/* 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 official run_parts * test_mode = 2 means to fail silently 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(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) { 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, 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)) { 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); }