bool_t string_to_signum(const char *str, int *ret)
{
if (signame_to_signum(str, ret))
return TRUE;
return string_to_integer(str, ret);
}
static void parse_pdeathsig(struct privctx *opts, const char *str)
{
if (!strcmp(str, "keep")) {
if (prctl(PR_GET_PDEATHSIG, &opts->pdeathsig) != 0)
errx(SETPRIV_EXIT_PRIVERR,
_("failed to get parent death signal"));
} else if (!strcmp(str, "clear")) {
opts->pdeathsig = -1;
} else if ((opts->pdeathsig = signame_to_signum(str)) < 0) {
errx(EXIT_FAILURE, _("unknown signal: %s"), str);
}
}
static int arg_to_signum(char *arg, int maskbit)
{
int numsig;
char *ep;
if (isdigit(*arg)) {
numsig = strtol(arg, &ep, 10);
if (NSIG <= numsig && maskbit && (numsig & 128) != 0)
numsig -= 128;
if (*ep != 0 || numsig < 0 || NSIG <= numsig)
return -1;
return numsig;
}
return signame_to_signum(arg);
}
int arg_to_signum (char *arg, int maskbit)
{
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));
}
/**
* signal name to int
*
* returns the signal number for a signal name. signame might be SIGHUP or
* HUP for example.
*
* returns
* -2 for too short sig name
* -1 for unknown signal
* >0 signal number
*/
int signum(char* signame) {
char sigtmp[10] = "";
char *sig = sigtmp;
// if the string is less than 3 characters, abort
if (strlen(signame) < 3)
return -2;
// if the first 3 chars are "SIG", remove them
if (signame[0] == 'S' && signame[1] == 'I' && signame[2] == 'G') {
memcpy(sig, &(signame[3]), strlen(signame)-3);
sig[strlen(signame)-3] = '\0';
} else {
sig = signame;
}
return signame_to_signum(sig);
}
int main(int argc, char *argv[], char *envp[]) {
char *cmd = NULL, *ptr;
int retval = EXIT_SUCCESS, c, interval = 2,
len, i, j, *lens = NULL;
while ((c = getopt(argc, argv, "+hn:s:")) != -1) {
switch (c) {
case 'h':
retval = EXIT_SUCCESS;
goto main_exit;
break;
case 's':
sig = atoi(optarg);
if (!sig) {
sig = signame_to_signum(optarg);
}
break;
case 'n':
interval = atoi(optarg);
if (!interval) {
retval = EXIT_SUCCESS;
goto main_exit;
}
break;
default:
retval = EXIT_FAILURE;
goto main_exit;
}
}
if (argc <= optind) {
usage(argv[0]);
retval = EXIT_FAILURE;
goto main_exit;
}
signal(SIGINT, stirb);
signal(SIGTERM, stirb);
signal(SIGHUP, stirb);
signal(SIGCHLD, kindermord);
if ((childpid = fork()) == 0) {
if (execve(argv[optind], argv+optind, envp) < 0) {
perror(argv[optind]);
exit(1);
}
} else {
sleep(interval);
kill(childpid, sig);
waitpid(childpid, NULL, 0);
}
main_exit:
if (cmd)
free(cmd);
if (lens)
free(lens);
return retval;
}
int
trapcmd(int argc, char **argv)
{
char *action;
char **ap;
int signo;
if (argc <= 1) {
for (signo = 0 ; signo <= NSIG ; signo++)
if (trap[signo] != NULL) {
out1fmt("trap -- ");
print_quoted(trap[signo]);
out1fmt(" %s\n",
(signo) ? sys_signame[signo] : "EXIT");
}
return 0;
}
ap = argv + 1;
action = NULL;
if (strcmp(*ap, "--") == 0)
if (*++ap == NULL)
return 0;
if (signame_to_signum(*ap) == -1) {
if ((*ap)[0] == '-') {
if ((*ap)[1] == '\0')
ap++;
else if ((*ap)[1] == 'l' && (*ap)[2] == '\0') {
printsignals();
return 0;
}
else
error("bad option %s\n", *ap);
}
else
action = *ap++;
}
while (*ap) {
if (is_number(*ap))
signo = number(*ap);
else
signo = signame_to_signum(*ap);
if (signo < 0 || signo > NSIG)
error("%s: bad trap", *ap);
INTOFF;
if (action)
action = savestr(action);
if (trap[signo])
ckfree(trap[signo]);
trap[signo] = action;
if (signo != 0)
setsignal(signo, 0);
INTON;
ap++;
}
return 0;
}
int
main(int argc, char *argv[])
{
int errors, numsig, pid;
char *ep;
setprogname(argv[0]);
setlocale(LC_ALL, "");
if (argc < 2)
usage();
numsig = SIGTERM;
argc--, argv++;
if (strcmp(*argv, "-l") == 0) {
argc--, argv++;
if (argc > 1)
usage();
if (argc == 1) {
if (isdigit((unsigned char)**argv) == 0)
usage();
numsig = strtol(*argv, &ep, 10);
if (*ep != '\0') {
errx(EXIT_FAILURE, "illegal signal number: %s",
*argv);
/* NOTREACHED */
}
if (numsig >= 128)
numsig -= 128;
if (numsig <= 0 || numsig >= NSIG)
nosig(*argv);
printf("%s\n", sys_signame[numsig]);
exit(0);
}
printsignals(stdout);
exit(0);
}
if (!strcmp(*argv, "-s")) {
argc--, argv++;
if (argc < 1) {
warnx("option requires an argument -- s");
usage();
}
if (strcmp(*argv, "0")) {
if ((numsig = signame_to_signum(*argv)) < 0)
nosig(*argv);
} else
numsig = 0;
argc--, argv++;
} else if (**argv == '-') {
char *sn = *argv + 1;
if (isalpha((unsigned char)*sn)) {
if ((numsig = signame_to_signum(sn)) < 0)
nosig(sn);
} else if (isdigit((unsigned char)*sn)) {
numsig = strtol(sn, &ep, 10);
if (*ep) {
errx(EXIT_FAILURE, "illegal signal number: %s",
sn);
/* NOTREACHED */
}
if (numsig < 0 || numsig >= NSIG)
nosig(sn);
} else
nosig(sn);
argc--, argv++;
}
if (argc == 0)
usage();
for (errors = 0; argc; argc--, argv++) {
#ifdef SHELL
extern int getjobpgrp(const char *);
if (*argv[0] == '%') {
pid = getjobpgrp(*argv);
if (pid == 0) {
warnx("illegal job id: %s", *argv);
errors = 1;
continue;
}
} else
#endif
{
pid = strtol(*argv, &ep, 10);
if (!**argv || *ep) {
warnx("illegal process id: %s", *argv);
errors = 1;
continue;
}
}
if (kill(pid, numsig) == -1) {
warn("%s", *argv);
errors = 1;
}
#ifdef SHELL
/* Wakeup the process if it was suspended, so it can
exit without an explicit 'fg'. */
if (numsig == SIGTERM || numsig == SIGHUP)
kill(pid, SIGCONT);
#endif
}
exit(errors);
/* NOTREACHED */
}
int
main(int argc, char *argv[])
{
int errors, numsig, pid;
char *ep;
if (argc < 2)
usage();
numsig = SIGTERM;
argc--, argv++;
if (!strcmp(*argv, "-l")) {
argc--, argv++;
if (argc > 1)
usage();
if (argc == 1) {
if (!isdigit(**argv))
usage();
numsig = strtol(*argv, &ep, 10);
if (!**argv || *ep)
errx(2, "illegal signal number: %s", *argv);
if (numsig >= 128)
numsig -= 128;
if (numsig <= 0 || numsig >= sys_nsig)
nosig(*argv);
printf("%s\n", sys_signame[numsig]);
return (0);
}
printsignals(stdout);
return (0);
}
if (!strcmp(*argv, "-s")) {
argc--, argv++;
if (argc < 1) {
warnx("option requires an argument -- s");
usage();
}
if (strcmp(*argv, "0")) {
if ((numsig = signame_to_signum(*argv)) < 0)
nosig(*argv);
} else
numsig = 0;
argc--, argv++;
} else if (**argv == '-' && *(*argv + 1) != '-') {
++*argv;
if (isalpha(**argv)) {
if ((numsig = signame_to_signum(*argv)) < 0)
nosig(*argv);
} else if (isdigit(**argv)) {
numsig = strtol(*argv, &ep, 10);
if (!**argv || *ep)
errx(2, "illegal signal number: %s", *argv);
if (numsig < 0)
nosig(*argv);
} else
nosig(*argv);
argc--, argv++;
}
if (argc > 0 && strncmp(*argv, "--", 2) == 0)
argc--, argv++;
if (argc == 0)
usage();
for (errors = 0; argc; argc--, argv++) {
#ifdef SHELL
if (**argv == '%')
pid = getjobpgrp(*argv);
else
#endif
{
pid = strtol(*argv, &ep, 10);
if (!**argv || *ep)
errx(2, "illegal process id: %s", *argv);
}
if (kill(pid, numsig) == -1) {
warn("%s", *argv);
errors = 1;
}
}
return (errors);
}
int
main(int argc, char *argv[])
{
int errors, numsig, pid;
char *ep;
if (argc < 2)
usage();
numsig = SIGTERM;
argc--;
argv++;
if (!strcmp(*argv, "-l")) {
argc--, argv++;
if (argc > 1)
usage();
if (argc == 1) {
if (isdigit((unsigned char)**argv) == 0)
usage();
numsig = strtol(*argv, &ep, 10);
if (!*argv || *ep)
errx(1, "illegal signal number: %s", *argv);
if (numsig >= 128)
numsig -= 128;
if (numsig <= 0 || numsig >= NSIG)
nosig(*argv);
printf("%s\n", sys_signame[numsig]);
exit(0);
}
printsignals(stdout);
exit(0);
}
if (!strcmp(*argv, "-s")) {
argc--, argv++;
if (argc < 1) {
warnx("option requires an argument -- s");
usage();
}
if (strcmp(*argv, "0")) {
if ((numsig = signame_to_signum(*argv)) < 0)
nosig(*argv);
} else
numsig = 0;
argc--, argv++;
} else if (**argv == '-') {
++*argv;
if (isalpha(**argv)) {
if ((numsig = signame_to_signum(*argv)) < 0)
nosig(*argv);
} else if (isdigit(**argv)) {
numsig = strtol(*argv, &ep, 10);
if (!*argv || *ep)
errx(1, "illegal signal number: %s", *argv);
if (numsig <= 0 || numsig >= NSIG)
nosig(*argv);
} else
nosig(*argv);
argc--, argv++;
}
if (argc == 0)
usage();
for (errors = 0; argc; argc--, argv++) {
pid = strtol(*argv, &ep, 10);
if (!*argv || *ep) {
warnx("illegal process id: %s", *argv);
errors = 1;
} else if (kill(pid, numsig) == -1) {
warn("%s", *argv);
errors = 1;
}
}
exit(errors);
}
int
trapcmd(int argc, char **argv)
{
char *action;
char **ap;
int signo;
int errs = 0;
int printonly = 0;
ap = argv + 1;
if (argc == 2 && strcmp(*ap, "-l") == 0) {
printsignals();
return 0;
}
if (argc == 2 && strcmp(*ap, "-") == 0) {
for (signo = 0; signo < NSIG; signo++) {
if (trap[signo] == NULL)
continue;
INTOFF;
ckfree(trap[signo]);
trap[signo] = NULL;
if (signo != 0)
setsignal(signo, 0);
INTON;
}
return 0;
}
if (argc >= 2 && strcmp(*ap, "-p") == 0) {
printonly = 1;
ap++;
argc--;
}
if (argc > 1 && strcmp(*ap, "--") == 0) {
argc--;
ap++;
}
if (argc <= 1) {
int count;
if (printonly) {
for (count = 0, signo = 0 ; signo < NSIG ; signo++)
if (trap[signo] == NULL) {
if (count == 0)
out1str("trap -- -");
out1fmt(" %s", trap_signame(signo));
/* oh! unlucky 13 */
if (++count >= 13) {
out1str("\n");
count = 0;
}
}
if (count)
out1str("\n");
}
for (count = 0, signo = 0 ; signo < NSIG ; signo++)
if (trap[signo] != NULL && trap[signo][0] == '\0') {
if (count == 0)
out1str("trap -- ''");
out1fmt(" %s", trap_signame(signo));
/*
* the prefix is 10 bytes, with 4 byte
* signal names (common) we have room in
* the 70 bytes left on a normal line for
* 70/(4+1) signals, that's 14, but to
* allow for the occasional longer sig name
* we output one less...
*/
if (++count >= 13) {
out1str("\n");
count = 0;
}
}
if (count)
out1str("\n");
for (signo = 0 ; signo < NSIG ; signo++)
if (trap[signo] != NULL && trap[signo][0] != '\0') {
out1str("trap -- ");
print_quoted(trap[signo]);
out1fmt(" %s\n", trap_signame(signo));
}
return 0;
}
action = NULL;
if (!printonly && !is_number(*ap)) {
if ((*ap)[0] == '-' && (*ap)[1] == '\0')
ap++; /* reset to default */
else
action = *ap++; /* can be '' for "ignore" */
argc--;
}
if (argc < 2) { /* there must be at least 1 condition */
out2str("Usage: trap [-l]\n"
" trap -p [condition ...]\n"
" trap action condition ...\n"
" trap N condition ...\n");
return 2;
}
while (*ap) {
signo = signame_to_signum(*ap);
if (signo < 0 || signo >= NSIG) {
/* This is not a fatal error, so sayeth posix */
outfmt(out2, "trap: '%s' bad condition\n", *ap);
errs = 1;
ap++;
continue;
}
ap++;
if (printonly) {
out1str("trap -- ");
if (trap[signo] == NULL)
out1str("-");
else
print_quoted(trap[signo]);
out1fmt(" %s\n", trap_signame(signo));
continue;
}
INTOFF;
if (action)
action = savestr(action);
if (trap[signo])
ckfree(trap[signo]);
trap[signo] = action;
if (signo != 0)
setsignal(signo, 0);
INTON;
}
return errs;
}
int
trapcmd(shinstance *psh, int argc, char **argv)
{
char *action;
char **ap;
int signo;
#ifndef HAVE_SYS_SIGNAME
init_sys_signame();
#endif
if (argc <= 1) {
for (signo = 0 ; signo <= NSIG ; signo++)
if (psh->trap[signo] != NULL) {
out1fmt(psh, "trap -- ");
print_quoted(psh, psh->trap[signo]);
out1fmt(psh, " %s\n",
(signo) ? sys_signame[signo] : "EXIT");
}
return 0;
}
ap = argv + 1;
action = NULL;
if (strcmp(*ap, "--") == 0)
if (*++ap == NULL)
return 0;
if (signame_to_signum(psh, *ap) == -1) {
if ((*ap)[0] == '-') {
if ((*ap)[1] == '\0')
ap++;
else if ((*ap)[1] == 'l' && (*ap)[2] == '\0') {
printsignals(psh);
return 0;
}
else
error(psh, "bad option %s\n", *ap);
}
else
action = *ap++;
}
while (*ap) {
if (is_number(*ap))
signo = number(psh, *ap);
else
signo = signame_to_signum(psh, *ap);
if (signo < 0 || signo > NSIG)
error(psh, "%s: bad trap", *ap);
INTOFF;
if (action)
action = savestr(psh, action);
if (psh->trap[signo])
ckfree(psh, psh->trap[signo]);
psh->trap[signo] = action;
if (signo != 0)
setsignal(psh, signo, 0);
INTON;
ap++;
}
return 0;
}
