| 1 | /* vi: set sw=4 ts=4: */
|
|---|
| 2 | /*
|
|---|
| 3 | * run command from specified directory
|
|---|
| 4 | *
|
|---|
| 5 | *
|
|---|
| 6 | * Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
|
|---|
| 7 | * rewrite to vfork usage by
|
|---|
| 8 | * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
|
|---|
| 9 | *
|
|---|
| 10 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
|---|
| 11 | */
|
|---|
| 12 |
|
|---|
| 13 |
|
|---|
| 14 | #include <sys/types.h>
|
|---|
| 15 | #include <sys/wait.h>
|
|---|
| 16 | #include <stdlib.h>
|
|---|
| 17 | #include <dirent.h>
|
|---|
| 18 | #include <unistd.h>
|
|---|
| 19 | #include <ctype.h>
|
|---|
| 20 | #include <errno.h>
|
|---|
| 21 |
|
|---|
| 22 | #include "libbb.h"
|
|---|
| 23 |
|
|---|
| 24 | /* valid_name */
|
|---|
| 25 | /* True or false? Is this a valid filename (upper/lower alpha, digits,
|
|---|
| 26 | * underscores, and hyphens only?)
|
|---|
| 27 | */
|
|---|
| 28 | static int valid_name(const struct dirent *d)
|
|---|
| 29 | {
|
|---|
| 30 | char *c = d->d_name;
|
|---|
| 31 |
|
|---|
| 32 | while (*c) {
|
|---|
| 33 | if (!isalnum(*c) && (*c != '_') && (*c != '-')) {
|
|---|
| 34 | return 0;
|
|---|
| 35 | }
|
|---|
| 36 | ++c;
|
|---|
| 37 | }
|
|---|
| 38 | return 1;
|
|---|
| 39 | }
|
|---|
| 40 |
|
|---|
| 41 | /* test mode = 1 is the same as official run_parts
|
|---|
| 42 | * test_mode = 2 means to fail silently on missing directories
|
|---|
| 43 | */
|
|---|
| 44 |
|
|---|
| 45 | int run_parts(char **args, const unsigned char test_mode, char **env)
|
|---|
| 46 | {
|
|---|
| 47 | struct dirent **namelist = 0;
|
|---|
| 48 | struct stat st;
|
|---|
| 49 | char *filename;
|
|---|
| 50 | char *arg0 = args[0];
|
|---|
| 51 | int entries;
|
|---|
| 52 | int i;
|
|---|
| 53 | int exitstatus = 0;
|
|---|
| 54 |
|
|---|
| 55 | #if __GNUC__
|
|---|
| 56 | /* Avoid longjmp clobbering */
|
|---|
| 57 | (void) &i;
|
|---|
| 58 | (void) &exitstatus;
|
|---|
| 59 | #endif
|
|---|
| 60 | /* scandir() isn't POSIX, but it makes things easy. */
|
|---|
| 61 | entries = scandir(arg0, &namelist, valid_name, alphasort);
|
|---|
| 62 |
|
|---|
| 63 | if (entries == -1) {
|
|---|
| 64 | if (test_mode & 2) {
|
|---|
| 65 | return(2);
|
|---|
| 66 | }
|
|---|
| 67 | bb_perror_msg_and_die("unable to open `%s'", arg0);
|
|---|
| 68 | }
|
|---|
| 69 |
|
|---|
| 70 | for (i = 0; i < entries; i++) {
|
|---|
| 71 |
|
|---|
| 72 | filename = concat_path_file(arg0, namelist[i]->d_name);
|
|---|
| 73 |
|
|---|
| 74 | xstat(filename, &st);
|
|---|
| 75 | if (S_ISREG(st.st_mode) && !access(filename, X_OK)) {
|
|---|
| 76 | if (test_mode) {
|
|---|
| 77 | puts(filename);
|
|---|
| 78 | } else {
|
|---|
| 79 | /* exec_errno is common vfork variable */
|
|---|
| 80 | volatile int exec_errno = 0;
|
|---|
| 81 | int result;
|
|---|
| 82 | int pid;
|
|---|
| 83 |
|
|---|
| 84 | if ((pid = vfork()) < 0) {
|
|---|
| 85 | bb_perror_msg_and_die("failed to fork");
|
|---|
| 86 | } else if (!pid) {
|
|---|
| 87 | args[0] = filename;
|
|---|
| 88 | execve(filename, args, env);
|
|---|
| 89 | exec_errno = errno;
|
|---|
| 90 | _exit(1);
|
|---|
| 91 | }
|
|---|
| 92 |
|
|---|
| 93 | waitpid(pid, &result, 0);
|
|---|
| 94 | if(exec_errno) {
|
|---|
| 95 | errno = exec_errno;
|
|---|
| 96 | bb_perror_msg("failed to exec %s", filename);
|
|---|
| 97 | exitstatus = 1;
|
|---|
| 98 | }
|
|---|
| 99 | if (WIFEXITED(result) && WEXITSTATUS(result)) {
|
|---|
| 100 | bb_perror_msg("%s exited with return code %d", filename, WEXITSTATUS(result));
|
|---|
| 101 | exitstatus = 1;
|
|---|
| 102 | } else if (WIFSIGNALED(result)) {
|
|---|
| 103 | bb_perror_msg("%s exited because of uncaught signal %d", filename, WTERMSIG(result));
|
|---|
| 104 | exitstatus = 1;
|
|---|
| 105 | }
|
|---|
| 106 | }
|
|---|
| 107 | }
|
|---|
| 108 | else if (!S_ISDIR(st.st_mode)) {
|
|---|
| 109 | bb_error_msg("component %s is not an executable plain file", filename);
|
|---|
| 110 | exitstatus = 1;
|
|---|
| 111 | }
|
|---|
| 112 |
|
|---|
| 113 | free(namelist[i]);
|
|---|
| 114 | free(filename);
|
|---|
| 115 | }
|
|---|
| 116 | free(namelist);
|
|---|
| 117 |
|
|---|
| 118 | return(exitstatus);
|
|---|
| 119 | }
|
|---|
