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/* vi: set sw=4 ts=4: */
/*
* run command from specified directory
*
*
* Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
* 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.
*
*
*/
#include <sys/types.h>
#include <sys/wait.h>
#include <stdlib.h>
#include <dirent.h>
#include <unistd.h>
#include <ctype.h>
#include <errno.h>
#include "libbb.h"
/* 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)
{
char *c = d->d_name;
while (*c) {
if (!isalnum(*c) && (*c != '_') && (*c != '-')) {
return 0;
}
++c;
}
return 1;
}
/* 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)
{
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("failed to open directory %s", arg0);
}
for (i = 0; i < entries; i++) {
filename = concat_path_file(arg0, namelist[i]->d_name);
if (stat(filename, &st) < 0) {
bb_perror_msg_and_die("failed to stat component %s", filename);
}
if (S_ISREG(st.st_mode) && !access(filename, X_OK)) {
if (test_mode & 1) {
puts(filename);
} else {
pid_t pid, wpid;
int result;
if ((pid = vfork()) < 0) {
bb_perror_msg_and_die("failed to fork");
} else if (pid==0) {
execv(filename, args);
_exit(1);
}
/* Wait for the child process to exit. Since we use vfork
* we shouldn't actually have to do any waiting... */
wpid = wait(&result);
while (wpid > 0) {
/* Find out who died, make sure it is the right process */
if (pid == wpid) {
if (WIFEXITED(result) && WEXITSTATUS(result)) {
bb_perror_msg("%s exited with return code %d", filename, WEXITSTATUS(result));
exitstatus = 1;
} else if (WIFSIGNALED(result) && WIFSIGNALED(result)) {
int sig;
sig = WTERMSIG(result);
bb_perror_msg("%s exited because of uncaught signal %d (%s)",
filename, sig, u_signal_names(0, &sig, 1));
exitstatus = 1;
}
break;
} else {
/* Just in case some _other_ random child process exits */
wpid = wait(&result);
}
}
}
}
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);
}
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