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_ap(const char *x, va_list ap) {
91 unsigned n = 0, i = 0;
99 while (va_arg(aq, const char*))
104 if (!(a = new(char*, n+1)))
108 if (!(a[i] = strdup(x))) {
115 while ((s = va_arg(ap, const char*))) {
116 if (!(a[i] = strdup(s)))
138 char **strv_new(const char *x, ...) {
143 r = strv_new_ap(x, ap);
149 char **strv_merge(char **a, char **b) {
158 if (!(r = new(char*, strv_length(a)+strv_length(b)+1)))
161 for (k = r; *a; k++, a++)
162 if (!(*k = strdup(*a)))
165 if (!(*k = strdup(*b)))
172 for (k--; k >= r; k--)
180 char **strv_merge_concat(char **a, char **b, const char *suffix) {
183 /* Like strv_merge(), but appends suffix to all strings in b, before adding */
188 if (!(r = new(char*, strv_length(a)+strv_length(b)+1)))
191 for (k = r; *a; k++, a++)
192 if (!(*k = strdup(*a)))
195 if (!(*k = strappend(*b, suffix)))
202 for (k--; k >= r; k--)
211 char **strv_split(const char *s, const char *separator) {
221 FOREACH_WORD_SEPARATOR(w, l, s, separator, state)
224 if (!(r = new(char*, n+1)))
228 FOREACH_WORD_SEPARATOR(w, l, s, separator, state)
229 if (!(r[i++] = strndup(w, l))) {
238 char **strv_split_quoted(const char *s) {
248 FOREACH_WORD_QUOTED(w, l, s, state)
251 if (!(r = new(char*, n+1)))
255 FOREACH_WORD_QUOTED(w, l, s, state)
256 if (!(r[i++] = strndup(w, l))) {
265 char *strv_join(char **l, const char *separator) {
273 k = strlen(separator);
282 if (!(r = new(char, n+1)))
288 e = stpcpy(e, separator);
298 char **strv_append(char **l, const char *s) {
302 return strv_new(s, NULL);
307 if (!(r = new(char*, strv_length(l)+2)))
310 for (k = r; *l; k++, l++)
311 if (!(*k = strdup(*l)))
314 if (!(*(k++) = strdup(s)))
321 for (k--; k >= r; k--)
329 char **strv_uniq(char **l) {
332 /* Drops duplicate entries. The first identical string will be
333 * kept, the others dropped */
336 strv_remove(i+1, *i);
341 char **strv_remove(char **l, const char *s) {
347 /* Drops every occurence of s in the string list */
349 for (f = t = l; *f; f++) {
363 static int env_append(char **r, char ***k, char **a) {
368 /* Add the entries of a to *k unless they already exist in *r
369 * in which case they are overriden instead. This assumes
370 * there is enough space in the r */
374 size_t n = strcspn(*a, "=") + 1;
376 for (j = r; j < *k; j++)
377 if (strncmp(*j, *a, n) == 0)
385 if (!(*j = strdup(*a)))
392 char **strv_env_merge(char **x, ...) {
397 /* Merges an arbitrary number of environment sets */
403 while ((l = va_arg(ap, char**)))
409 if (!(r = new(char*, n+1)))
415 if (env_append(r, &k, x) < 0)
419 while ((l = va_arg(ap, char**)))
420 if (env_append(r, &k, l) < 0)
430 for (k--; k >= r; k--)
438 static bool env_match(const char *t, const char *pattern) {
442 /* pattern a matches string a
447 * a= does not match a
448 * a=b does not match a=
449 * a=b does not match a
450 * a=b does not match a=c */
452 if (streq(t, pattern))
455 if (!strchr(pattern, '=')) {
456 size_t l = strlen(pattern);
458 return strncmp(t, pattern, l) == 0 && t[l] == '=';
464 char **strv_env_delete(char **x, ...) {
466 char **l, **k, **r, **j;
469 /* Deletes every entry fromx that is mentioned in the other
474 if (!(r = new(char*, n+1)))
480 while ((l = va_arg(ap, char**)))
482 if (env_match(*k, *j))
487 if (!(r[i++] = strdup(*k))) {