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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2001 by Sun Microsystems, Inc.
* All rights reserved.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* runat: run a command in attribute directory.
*
* runat file [command]
*
* when command is not specified an interactive shell is started
* in the attribute directory.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <libintl.h>
#include <errno.h>
#include <strings.h>
static void
usage()
{
(void) fprintf(stderr, gettext("usage: runat filename [command]\n"));
}
int
main(int argc, char *argv[])
{
int fd;
int dirfd;
int i;
int argslen;
char *shell;
char *args[4];
char *cmdargs;
if (argc < 2) {
usage();
exit(127);
}
if ((fd = open64(argv[1], O_RDONLY)) == -1) {
(void) fprintf(stderr,
gettext("runat: cannot open %s: %s\n"), argv[1],
strerror(errno));
exit(125);
}
if ((dirfd = openat64(fd, ".", O_RDONLY|O_XATTR)) == -1) {
(void) fprintf(stderr,
gettext("runat: cannot open attribute"
" directory for %s: %s\n"), argv[1], strerror(errno));
exit(125);
}
(void) close(fd);
if (fchdir(dirfd) == -1) {
(void) fprintf(stderr,
gettext("runat: cannot fchdir to attribute"
" directory: %s\n"), strerror(errno));
exit(125);
}
if (argc < 3) {
shell = getenv("SHELL");
if (shell == NULL) {
(void) fprintf(stderr,
gettext(
"runat: shell not found, using /bin/sh\n"));
shell = "/bin/sh";
}
(void) execl(shell, shell, NULL);
(void) fprintf(stderr,
gettext("runat: Failed to exec %s: %s\n"), shell,
strerror(errno));
return (126);
}
/*
* Count up the size of all of the args
*/
for (i = 2, argslen = 0; i < argc; i++) {
argslen += strlen(argv[i]) + 1;
}
cmdargs = calloc(1, argslen);
if (cmdargs == NULL) {
(void) fprintf(stderr, gettext(
"runat: failed to allocate memory for"
" command arguments: %s\n"), strerror(errno));
exit(126);
}
/*
* create string with all of the args concatenated together
* This is done so that the shell will interpret the args
* and do globbing if necessary.
*/
for (i = 2; i < argc; i++) {
if (strlcat(cmdargs, argv[i], argslen) >= argslen) {
(void) fprintf(stderr, gettext(
"runat: arguments won't fit in"
" allocated buffer\n"));
exit(126);
}
/*
* tack on a space if there are more args
*/
if ((i + 1) < argc) {
if (strlcat(cmdargs, " ", argslen) >= argslen) {
(void) fprintf(stderr, gettext(
"runat: arguments won't fit in"
" allocated buffer\n"));
exit(126);
}
}
}
args[0] = "/bin/sh";
args[1] = "-c";
args[2] = cmdargs;
args[3] = NULL;
(void) execvp(args[0], args);
(void) fprintf(stderr, gettext("runat: Failed to exec %s: %s\n"),
argv[0], strerror(errno));
return (126);
}
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