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- /*
- * libdpkg - Debian packaging suite library routines
- * subproc.c - subprocess helper routines
- *
- * Copyright © 1995 Ian Jackson <ian@chiark.greenend.org.uk>
- *
- * This 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 Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #include <config.h>
- #include <compat.h>
- #include <sys/types.h>
- #include <sys/wait.h>
- #include <errno.h>
- #include <string.h>
- #include <signal.h>
- #include <stdio.h>
- #include <dpkg/i18n.h>
- #include <dpkg/dpkg.h>
- #include <dpkg/subproc.h>
- static int catch_signals[] = { SIGQUIT, SIGINT };
- static struct sigaction uncatch_signals[sizeof_array(catch_signals)];
- void
- subproc_signals_setup(const char *name)
- {
- size_t i;
- struct sigaction catchsig;
- onerr_abort++;
- memset(&catchsig, 0, sizeof(catchsig));
- catchsig.sa_handler = SIG_IGN;
- sigemptyset(&catchsig.sa_mask);
- catchsig.sa_flags = 0;
- for (i = 0; i < sizeof_array(catch_signals); i++)
- if (sigaction(catch_signals[i], &catchsig, &uncatch_signals[i]))
- ohshite(_("unable to ignore signal %s before running %.250s"),
- strsignal(catch_signals[i]), name);
- push_cleanup(subproc_signals_cleanup, ~0, NULL, 0, 0);
- onerr_abort--;
- }
- void
- subproc_signals_cleanup(int argc, void **argv)
- {
- size_t i;
- for (i = 0; i < sizeof_array(catch_signals); i++) {
- if (sigaction(catch_signals[i], &uncatch_signals[i], NULL)) {
- fprintf(stderr, _("error un-catching signal %s: %s\n"),
- strsignal(catch_signals[i]), strerror(errno));
- onerr_abort++;
- }
- }
- }
- int
- subproc_check(int status, const char *desc, int flags)
- {
- int n;
- if (WIFEXITED(status)) {
- n = WEXITSTATUS(status);
- if (!n)
- return 0;
- if (flags & PROCNOERR)
- return n;
- if (flags & PROCWARN)
- warning(_("%s returned error exit status %d"),
- desc, n);
- else
- ohshit(_("subprocess %s returned error exit status %d"),
- desc, n);
- } else if (WIFSIGNALED(status)) {
- n = WTERMSIG(status);
- if (!n)
- return 0;
- if ((flags & PROCPIPE) && n == SIGPIPE)
- return 0;
- if (flags & PROCWARN)
- warning(_("%s killed by signal (%s)%s"),
- desc, strsignal(n),
- WCOREDUMP(status) ? _(", core dumped") : "");
- else
- ohshit(_("subprocess %s killed by signal (%s)%s"),
- desc, strsignal(n),
- WCOREDUMP(status) ? _(", core dumped") : "");
- } else {
- ohshit(_("subprocess %s failed with wait status code %d"),
- desc, status);
- }
- return -1;
- }
- int
- subproc_wait(pid_t pid, const char *desc)
- {
- pid_t r;
- int status;
- while ((r = waitpid(pid, &status, 0)) == -1 && errno == EINTR) ;
- if (r != pid) {
- onerr_abort++;
- ohshite(_("wait for %s failed"), desc);
- }
- return status;
- }
- int
- subproc_wait_check(pid_t pid, const char *desc, int flags)
- {
- int status;
- status = subproc_wait(pid, desc);
- return subproc_check(status, desc, flags);
- }
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