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Major coreutils update.

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This commit is contained in:
Manuel Novoa III
2003-03-19 09:13:01 +00:00
parent e01f9662a5
commit cad5364599
295 changed files with 6944 additions and 5570 deletions
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219
libbb/parse_mode.c
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@@ -1,134 +1,177 @@
/* vi: set sw=4 ts=4: */
/*
* Utility routines.
* parse_mode implementation for busybox
*
* Copyright (C) many different people. If you wrote this, please
* acknowledge your work.
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.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
* 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
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <stdio.h>
/* http://www.opengroup.org/onlinepubs/007904975/utilities/chmod.html */
#include <stdlib.h>
#include <assert.h>
#include <sys/stat.h>
#include "libbb.h"
#define FILEMODEBITS (S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO)
/* This function parses the sort of string you might pass
* to chmod (i.e., [ugoa]{+|-|=}[rwxst] ) and returns the
* correct mode described by the string. */
extern int parse_mode(const char *s, mode_t * theMode)
extern int bb_parse_mode(const char *s, mode_t *current_mode)
{
static const mode_t group_set[] = {
static const mode_t who_mask[] = {
S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO, /* a */
S_ISUID | S_IRWXU, /* u */
S_ISGID | S_IRWXG, /* g */
S_IRWXO, /* o */
S_ISUID | S_ISGID | S_ISVTX | S_IRWXU | S_IRWXG | S_IRWXO /* a */
S_IRWXO /* o */
};
static const mode_t mode_set[] = {
static const mode_t perm_mask[] = {
S_IRUSR | S_IRGRP | S_IROTH, /* r */
S_IWUSR | S_IWGRP | S_IWOTH, /* w */
S_IXUSR | S_IXGRP | S_IXOTH, /* x */
S_IXUSR | S_IXGRP | S_IXOTH, /* X -- special -- see below */
S_ISUID | S_ISGID, /* s */
S_ISVTX /* t */
};
static const char group_chars[] = "ugoa";
static const char mode_chars[] = "rwxst";
static const char who_chars[] = "augo";
static const char perm_chars[] = "rwxXst";
const char *p;
mode_t andMode =
S_ISVTX | S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
mode_t orMode = 0;
mode_t mode;
mode_t groups;
char type;
char c;
mode_t wholist;
mode_t permlist;
mode_t mask;
mode_t new_mode;
char op;
if (s==NULL) {
return (FALSE);
assert(s);
if (((unsigned int)(*s - '0')) < 8) {
unsigned long tmp;
char *e;
tmp = strtol(s, &e, 8);
if (*e || (tmp > 0xffffU)) { /* Check range and trailing chars. */
return 0;
}
*current_mode = tmp;
return 1;
}
do {
mode = 0;
groups = 0;
NEXT_GROUP:
if ((c = *s++) == '\0') {
return -1;
mask = umask(0);
umask(mask);
new_mode = *current_mode;
/* Note: We allow empty clauses, and hence empty modes.
* We treat an empty mode as no change to perms. */
while (*s) { /* Process clauses. */
if (*s == ',') { /* We allow empty clauses. */
++s;
continue;
}
for (p=group_chars ; *p ; p++) {
if (*p == c) {
groups |= group_set[(int)(p-group_chars)];
goto NEXT_GROUP;
}
}
switch (c) {
case '=':
case '+':
case '-':
type = c;
if (groups == 0) { /* The default is "all" */
groups |= S_ISUID | S_ISGID | S_ISVTX
| S_IRWXU | S_IRWXG | S_IRWXO;
/* Get a wholist. */
wholist = 0;
WHO_LIST:
p = who_chars;
do {
if (*p == *s) {
wholist |= who_mask[(int)(p-who_chars)];
if (!*++s) {
return 0;
}
break;
default:
if ((c < '0') || (c > '7') || (mode | groups)) {
return (FALSE);
goto WHO_LIST;
}
} while (*++p);
do { /* Process action list. */
if ((*s != '+') && (*s != '-')) {
if (*s != '=') {
return 0;
}
/* Since op is '=', clear all bits corresponding to the
* wholist, of all file bits if wholist is empty. */
permlist = ~FILEMODEBITS;
if (wholist) {
permlist = ~wholist;
}
new_mode &= permlist;
}
op = *s++;
/* Check for permcopy. */
p = who_chars + 1; /* Skip 'a' entry. */
do {
if (*p == *s) {
int i = 0;
permlist = who_mask[(int)(p-who_chars)]
& (S_IRWXU | S_IRWXG | S_IRWXO)
& new_mode;
do {
if (permlist & perm_mask[i]) {
permlist |= perm_mask[i];
}
} while (++i < 3);
++s;
goto GOT_ACTION;
}
} while (*++p);
/* It was not a permcopy, so get a permlist. */
permlist = 0;
PERM_LIST:
p = perm_chars;
do {
if (*p == *s) {
if ((*p != 'X')
|| (new_mode & (S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH))
) {
permlist |= perm_mask[(int)(p-perm_chars)];
}
if (!*++s) {
break;
}
goto PERM_LIST;
}
} while (*++p);
GOT_ACTION:
if (permlist) { /* The permlist was nonempty. */
mode_t tmp = ~mask;
if (wholist) {
tmp = wholist;
}
permlist &= tmp;
if (op == '-') {
new_mode &= ~permlist;
} else {
*theMode = strtol(--s, NULL, 8);
return (TRUE);
}
}
NEXT_MODE:
if (((c = *s++) != '\0') && (c != ',')) {
for (p=mode_chars ; *p ; p++) {
if (*p == c) {
mode |= mode_set[(int)(p-mode_chars)];
goto NEXT_MODE;
new_mode |= permlist;
}
}
break; /* We're done so break out of loop.*/
}
switch (type) {
case '=':
andMode &= ~(groups); /* Now fall through. */
case '+':
orMode |= mode & groups;
break;
case '-':
andMode &= ~(mode & groups);
orMode &= ~(mode & groups);
break;
}
} while (c == ',');
} while (*s && (*s != ','));
}
*theMode &= andMode;
*theMode |= orMode;
*current_mode = new_mode;
return TRUE;
return 1;
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/