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127 lines
2.9 KiB
C
127 lines
2.9 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* run command from specified directory
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*
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*
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* Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
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* rewrite to vfork usage by
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* Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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*
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*/
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stdlib.h>
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#include <dirent.h>
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#include <unistd.h>
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#include <ctype.h>
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#include <errno.h>
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#include "libbb.h"
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/* valid_name */
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/* True or false? Is this a valid filename (upper/lower alpha, digits,
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* underscores, and hyphens only?)
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*/
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static int valid_name(const struct dirent *d)
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{
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char *c = d->d_name;
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while (*c) {
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if (!isalnum(*c) && (*c != '_') && (*c != '-')) {
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return 0;
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}
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++c;
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}
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return 1;
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}
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/* test mode = 1 is the same as official run_parts
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* test_mode = 2 means to fail silently on missing directories
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*/
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int run_parts(char **args, const unsigned char test_mode, char **env)
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{
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struct dirent **namelist = 0;
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struct stat st;
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char *filename;
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char *arg0 = args[0];
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int entries;
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int i;
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int exitstatus = 0;
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#if __GNUC__
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/* Avoid longjmp clobbering */
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(void) &i;
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(void) &exitstatus;
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#endif
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/* scandir() isn't POSIX, but it makes things easy. */
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entries = scandir(arg0, &namelist, valid_name, alphasort);
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if (entries == -1) {
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if (test_mode & 2) {
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return(2);
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}
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bb_perror_msg_and_die("failed to open directory %s", arg0);
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}
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for (i = 0; i < entries; i++) {
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filename = concat_path_file(arg0, namelist[i]->d_name);
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if (stat(filename, &st) < 0) {
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bb_perror_msg_and_die("failed to stat component %s", filename);
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}
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if (S_ISREG(st.st_mode) && !access(filename, X_OK)) {
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if (test_mode) {
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puts(filename);
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} else {
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/* exec_errno is common vfork variable */
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volatile int exec_errno = 0;
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int result;
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int pid;
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if ((pid = vfork()) < 0) {
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bb_perror_msg_and_die("failed to fork");
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} else if (!pid) {
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args[0] = filename;
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execve(filename, args, env);
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exec_errno = errno;
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_exit(1);
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}
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waitpid(pid, &result, 0);
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if(exec_errno) {
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errno = exec_errno;
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bb_perror_msg("failed to exec %s", filename);
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exitstatus = 1;
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}
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if (WIFEXITED(result) && WEXITSTATUS(result)) {
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bb_perror_msg("%s exited with return code %d", filename, WEXITSTATUS(result));
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exitstatus = 1;
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} else if (WIFSIGNALED(result)) {
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bb_perror_msg("%s exited because of uncaught signal %d", filename, WTERMSIG(result));
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exitstatus = 1;
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}
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}
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}
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else if (!S_ISDIR(st.st_mode)) {
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bb_error_msg("component %s is not an executable plain file", filename);
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exitstatus = 1;
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}
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free(namelist[i]);
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free(filename);
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}
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free(namelist);
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return(exitstatus);
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}
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