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run_parts.c 4.3 KB

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