/* vi: set sw=4 ts=4: */
/*
- * Mini run-parts implementation for busybox
+ * run command from specified directory
*
*
* Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
- *
- * Based on the Debian run-parts program, version 1.15
- * Copyright (C) 1996 Jeff Noxon <jeff@router.patch.net>,
- * Copyright (C) 1996-1999 Guy Maor <maor@debian.org>
- *
+ * rewrite to vfork usage by
+ * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
*
* This program 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 of the License, or
* (at your option) any later version.
*
- * This program 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, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- * 02111-1307 USA
*
*/
-/* This is my first attempt to write a program in C (well, this is my first
- * attempt to write a program! :-) . */
-
-/* This piece of code is heavily based on the original version of run-parts,
- * taken from debian-utils. I've only removed the long options and a the
- * report mode. As the original run-parts support only long options, I've
- * broken compatibility because the BusyBox policy doesn't allow them.
- * The supported options are:
- * -t test. Print the name of the files to be executed, without
- * execute them.
- * -a ARG argument. Pass ARG as an argument the program executed. It can
- * be repeated to pass multiple arguments.
- * -u MASK umask. Set the umask of the program executed to MASK. */
-
-/* TODO
- * done - convert calls to error in perror... and remove error()
- * done - convert malloc/realloc to their x... counterparts
- * done - remove catch_sigchld
- * done - use bb's concat_path_file()
- * done - declare run_parts_main() as extern and any other function as static?
- */
#include <sys/types.h>
#include <sys/wait.h>
#include <dirent.h>
#include <unistd.h>
#include <ctype.h>
+#include <errno.h>
#include "libbb.h"
return 1;
}
-/* run_parts */
-/* Find the parts to run & call run_part() */
-extern int run_parts(char **args, const unsigned char test_mode)
+/* test mode = 1 is the same as offical run_parts
+ * test_mode = 2 means to fail siliently on missing directories
+ */
+
+extern int run_parts(char **args, const unsigned char test_mode, char **env)
{
struct dirent **namelist = 0;
struct stat st;
char *filename;
+ char *arg0 = args[0];
int entries;
int i;
int exitstatus = 0;
+#if __GNUC__
+ /* Avoid longjmp clobbering */
+ (void) &i;
+ (void) &exitstatus;
+#endif
/* scandir() isn't POSIX, but it makes things easy. */
- entries = scandir(args[0], &namelist, valid_name, alphasort);
+ entries = scandir(arg0, &namelist, valid_name, alphasort);
if (entries == -1) {
- perror_msg_and_die("failed to open directory %s", args[0]);
+ if (test_mode & 2) {
+ return(2);
+ }
+ bb_perror_msg_and_die("failed to open directory %s", arg0);
}
for (i = 0; i < entries; i++) {
- filename = concat_path_file(args[0], namelist[i]->d_name);
+ filename = concat_path_file(arg0, namelist[i]->d_name);
if (stat(filename, &st) < 0) {
- perror_msg_and_die("failed to stat component %s", filename);
+ bb_perror_msg_and_die("failed to stat component %s", filename);
}
if (S_ISREG(st.st_mode) && !access(filename, X_OK)) {
- if (test_mode)
- printf("run-parts would run %s\n", filename);
- else {
+ if (test_mode) {
+ puts(filename);
+ } else {
+ /* exec_errno is common vfork variable */
+ volatile int exec_errno = 0;
int result;
int pid;
- if ((pid = fork()) < 0) {
- perror_msg_and_die("failed to fork");
+ if ((pid = vfork()) < 0) {
+ bb_perror_msg_and_die("failed to fork");
} else if (!pid) {
- execv(args[0], args);
- perror_msg_and_die("failed to exec %s", args[0]);
+ args[0] = filename;
+ execve(filename, args, env);
+ exec_errno = errno;
+ _exit(1);
}
waitpid(pid, &result, 0);
-
+ if(exec_errno) {
+ errno = exec_errno;
+ bb_perror_msg("failed to exec %s", filename);
+ exitstatus = 1;
+ }
if (WIFEXITED(result) && WEXITSTATUS(result)) {
- perror_msg("%s exited with return code %d", args[0], WEXITSTATUS(result));
+ bb_perror_msg("%s exited with return code %d", filename, WEXITSTATUS(result));
exitstatus = 1;
} else if (WIFSIGNALED(result)) {
- perror_msg("%s exited because of uncaught signal %d", args[0], WTERMSIG(result));
+ bb_perror_msg("%s exited because of uncaught signal %d", filename, WTERMSIG(result));
exitstatus = 1;
}
}
}
else if (!S_ISDIR(st.st_mode)) {
- error_msg("component %s is not an executable plain file", filename);
+ bb_error_msg("component %s is not an executable plain file", filename);
exitstatus = 1;
}
projects / oweals / busybox.git / blobdiff