mirror of
git://sourceware.org/git/lvm2.git
synced 2024-12-22 17:35:59 +03:00
124 lines
2.4 KiB
C
124 lines
2.4 KiB
C
/*
|
|
* Copyright (C) 2006 Red Hat, Inc. All rights reserved.
|
|
*
|
|
* This file is part of the device-mapper userspace tools.
|
|
*
|
|
* This copyrighted material is made available to anyone wishing to use,
|
|
* modify, copy, or redistribute it subject to the terms and conditions
|
|
* of the GNU General Public License v.2.
|
|
*
|
|
* 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 "lib.h"
|
|
#include "libdevmapper.h"
|
|
|
|
#include <ctype.h>
|
|
|
|
/*
|
|
* consume characters while they match the predicate function.
|
|
*/
|
|
static char *_consume(char *buffer, int (*fn) (int))
|
|
{
|
|
while (*buffer && fn(*buffer))
|
|
buffer++;
|
|
|
|
return buffer;
|
|
}
|
|
|
|
static int _isword(int c)
|
|
{
|
|
return !isspace(c);
|
|
}
|
|
|
|
/*
|
|
* Split buffer into NULL-separated words in argv.
|
|
* Returns number of words.
|
|
*/
|
|
int dm_split_words(char *buffer, unsigned max, unsigned ignore_comments,
|
|
char **argv)
|
|
{
|
|
unsigned arg;
|
|
|
|
for (arg = 0; arg < max; arg++) {
|
|
buffer = _consume(buffer, isspace);
|
|
if (!*buffer)
|
|
break;
|
|
|
|
argv[arg] = buffer;
|
|
buffer = _consume(buffer, _isword);
|
|
|
|
if (*buffer) {
|
|
*buffer = '\0';
|
|
buffer++;
|
|
}
|
|
}
|
|
|
|
return arg;
|
|
}
|
|
|
|
/*
|
|
* Remove hyphen quoting from a component of a name.
|
|
* NULL-terminates the component and returns start of next component.
|
|
*/
|
|
static char *_unquote(char *component)
|
|
{
|
|
char *c = component;
|
|
char *o = c;
|
|
char *r;
|
|
|
|
while (*c) {
|
|
if (*(c + 1)) {
|
|
if (*c == '-') {
|
|
if (*(c + 1) == '-')
|
|
c++;
|
|
else
|
|
break;
|
|
}
|
|
}
|
|
*o = *c;
|
|
o++;
|
|
c++;
|
|
}
|
|
|
|
r = (*c) ? c + 1 : c;
|
|
*o = '\0';
|
|
|
|
return r;
|
|
}
|
|
|
|
int dm_split_lvm_name(struct dm_pool *mem, const char *dmname,
|
|
char **vgname, char **lvname, char **layer)
|
|
{
|
|
if (!(*vgname = dm_pool_strdup(mem, dmname)))
|
|
return 0;
|
|
|
|
_unquote(*layer = _unquote(*lvname = _unquote(*vgname)));
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* On error, up to glibc 2.0.6, snprintf returned -1 if buffer was too small;
|
|
* From glibc 2.1 it returns number of chars (excl. trailing null) that would
|
|
* have been written had there been room.
|
|
*
|
|
* dm_snprintf reverts to the old behaviour.
|
|
*/
|
|
int dm_snprintf(char *buf, size_t bufsize, const char *format, ...)
|
|
{
|
|
int n;
|
|
va_list ap;
|
|
|
|
va_start(ap, format);
|
|
n = vsnprintf(buf, bufsize, format, ap);
|
|
va_end(ap);
|
|
|
|
if (n < 0 || (n > bufsize - 1))
|
|
return -1;
|
|
|
|
return n;
|
|
}
|