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/* vi: set sw=4 ts=4: */
/*
* Mini chown/chmod/chgrp implementation for busybox
*
*
* Copyright (C) 1999 by Lineo, inc.
* Written by Erik Andersen <andersen@lineo.com>, <andersee@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
*
*/
#include "internal.h"
#define BB_DECLARE_EXTERN
#define bb_need_invalid_option
#include "messages.c"
#include <stdio.h>
#include <grp.h>
#include <pwd.h>
static uid_t uid = -1;
static gid_t gid = -1;
static int whichApp;
static char *invocationName = NULL;
static char *theMode = NULL;
#define CHGRP_APP 1
#define CHOWN_APP 2
#define CHMOD_APP 3
static const char chgrp_usage[] = "chgrp [OPTION]... GROUP FILE...\n\n"
"Change the group membership of each FILE to GROUP.\n"
"\nOptions:\n\t-R\tchange files and directories recursively\n";
static const char chown_usage[] =
"chown [OPTION]... OWNER[.[GROUP] FILE...\n\n"
"Change the owner and/or group of each FILE to OWNER and/or GROUP.\n"
"\nOptions:\n\t-R\tchange files and directories recursively\n";
static const char chmod_usage[] =
"chmod [-R] MODE[,MODE]... FILE...\n\n"
"Each MODE is one or more of the letters ugoa, one of the symbols +-= and\n"
"one or more of the letters rwxst.\n\n"
"\nOptions:\n\t-R\tchange files and directories recursively.\n";
static int fileAction(const char *fileName, struct stat *statbuf)
{
switch (whichApp) {
case CHGRP_APP:
case CHOWN_APP:
#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
if (lchown
(fileName, (whichApp == CHOWN_APP) ? uid : statbuf->st_uid,
(gid == -1) ? statbuf->st_gid : gid) == 0)
#else
if (chown
(fileName, (whichApp == CHOWN_APP) ? uid : statbuf->st_uid,
(gid == -1) ? statbuf->st_gid : gid) == 0)
#endif
{
return (TRUE);
}
break;
case CHMOD_APP:
/* Parse the specified modes */
if (parse_mode(theMode, &(statbuf->st_mode)) == FALSE) {
fatalError( "%s: unknown mode: %s\n", invocationName, theMode);
}
if (chmod(fileName, statbuf->st_mode) == 0)
return (TRUE);
break;
}
perror(fileName);
return (FALSE);
}
int chmod_chown_chgrp_main(int argc, char **argv)
{
int recursiveFlag = FALSE;
char *groupName;
char *p;
const char *appUsage;
whichApp =
(strcmp(*argv, "chown") == 0)?
CHOWN_APP : (strcmp(*argv, "chmod") == 0)?
CHMOD_APP : CHGRP_APP;
appUsage =
(whichApp == CHOWN_APP)?
chown_usage : (whichApp == CHMOD_APP) ? chmod_usage : chgrp_usage;
if (argc < 2)
usage(appUsage);
invocationName = *argv;
argc--;
argv++;
/* Parse options */
while (**argv == '-') {
while (*++(*argv))
switch (**argv) {
case 'R':
recursiveFlag = TRUE;
break;
default:
fprintf(stderr, invalid_option, invocationName, **argv);
usage(appUsage);
}
argc--;
argv++;
}
if (whichApp == CHMOD_APP) {
theMode = *argv;
} else {
/* Find the selected group */
if (whichApp == CHGRP_APP) {
groupName = *argv;
gid = strtoul(groupName, &p, 10); /* maybe it's already numeric */
if (groupName == p)
gid = my_getgrnam(groupName);
if (gid == -1)
goto bad_group;
} else {
groupName = strchr(*argv, '.');
if (groupName) {
*groupName++ = '\0';
gid = strtoul(groupName, &p, 10);
if (groupName == p)
gid = my_getgrnam(groupName);
if (gid == -1)
goto bad_group;
} else
gid = -1;
}
/* Find the selected user (if appropriate) */
if (whichApp == CHOWN_APP) {
uid = strtoul(*argv, &p, 10); /* if numeric ... */
if (*argv == p)
uid = my_getpwnam(*argv);
if (uid == -1) {
fatalError( "%s: unknown user name: %s\n",
invocationName, *argv);
}
}
}
/* Ok, ready to do the deed now */
if (argc <= 1) {
fatalError( "%s: too few arguments\n", invocationName);
}
while (argc-- > 1) {
if (recursiveAction
(*(++argv), recursiveFlag, TRUE, FALSE, fileAction,
fileAction) == FALSE)
exit(FALSE);
}
exit(TRUE);
bad_group:
fatalError( "%s: unknown group name: %s\n", invocationName, groupName);
}
|
