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    Contents of /trunk/mkinitrd-magellan/busybox/debianutils/run_parts.c

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    Revision 984 - (show annotations) (download)
    Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
    File MIME type: text/plain
    File size: 4488 byte(s) 
    -updated to busybox-1.16.1 and enabled blkid/uuid support in default config
    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 GPL v2 or later, see file LICENSE in this tarball for details.
    16 */
    17
    18 /* This is my first attempt to write a program in C (well, this is my first
    19 * attempt to write a program! :-) . */
    20
    21 /* This piece of code is heavily based on the original version of run-parts,
    22 * taken from debian-utils. I've only removed the long options and a the
    23 * report mode. As the original run-parts support only long options, I've
    24 * broken compatibility because the BusyBox policy doesn't allow them.
    25 * The supported options are:
    26 * -t test. Print the name of the files to be executed, without
    27 * execute them.
    28 * -a ARG argument. Pass ARG as an argument the program executed. It can
    29 * be repeated to pass multiple arguments.
    30 * -u MASK umask. Set the umask of the program executed to MASK.
    31 */
    32
    33 #include "libbb.h"
    34
    35 struct globals {
    36 char **names;
    37 int cur;
    38 char *cmd[1];
    39 };
    40 #define G (*(struct globals*)&bb_common_bufsiz1)
    41 #define names (G.names)
    42 #define cur (G.cur )
    43 #define cmd (G.cmd )
    44
    45 enum { NUM_CMD = (COMMON_BUFSIZE - sizeof(G)) / sizeof(cmd[0]) - 1 };
    46
    47 enum {
    48 OPT_r = (1 << 0),
    49 OPT_a = (1 << 1),
    50 OPT_u = (1 << 2),
    51 OPT_t = (1 << 3),
    52 OPT_l = (1 << 4) * ENABLE_FEATURE_RUN_PARTS_FANCY,
    53 };
    54
    55 #if ENABLE_FEATURE_RUN_PARTS_FANCY
    56 #define list_mode (option_mask32 & OPT_l)
    57 #else
    58 #define list_mode 0
    59 #endif
    60
    61 /* Is this a valid filename (upper/lower alpha, digits,
    62 * underscores, and hyphens only?)
    63 */
    64 static bool invalid_name(const char *c)
    65 {
    66 c = bb_basename(c);
    67
    68 while (*c && (isalnum(*c) || *c == '_' || *c == '-'))
    69 c++;
    70
    71 return *c; /* TRUE (!0) if terminating NUL is not reached */
    72 }
    73
    74 static int bb_alphasort(const void *p1, const void *p2)
    75 {
    76 int r = strcmp(*(char **) p1, *(char **) p2);
    77 return (option_mask32 & OPT_r) ? -r : r;
    78 }
    79
    80 static int FAST_FUNC act(const char *file, struct stat *statbuf, void *args UNUSED_PARAM, int depth)
    81 {
    82 if (depth == 1)
    83 return TRUE;
    84
    85 if (depth == 2
    86 && ( !(statbuf->st_mode & (S_IFREG | S_IFLNK))
    87 || invalid_name(file)
    88 || (!list_mode && access(file, X_OK) != 0))
    89 ) {
    90 return SKIP;
    91 }
    92
    93 names = xrealloc_vector(names, 4, cur);
    94 names[cur++] = xstrdup(file);
    95 /*names[cur] = NULL; - xrealloc_vector did it */
    96
    97 return TRUE;
    98 }
    99
    100 #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
    101 static const char runparts_longopts[] ALIGN1 =
    102 "arg\0" Required_argument "a"
    103 "umask\0" Required_argument "u"
    104 "test\0" No_argument "t"
    105 #if ENABLE_FEATURE_RUN_PARTS_FANCY
    106 "list\0" No_argument "l"
    107 "reverse\0" No_argument "r"
    108 //TODO: "verbose\0" No_argument "v"
    109 #endif
    110 ;
    111 #endif
    112
    113 int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
    114 int run_parts_main(int argc UNUSED_PARAM, char **argv)
    115 {
    116 const char *umask_p = "22";
    117 llist_t *arg_list = NULL;
    118 unsigned n;
    119 int ret;
    120
    121 #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
    122 applet_long_options = runparts_longopts;
    123 #endif
    124 /* We require exactly one argument: the directory name */
    125 /* We require exactly one argument: the directory name */
    126 opt_complementary = "=1:a::";
    127 getopt32(argv, "ra:u:t"IF_FEATURE_RUN_PARTS_FANCY("l"), &arg_list, &umask_p);
    128
    129 umask(xstrtou_range(umask_p, 8, 0, 07777));
    130
    131 n = 1;
    132 while (arg_list && n < NUM_CMD) {
    133 cmd[n++] = llist_pop(&arg_list);
    134 }
    135 /* cmd[n] = NULL; - is already zeroed out */
    136
    137 /* run-parts has to sort executables by name before running them */
    138
    139 recursive_action(argv[optind],
    140 ACTION_RECURSE|ACTION_FOLLOWLINKS,
    141 act, /* file action */
    142 act, /* dir action */
    143 NULL, /* user data */
    144 1 /* depth */
    145 );
    146
    147 if (!names)
    148 return 0;
    149
    150 qsort(names, cur, sizeof(char *), bb_alphasort);
    151
    152 n = 0;
    153 while (1) {
    154 char *name = *names++;
    155 if (!name)
    156 break;
    157 if (option_mask32 & (OPT_t | OPT_l)) {
    158 puts(name);
    159 continue;
    160 }
    161 cmd[0] = name;
    162 ret = wait4pid(spawn(cmd));
    163 if (ret == 0)
    164 continue;
    165 n = 1;
    166 if (ret < 0)
    167 bb_perror_msg("can't execute '%s'", name);
    168 else /* ret > 0 */
    169 bb_error_msg("%s exited with code %d", name, ret);
    170 }
    171
    172 return n;
    173 }