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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