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 | *
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15 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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16 | */
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17 |
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18 | /* This is my first attempt to write a program in C (well, this is my first
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19 | * attempt to write a program! :-) . */
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20 |
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21 | /* This piece of code is heavily based on the original version of run-parts,
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22 | * taken from debian-utils. I've only removed the long options and a the
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23 | * report mode. As the original run-parts support only long options, I've
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24 | * broken compatibility because the BusyBox policy doesn't allow them.
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25 | * The supported options are:
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26 | * -t test. Print the name of the files to be executed, without
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27 | * execute them.
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28 | * -a ARG argument. Pass ARG as an argument the program executed. It can
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29 | * be repeated to pass multiple arguments.
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30 | * -u MASK umask. Set the umask of the program executed to MASK.
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31 | */
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32 |
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33 | #include "libbb.h"
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34 |
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35 | struct globals {
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36 | char **names;
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37 | int cur;
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38 | char *cmd[1];
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39 | } FIX_ALIASING;
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40 | #define G (*(struct globals*)&bb_common_bufsiz1)
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41 | #define names (G.names)
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42 | #define cur (G.cur )
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43 | #define cmd (G.cmd )
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44 |
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45 | enum { NUM_CMD = (COMMON_BUFSIZE - sizeof(G)) / sizeof(cmd[0]) - 1 };
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46 |
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47 | enum {
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48 | OPT_r = (1 << 0),
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49 | OPT_a = (1 << 1),
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50 | OPT_u = (1 << 2),
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51 | OPT_t = (1 << 3),
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52 | OPT_l = (1 << 4) * ENABLE_FEATURE_RUN_PARTS_FANCY,
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53 | };
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54 |
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55 | #if ENABLE_FEATURE_RUN_PARTS_FANCY
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56 | #define list_mode (option_mask32 & OPT_l)
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57 | #else
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58 | #define list_mode 0
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59 | #endif
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60 |
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61 | /* Is this a valid filename (upper/lower alpha, digits,
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62 | * underscores, and hyphens only?)
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63 | */
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64 | static bool invalid_name(const char *c)
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65 | {
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66 | c = bb_basename(c);
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67 |
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68 | while (*c && (isalnum(*c) || *c == '_' || *c == '-'))
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69 | c++;
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70 |
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71 | return *c; /* TRUE (!0) if terminating NUL is not reached */
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72 | }
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73 |
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74 | static int bb_alphasort(const void *p1, const void *p2)
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75 | {
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76 | int r = strcmp(*(char **) p1, *(char **) p2);
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77 | return (option_mask32 & OPT_r) ? -r : r;
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78 | }
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79 |
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80 | static int FAST_FUNC act(const char *file, struct stat *statbuf, void *args UNUSED_PARAM, int depth)
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81 | {
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82 | if (depth == 1)
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83 | return TRUE;
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84 |
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85 | if (depth == 2
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86 | && ( !(statbuf->st_mode & (S_IFREG | S_IFLNK))
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87 | || invalid_name(file)
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88 | || (!list_mode && access(file, X_OK) != 0))
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89 | ) {
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90 | return SKIP;
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91 | }
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92 |
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93 | names = xrealloc_vector(names, 4, cur);
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94 | names[cur++] = xstrdup(file);
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95 | /*names[cur] = NULL; - xrealloc_vector did it */
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96 |
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97 | return TRUE;
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98 | }
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99 |
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100 | #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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101 | static const char runparts_longopts[] ALIGN1 =
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102 | "arg\0" Required_argument "a"
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103 | "umask\0" Required_argument "u"
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104 | "test\0" No_argument "t"
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105 | #if ENABLE_FEATURE_RUN_PARTS_FANCY
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106 | "list\0" No_argument "l"
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107 | "reverse\0" No_argument "r"
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108 | //TODO: "verbose\0" No_argument "v"
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109 | #endif
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110 | ;
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111 | #endif
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112 |
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113 | int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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114 | int run_parts_main(int argc UNUSED_PARAM, char **argv)
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115 | {
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116 | const char *umask_p = "22";
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117 | llist_t *arg_list = NULL;
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118 | unsigned n;
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119 | int ret;
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120 |
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121 | #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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122 | applet_long_options = runparts_longopts;
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123 | #endif
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124 | /* We require exactly one argument: the directory name */
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125 | opt_complementary = "=1:a::";
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126 | getopt32(argv, "ra:u:t"IF_FEATURE_RUN_PARTS_FANCY("l"), &arg_list, &umask_p);
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127 |
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128 | umask(xstrtou_range(umask_p, 8, 0, 07777));
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129 |
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130 | n = 1;
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131 | while (arg_list && n < NUM_CMD) {
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132 | cmd[n++] = llist_pop(&arg_list);
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133 | }
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134 | /* cmd[n] = NULL; - is already zeroed out */
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135 |
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136 | /* run-parts has to sort executables by name before running them */
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137 |
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138 | recursive_action(argv[optind],
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139 | ACTION_RECURSE|ACTION_FOLLOWLINKS,
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140 | act, /* file action */
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141 | act, /* dir action */
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142 | NULL, /* user data */
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143 | 1 /* depth */
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144 | );
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145 |
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146 | if (!names)
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147 | return 0;
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148 |
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149 | qsort(names, cur, sizeof(char *), bb_alphasort);
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150 |
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151 | n = 0;
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152 | while (1) {
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153 | char *name = *names++;
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154 | if (!name)
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155 | break;
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156 | if (option_mask32 & (OPT_t | OPT_l)) {
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157 | puts(name);
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158 | continue;
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159 | }
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160 | cmd[0] = name;
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161 | ret = spawn_and_wait(cmd);
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162 | if (ret == 0)
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163 | continue;
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164 | n = 1;
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165 | if (ret < 0)
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166 | bb_perror_msg("can't execute '%s'", name);
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167 | else /* ret > 0 */
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168 | bb_error_msg("%s exited with code %d", name, ret & 0xff);
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169 | }
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170 |
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171 | return n;
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172 | }
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