[821] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * run command from specified directory
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| 4 | *
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| 5 | *
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| 6 | * Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
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| 7 | * rewrite to vfork usage by
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| 8 | * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
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| 9 | *
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| 10 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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| 11 | */
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| 12 |
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| 13 |
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| 14 | #include <sys/types.h>
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| 15 | #include <sys/wait.h>
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| 16 | #include <stdlib.h>
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| 17 | #include <dirent.h>
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| 18 | #include <unistd.h>
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| 19 | #include <ctype.h>
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| 20 | #include <errno.h>
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| 21 |
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| 22 | #include "libbb.h"
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| 23 |
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| 24 | /* valid_name */
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| 25 | /* True or false? Is this a valid filename (upper/lower alpha, digits,
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| 26 | * underscores, and hyphens only?)
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| 27 | */
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| 28 | static int valid_name(const struct dirent *d)
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| 29 | {
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| 30 | char *c = d->d_name;
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| 31 |
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| 32 | while (*c) {
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| 33 | if (!isalnum(*c) && (*c != '_') && (*c != '-')) {
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| 34 | return 0;
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| 35 | }
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| 36 | ++c;
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| 37 | }
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| 38 | return 1;
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| 39 | }
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| 40 |
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| 41 | /* test mode = 1 is the same as official run_parts
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| 42 | * test_mode = 2 means to fail silently on missing directories
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| 43 | */
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| 44 |
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| 45 | int run_parts(char **args, const unsigned char test_mode, char **env)
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| 46 | {
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| 47 | struct dirent **namelist = 0;
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| 48 | struct stat st;
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| 49 | char *filename;
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| 50 | char *arg0 = args[0];
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| 51 | int entries;
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| 52 | int i;
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| 53 | int exitstatus = 0;
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| 54 |
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| 55 | #if __GNUC__
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| 56 | /* Avoid longjmp clobbering */
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| 57 | (void) &i;
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| 58 | (void) &exitstatus;
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| 59 | #endif
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| 60 | /* scandir() isn't POSIX, but it makes things easy. */
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| 61 | entries = scandir(arg0, &namelist, valid_name, alphasort);
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| 62 |
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| 63 | if (entries == -1) {
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| 64 | if (test_mode & 2) {
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| 65 | return(2);
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| 66 | }
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| 67 | bb_perror_msg_and_die("unable to open `%s'", arg0);
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| 68 | }
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| 69 |
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| 70 | for (i = 0; i < entries; i++) {
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| 71 |
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| 72 | filename = concat_path_file(arg0, namelist[i]->d_name);
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| 73 |
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| 74 | xstat(filename, &st);
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| 75 | if (S_ISREG(st.st_mode) && !access(filename, X_OK)) {
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| 76 | if (test_mode) {
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| 77 | puts(filename);
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| 78 | } else {
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| 79 | /* exec_errno is common vfork variable */
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| 80 | volatile int exec_errno = 0;
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| 81 | int result;
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| 82 | int pid;
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| 83 |
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| 84 | if ((pid = vfork()) < 0) {
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| 85 | bb_perror_msg_and_die("failed to fork");
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| 86 | } else if (!pid) {
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| 87 | args[0] = filename;
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| 88 | execve(filename, args, env);
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| 89 | exec_errno = errno;
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| 90 | _exit(1);
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| 91 | }
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| 92 |
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| 93 | waitpid(pid, &result, 0);
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| 94 | if(exec_errno) {
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| 95 | errno = exec_errno;
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| 96 | bb_perror_msg("failed to exec %s", filename);
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| 97 | exitstatus = 1;
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| 98 | }
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| 99 | if (WIFEXITED(result) && WEXITSTATUS(result)) {
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| 100 | bb_perror_msg("%s exited with return code %d", filename, WEXITSTATUS(result));
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| 101 | exitstatus = 1;
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| 102 | } else if (WIFSIGNALED(result)) {
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| 103 | bb_perror_msg("%s exited because of uncaught signal %d", filename, WTERMSIG(result));
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| 104 | exitstatus = 1;
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| 105 | }
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| 106 | }
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| 107 | }
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| 108 | else if (!S_ISDIR(st.st_mode)) {
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| 109 | bb_error_msg("component %s is not an executable plain file", filename);
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| 110 | exitstatus = 1;
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| 111 | }
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| 112 |
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| 113 | free(namelist[i]);
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| 114 | free(filename);
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| 115 | }
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| 116 | free(namelist);
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| 117 |
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| 118 | return(exitstatus);
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| 119 | }
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