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/* vi: set sw=4 ts=4: */
/*
* Mini run-parts implementation for busybox
*
* Copyright (C) 2007 Bernhard Reutner-Fischer
*
* Based on a older version that was in busybox which was 1k big.
* Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
*
* Based on the Debian run-parts program, version 1.15
* Copyright (C) 1996 Jeff Noxon <jeff@router.patch.net>,
* Copyright (C) 1996-1999 Guy Maor <maor@debian.org>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/* This is my first attempt to write a program in C (well, this is my first
* attempt to write a program! :-) . */
/* This piece of code is heavily based on the original version of run-parts,
* taken from debian-utils. I've only removed the long options and the
* report mode. As the original run-parts support only long options, I've
* broken compatibility because the BusyBox policy doesn't allow them.
*/
//config:config RUN_PARTS
//config: bool "run-parts (6.2 kb)"
//config: default y
//config: help
//config: run-parts is a utility designed to run all the scripts in a directory.
//config:
//config: It is useful to set up a directory like cron.daily, where you need to
//config: execute all the scripts in that directory.
//config:
//config: In this implementation of run-parts some features (such as report
//config: mode) are not implemented.
//config:
//config: Unless you know that run-parts is used in some of your scripts
//config: you can safely say N here.
//config:
//config:config FEATURE_RUN_PARTS_LONG_OPTIONS
//config: bool "Enable long options"
//config: default y
//config: depends on RUN_PARTS && LONG_OPTS
//config:
//config:config FEATURE_RUN_PARTS_FANCY
//config: bool "Support additional arguments"
//config: default y
//config: depends on RUN_PARTS
//config: help
//config: Support additional options:
//config: -l --list print the names of the all matching files (not
//config: limited to executables), but don't actually run them.
//applet:IF_RUN_PARTS(APPLET_ODDNAME(run-parts, run_parts, BB_DIR_BIN, BB_SUID_DROP, run_parts))
//kbuild:lib-$(CONFIG_RUN_PARTS) += run_parts.o
//usage:#define run_parts_trivial_usage
//usage: "[-a ARG]... [-u UMASK] "
//usage: IF_FEATURE_RUN_PARTS_LONG_OPTIONS("[--reverse] [--test] [--exit-on-error] "IF_FEATURE_RUN_PARTS_FANCY("[--list] "))
//usage: "DIRECTORY"
//usage:#define run_parts_full_usage "\n\n"
//usage: "Run a bunch of scripts in DIRECTORY\n"
//usage: "\n -a ARG Pass ARG as argument to scripts"
//usage: "\n -u UMASK Set UMASK before running scripts"
//usage: IF_FEATURE_RUN_PARTS_LONG_OPTIONS(
//usage: "\n --reverse Reverse execution order"
//usage: "\n --test Dry run"
//usage: "\n --exit-on-error Exit if a script exits with non-zero"
//usage: IF_FEATURE_RUN_PARTS_FANCY(
//usage: "\n --list Print names of matching files even if they are not executable"
//usage: )
//usage: )
//usage:
//usage:#define run_parts_example_usage
//usage: "$ run-parts -a start /etc/init.d\n"
//usage: "$ run-parts -a stop=now /etc/init.d\n\n"
//usage: "Let's assume you have a script foo/dosomething:\n"
//usage: "#!/bin/sh\n"
//usage: "for i in $*; do eval $i; done; unset i\n"
//usage: "case \"$1\" in\n"
//usage: "start*) echo starting something;;\n"
//usage: "stop*) set -x; shutdown -h $stop;;\n"
//usage: "esac\n\n"
//usage: "Running this yields:\n"
//usage: "$run-parts -a stop=+4m foo/\n"
//usage: "+ shutdown -h +4m"
#include "libbb.h"
#include "common_bufsiz.h"
struct globals {
char **names;
int cur;
char *cmd[2 /* using 1 provokes compiler warning */];
} FIX_ALIASING;
#define G (*(struct globals*)bb_common_bufsiz1)
#define names (G.names)
#define cur (G.cur )
#define cmd (G.cmd )
#define INIT_G() do { setup_common_bufsiz(); } while (0)
enum { NUM_CMD = (COMMON_BUFSIZE - sizeof(G)) / sizeof(cmd[0]) - 1 };
enum {
OPT_a = (1 << 0),
OPT_u = (1 << 1),
OPT_r = (1 << 2) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
OPT_t = (1 << 3) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
OPT_e = (1 << 4) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
OPT_l = (1 << 5) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
* ENABLE_FEATURE_RUN_PARTS_FANCY,
};
/* Is this a valid filename (upper/lower alpha, digits,
* underscores, hyphens, and non-leading dots only?)
*/
static bool invalid_name(const char *c)
{
c = bb_basename(c);
if (*c == '.')
return *c;
/* Debian run-parts 4.8.3, manpage:
* "...the names must consist entirely of ASCII letters,
* ASCII digits, ASCII underscores, and ASCII minus-hyphens.
* However, the name must not begin with a period."
* The last sentence is a giveaway that something is fishy
* (why mention leading dot if dots are not allowed anyway?).
* Yes, you guessed it right: in fact non-leading dots ARE allowed.
*/
while (isalnum(*c) || *c == '_' || *c == '-' || *c == '.')
c++;
return *c; /* TRUE (!0) if terminating NUL is not reached */
}
static int bb_alphasort(const void *p1, const void *p2)
{
int r = strcmp(*(char **) p1, *(char **) p2);
return (option_mask32 & OPT_r) ? -r : r;
}
static int FAST_FUNC act(struct recursive_state *state,
const char *file, struct stat *statbuf)
{
if (state->depth == 0)
return TRUE;
if (state->depth == 1
&& ( !(statbuf->st_mode & (S_IFREG | S_IFLNK))
|| invalid_name(file)
|| (!(option_mask32 & OPT_l) && access(file, X_OK) != 0))
) {
return SKIP;
}
names = xrealloc_vector(names, 4, cur);
names[cur++] = xstrdup(file);
/*names[cur] = NULL; - xrealloc_vector did it */
return TRUE;
}
#if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
static const char runparts_longopts[] ALIGN1 =
"arg\0" Required_argument "a"
"umask\0" Required_argument "u"
//TODO: "verbose\0" No_argument "v"
"reverse\0" No_argument "\xf0"
"test\0" No_argument "\xf1"
"exit-on-error\0" No_argument "\xf2"
# if ENABLE_FEATURE_RUN_PARTS_FANCY
"list\0" No_argument "\xf3"
# endif
;
# define GETOPT32 getopt32long
# define LONGOPTS ,runparts_longopts
#else
# define GETOPT32 getopt32
# define LONGOPTS
#endif
int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int run_parts_main(int argc UNUSED_PARAM, char **argv)
{
const char *umask_p = "22";
llist_t *arg_list = NULL;
unsigned n;
int ret;
INIT_G();
/* We require exactly one argument: the directory name */
GETOPT32(argv, "^" "a:*u:" "\0" "=1" LONGOPTS,
&arg_list, &umask_p
);
umask(xstrtou_range(umask_p, 8, 0, 07777));
n = 1;
while (arg_list && n < NUM_CMD) {
cmd[n++] = llist_pop(&arg_list);
}
/* cmd[n] = NULL; - is already zeroed out */
/* run-parts has to sort executables by name before running them */
recursive_action(argv[optind],
ACTION_RECURSE|ACTION_FOLLOWLINKS,
act, /* file action */
act, /* dir action */
NULL /* user data */
);
if (!names)
return 0;
qsort(names, cur, sizeof(char *), bb_alphasort);
n = 0;
while (1) {
char *name = *names++;
if (!name)
break;
if (option_mask32 & (OPT_t | OPT_l)) {
puts(name);
continue;
}
cmd[0] = name;
ret = spawn_and_wait(cmd);
if (ret == 0)
continue;
n = 1;
if (ret < 0)
bb_perror_msg("can't execute '%s'", name);
else /* ret > 0 */
bb_error_msg("%s: exit status %u", name, ret & 0xff);
if (option_mask32 & OPT_e)
xfunc_die();
}
return n;
}
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