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This commit is contained in:
Eric Andersen
1999-10-13 18:56:42 +00:00
parent 21943ce641
commit 1b61f41f57
10 changed files with 526 additions and 205 deletions
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157
chmod.c
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@@ -1,41 +1,54 @@
#include <stdlib.h>
/*
* Mini chmod implementation for busybox
*
* Copyright (C) 1998 by Erik Andersen <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 <stdio.h>
#include <unistd.h>
#include <sys/stat.h>
#include <grp.h>
#include <pwd.h>
#include "internal.h"
const char chmod_usage[] = "chmod [-R] mode file [file ...]\n"
"\nmode may be an octal integer representing the bit pattern for the\n"
"\tnew mode, or a symbolic value matching the pattern\n"
"\t[ugoa]{+|-|=}[rwxst] .\n"
"\t\tu:\tUser\n"
"\t\tg:\tGroup\n"
"\t\to:\tOthers\n"
"\t\ta:\tAll\n"
"\n"
"\n+:\tAdd privilege\n"
"\n-:\tRemove privilege\n"
"\n=:\tSet privilege\n"
"\n"
"\t\tr:\tRead\n"
"\t\tw:\tWrite\n"
"\t\tx:\tExecute\n"
"\t\ts:\tSet User ID\n"
"\t\tt:\t\"Sticky\" Text\n"
"\n"
"\tModes may be concatenated, as in \"u=rwx,g=rx,o=rx,-t,-s\n"
"\n"
"\t-R:\tRecursively change the mode of all files and directories\n"
"\t\tunder the argument directory.";
int
parse_mode(
const char * s
,mode_t * or
,mode_t * and
,int * group_execute)
static mode_t mode=7777;
static const char chmod_usage[] = "[-R] MODE[,MODE]... FILE...\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"
"\t-R\tchange files and directories recursively.\n";
static int fileAction(const char *fileName)
{
struct stat statBuf;
if ((stat(fileName, &statBuf) < 0) ||
(chmod(fileName, mode)) < 0) {
perror(fileName);
return( FALSE);
}
return( TRUE);
}
/* [ugoa]{+|-|=}[rwxstl] */
int parse_mode( const char* s, mode_t* or, mode_t* and, int* group_execute)
{
/* [ugoa]{+|-|=}[rwxstl] */
mode_t mode = 0;
mode_t groups = S_ISVTX;
char type;
@@ -45,7 +58,7 @@ parse_mode(
for ( ; ; ) {
switch ( c = *s++ ) {
case '\0':
return -1;
return (FALSE);
case 'u':
groups |= S_ISUID|S_IRWXU;
continue;
@@ -69,10 +82,10 @@ parse_mode(
if ( c >= '0' && c <= '7' && mode == 0 && groups == S_ISVTX ) {
*and = 0;
*or = strtol(--s, 0, 010);
return 0;
return (TRUE);
}
else
return -1;
return (FALSE);
}
break;
}
@@ -93,7 +106,7 @@ parse_mode(
case 's':
if ( group_execute != 0 && (groups & S_IRWXG) ) {
if ( *group_execute < 0 )
return -1;
return (FALSE);
if ( type != '-' ) {
mode |= S_IXGRP;
*group_execute = 1;
@@ -103,7 +116,7 @@ parse_mode(
continue;
case 'l':
if ( *group_execute > 0 )
return -1;
return (FALSE);
if ( type != '-' ) {
*and &= ~S_IXGRP;
*group_execute = -1;
@@ -115,7 +128,7 @@ parse_mode(
mode |= S_ISVTX;
continue;
default:
return -1;
return (FALSE);
}
break;
}
@@ -132,32 +145,54 @@ parse_mode(
break;
}
} while ( c == ',' );
return 0;
return (TRUE);
}
extern int
chmod_main(struct FileInfo * i, int argc, char * * argv)
int chmod_main(int argc, char **argv)
{
i->andWithMode = S_ISVTX|S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
i->orWithMode = 0;
int recursiveFlag=FALSE;
mode_t andWithMode = S_ISVTX|S_ISUID|S_ISGID|S_IRWXU|S_IRWXG|S_IRWXO;
mode_t orWithMode = 0;
char *invocationName=*argv;
while ( argc >= 3 ) {
if ( parse_mode(argv[1], &i->orWithMode, &i->andWithMode, 0)
== 0 ) {
argc--;
argv++;
}
else if ( strcmp(argv[1], "-R") == 0 ) {
i->recursive = 1;
argc--;
argv++;
}
else
break;
if (argc < 3) {
fprintf(stderr, "Usage: %s %s", invocationName, chmod_usage);
exit( FALSE);
}
argc--;
argv++;
/* Parse options */
while (**argv == '-') {
while (*++(*argv)) switch (**argv) {
case 'R':
recursiveFlag = TRUE;
break;
default:
fprintf(stderr, "Unknown option: %c\n", **argv);
exit( FALSE);
}
argc--;
argv++;
}
/* Find the selected group */
if ( parse_mode(*argv, &orWithMode, &andWithMode, 0) == FALSE ) {
fprintf(stderr, "%s: Unknown mode: %s\n", invocationName, *argv);
exit( FALSE);
}
mode &= andWithMode;
mode |= orWithMode;
i->changeMode = 1;
i->complainInPostProcess = 1;
return monadic_main(i, argc, argv);
/* Ok, ready to do the deed now */
if (argc <= 1) {
fprintf(stderr, "%s: too few arguments", invocationName);
exit( FALSE);
}
while (argc-- > 1) {
argv++;
recursiveAction( *argv, recursiveFlag, TRUE, fileAction, fileAction);
}
exit(TRUE);
}