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/* vi: set sw=4 ts=4: */
/*
* Mini run-parts implementation for busybox
*
*
* 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>
*
*
* Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
*/
/* 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 "busybox.h"
#include <getopt.h>
static const struct option runparts_long_options[] = {
{ "test", 0, NULL, 't' },
{ "umask", 1, NULL, 'u' },
{ "arg", 1, NULL, 'a' },
{ 0, 0, 0, 0 }
};
/* valid_name */
/* True or false? Is this a valid filename (upper/lower alpha, digits,
* underscores, and hyphens only?)
*/
static int valid_name(const struct dirent *d)
{
const char *c = d->d_name;
while (*c) {
if (!isalnum(*c) && (*c != '_') && (*c != '-')) {
return 0;
}
++c;
}
return 1;
}
/* test mode = 1 is the same as official run_parts
* test_mode = 2 means to fail silently on missing directories
*/
static int run_parts(char **args, const unsigned char test_mode)
{
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(arg0, &namelist, valid_name, alphasort);
if (entries == -1) {
if (test_mode & 2) {
return 2;
}
bb_perror_msg_and_die("cannot open '%s'", arg0);
}
for (i = 0; i < entries; i++) {
filename = concat_path_file(arg0, namelist[i]->d_name);
xstat(filename, &st);
if (S_ISREG(st.st_mode) && !access(filename, X_OK)) {
if (test_mode) {
puts(filename);
} else {
/* exec_errno is common vfork variable */
volatile int exec_errno = 0;
int result;
int pid;
if ((pid = vfork()) < 0) {
bb_perror_msg_and_die("failed to fork");
} else if (!pid) {
args[0] = filename;
execve(filename, args, environ);
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)) {
bb_perror_msg("%s exited with return code %d", filename, WEXITSTATUS(result));
exitstatus = 1;
} else if (WIFSIGNALED(result)) {
bb_perror_msg("%s exited because of uncaught signal %d", filename, WTERMSIG(result));
exitstatus = 1;
}
}
} else if (!S_ISDIR(st.st_mode)) {
bb_error_msg("component %s is not an executable plain file", filename);
exitstatus = 1;
}
free(namelist[i]);
free(filename);
}
free(namelist);
return exitstatus;
}
/* run_parts_main */
/* Process options */
int run_parts_main(int argc, char **argv);
int run_parts_main(int argc, char **argv)
{
char **args = xmalloc(2 * sizeof(char *));
unsigned char test_mode = 0;
unsigned short argcount = 1;
int opt;
umask(022);
while ((opt = getopt_long(argc, argv, "tu:a:",
runparts_long_options, NULL)) > 0)
{
switch (opt) {
/* Enable test mode */
case 't':
test_mode++;
break;
/* Set the umask of the programs executed */
case 'u':
/* Check and set the umask of the program executed. As stated in the original
* run-parts, the octal conversion in libc is not foolproof; it will take the
* 8 and 9 digits under some circumstances. We'll just have to live with it.
*/
umask(xstrtoul_range(optarg, 8, 0, 07777));
break;
/* Pass an argument to the programs */
case 'a':
/* Add an argument to the commands that we will call.
* Called once for every argument. */
args = xrealloc(args, (argcount + 2) * (sizeof(char *)));
args[argcount++] = optarg;
break;
default:
bb_show_usage();
}
}
/* We require exactly one argument: the directory name */
if (optind != (argc - 1)) {
bb_show_usage();
}
args[0] = argv[optind];
args[argcount] = 0;
return run_parts(args, test_mode);
}
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