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/* See LICENSE file for copyright and license details. */
#include <sys/prctl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "arg.h"
#ifdef TEST
# define LIBEXECDIR "."
# define REAPD "reapd.test"
#else
# ifndef REAPD
# define REAPD "reapd"
# endif
#endif
char *argv0;
static
void usage(void)
{
fprintf(stderr, "usage: %s [-f] command ...\n", argv0);
exit(1);
}
int
main(int argc, char *argv[])
{
int fatal = 0;
ARGBEGIN {
case 'f':
fatal = 1;
break;
default:
usage();
} ARGEND;
if (!argc)
usage();
if (access(LIBEXECDIR"/"REAPD, X_OK) < 0) {
fprintf(stderr, "%s: access %s: %s\n", argv0, LIBEXECDIR"/"REAPD, strerror(errno));
return 2;
}
if (prctl(PR_SET_CHILD_SUBREAPER, 1) < 0) {
fprintf(stderr, "%s: prctl PR_SET_CHILD_SUBREAPER: %s\n", argv0, strerror(errno));
if (fatal)
return 2;
goto exec;
}
switch (fork()) {
case -1:
fprintf(stderr, "%s: fork: %s\n", argv0, strerror(errno));
if (fatal)
break;
/* fall through */
case 0:
(void) prctl(PR_SET_CHILD_SUBREAPER, 0);
exec:
execvp(*argv, argv);
fprintf(stderr, "%s: execvp %s: %s\n", argv0, *argv, strerror(errno));
break;
default:
execl(LIBEXECDIR"/"REAPD, LIBEXECDIR"/"REAPD, NULL);
fprintf(stderr, "%s: execl %s: %s\n", argv0, *argv, strerror(errno));
break;
}
return 2;
}
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