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 | */
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25 | //config:config RUN_PARTS
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26 | //config: bool "run-parts"
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27 | //config: default y
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28 | //config: help
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29 | //config: run-parts is a utility designed to run all the scripts in a directory.
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30 | //config:
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31 | //config: It is useful to set up a directory like cron.daily, where you need to
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32 | //config: execute all the scripts in that directory.
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33 | //config:
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34 | //config: In this implementation of run-parts some features (such as report
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35 | //config: mode) are not implemented.
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36 | //config:
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37 | //config: Unless you know that run-parts is used in some of your scripts
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38 | //config: you can safely say N here.
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39 | //config:
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40 | //config:config FEATURE_RUN_PARTS_LONG_OPTIONS
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41 | //config: bool "Enable long options"
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42 | //config: default y
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43 | //config: depends on RUN_PARTS && LONG_OPTS
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44 | //config: help
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45 | //config: Support long options for the run-parts applet.
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46 | //config:
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47 | //config:config FEATURE_RUN_PARTS_FANCY
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48 | //config: bool "Support additional arguments"
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49 | //config: default y
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50 | //config: depends on RUN_PARTS
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51 | //config: help
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52 | //config: Support additional options:
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53 | //config: -l --list print the names of the all matching files (not
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54 | //config: limited to executables), but don't actually run them.
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55 |
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56 | //applet:IF_RUN_PARTS(APPLET_ODDNAME(run-parts, run_parts, BB_DIR_BIN, BB_SUID_DROP, run_parts))
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57 |
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58 | //kbuild:lib-$(CONFIG_RUN_PARTS) += run_parts.o
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59 |
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60 | //usage:#define run_parts_trivial_usage
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61 | //usage: "[-a ARG]... [-u UMASK] "
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62 | //usage: IF_FEATURE_RUN_PARTS_LONG_OPTIONS("[--reverse] [--test] [--exit-on-error] "IF_FEATURE_RUN_PARTS_FANCY("[--list] "))
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63 | //usage: "DIRECTORY"
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64 | //usage:#define run_parts_full_usage "\n\n"
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65 | //usage: "Run a bunch of scripts in DIRECTORY\n"
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66 | //usage: "\n -a ARG Pass ARG as argument to scripts"
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67 | //usage: "\n -u UMASK Set UMASK before running scripts"
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68 | //usage: IF_FEATURE_RUN_PARTS_LONG_OPTIONS(
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69 | //usage: "\n --reverse Reverse execution order"
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70 | //usage: "\n --test Dry run"
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71 | //usage: "\n --exit-on-error Exit if a script exits with non-zero"
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72 | //usage: IF_FEATURE_RUN_PARTS_FANCY(
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73 | //usage: "\n --list Print names of matching files even if they are not executable"
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74 | //usage: )
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75 | //usage: )
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76 | //usage:
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77 | //usage:#define run_parts_example_usage
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78 | //usage: "$ run-parts -a start /etc/init.d\n"
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79 | //usage: "$ run-parts -a stop=now /etc/init.d\n\n"
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80 | //usage: "Let's assume you have a script foo/dosomething:\n"
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81 | //usage: "#!/bin/sh\n"
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82 | //usage: "for i in $*; do eval $i; done; unset i\n"
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83 | //usage: "case \"$1\" in\n"
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84 | //usage: "start*) echo starting something;;\n"
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85 | //usage: "stop*) set -x; shutdown -h $stop;;\n"
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86 | //usage: "esac\n\n"
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87 | //usage: "Running this yields:\n"
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88 | //usage: "$run-parts -a stop=+4m foo/\n"
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89 | //usage: "+ shutdown -h +4m"
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90 |
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91 | #include "libbb.h"
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92 | #include "common_bufsiz.h"
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93 |
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94 | struct globals {
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95 | char **names;
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96 | int cur;
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97 | char *cmd[2 /* using 1 provokes compiler warning */];
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98 | } FIX_ALIASING;
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99 | #define G (*(struct globals*)bb_common_bufsiz1)
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100 | #define names (G.names)
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101 | #define cur (G.cur )
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102 | #define cmd (G.cmd )
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103 | #define INIT_G() do { setup_common_bufsiz(); } while (0)
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104 |
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105 | enum { NUM_CMD = (COMMON_BUFSIZE - sizeof(G)) / sizeof(cmd[0]) - 1 };
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106 |
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107 | enum {
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108 | OPT_a = (1 << 0),
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109 | OPT_u = (1 << 1),
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110 | OPT_r = (1 << 2) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
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111 | OPT_t = (1 << 3) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
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112 | OPT_e = (1 << 4) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
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113 | OPT_l = (1 << 5) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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114 | * ENABLE_FEATURE_RUN_PARTS_FANCY,
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115 | };
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116 |
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117 | /* Is this a valid filename (upper/lower alpha, digits,
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118 | * underscores, and hyphens only?)
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119 | */
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120 | static bool invalid_name(const char *c)
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121 | {
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122 | c = bb_basename(c);
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123 |
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124 | while (*c && (isalnum(*c) || *c == '_' || *c == '-'))
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125 | c++;
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126 |
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127 | return *c; /* TRUE (!0) if terminating NUL is not reached */
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128 | }
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129 |
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130 | static int bb_alphasort(const void *p1, const void *p2)
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131 | {
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132 | int r = strcmp(*(char **) p1, *(char **) p2);
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133 | return (option_mask32 & OPT_r) ? -r : r;
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134 | }
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135 |
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136 | static int FAST_FUNC act(const char *file, struct stat *statbuf, void *args UNUSED_PARAM, int depth)
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137 | {
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138 | if (depth == 1)
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139 | return TRUE;
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140 |
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141 | if (depth == 2
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142 | && ( !(statbuf->st_mode & (S_IFREG | S_IFLNK))
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143 | || invalid_name(file)
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144 | || (!(option_mask32 & OPT_l) && access(file, X_OK) != 0))
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145 | ) {
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146 | return SKIP;
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147 | }
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148 |
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149 | names = xrealloc_vector(names, 4, cur);
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150 | names[cur++] = xstrdup(file);
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151 | /*names[cur] = NULL; - xrealloc_vector did it */
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152 |
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153 | return TRUE;
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154 | }
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155 |
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156 | #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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157 | static const char runparts_longopts[] ALIGN1 =
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158 | "arg\0" Required_argument "a"
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159 | "umask\0" Required_argument "u"
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160 | //TODO: "verbose\0" No_argument "v"
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161 | "reverse\0" No_argument "\xf0"
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162 | "test\0" No_argument "\xf1"
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163 | "exit-on-error\0" No_argument "\xf2"
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164 | #if ENABLE_FEATURE_RUN_PARTS_FANCY
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165 | "list\0" No_argument "\xf3"
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166 | #endif
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167 | ;
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168 | #endif
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169 |
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170 | int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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171 | int run_parts_main(int argc UNUSED_PARAM, char **argv)
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172 | {
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173 | const char *umask_p = "22";
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174 | llist_t *arg_list = NULL;
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175 | unsigned n;
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176 | int ret;
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177 |
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178 | INIT_G();
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179 |
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180 | #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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181 | applet_long_options = runparts_longopts;
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182 | #endif
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183 | /* We require exactly one argument: the directory name */
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184 | opt_complementary = "=1:a::";
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185 | getopt32(argv, "a:u:", &arg_list, &umask_p);
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186 |
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187 | umask(xstrtou_range(umask_p, 8, 0, 07777));
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188 |
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189 | n = 1;
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190 | while (arg_list && n < NUM_CMD) {
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191 | cmd[n++] = llist_pop(&arg_list);
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192 | }
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193 | /* cmd[n] = NULL; - is already zeroed out */
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194 |
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195 | /* run-parts has to sort executables by name before running them */
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196 |
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197 | recursive_action(argv[optind],
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198 | ACTION_RECURSE|ACTION_FOLLOWLINKS,
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199 | act, /* file action */
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200 | act, /* dir action */
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201 | NULL, /* user data */
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202 | 1 /* depth */
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203 | );
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204 |
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205 | if (!names)
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206 | return 0;
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207 |
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208 | qsort(names, cur, sizeof(char *), bb_alphasort);
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209 |
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210 | n = 0;
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211 | while (1) {
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212 | char *name = *names++;
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213 | if (!name)
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214 | break;
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215 | if (option_mask32 & (OPT_t | OPT_l)) {
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216 | puts(name);
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217 | continue;
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218 | }
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219 | cmd[0] = name;
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220 | ret = spawn_and_wait(cmd);
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221 | if (ret == 0)
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222 | continue;
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223 | n = 1;
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224 | if (ret < 0)
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225 | bb_perror_msg("can't execute '%s'", name);
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226 | else /* ret > 0 */
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227 | bb_error_msg("%s: exit status %u", name, ret & 0xff);
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228 |
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229 | if (option_mask32 & OPT_e)
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230 | xfunc_die();
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231 | }
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232 |
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233 | return n;
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234 | }
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