mirror of
https://github.com/sheumann/hush.git
synced 2024-08-17 00:29:03 +00:00
295 lines
7.4 KiB
C
295 lines
7.4 KiB
C
|
/* vi: set sw=4 ts=4: */
|
||
|
/*
|
||
|
* Mini run-parts implementation for busybox
|
||
|
*
|
||
|
*
|
||
|
* 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>
|
||
|
*
|
||
|
*
|
||
|
* This program is free software; you can redistribute it and/or modify
|
||
|
* it under the terms of the GNU General Public License as published by
|
||
|
* the Free Software Foundation; either version 2 of the License, or
|
||
|
* (at your option) any later version.
|
||
|
*
|
||
|
* This program is distributed in the hope that it will be useful,
|
||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
* General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License
|
||
|
* along with this program; if not, write to the Free Software
|
||
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
|
* 02111-1307 USA
|
||
|
*
|
||
|
*/
|
||
|
|
||
|
/* 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 a the
|
||
|
* report mode. As the original run-parts support only long options, I've
|
||
|
* broken compatibility because the BusyBox policy doesn't allow them.
|
||
|
* The supported options are:
|
||
|
* -t test. Print the name of the files to be executed, without
|
||
|
* execute them.
|
||
|
* -a ARG argument. Pass ARG as an argument the program executed. It can
|
||
|
* be repeated to pass multiple arguments.
|
||
|
* -u MASK umask. Set the umask of the program executed to MASK. */
|
||
|
|
||
|
/* TODO
|
||
|
* done - convert calls to error in perror... and remove error()
|
||
|
* done - convert malloc/realloc to their x... counterparts
|
||
|
* done - remove catch_sigchld
|
||
|
* use bb's isdirectory() ? It seems that no applet use it.
|
||
|
* done - use bb's concat_path_file()
|
||
|
* declare run_parts_main() as extern and any other function as static? */
|
||
|
|
||
|
#include <stdio.h>
|
||
|
#include <stdarg.h>
|
||
|
#include <stdlib.h>
|
||
|
/* #include <sys/types.h> */
|
||
|
#include <sys/wait.h>
|
||
|
#include <dirent.h>
|
||
|
#include <sys/stat.h>
|
||
|
#include <unistd.h>
|
||
|
#include <getopt.h>
|
||
|
#include <string.h>
|
||
|
#include <errno.h>
|
||
|
#include <ctype.h>
|
||
|
/* #include <signal.h>
|
||
|
#include <sys/time.h> */
|
||
|
|
||
|
#include "busybox.h"
|
||
|
|
||
|
int test_mode = 0;
|
||
|
int verbose_mode = 0;
|
||
|
int exitstatus = 0;
|
||
|
|
||
|
int argcount = 0, argsize = 0;
|
||
|
char **args = 0;
|
||
|
|
||
|
|
||
|
/* set_umask */
|
||
|
/* Check and set the umask of the program executed. As stated in the original
|
||
|
* run-parts, the octal conversion in libc is not foolproof; it will take the
|
||
|
* 8 and 9 digits under some circumstances. We'll just have to live with it.
|
||
|
*/
|
||
|
|
||
|
void set_umask (void)
|
||
|
{
|
||
|
int mask, result;
|
||
|
|
||
|
/*TODO
|
||
|
* We must substitute sscanf, according to bb's style guide? */
|
||
|
result = sscanf (optarg, "%o", &mask);
|
||
|
if ((result != 1) || (mask > 07777) || (mask < 0)) {
|
||
|
perror_msg_and_die ("bad umask value");
|
||
|
}
|
||
|
|
||
|
umask (mask);
|
||
|
}
|
||
|
|
||
|
/* add_argument */
|
||
|
/* Add an argument to the commands that we will call. Called once for
|
||
|
every argument. */
|
||
|
void add_argument (char *newarg)
|
||
|
{
|
||
|
if (argcount+1 >= argsize) {
|
||
|
argsize = argsize ? argsize*2 : 4;
|
||
|
/*TODO if we convert to xrealloc we lose the verbose error message */
|
||
|
args = realloc(args, argsize * (sizeof(char*)));
|
||
|
if (!args) {
|
||
|
perror_msg_and_die ("failed to reallocate memory for arguments: %s", strerror(errno));
|
||
|
}
|
||
|
}
|
||
|
args[argcount++] = newarg;
|
||
|
args[argcount] = 0;
|
||
|
}
|
||
|
|
||
|
/* valid_name */
|
||
|
/* True or false? Is this a valid filename (upper/lower alpha, digits,
|
||
|
* underscores, and hyphens only?)
|
||
|
*/
|
||
|
|
||
|
int valid_name (const struct dirent *d)
|
||
|
{
|
||
|
char *c = d->d_name;
|
||
|
while (*c) {
|
||
|
if (!isalnum(*c) && *c!='_' && *c!='-') {
|
||
|
return 0;
|
||
|
}
|
||
|
++c;
|
||
|
}
|
||
|
return 1;
|
||
|
}
|
||
|
|
||
|
|
||
|
/* run_part */
|
||
|
/* Execute a file */
|
||
|
|
||
|
void run_part (char *progname)
|
||
|
{
|
||
|
int result;
|
||
|
int pid;
|
||
|
|
||
|
|
||
|
if ((pid=fork()) < 0) {
|
||
|
perror_msg_and_die ("failed to fork: %s", strerror(errno));
|
||
|
}
|
||
|
else if (!pid) {
|
||
|
args[0] = progname;
|
||
|
execv (progname, args);
|
||
|
perror_msg_and_die ("failed to exec %s: %s", progname, strerror (errno));
|
||
|
}
|
||
|
|
||
|
if (0) {
|
||
|
|
||
|
} else {
|
||
|
|
||
|
waitpid(pid, &result, 0);
|
||
|
}
|
||
|
|
||
|
if (WIFEXITED (result) && WEXITSTATUS(result)) {
|
||
|
perror_msg ("%s exited with return code %d", progname, WEXITSTATUS(result));
|
||
|
exitstatus = 1;
|
||
|
}
|
||
|
else if (WIFSIGNALED (result)) {
|
||
|
perror_msg ("%s exited because of uncaught signal %d", progname,
|
||
|
WTERMSIG(result));
|
||
|
exitstatus = 1;
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* run_parts */
|
||
|
/* Find the parts to run & call run_part() */
|
||
|
|
||
|
void run_parts (char *dir_name)
|
||
|
{
|
||
|
struct dirent **namelist;
|
||
|
char *filename = NULL;
|
||
|
size_t filename_length, dir_name_length;
|
||
|
int entries, i, result;
|
||
|
struct stat st;
|
||
|
|
||
|
/* dir_name + "/" */
|
||
|
dir_name_length = strlen(dir_name) + 1;
|
||
|
|
||
|
/* dir_name + "/" + ".." + "\0" (This will save one realloc.) */
|
||
|
filename_length = dir_name_length + 2 + 1;
|
||
|
|
||
|
/* --
|
||
|
* Removed this part because I want try to use concat_path_file() */
|
||
|
|
||
|
/* if (! (filename = malloc(filename_length))) {
|
||
|
error ("failed to allocate memory for path: %s", strerror(errno));
|
||
|
exit (1);
|
||
|
} */
|
||
|
|
||
|
/* -- */
|
||
|
|
||
|
/* scandir() isn't POSIX, but it makes things easy. */
|
||
|
entries = scandir (dir_name, &namelist, valid_name, alphasort);
|
||
|
|
||
|
if (entries < 0) {
|
||
|
perror_msg_and_die ("failed to open directory %s: %s", dir_name, strerror (errno));
|
||
|
}
|
||
|
|
||
|
for (i = 0; i < entries; i++) {
|
||
|
|
||
|
/* --
|
||
|
* Removed this part because I want try to use concat_path_file() */
|
||
|
|
||
|
/* if (filename_length < dir_name_length + strlen(namelist[i]->d_name) + 1) {
|
||
|
filename_length = dir_name_length + strlen(namelist[i]->d_name) + 1;
|
||
|
if (!(filename = realloc(filename, filename_length))) {
|
||
|
error ("failed to reallocate memory for path: %s", strerror(errno));
|
||
|
exit (1);
|
||
|
}
|
||
|
}
|
||
|
|
||
|
*/
|
||
|
|
||
|
/* -- */
|
||
|
|
||
|
|
||
|
/* --
|
||
|
* Removed for concat_path_file() */
|
||
|
|
||
|
/* strcpy (filename, dir_name);
|
||
|
strcat (filename, "/");
|
||
|
strcat (filename, namelist[i]->d_name); */
|
||
|
|
||
|
/* -- */
|
||
|
|
||
|
filename = concat_path_file (dir_name, namelist[i]->d_name);
|
||
|
|
||
|
result = stat (filename, &st);
|
||
|
if (result < 0) {
|
||
|
perror_msg_and_die ("failed to stat component %s: %s", filename,
|
||
|
strerror (errno));
|
||
|
}
|
||
|
if (S_ISREG(st.st_mode) && !access (filename, X_OK)) {
|
||
|
if (test_mode)
|
||
|
printf ("run-parts would run %s\n", filename);
|
||
|
else {
|
||
|
run_part (filename);
|
||
|
}
|
||
|
}
|
||
|
/*TODO convert to isdirectory() */
|
||
|
else if (!S_ISDIR(st.st_mode)) {
|
||
|
printf ("run-parts: component %s is not an executable plain file\n",
|
||
|
filename);
|
||
|
exitstatus = 1;
|
||
|
}
|
||
|
|
||
|
free (namelist[i]);
|
||
|
}
|
||
|
free (namelist);
|
||
|
free (filename);
|
||
|
}
|
||
|
|
||
|
/* run_parts_main */
|
||
|
/* Process options */
|
||
|
int run_parts_main (int argc, char *argv[])
|
||
|
{
|
||
|
umask (022);
|
||
|
add_argument(0);
|
||
|
|
||
|
for (;;) {
|
||
|
int c;
|
||
|
|
||
|
opterr = 0;
|
||
|
c = getopt(argc, argv, "tu:a:");
|
||
|
|
||
|
if (c == EOF)
|
||
|
break;
|
||
|
switch (c) {
|
||
|
case 't': /* Enable test mode */
|
||
|
test_mode = 1;
|
||
|
break;
|
||
|
case 'u': /* Set the umask of the programs executed */
|
||
|
set_umask ();
|
||
|
break;
|
||
|
case 'a': /* Pass an argument to the programs */
|
||
|
add_argument (optarg);
|
||
|
break;
|
||
|
default:
|
||
|
show_usage();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* We require exactly one argument: the directory name */
|
||
|
if (optind != (argc - 1)) {
|
||
|
show_usage();
|
||
|
}
|
||
|
|
||
|
run_parts (argv[optind]);
|
||
|
|
||
|
return exitstatus;
|
||
|
}
|