236 lines
6.8 KiB
C
236 lines
6.8 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini run-parts implementation for busybox
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*
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* Copyright (C) 2007 Bernhard Reutner-Fischer
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*
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* Based on a older version that was in busybox which was 1k big.
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* Copyright (C) 2001 by Emanuele Aina <emanuele.aina@tiscali.it>
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*
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* Based on the Debian run-parts program, version 1.15
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* Copyright (C) 1996 Jeff Noxon <jeff@router.patch.net>,
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* Copyright (C) 1996-1999 Guy Maor <maor@debian.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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/* This is my first attempt to write a program in C (well, this is my first
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* attempt to write a program! :-) . */
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/* This piece of code is heavily based on the original version of run-parts,
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* taken from debian-utils. I've only removed the long options and the
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* report mode. As the original run-parts support only long options, I've
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* broken compatibility because the BusyBox policy doesn't allow them.
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*/
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//config:config RUN_PARTS
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//config: bool "run-parts (6.1 kb)"
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//config: default y
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//config: help
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//config: run-parts is a utility designed to run all the scripts in a directory.
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//config:
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//config: It is useful to set up a directory like cron.daily, where you need to
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//config: execute all the scripts in that directory.
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//config:
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//config: In this implementation of run-parts some features (such as report
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//config: mode) are not implemented.
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//config:
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//config: Unless you know that run-parts is used in some of your scripts
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//config: you can safely say N here.
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//config:
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//config:config FEATURE_RUN_PARTS_LONG_OPTIONS
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//config: bool "Enable long options"
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//config: default y
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//config: depends on RUN_PARTS && LONG_OPTS
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//config:
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//config:config FEATURE_RUN_PARTS_FANCY
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//config: bool "Support additional arguments"
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//config: default y
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//config: depends on RUN_PARTS
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//config: help
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//config: Support additional options:
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//config: -l --list print the names of the all matching files (not
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//config: limited to executables), but don't actually run them.
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//applet:IF_RUN_PARTS(APPLET_ODDNAME(run-parts, run_parts, BB_DIR_BIN, BB_SUID_DROP, run_parts))
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//kbuild:lib-$(CONFIG_RUN_PARTS) += run_parts.o
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//usage:#define run_parts_trivial_usage
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//usage: "[-a ARG]... [-u UMASK] "
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//usage: IF_FEATURE_RUN_PARTS_LONG_OPTIONS("[--reverse] [--test] [--exit-on-error] "IF_FEATURE_RUN_PARTS_FANCY("[--list] "))
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//usage: "DIRECTORY"
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//usage:#define run_parts_full_usage "\n\n"
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//usage: "Run a bunch of scripts in DIRECTORY\n"
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//usage: "\n -a ARG Pass ARG as argument to scripts"
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//usage: "\n -u UMASK Set UMASK before running scripts"
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//usage: IF_FEATURE_RUN_PARTS_LONG_OPTIONS(
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//usage: "\n --reverse Reverse execution order"
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//usage: "\n --test Dry run"
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//usage: "\n --exit-on-error Exit if a script exits with non-zero"
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//usage: IF_FEATURE_RUN_PARTS_FANCY(
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//usage: "\n --list Print names of matching files even if they are not executable"
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//usage: )
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//usage: )
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//usage:
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//usage:#define run_parts_example_usage
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//usage: "$ run-parts -a start /etc/init.d\n"
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//usage: "$ run-parts -a stop=now /etc/init.d\n\n"
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//usage: "Let's assume you have a script foo/dosomething:\n"
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//usage: "#!/bin/sh\n"
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//usage: "for i in $*; do eval $i; done; unset i\n"
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//usage: "case \"$1\" in\n"
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//usage: "start*) echo starting something;;\n"
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//usage: "stop*) set -x; shutdown -h $stop;;\n"
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//usage: "esac\n\n"
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//usage: "Running this yields:\n"
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//usage: "$run-parts -a stop=+4m foo/\n"
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//usage: "+ shutdown -h +4m"
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#include "libbb.h"
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#include "common_bufsiz.h"
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struct globals {
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char **names;
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int cur;
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char *cmd[2 /* using 1 provokes compiler warning */];
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} FIX_ALIASING;
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#define G (*(struct globals*)bb_common_bufsiz1)
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#define names (G.names)
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#define cur (G.cur )
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#define cmd (G.cmd )
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#define INIT_G() do { setup_common_bufsiz(); } while (0)
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enum { NUM_CMD = (COMMON_BUFSIZE - sizeof(G)) / sizeof(cmd[0]) - 1 };
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enum {
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OPT_a = (1 << 0),
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OPT_u = (1 << 1),
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OPT_r = (1 << 2) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
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OPT_t = (1 << 3) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
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OPT_e = (1 << 4) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS,
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OPT_l = (1 << 5) * ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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* ENABLE_FEATURE_RUN_PARTS_FANCY,
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};
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/* Is this a valid filename (upper/lower alpha, digits,
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* underscores, and hyphens only?)
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*/
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static bool invalid_name(const char *c)
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{
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c = bb_basename(c);
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while (*c && (isalnum(*c) || *c == '_' || *c == '-'))
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c++;
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return *c; /* TRUE (!0) if terminating NUL is not reached */
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}
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static int bb_alphasort(const void *p1, const void *p2)
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{
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int r = strcmp(*(char **) p1, *(char **) p2);
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return (option_mask32 & OPT_r) ? -r : r;
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}
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static int FAST_FUNC act(const char *file, struct stat *statbuf, void *args UNUSED_PARAM, int depth)
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{
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if (depth == 1)
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return TRUE;
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if (depth == 2
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&& ( !(statbuf->st_mode & (S_IFREG | S_IFLNK))
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|| invalid_name(file)
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|| (!(option_mask32 & OPT_l) && access(file, X_OK) != 0))
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) {
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return SKIP;
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}
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names = xrealloc_vector(names, 4, cur);
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names[cur++] = xstrdup(file);
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/*names[cur] = NULL; - xrealloc_vector did it */
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return TRUE;
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}
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#if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
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static const char runparts_longopts[] ALIGN1 =
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"arg\0" Required_argument "a"
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"umask\0" Required_argument "u"
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//TODO: "verbose\0" No_argument "v"
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"reverse\0" No_argument "\xf0"
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"test\0" No_argument "\xf1"
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"exit-on-error\0" No_argument "\xf2"
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# if ENABLE_FEATURE_RUN_PARTS_FANCY
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"list\0" No_argument "\xf3"
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# endif
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;
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# define GETOPT32 getopt32long
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# define LONGOPTS ,runparts_longopts
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#else
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# define GETOPT32 getopt32
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# define LONGOPTS
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#endif
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int run_parts_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int run_parts_main(int argc UNUSED_PARAM, char **argv)
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{
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const char *umask_p = "22";
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llist_t *arg_list = NULL;
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unsigned n;
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int ret;
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INIT_G();
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/* We require exactly one argument: the directory name */
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GETOPT32(argv, "^" "a:*u:" "\0" "=1" LONGOPTS,
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&arg_list, &umask_p
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);
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umask(xstrtou_range(umask_p, 8, 0, 07777));
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n = 1;
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while (arg_list && n < NUM_CMD) {
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cmd[n++] = llist_pop(&arg_list);
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}
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/* cmd[n] = NULL; - is already zeroed out */
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/* run-parts has to sort executables by name before running them */
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recursive_action(argv[optind],
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ACTION_RECURSE|ACTION_FOLLOWLINKS,
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act, /* file action */
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act, /* dir action */
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NULL, /* user data */
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1 /* depth */
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);
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if (!names)
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return 0;
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qsort(names, cur, sizeof(char *), bb_alphasort);
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n = 0;
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while (1) {
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char *name = *names++;
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if (!name)
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break;
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if (option_mask32 & (OPT_t | OPT_l)) {
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puts(name);
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continue;
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}
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cmd[0] = name;
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ret = spawn_and_wait(cmd);
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if (ret == 0)
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continue;
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n = 1;
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if (ret < 0)
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bb_perror_msg("can't execute '%s'", name);
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else /* ret > 0 */
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bb_error_msg("%s: exit status %u", name, ret & 0xff);
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if (option_mask32 & OPT_e)
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xfunc_die();
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}
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return n;
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}
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