1 /* $NetBSD: libdm-string.c,v 1.1.1.2 2009/12/02 00:26:08 haad Exp $ */
4 * Copyright (C) 2006-2007 Red Hat, Inc. All rights reserved.
6 * This file is part of the device-mapper userspace tools.
8 * This copyrighted material is made available to anyone wishing to use,
9 * modify, copy, or redistribute it subject to the terms and conditions
10 * of the GNU Lesser General Public License v.2.1.
12 * You should have received a copy of the GNU Lesser General Public License
13 * along with this program; if not, write to the Free Software Foundation,
14 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 #include "libdevmapper.h"
23 * consume characters while they match the predicate function.
25 static char *_consume(char *buffer, int (*fn) (int))
27 while (*buffer && fn(*buffer))
33 static int _isword(int c)
39 * Split buffer into NULL-separated words in argv.
40 * Returns number of words.
42 int dm_split_words(char *buffer, unsigned max,
43 unsigned ignore_comments __attribute((unused)),
48 for (arg = 0; arg < max; arg++) {
49 buffer = _consume(buffer, isspace);
54 buffer = _consume(buffer, _isword);
66 * Remove hyphen quoting from a component of a name.
67 * NULL-terminates the component and returns start of next component.
69 static char *_unquote(char *component)
95 int dm_split_lvm_name(struct dm_pool *mem, const char *dmname,
96 char **vgname, char **lvname, char **layer)
98 if (mem && !(*vgname = dm_pool_strdup(mem, dmname)))
101 _unquote(*layer = _unquote(*lvname = _unquote(*vgname)));
107 * On error, up to glibc 2.0.6, snprintf returned -1 if buffer was too small;
108 * From glibc 2.1 it returns number of chars (excl. trailing null) that would
109 * have been written had there been room.
111 * dm_snprintf reverts to the old behaviour.
113 int dm_snprintf(char *buf, size_t bufsize, const char *format, ...)
118 va_start(ap, format);
119 n = vsnprintf(buf, bufsize, format, ap);
122 if (n < 0 || ((unsigned) n + 1 > bufsize))
128 char *dm_basename(const char *path)
130 char *p = strrchr(path, '/');
132 return p ? p + 1 : (char *) path;
135 int dm_asprintf(char **result, const char *format, ...)
137 int n, ok = 0, size = 32;
139 char *buf = dm_malloc(size);
147 va_start(ap, format);
148 n = vsnprintf(buf, size, format, ap);
149 if (0 <= n && n < size)
154 buf = dm_malloc(size);
161 *result = dm_strdup(buf);