[thirdparty/util-linux.git] / sys-utils / flock.c

/*   Copyright 2003-2005 H. Peter Anvin - All Rights Reserved
 *
 *   Permission is hereby granted, free of charge, to any person
 *   obtaining a copy of this software and associated documentation
 *   files (the "Software"), to deal in the Software without
 *   restriction, including without limitation the rights to use,
 *   copy, modify, merge, publish, distribute, sublicense, and/or
 *   sell copies of the Software, and to permit persons to whom
 *   the Software is furnished to do so, subject to the following
 *   conditions:
 *
 *   The above copyright notice and this permission notice shall
 *   be included in all copies or substantial portions of the Software.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *   OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *   NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *   HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *   WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *   FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *   OTHER DEALINGS IN THE SOFTWARE.
 */

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <getopt.h>
#include <paths.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include "c.h"
#include "nls.h"
#include "strutils.h"
#include "closestream.h"
#include "timer.h"

static void __attribute__((__noreturn__)) usage(int ex)
{
	fprintf(stderr, USAGE_HEADER);
	fprintf(stderr,
		_(" %1$s [options] <file>|<directory> <command> [<argument>...]\n"
		  " %1$s [options] <file>|<directory> -c <command>\n"
		  " %1$s [options] <file descriptor number>\n"),
		program_invocation_short_name);

	fputs(USAGE_SEPARATOR, stderr);
	fputs(_("Manage file locks from shell scripts.\n"), stderr);

	fputs(USAGE_OPTIONS, stderr);
	fputs(_(  " -s, --shared             get a shared lock\n"), stderr);
	fputs(_(  " -x, --exclusive          get an exclusive lock (default)\n"), stderr);
	fputs(_(  " -u, --unlock             remove a lock\n"), stderr);
	fputs(_(  " -n, --nonblock           fail rather than wait\n"), stderr);
	fputs(_(  " -w, --timeout <secs>     wait for a limited amount of time\n"), stderr);
	fputs(_(  " -E, --conflict-exit-code <number>  exit code after conflict or timeout\n"), stderr);
	fputs(_(  " -o, --close              close file descriptor before running command\n"), stderr);
	fputs(_(  " -c, --command <command>  run a single command string through the shell\n"), stderr);
	fprintf(stderr, USAGE_SEPARATOR);
	fprintf(stderr, USAGE_HELP);
	fprintf(stderr, USAGE_VERSION);
	fprintf(stderr, USAGE_MAN_TAIL("flock(1)"));
	exit(ex);
}

static sig_atomic_t timeout_expired = 0;

static void timeout_handler(int sig __attribute__((__unused__)))
{
	timeout_expired = 1;
}

static int open_file(const char *filename, int *flags)
{

	int fd;
	int fl = *flags == 0 ? O_RDONLY : *flags;

	errno = 0;
	fl |= O_NOCTTY | O_CREAT;
	fd = open(filename, fl, 0666);

	/* Linux doesn't like O_CREAT on a directory, even though it
	 * should be a no-op; POSIX doesn't allow O_RDWR or O_WRONLY
	 */
	if (fd < 0 && errno == EISDIR) {
		fl = O_RDONLY | O_NOCTTY;
		fd = open(filename, fl);
	}
	if (fd < 0) {
		warn(_("cannot open lock file %s"), filename);
		if (errno == ENOMEM || errno == EMFILE || errno == ENFILE)
			exit(EX_OSERR);
		if (errno == EROFS || errno == ENOSPC)
			exit(EX_CANTCREAT);
		exit(EX_NOINPUT);
	}
	*flags = fl;
	return fd;
}

int main(int argc, char *argv[])
{
	struct itimerval timeout, old_timer;
	int have_timeout = 0;
	int type = LOCK_EX;
	int block = 0;
	int open_flags = 0;
	int fd = -1;
	int opt, ix;
	int do_close = 0;
	int status;
	/*
	 * The default exit code for lock conflict or timeout
	 * is specified in man flock.1
	 */
	int conflict_exit_code = 1;
	char **cmd_argv = NULL, *sh_c_argv[4];
	const char *filename = NULL;
	struct sigaction old_sa;

	static const struct option long_options[] = {
		{"shared", no_argument, NULL, 's'},
		{"exclusive", no_argument, NULL, 'x'},
		{"unlock", no_argument, NULL, 'u'},
		{"nonblocking", no_argument, NULL, 'n'},
		{"nb", no_argument, NULL, 'n'},
		{"timeout", required_argument, NULL, 'w'},
		{"wait", required_argument, NULL, 'w'},
		{"conflict-exit-code", required_argument, NULL, 'E'},
		{"close", no_argument, NULL, 'o'},
		{"help", no_argument, NULL, 'h'},
		{"version", no_argument, NULL, 'V'},
		{NULL, 0, NULL, 0}
	};

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);
	atexit(close_stdout);

	if (argc < 2)
		usage(EX_USAGE);

	memset(&timeout, 0, sizeof timeout);

	optopt = 0;
	while ((opt =
		getopt_long(argc, argv, "+sexnouw:E:hV?", long_options,
			    &ix)) != EOF) {
		switch (opt) {
		case 's':
			type = LOCK_SH;
			break;
		case 'e':
		case 'x':
			type = LOCK_EX;
			break;
		case 'u':
			type = LOCK_UN;
			break;
		case 'o':
			do_close = 1;
			break;
		case 'n':
			block = LOCK_NB;
			break;
		case 'w':
			have_timeout = 1;
			strtotimeval_or_err(optarg, &timeout.it_value,
				_("invalid timeout value"));
			break;
		case 'E':
			conflict_exit_code = strtos32_or_err(optarg,
				_("invalid exit code"));
			break;
		case 'V':
			printf(UTIL_LINUX_VERSION);
			exit(EX_OK);
		default:
			/* optopt will be set if this was an unrecognized
			 * option, i.e.  *not* 'h' or '?
			 */
			usage(optopt ? EX_USAGE : 0);
			break;
		}
	}

	if (argc > optind + 1) {
		/* Run command */
		if (!strcmp(argv[optind + 1], "-c") ||
		    !strcmp(argv[optind + 1], "--command")) {
			if (argc != optind + 3)
				errx(EX_USAGE,
				     _("%s requires exactly one command argument"),
				     argv[optind + 1]);
			cmd_argv = sh_c_argv;
			cmd_argv[0] = getenv("SHELL");
			if (!cmd_argv[0] || !*cmd_argv[0])
				cmd_argv[0] = _PATH_BSHELL;
			cmd_argv[1] = "-c";
			cmd_argv[2] = argv[optind + 2];
			cmd_argv[3] = 0;
		} else {
			cmd_argv = &argv[optind + 1];
		}

		filename = argv[optind];
		fd = open_file(filename, &open_flags);

	} else if (optind < argc) {
		/* Use provided file descriptor */
		fd = strtos32_or_err(argv[optind], _("bad file descriptor"));
	} else {
		/* Bad options */
		errx(EX_USAGE, _("requires file descriptor, file or directory"));
	}

	if (have_timeout) {
		if (timeout.it_value.tv_sec == 0 &&
		    timeout.it_value.tv_usec == 0) {
			/* -w 0 is equivalent to -n; this has to be
			 * special-cased because setting an itimer to zero
			 * means disabled!
			 */
			have_timeout = 0;
			block = LOCK_NB;
		} else
			setup_timer(&timeout, &old_timer, &old_sa, timeout_handler);
	}

	while (flock(fd, type | block)) {
		switch (errno) {
		case EWOULDBLOCK:
			/* -n option set and failed to lock. */
			exit(conflict_exit_code);
		case EINTR:
			/* Signal received */
			if (timeout_expired)
				/* -w option set and failed to lock. */
				exit(conflict_exit_code);
			/* otherwise try again */
			continue;
		case EIO:
		case EBADF:		/* since Linux 3.4 (commit 55725513) */
			/* Probably NFSv4 where flock() is emulated by fcntl().
			 * Let's try to reopen in read-write mode.
			 */
			if (!(open_flags & O_RDWR) &&
			    type != LOCK_SH &&
			    filename &&
			    access(filename, R_OK | W_OK) == 0) {

				close(fd);
				open_flags = O_RDWR;
				fd = open_file(filename, &open_flags);

				if (open_flags & O_RDWR)
					break;
			}
			/* go through */
		default:
			/* Other errors */
			if (filename)
				warn("%s", filename);
			else
				warn("%d", fd);
			exit((errno == ENOLCK
			      || errno == ENOMEM) ? EX_OSERR : EX_DATAERR);
		}
	}

	if (have_timeout)
		cancel_timer(&old_timer, &old_sa);

	status = EX_OK;

	if (cmd_argv) {
		pid_t w, f;
		/* Clear any inherited settings */
		signal(SIGCHLD, SIG_DFL);
		f = fork();

		if (f < 0) {
			err(EX_OSERR, _("fork failed"));
		} else if (f == 0) {
			if (do_close)
				close(fd);
			execvp(cmd_argv[0], cmd_argv);
			/* execvp() failed */
			warn(_("failed to execute %s"), cmd_argv[0]);
			_exit((errno == ENOMEM) ? EX_OSERR : EX_UNAVAILABLE);
		} else {
			do {
				w = waitpid(f, &status, 0);
				if (w == -1 && errno != EINTR)
					break;
			} while (w != f);

			if (w == -1) {
				status = EXIT_FAILURE;
				warn(_("waitpid failed"));
			} else if (WIFEXITED(status))
				status = WEXITSTATUS(status);
			else if (WIFSIGNALED(status))
				status = WTERMSIG(status) + 128;
			else
				/* WTF? */
				status = EX_OSERR;
		}
	}

	return status;
}
Commit	Line	Data
75332f0f	1	/* Copyright 2003-2005 H. Peter Anvin - All Rights Reserved
baf39af1 KZ	2	*
	3	* Permission is hereby granted, free of charge, to any person
	4	* obtaining a copy of this software and associated documentation
	5	* files (the "Software"), to deal in the Software without
	6	* restriction, including without limitation the rights to use,
	7	* copy, modify, merge, publish, distribute, sublicense, and/or
	8	* sell copies of the Software, and to permit persons to whom
	9	* the Software is furnished to do so, subject to the following
	10	* conditions:
db1749cf	11	*
baf39af1 KZ	12	* The above copyright notice and this permission notice shall
baf39af1 KZ	13	* be included in all copies or substantial portions of the Software.
db1749cf	14	*
baf39af1 KZ	15	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
	16	* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
	17	* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	18	* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
	19	* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
	20	* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
	21	* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	22	* OTHER DEALINGS IN THE SOFTWARE.
75332f0f	23	*/
baf39af1	24
75332f0f	25	#include <ctype.h>
baf39af1	26	#include <errno.h>
75332f0f	27	#include <fcntl.h>
baf39af1	28	#include <getopt.h>
75332f0f	29	#include <paths.h>
baf39af1	30	#include <signal.h>
75332f0f SK	31	#include <stdio.h>
75332f0f SK	32	#include <stdlib.h>
baf39af1	33	#include <string.h>
baf39af1	34	#include <sysexits.h>
baf39af1	35	#include <sys/file.h>
75332f0f	36	#include <sys/stat.h>
baf39af1	37	#include <sys/time.h>
75332f0f	38	#include <sys/types.h>
d162fcb5	39	#include <sys/wait.h>
75332f0f	40	#include <unistd.h>
d162fcb5	41
d4eafec4	42	#include "c.h"
db1749cf	43	#include "nls.h"
37bb0ce8	44	#include "strutils.h"
efb8854f	45	#include "closestream.h"
907624eb	46	#include "timer.h"
db1749cf	47
e8cea669	48	static void __attribute__((__noreturn__)) usage(int ex)
baf39af1	49	{
dc36ee2a	50	fprintf(stderr, USAGE_HEADER);
75332f0f	51	fprintf(stderr,
7a853ebc BS	52	_(" %1$s [options] <file>\|<directory> <command> [<argument>...]\n"
7a853ebc BS	53	" %1$s [options] <file>\|<directory> -c <command>\n"
295dd902	54	" %1$s [options] <file descriptor number>\n"),
d4eafec4	55	program_invocation_short_name);
451dbcfa BS	56
	57	fputs(USAGE_SEPARATOR, stderr);
	58	fputs(_("Manage file locks from shell scripts.\n"), stderr);
	59
dc36ee2a	60	fputs(USAGE_OPTIONS, stderr);
7a853ebc BS	61	fputs(_( " -s, --shared get a shared lock\n"), stderr);
	62	fputs(_( " -x, --exclusive get an exclusive lock (default)\n"), stderr);
	63	fputs(_( " -u, --unlock remove a lock\n"), stderr);
	64	fputs(_( " -n, --nonblock fail rather than wait\n"), stderr);
	65	fputs(_( " -w, --timeout <secs> wait for a limited amount of time\n"), stderr);
	66	fputs(_( " -E, --conflict-exit-code <number> exit code after conflict or timeout\n"), stderr);
	67	fputs(_( " -o, --close close file descriptor before running command\n"), stderr);
	68	fputs(_( " -c, --command <command> run a single command string through the shell\n"), stderr);
dc36ee2a SK	69	fprintf(stderr, USAGE_SEPARATOR);
	70	fprintf(stderr, USAGE_HELP);
	71	fprintf(stderr, USAGE_VERSION);
	72	fprintf(stderr, USAGE_MAN_TAIL("flock(1)"));
75332f0f	73	exit(ex);
baf39af1 KZ	74	}
baf39af1 KZ	75
baf39af1 KZ	76	static sig_atomic_t timeout_expired = 0;
baf39af1 KZ	77
e8cea669	78	static void timeout_handler(int sig __attribute__((__unused__)))
baf39af1	79	{
75332f0f	80	timeout_expired = 1;
baf39af1 KZ	81	}
baf39af1 KZ	82
eb742a1f KZ	83	static int open_file(const char filename, int flags)
	84	{
	85
	86	int fd;
	87	int fl = flags == 0 ? O_RDONLY : flags;
	88
	89	errno = 0;
	90	fl \|= O_NOCTTY \| O_CREAT;
	91	fd = open(filename, fl, 0666);
	92
	93	/* Linux doesn't like O_CREAT on a directory, even though it
	94	* should be a no-op; POSIX doesn't allow O_RDWR or O_WRONLY
	95	*/
	96	if (fd < 0 && errno == EISDIR) {
	97	fl = O_RDONLY \| O_NOCTTY;
	98	fd = open(filename, fl);
	99	}
	100	if (fd < 0) {
	101	warn(_("cannot open lock file %s"), filename);
	102	if (errno == ENOMEM \|\| errno == EMFILE \|\| errno == ENFILE)
	103	exit(EX_OSERR);
	104	if (errno == EROFS \|\| errno == ENOSPC)
	105	exit(EX_CANTCREAT);
	106	exit(EX_NOINPUT);
	107	}
	108	*flags = fl;
	109	return fd;
	110	}
	111
baf39af1	112	int main(int argc, char *argv[])
d162fcb5	113	{
75332f0f SK	114	struct itimerval timeout, old_timer;
	115	int have_timeout = 0;
	116	int type = LOCK_EX;
	117	int block = 0;
eb742a1f	118	int open_flags = 0;
75332f0f SK	119	int fd = -1;
	120	int opt, ix;
	121	int do_close = 0;
75332f0f	122	int status;
827b1cee JYK	123	/*
	124	* The default exit code for lock conflict or timeout
	125	* is specified in man flock.1
	126	*/
	127	int conflict_exit_code = 1;
75332f0f SK	128	char *cmd_argv = NULL, sh_c_argv[4];
75332f0f SK	129	const char *filename = NULL;
907624eb	130	struct sigaction old_sa;
75332f0f	131
d89bfedf SK	132	static const struct option long_options[] = {
	133	{"shared", no_argument, NULL, 's'},
	134	{"exclusive", no_argument, NULL, 'x'},
	135	{"unlock", no_argument, NULL, 'u'},
	136	{"nonblocking", no_argument, NULL, 'n'},
	137	{"nb", no_argument, NULL, 'n'},
	138	{"timeout", required_argument, NULL, 'w'},
	139	{"wait", required_argument, NULL, 'w'},
827b1cee	140	{"conflict-exit-code", required_argument, NULL, 'E'},
d89bfedf SK	141	{"close", no_argument, NULL, 'o'},
	142	{"help", no_argument, NULL, 'h'},
	143	{"version", no_argument, NULL, 'V'},
	144	{NULL, 0, NULL, 0}
	145	};
	146
75332f0f SK	147	setlocale(LC_ALL, "");
	148	bindtextdomain(PACKAGE, LOCALEDIR);
	149	textdomain(PACKAGE);
efb8854f	150	atexit(close_stdout);
75332f0f	151
75332f0f SK	152	if (argc < 2)
	153	usage(EX_USAGE);
	154
	155	memset(&timeout, 0, sizeof timeout);
	156
	157	optopt = 0;
	158	while ((opt =
827b1cee	159	getopt_long(argc, argv, "+sexnouw:E:hV?", long_options,
75332f0f SK	160	&ix)) != EOF) {
	161	switch (opt) {
	162	case 's':
	163	type = LOCK_SH;
	164	break;
	165	case 'e':
	166	case 'x':
	167	type = LOCK_EX;
	168	break;
	169	case 'u':
	170	type = LOCK_UN;
	171	break;
	172	case 'o':
	173	do_close = 1;
	174	break;
	175	case 'n':
	176	block = LOCK_NB;
	177	break;
	178	case 'w':
	179	have_timeout = 1;
880c4045 KZ	180	strtotimeval_or_err(optarg, &timeout.it_value,
880c4045 KZ	181	_("invalid timeout value"));
75332f0f	182	break;
827b1cee JYK	183	case 'E':
	184	conflict_exit_code = strtos32_or_err(optarg,
	185	_("invalid exit code"));
	186	break;
75332f0f	187	case 'V':
0c6625a1	188	printf(UTIL_LINUX_VERSION);
56d45cfa	189	exit(EX_OK);
75332f0f SK	190	default:
	191	/* optopt will be set if this was an unrecognized
	192	* option, i.e. not 'h' or '?
	193	*/
	194	usage(optopt ? EX_USAGE : 0);
	195	break;
	196	}
	197	}
	198
	199	if (argc > optind + 1) {
	200	/* Run command */
	201	if (!strcmp(argv[optind + 1], "-c") \|\|
	202	!strcmp(argv[optind + 1], "--command")) {
d4eafec4 SK	203	if (argc != optind + 3)
	204	errx(EX_USAGE,
	205	_("%s requires exactly one command argument"),
	206	argv[optind + 1]);
75332f0f SK	207	cmd_argv = sh_c_argv;
	208	cmd_argv[0] = getenv("SHELL");
	209	if (!cmd_argv[0] \|\| !*cmd_argv[0])
	210	cmd_argv[0] = _PATH_BSHELL;
	211	cmd_argv[1] = "-c";
	212	cmd_argv[2] = argv[optind + 2];
	213	cmd_argv[3] = 0;
	214	} else {
	215	cmd_argv = &argv[optind + 1];
	216	}
	217
	218	filename = argv[optind];
eb742a1f KZ	219	fd = open_file(filename, &open_flags);
eb742a1f KZ	220
75332f0f SK	221	} else if (optind < argc) {
75332f0f SK	222	/* Use provided file descriptor */
c5c056e7	223	fd = strtos32_or_err(argv[optind], _("bad file descriptor"));
75332f0f SK	224	} else {
75332f0f SK	225	/* Bad options */
d4eafec4	226	errx(EX_USAGE, _("requires file descriptor, file or directory"));
75332f0f SK	227	}
	228
	229	if (have_timeout) {
	230	if (timeout.it_value.tv_sec == 0 &&
	231	timeout.it_value.tv_usec == 0) {
	232	/* -w 0 is equivalent to -n; this has to be
	233	* special-cased because setting an itimer to zero
	234	* means disabled!
	235	*/
	236	have_timeout = 0;
	237	block = LOCK_NB;
bc3ae4c6	238	} else
907624eb	239	setup_timer(&timeout, &old_timer, &old_sa, timeout_handler);
75332f0f SK	240	}
	241
	242	while (flock(fd, type \| block)) {
d4eafec4	243	switch (errno) {
75332f0f	244	case EWOULDBLOCK:
827b1cee JYK	245	/* -n option set and failed to lock. */
827b1cee JYK	246	exit(conflict_exit_code);
75332f0f SK	247	case EINTR:
	248	/* Signal received */
	249	if (timeout_expired)
827b1cee JYK	250	/* -w option set and failed to lock. */
827b1cee JYK	251	exit(conflict_exit_code);
75332f0f SK	252	/* otherwise try again */
75332f0f SK	253	continue;
eb742a1f	254	case EIO:
caf1ba11	255	case EBADF: /* since Linux 3.4 (commit 55725513) */
eb742a1f KZ	256	/* Probably NFSv4 where flock() is emulated by fcntl().
	257	* Let's try to reopen in read-write mode.
	258	*/
	259	if (!(open_flags & O_RDWR) &&
	260	type != LOCK_SH &&
3c7fbc82	261	filename &&
eb742a1f KZ	262	access(filename, R_OK \| W_OK) == 0) {
	263
	264	close(fd);
	265	open_flags = O_RDWR;
	266	fd = open_file(filename, &open_flags);
	267
	268	if (open_flags & O_RDWR)
	269	break;
	270	}
	271	/* go through */
75332f0f SK	272	default:
	273	/* Other errors */
	274	if (filename)
d4eafec4	275	warn("%s", filename);
75332f0f	276	else
d4eafec4 SK	277	warn("%d", fd);
	278	exit((errno == ENOLCK
	279	\|\| errno == ENOMEM) ? EX_OSERR : EX_DATAERR);
75332f0f SK	280	}
	281	}
	282
bc3ae4c6 KZ	283	if (have_timeout)
bc3ae4c6 KZ	284	cancel_timer(&old_timer, &old_sa);
75332f0f	285
56d45cfa	286	status = EX_OK;
75332f0f SK	287
	288	if (cmd_argv) {
	289	pid_t w, f;
	290	/* Clear any inherited settings */
	291	signal(SIGCHLD, SIG_DFL);
	292	f = fork();
	293
	294	if (f < 0) {
d4eafec4	295	err(EX_OSERR, _("fork failed"));
75332f0f SK	296	} else if (f == 0) {
	297	if (do_close)
	298	close(fd);
	299	execvp(cmd_argv[0], cmd_argv);
75332f0f	300	/* execvp() failed */
07ff972e	301	warn(_("failed to execute %s"), cmd_argv[0]);
d4eafec4	302	_exit((errno == ENOMEM) ? EX_OSERR : EX_UNAVAILABLE);
75332f0f SK	303	} else {
	304	do {
	305	w = waitpid(f, &status, 0);
	306	if (w == -1 && errno != EINTR)
	307	break;
	308	} while (w != f);
	309
	310	if (w == -1) {
75332f0f	311	status = EXIT_FAILURE;
d4eafec4	312	warn(_("waitpid failed"));
75332f0f SK	313	} else if (WIFEXITED(status))
	314	status = WEXITSTATUS(status);
	315	else if (WIFSIGNALED(status))
	316	status = WTERMSIG(status) + 128;
	317	else
	318	/* WTF? */
	319	status = EX_OSERR;
	320	}
	321	}
	322
	323	return status;
d162fcb5	324	}