1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini run-parts implementation for busybox
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4 | *
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5 | * Copyright (C) 2007 Bernhard Reutner-Fischer
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6 | *
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7 | * Based on a older version that was in busybox which was 1k big.
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8 | * Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
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9 | *
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10 | * Based on the Debian run-parts program, version 1.15
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11 | * Copyright (C) 1996 Jeff Noxon <jeff@router.patch.net>,
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12 | * Copyright (C) 1996-1999 Guy Maor <maor@debian.org>
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13 | *
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14 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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15 | */
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16 |
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17 | /* This is my first attempt to write a program in C (well, this is my first
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18 | * attempt to write a program! :-) . */
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19 |
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20 | /* This piece of code is heavily based on the original version of run-parts,
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21 | * taken from debian-utils. I've only removed the long options and the
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22 | * report mode. As the original run-parts support only long options, I've
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23 | * broken compatibility because the BusyBox policy doesn't allow them.
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24 | * The supported options are:
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25 | * -t test. Print the name of the files to be executed, without
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26 | * execute them.
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27 | * -a ARG argument. Pass ARG as an argument the program executed. It can
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28 | * be repeated to pass multiple arguments.
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29 | * -u MASK umask. Set the umask of the program executed to MASK.
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30 | */
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31 |
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32 | //usage:#define run_parts_trivial_usage
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33 | //usage: "[-t"IF_FEATURE_RUN_PARTS_FANCY("l")"] [-a ARG]... [-u MASK] DIRECTORY"
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34 | //usage:#define run_parts_full_usage "\n\n"
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35 | //usage: "Run a bunch of scripts in DIRECTORY\n"
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36 | //usage: "\n -t Dry run"
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37 | //usage: IF_FEATURE_RUN_PARTS_FANCY(
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38 | //usage: "\n -l Print names of matching files even if they are not executable"
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39 | //usage: )
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40 | //usage: "\n -a ARG Pass ARG as argument to programs"
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41 | //usage: "\n -u MASK Set umask to MASK before running programs"
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42 | //usage:
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43 | //usage:#define run_parts_example_usage
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44 | //usage: "$ run-parts -a start /etc/init.d\n"
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45 | //usage: "$ run-parts -a stop=now /etc/init.d\n\n"
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46 | //usage: "Let's assume you have a script foo/dosomething:\n"
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47 | //usage: "#!/bin/sh\n"
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48 | //usage: "for i in $*; do eval $i; done; unset i\n"
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49 | //usage: "case \"$1\" in\n"
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50 | //usage: "start*) echo starting something;;\n"
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51 | //usage: "stop*) set -x; shutdown -h $stop;;\n"
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52 | //usage: "esac\n\n"
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53 | //usage: "Running this yields:\n"
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54 | //usage: "$run-parts -a stop=+4m foo/\n"
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55 | //usage: "+ shutdown -h +4m"
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56 |
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57 | #include "libbb.h"
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58 |
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59 | struct globals {
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60 | char **names;
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61 | int cur;
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62 | char *cmd[1];
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63 | } FIX_ALIASING;
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64 | #define G (*(struct globals*)&bb_common_bufsiz1)
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65 | #define names (G.names)
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66 | #define cur (G.cur )
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67 | #define cmd (G.cmd )
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68 | #define INIT_G() do { } while (0)
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69 |
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70 | enum { NUM_CMD = (COMMON_BUFSIZE - sizeof(G)) / sizeof(cmd[0]) - 1 };
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71 |
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72 | enum {
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73 | OPT_r = (1 << 0),
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74 | OPT_a = (1 << 1),
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75 | OPT_u = (1 << 2),
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76 | OPT_t = (1 << 3),
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77 | OPT_l = (1 << 4) * ENABLE_FEATURE_RUN_PARTS_FANCY,
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78 | };
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79 |
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80 | #if ENABLE_FEATURE_RUN_PARTS_FANCY
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81 | #define list_mode (option_mask32 & OPT_l)
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82 | #else
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83 | #define list_mode 0
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84 | #endif
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85 |
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86 | /* Is this a valid filename (upper/lower alpha, digits,
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87 | * underscores, and hyphens only?)
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88 | */
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89 | static bool invalid_name(const char *c)
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90 | {
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91 | c = bb_basename(c);
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92 |
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93 | while (*c && (isalnum(*c) || *c == '_' || *c == '-'))
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94 | c++;
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95 |
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96 | return *c; /* TRUE (!0) if terminating NUL is not reached */
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97 | }
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98 |
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99 | static int bb_alphasort(const void *p1, const void *p2)
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100 | {
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101 | int r = strcmp(*(char **) p1, *(char **) p2);
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102 | return (option_mask32 & OPT_r) ? -r : r;
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103 | }
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104 |
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105 | static int FAST_FUNC act(const char *file, struct stat *statbuf, void *args UNUSED_PARAM, int depth)
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106 | {
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107 | if (depth == 1)
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108 | return TRUE;
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109 |
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110 | if (depth == 2
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111 | && ( !(statbuf->st_mode & (S_IFREG | S_IFLNK))
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112 | || invalid_name(file)
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113 | || (!list_mode && access(file, X_OK) != 0))
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114 | ) {
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115 | return SKIP;
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116 | }
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117 |
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118 | names = xrealloc_vector(names, 4, cur);
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119 | names[cur++] = xstrdup(file);
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120 | /*names[cur] = NULL; - xrealloc_vector did it */
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121 |
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122 | return TRUE;
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123 | }
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124 |
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125 | #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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126 | static const char runparts_longopts[] ALIGN1 =
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127 | "arg\0" Required_argument "a"
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128 | "umask\0" Required_argument "u"
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129 | "test\0" No_argument "t"
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130 | #if ENABLE_FEATURE_RUN_PARTS_FANCY
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131 | "list\0" No_argument "l"
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132 | "reverse\0" No_argument "r"
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133 | //TODO: "verbose\0" No_argument "v"
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134 | #endif
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135 | ;
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136 | #endif
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137 |
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138 | int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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139 | int run_parts_main(int argc UNUSED_PARAM, char **argv)
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140 | {
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141 | const char *umask_p = "22";
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142 | llist_t *arg_list = NULL;
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143 | unsigned n;
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144 | int ret;
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145 |
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146 | INIT_G();
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147 |
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148 | #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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149 | applet_long_options = runparts_longopts;
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150 | #endif
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151 | /* We require exactly one argument: the directory name */
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152 | opt_complementary = "=1:a::";
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153 | getopt32(argv, "ra:u:t"IF_FEATURE_RUN_PARTS_FANCY("l"), &arg_list, &umask_p);
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154 |
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155 | umask(xstrtou_range(umask_p, 8, 0, 07777));
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156 |
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157 | n = 1;
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158 | while (arg_list && n < NUM_CMD) {
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159 | cmd[n++] = llist_pop(&arg_list);
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160 | }
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161 | /* cmd[n] = NULL; - is already zeroed out */
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162 |
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163 | /* run-parts has to sort executables by name before running them */
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164 |
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165 | recursive_action(argv[optind],
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166 | ACTION_RECURSE|ACTION_FOLLOWLINKS,
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167 | act, /* file action */
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168 | act, /* dir action */
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169 | NULL, /* user data */
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170 | 1 /* depth */
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171 | );
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172 |
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173 | if (!names)
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174 | return 0;
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175 |
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176 | qsort(names, cur, sizeof(char *), bb_alphasort);
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177 |
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178 | n = 0;
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179 | while (1) {
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180 | char *name = *names++;
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181 | if (!name)
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182 | break;
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183 | if (option_mask32 & (OPT_t | OPT_l)) {
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184 | puts(name);
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185 | continue;
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186 | }
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187 | cmd[0] = name;
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188 | ret = spawn_and_wait(cmd);
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189 | if (ret == 0)
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190 | continue;
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191 | n = 1;
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192 | if (ret < 0)
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193 | bb_perror_msg("can't execute '%s'", name);
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194 | else /* ret > 0 */
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195 | bb_error_msg("%s exited with code %d", name, ret & 0xff);
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196 | }
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197 |
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198 | return n;
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199 | }
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