1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
31 char *strv_find(char **l, const char *name) {
44 void strv_free(char **l) {
56 char **strv_copy(char **l) {
59 if (!(r = new(char*, strv_length(l)+1)))
62 for (k = r; *l; k++, l++)
63 if (!(*k = strdup(*l)))
70 for (k--, l--; k >= r; k--, l--)
76 unsigned strv_length(char **l) {
88 char **strv_new(const char *x, ...) {
91 unsigned n = 0, i = 0;
99 while (va_arg(ap, const char*))
105 if (!(a = new(char*, n+1)))
109 if (!(a[i] = strdup(x))) {
118 while ((s = va_arg(ap, const char*))) {
119 if (!(a[i] = strdup(s)))
141 char **strv_merge(char **a, char **b) {
150 if (!(r = new(char*, strv_length(a)+strv_length(b)+1)))
153 for (k = r; *a; k++, a++)
154 if (!(*k = strdup(*a)))
157 if (!(*k = strdup(*b)))
164 for (k--; k >= r; k--)
172 char **strv_merge_concat(char **a, char **b, const char *suffix) {
175 /* Like strv_merge(), but appends suffix to all strings in b, before adding */
180 if (!(r = new(char*, strv_length(a)+strv_length(b)+1)))
183 for (k = r; *a; k++, a++)
184 if (!(*k = strdup(*a)))
187 if (!(*k = strappend(*b, suffix)))
194 for (k--; k >= r; k--)
203 char **strv_split(const char *s, const char *separator) {
213 FOREACH_WORD_SEPARATOR(w, l, s, separator, state)
216 if (!(r = new(char*, n+1)))
220 FOREACH_WORD_SEPARATOR(w, l, s, separator, state)
221 if (!(r[i++] = strndup(w, l))) {
230 char **strv_split_quoted(const char *s) {
240 FOREACH_WORD_QUOTED(w, l, s, state)
243 if (!(r = new(char*, n+1)))
247 FOREACH_WORD_QUOTED(w, l, s, state)
248 if (!(r[i++] = strndup(w, l))) {
257 char *strv_join(char **l, const char *separator) {
265 k = strlen(separator);
274 if (!(r = new(char, n+1)))
280 e = stpcpy(e, separator);
290 char **strv_append(char **l, const char *s) {
294 return strv_new(s, NULL);
299 if (!(r = new(char*, strv_length(l)+2)))
302 for (k = r; *l; k++, l++)
303 if (!(*k = strdup(*l)))
306 if (!(*(k++) = strdup(s)))
313 for (k--; k >= r; k--)
321 char **strv_uniq(char **l) {
324 /* Drops duplicate entries. The first identical string will be
325 * kept, the others dropped */
328 strv_remove(i+1, *i);
333 char **strv_remove(char **l, const char *s) {
339 /* Drops every occurence of s in the string list */
341 for (f = t = l; *f; f++) {
355 static int env_append(char **r, char ***k, char **a) {
360 /* Add the entries of a to *k unless they already exist in *r
361 * in which case they are overriden instead. This assumes
362 * there is enough space in the r */
366 size_t n = strcspn(*a, "=") + 1;
368 for (j = r; j < *k; j++)
369 if (strncmp(*j, *a, n) == 0)
377 if (!(*j = strdup(*a)))
384 char **strv_env_merge(char **x, ...) {
389 /* Merges an arbitrary number of environment sets */
395 while ((l = va_arg(ap, char**)))
401 if (!(r = new(char*, n+1)))
407 if (env_append(r, &k, x) < 0)
411 while ((l = va_arg(ap, char**)))
412 if (env_append(r, &k, l) < 0)
422 for (k--; k >= r; k--)