppc), 30 (alpha,sparc*), 16 (mips) */
- { "USR2", SIGUSR2 }, /* 12 (arm,i386,m68k,ppc), 31 (alpha,sparc*), 17 (mips) */
- { "CHLD", SIGCHLD }, /* 17 (arm,i386,m68k,ppc), 20 (alpha,sparc*), 18 (mips) */
- { "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) */
- /* Miscellaneous other signals */
-#ifdef SIGTRAP
- { "TRAP", SIGTRAP }, /* 5 */
-#endif
-#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
-#ifdef SIGSYS
- { "SYS", SIGSYS }, /* 12 (mips,alpha,sparc*) */
-#endif
-#ifdef SIGSTKFLT
- { "STKFLT", SIGSTKFLT }, /* 16 (arm,i386,m68k,ppc) */
-#endif
-#ifdef SIGURG
- { "URG", SIGURG }, /* 23 (arm,i386,m68k,ppc), 16 (alpha,sparc*), 21 (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 SIGCLD
- { "CLD", SIGCLD }, /* same as SIGCHLD (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 SIGPWR
- { "PWR", SIGPWR }, /* 30 (arm,i386,m68k,ppc), 29 (alpha,sparc*), 19 (mips) */
-#endif
-#ifdef SIGINFO
- { "INFO", SIGINFO }, /* 29 (alpha) */
+/* partial success, otherwise we return regular EXIT_{SUCCESS,FAILURE} */
+#define KILL_EXIT_SOMEOK 64
+
+enum {
+ KILL_FIELD_WIDTH = 11,
+ KILL_OUTPUT_WIDTH = 72
+};
+
+#ifdef UL_HAVE_PIDFD
+# include <poll.h>
+# include "list.h"
+struct timeouts {
+ int period;
+ int sig;
+ struct list_head follow_ups;
+};
#endif
-#ifdef SIGLOST
- { "LOST", SIGLOST }, /* 29 (arm,i386,m68k,ppc,sparc*) */
+
+struct kill_control {
+ char *arg;
+ pid_t pid;
+ int numsig;
+#ifdef HAVE_SIGQUEUE
+ union sigval sigdata;
#endif
-#ifdef SIGWINCH
- { "WINCH", SIGWINCH }, /* 28 (arm,i386,m68k,ppc,alpha,sparc*), 20 (mips) */
+#ifdef UL_HAVE_PIDFD
+ struct list_head follow_ups;
#endif
-#ifdef SIGUNUSED
- { "UNUSED", SIGUNUSED }, /* 31 (arm,i386,m68k,ppc) */
+ unsigned int
+ check_all:1,
+ do_kill:1,
+ do_pid:1,
+ require_handler:1,
+ use_sigval:1,
+#ifdef UL_HAVE_PIDFD
+ timeout:1,
#endif
+ verbose:1;
};
-int main (int argc, char *argv[]);
-extern char *mybasename(char *);
-int signame_to_signum (char *sig);
-int arg_to_signum (char *arg, int mask);
-void nosig (char *name);
-void printsig (int sig);
-void printsignals (FILE *fp);
-int usage (int status);
-int kill_verbose (char *procname, int pid, int sig);
-
-extern int *get_pids (char *, int);
-
-static char *progname;
-
-int main (int argc, char *argv[])
+static void print_signal_name(int signum)
{
- int errors, numsig, pid;
- char *ep, *arg, *p;
- int do_pid, do_kill, check_all;
- int *pids, *ip;
-
- progname = argv[0];
- if ((p = strrchr(progname, '/')) != NULL)
- progname = p+1;
-
- setlocale(LC_ALL, "");
- bindtextdomain(PACKAGE, LOCALEDIR);
- textdomain(PACKAGE);
-
- numsig = SIGTERM;
- do_pid = (! strcmp (progname, "pid")); /* Yecch */
- do_kill = 0;
- check_all = 0;
-
- /* loop through the arguments.
- actually, -a is the only option can be used with other options.
- `kill' is basically a one-option-at-most program. */
- for (argc--, argv++; argc > 0; argc--, argv++) {
- arg = *argv;
- if (*arg != '-') {
- break;
- }
- if (! strcmp (arg, "--")) {
- argc--, argv++;
- break;
- }
- if (! strcmp (arg, "-v") || ! strcmp (arg, "-V") ||
- ! strcmp (arg, "--version")) {
- printf(_("%s from %s%s\n"), progname, "util-linux-", VERSION);
- return 0;
- }
- if (! strcmp (arg, "-a")) {
- check_all++;
- continue;
- }
- if (! strcmp (arg, "-l")) {
- if (argc < 2) {
- printsignals (stdout);
- return 0;
- }
- if (argc > 2) {
- return usage (1);
- }
- /* argc == 2, accept "kill -l $?" */
- arg = argv[1];
- if ((numsig = arg_to_signum (arg, 1)) < 0) {
- fprintf (stderr, _("%s: unknown signal %s\n"), progname, arg);
- return 1;
- }
- printsig (numsig);
- return 0;
- }
- if (! strcmp (arg, "-p")) {
- do_pid++;
- if (do_kill)
- return usage (1);
- continue;
+ const char *name = signum_to_signame(signum);
+
+ if (name) {
+ printf("%s\n", name);
+ return;
}
- if (! strcmp (arg, "-s")) {
- if (argc < 2) {
- return usage (1);
- }
- do_kill++;
- if (do_pid)
- return usage (1);
- argc--, argv++;
- arg = *argv;
- if ((numsig = arg_to_signum (arg, 0)) < 0) {
- nosig (arg);
- return 1;
- }
- continue;
+#ifdef SIGRTMIN
+ if (SIGRTMIN <= signum && signum <= SIGRTMAX) {
+ printf("RT%d\n", signum - SIGRTMIN);
+ return;
}
- /* `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 signal n, or pid -n (i.e. process group n).
- In case of doubt POSIX tells us to assume a signal.
- If a signal has been parsed, assume it's a pid, break */
- if (do_kill)
- break;
- arg++;
- if ((numsig = arg_to_signum (arg, 0)) < 0) {
- return usage (1);
+#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;
}
- do_kill++;
- if (do_pid)
- return usage (1);
- continue;
- }
-
- if (! *argv) {
- return usage (1);
- }
- if (do_pid) {
- numsig = -1;
- }
-
- /* we're done with the options.
- the rest of the arguments should be process ids and names.
- kill them. */
- for (errors = 0; (arg = *argv) != NULL; argv++) {
- pid = strtol (arg, &ep, 10);
- if (! *ep)
- errors += kill_verbose (arg, pid, numsig);
- else {
- pids = get_pids (arg, check_all);
- if (! pids) {
- errors++;
- fprintf (stderr, _("%s: can't find process \"%s\"\n"),
- progname, arg);
- continue;
- }
- for (ip = pids; *ip >= 0; ip++)
- errors += kill_verbose (arg, *ip, numsig);
- free (pids);
+ *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;
+ const char *signame = NULL;
+ int signum = 0;
+
+ if (!pretty) {
+ for (n = 0; get_signame_by_idx(n, &signame, NULL) == 0; n++) {
+ lth = 1 + strlen(signame);
+ if (KILL_OUTPUT_WIDTH < lpos + lth) {
+ fputc('\n', fp);
+ lpos = 0;
+ } else if (lpos)
+ fputc(' ', fp);
+ lpos += lth;
+ fputs(signame, fp);
+ }
+#ifdef SIGRTMIN
+ fputs(" RT<N> RTMIN+<N> RTMAX-<N>", fp);
+#endif
+ fputc('\n', fp);
+ return;
}
- }
- return (errors);
+
+ /* pretty print */
+ width = get_terminal_width(KILL_OUTPUT_WIDTH + 1) - 1;
+ for (n = 0; get_signame_by_idx(n, &signame, &signum) == 0; n++)
+ pretty_print_signal(fp, width, &lpos, signum, signame);
+#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);
}
+static int arg_to_signum(char *arg, int maskbit)
+{
+ int numsig;
+ char *ep;
+
+ if (isdigit(*arg)) {
+ errno = 0;
+ numsig = strtol(arg, &ep, 10);
+ if (NSIG <= numsig && maskbit && (numsig & 128) != 0)
+ numsig -= 128;
+ if (errno || *ep != 0 || numsig < 0 || NSIG <= numsig)
+ return -1;
+ return numsig;
+ }
+ return signame_to_signum(arg);
+}
-int signame_to_signum (char *sig)
+static void __attribute__((__noreturn__)) usage(void)
{
- int n;
-
- if (! strncasecmp (sig, "sig", 3))
- sig += 3;
- for (n = 0; n < SIZE(sys_signame); n++) {
- if (! strcasecmp (sys_signame[n].name, sig))
- return sys_signame[n].val;
- }
- return (-1);
+ FILE *out = stdout;
+ 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
+#ifdef UL_HAVE_PIDFD
+ fputs(_(" --timeout <milliseconds> <follow-up signal>\n"
+ " wait up to timeout and send follow-up signal\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(_(" -r, --require-handler do not send signal if signal handler is not present\n"), out);
+ fputs(_(" --verbose print pids that will be signaled\n"), out);
+
+ fputs(USAGE_SEPARATOR, out);
+ fprintf(out, USAGE_HELP_OPTIONS(24));
+ fprintf(out, USAGE_MAN_TAIL("kill(1)"));
+
+ exit(EXIT_SUCCESS);
}
-int arg_to_signum (char *arg, int maskbit)
+static void __attribute__((__noreturn__)) print_kill_version(void)
{
- int numsig;
- char *ep;
-
- if (isdigit (*arg)) {
- numsig = strtol (arg, &ep, 10);
- if (numsig >= NSIG && maskbit && (numsig & 128) != 0)
- numsig -= 128;
- if (*ep != 0 || numsig < 0 || numsig >= NSIG)
- return (-1);
- return (numsig);
- }
- return (signame_to_signum (arg));
+ static const char *features[] = {
+#ifdef HAVE_SIGQUEUE
+ "sigqueue",
+#endif
+#ifdef UL_HAVE_PIDFD
+ "pidfd",
+#endif
+ };
+
+ printf(_("%s from %s"), program_invocation_short_name, PACKAGE_STRING);
+
+ if (ARRAY_SIZE(features)) {
+ size_t i;
+ fputs(_(" (with: "), stdout);
+ for (i = 0; i < ARRAY_SIZE(features); i++) {
+ fputs(features[i], stdout);
+ if (i + 1 < ARRAY_SIZE(features))
+ fputs(", ", stdout);
+ }
+ fputs(")\n", stdout);
+ }
+ exit(EXIT_SUCCESS);
}
-void nosig (char *name)
+static char **parse_arguments(int argc, char **argv, struct kill_control *ctl)
{
- fprintf (stderr, _("%s: unknown signal %s; valid signals:\n"), progname, name);
- printsignals (stderr);
+ 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"))
+ print_kill_version();
+ if (!strcmp(arg, "-h") || !strcmp(arg, "--help"))
+ usage();
+ 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, "-r") || !strcmp(arg, "--require-handler")) {
+ ctl->require_handler = 1;
+ continue;
+ }
+ 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
+#ifdef UL_HAVE_PIDFD
+ if (!strcmp(arg, "--timeout")) {
+ struct timeouts *next;
+
+ ctl->timeout = 1;
+ if (argc < 2)
+ errx(EXIT_FAILURE, _("option '%s' requires an argument"), arg);
+ argc--, argv++;
+ arg = *argv;
+ next = xcalloc(1, sizeof(*next));
+ next->period = strtos32_or_err(arg, _("argument error"));
+ INIT_LIST_HEAD(&next->follow_ups);
+ argc--, argv++;
+ arg = *argv;
+ if ((next->sig = arg_to_signum(arg, 0)) < 0)
+ err_nosig(arg);
+ list_add_tail(&next->follow_ups, &ctl->follow_ups);
+ 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");
+ }
+ if (!*argv)
+ errx(EXIT_FAILURE, _("not enough arguments"));
+ return argv;
}
-void printsig (int sig)
+#ifdef UL_HAVE_PIDFD
+static int kill_with_timeout(const struct kill_control *ctl)
{
- int n;
+ int pfd, n;
+ struct pollfd p = { 0 };
+ siginfo_t info = { 0 };
+ struct list_head *entry;
- for (n = 0; n < SIZE(sys_signame); n++) {
- if (sys_signame[n].val == sig) {
- printf ("%s\n", sys_signame[n].name);
- return;
+ info.si_code = SI_QUEUE;
+ info.si_signo = ctl->numsig;
+ info.si_uid = getuid();
+ info.si_pid = getpid();
+ info.si_value.sival_int =
+ ctl->use_sigval != 0 ? ctl->use_sigval : ctl->numsig;
+
+ if ((pfd = pidfd_open(ctl->pid, 0)) < 0)
+ err(EXIT_FAILURE, _("pidfd_open() failed: %d"), ctl->pid);
+ p.fd = pfd;
+ p.events = POLLIN;
+
+ if (pidfd_send_signal(pfd, ctl->numsig, &info, 0) < 0)
+ err(EXIT_FAILURE, _("pidfd_send_signal() failed"));
+ list_for_each(entry, &ctl->follow_ups) {
+ struct timeouts *timeout;
+
+ timeout = list_entry(entry, struct timeouts, follow_ups);
+ n = poll(&p, 1, timeout->period);
+ if (n < 0)
+ err(EXIT_FAILURE, _("poll() failed"));
+ if (n == 0) {
+ info.si_signo = timeout->sig;
+ if (ctl->verbose)
+ printf(_("timeout, sending signal %d to pid %d\n"),
+ timeout->sig, ctl->pid);
+ if (pidfd_send_signal(pfd, timeout->sig, &info, 0) < 0)
+ err(EXIT_FAILURE, _("pidfd_send_signal() failed"));
+ }
}
- }
- printf("%d\n", sig);
+ return 0;
}
+#endif
-void printsignals (FILE *fp)
+static int kill_verbose(const struct kill_control *ctl)
{
- int n, lth;
- int lpos = 0;
-
- for (n = 0; n < SIZE(sys_signame); n++) {
- lth = 1+strlen(sys_signame[n].name);
- if (lpos+lth > 72) {
- fputc ('\n', fp);
- lpos = 0;
- } else if (lpos)
- fputc (' ', fp);
- lpos += lth;
- fputs (sys_signame[n].name, fp);
- }
- fputc ('\n', fp);
+ 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 UL_HAVE_PIDFD
+ if (ctl->timeout) {
+ rc = kill_with_timeout(ctl);
+ } else
+#endif
+#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 usage (int status)
+static int check_signal_handler(const struct kill_control *ctl)
{
- FILE *fp;
+ uintmax_t sigcgt = 0;
+ int rc = 0, has_hnd = 0;
+ struct path_cxt *pc;
+
+ if (!ctl->require_handler)
+ return 1;
- fp = (status == 0 ? stdout : stderr);
- fprintf (fp, _("usage: %s [ -s signal | -p ] [ -a ] pid ...\n"), progname);
- fprintf (fp, _(" %s -l [ signal ]\n"), progname);
- return status;
+ pc = ul_new_procfs_path(ctl->pid, NULL);
+ if (!pc)
+ return -ENOMEM;
+
+ rc = procfs_process_get_stat_nth(pc, 34, &sigcgt);
+ if (rc)
+ return -EINVAL;
+
+ ul_unref_path(pc);
+
+ has_hnd = ((1UL << (ctl->numsig - 1)) & sigcgt) != 0;
+ if (ctl->verbose && !has_hnd)
+ printf(_("not signalling pid %d, it has no userspace handler for signal %d\n"), ctl->pid, ctl->numsig);
+
+ return has_hnd;
}
-int kill_verbose (char *procname, int pid, int sig)
+int main(int argc, char **argv)
{
- if (sig < 0) {
- printf ("%d\n", pid);
- return 0;
- }
- if (kill (pid, sig) < 0) {
- fprintf (stderr, "%s ", progname);
- perror (procname);
- return 1;
- }
- return 0;
+ struct kill_control ctl = { .numsig = SIGTERM };
+ int nerrs = 0, ct = 0;
+
+ setlocale(LC_ALL, "");
+ bindtextdomain(PACKAGE, LOCALEDIR);
+ textdomain(PACKAGE);
+ close_stdout_atexit();
+
+#ifdef UL_HAVE_PIDFD
+ INIT_LIST_HEAD(&ctl.follow_ups);
+#endif
+ 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 (check_signal_handler(&ctl) <= 0)
+ continue;
+ if (kill_verbose(&ctl) != 0)
+ nerrs++;
+ ct++;
+ } else {
+ int found = 0;
+ struct dirent *d;
+ DIR *dir = opendir(_PATH_PROC);
+ uid_t uid = !ctl.check_all ? getuid() : 0;
+
+ if (!dir)
+ continue;
+
+ while ((d = xreaddir(dir))) {
+ if (!ctl.check_all &&
+ !procfs_dirent_match_uid(dir, d, uid))
+ continue;
+ if (ctl.arg &&
+ !procfs_dirent_match_name(dir, d, ctl.arg))
+ continue;
+ if (procfs_dirent_get_pid(d, &ctl.pid) != 0)
+ continue;
+ if (check_signal_handler(&ctl) <= 0)
+ continue;
+
+ if (kill_verbose(&ctl) != 0)
+ nerrs++;
+ ct++;
+ found = 1;
+ }
+
+ closedir(dir);
+ if (!found) {
+ nerrs++, ct++;
+ warnx(_("cannot find process \"%s\""), ctl.arg);
+ }
+ }
+ }
+
+#ifdef UL_HAVE_PIDFD
+ while (!list_empty(&ctl.follow_ups)) {
+ struct timeouts *x = list_entry(ctl.follow_ups.next,
+ struct timeouts, follow_ups);
+ list_del(&x->follow_ups);
+ free(x);
+ }
+#endif
+ if (ct && nerrs == 0)
+ return EXIT_SUCCESS; /* full success */
+ if (ct == nerrs)
+ return EXIT_FAILURE; /* all failed */
+
+ return KILL_EXIT_SOMEOK; /* partial success */
}
projects / thirdparty / util-linux.git / blobdiff