***/
#include <limits.h>
-#include <sys/param.h>
#include <unistd.h>
#include "strv.h"
#include "utf8.h"
#include "util.h"
#include "env-util.h"
+#include "def.h"
#define VALID_CHARS_ENV_NAME \
- "0123456789" \
- "abcdefghijklmnopqrstuvwxyz" \
- "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
+ DIGITS LETTERS \
"_"
#ifndef ARG_MAX
if (!utf8_is_valid(e))
return false;
- if (string_has_cc(e))
+ /* bash allows tabs in environment variables, and so should
+ * we */
+ if (string_has_cc(e, "\t"))
return false;
/* POSIX says the overall size of the environment block cannot
/* POSIX says the overall size of the environment block cannot
* be > ARG_MAX, hence the individual variable assignments
- * cannot be either, but let's room for one trailing NUL
+ * cannot be either, but let's leave room for one trailing NUL
* byte. */
if (strlen(e) > ARG_MAX - 1)
return false;
/* Check if there are duplicate assginments */
k = strcspn(*p, "=");
STRV_FOREACH(q, p + 1)
- if (strncmp(*p, *q, k) == 0 && (*q)[k] == '=')
+ if (strneq(*p, *q, k) && (*q)[k] == '=')
+ return false;
+ }
+
+ return true;
+}
+
+bool strv_env_name_or_assignment_is_valid(char **l) {
+ char **p, **q;
+
+ STRV_FOREACH(p, l) {
+ if (!env_assignment_is_valid(*p) && !env_name_is_valid(*p))
+ return false;
+
+ STRV_FOREACH(q, p + 1)
+ if (streq(*p, *q))
return false;
}
n++;
for (j = r; j < *k; j++)
- if (strncmp(*j, *a, n) == 0)
+ if (strneq(*j, *a, n))
break;
if (j >= *k)
return NULL;
}
-static bool env_match(const char *t, const char *pattern) {
+_pure_ static bool env_match(const char *t, const char *pattern) {
assert(t);
assert(pattern);
if (!strchr(pattern, '=')) {
size_t l = strlen(pattern);
- return strncmp(t, pattern, l) == 0 && t[l] == '=';
+ return strneq(t, pattern, l) && t[l] == '=';
}
return false;
assert(p);
/* Drops every occurrence of the env var setting p in the
- * string list. edits in-place. */
+ * string list. Edits in-place. */
for (f = t = l; *f; f++) {
return l;
}
+char **strv_env_unset_many(char **l, ...) {
+
+ char **f, **t;
+
+ if (!l)
+ return NULL;
+
+ /* Like strv_env_unset() but applies many at once. Edits in-place. */
+
+ for (f = t = l; *f; f++) {
+ bool found = false;
+ const char *p;
+ va_list ap;
+
+ va_start(ap, l);
+
+ while ((p = va_arg(ap, const char*))) {
+ if (env_match(*f, p)) {
+ found = true;
+ break;
+ }
+ }
+
+ va_end(ap);
+
+ if (found) {
+ free(*f);
+ continue;
+ }
+
+ *(t++) = *f;
+ }
+
+ *t = NULL;
+ return l;
+}
+
char **strv_env_set(char **x, const char *p) {
char **k, **r;
return NULL;
STRV_FOREACH(i, l)
- if (strncmp(*i, name, k) == 0 &&
+ if (strneq(*i, name, k) &&
(*i)[k] == '=')
return *i + k + 1;
return strv_env_get_n(l, name, strlen(name));
}
-char **strv_env_clean(char **e) {
+char **strv_env_clean_with_callback(char **e, void (*invalid_callback)(const char *p, void *userdata), void *userdata) {
char **p, **q;
int k = 0;
bool duplicate = false;
if (!env_assignment_is_valid(*p)) {
+ if (invalid_callback)
+ invalid_callback(*p, userdata);
free(*p);
continue;
}
n = strcspn(*p, "=");
STRV_FOREACH(q, p + 1)
- if (strncmp(*p, *q, n) == 0 && (*q)[n] == '=') {
+ if (strneq(*p, *q, n) && (*q)[n] == '=') {
duplicate = true;
break;
}
e[k++] = *p;
}
- e[k] = NULL;
+ if (e)
+ e[k] = NULL;
+
return e;
}
+
+char *replace_env(const char *format, char **env) {
+ enum {
+ WORD,
+ CURLY,
+ VARIABLE
+ } state = WORD;
+
+ const char *e, *word = format;
+ char *r = NULL, *k;
+
+ assert(format);
+
+ for (e = format; *e; e ++) {
+
+ switch (state) {
+
+ case WORD:
+ if (*e == '$')
+ state = CURLY;
+ break;
+
+ case CURLY:
+ if (*e == '{') {
+ k = strnappend(r, word, e-word-1);
+ if (!k)
+ goto fail;
+
+ free(r);
+ r = k;
+
+ word = e-1;
+ state = VARIABLE;
+
+ } else if (*e == '$') {
+ k = strnappend(r, word, e-word);
+ if (!k)
+ goto fail;
+
+ free(r);
+ r = k;
+
+ word = e+1;
+ state = WORD;
+ } else
+ state = WORD;
+ break;
+
+ case VARIABLE:
+ if (*e == '}') {
+ const char *t;
+
+ t = strempty(strv_env_get_n(env, word+2, e-word-2));
+
+ k = strappend(r, t);
+ if (!k)
+ goto fail;
+
+ free(r);
+ r = k;
+
+ word = e+1;
+ state = WORD;
+ }
+ break;
+ }
+ }
+
+ k = strnappend(r, word, e-word);
+ if (!k)
+ goto fail;
+
+ free(r);
+ return k;
+
+fail:
+ free(r);
+ return NULL;
+}
+
+char **replace_env_argv(char **argv, char **env) {
+ char **ret, **i;
+ unsigned k = 0, l = 0;
+
+ l = strv_length(argv);
+
+ ret = new(char*, l+1);
+ if (!ret)
+ return NULL;
+
+ STRV_FOREACH(i, argv) {
+
+ /* If $FOO appears as single word, replace it by the split up variable */
+ if ((*i)[0] == '$' && (*i)[1] != '{') {
+ char *e;
+ char **w, **m = NULL;
+ unsigned q;
+
+ e = strv_env_get(env, *i+1);
+ if (e) {
+ int r;
+
+ r = strv_split_quoted(&m, e, UNQUOTE_RELAX);
+ if (r < 0) {
+ ret[k] = NULL;
+ strv_free(ret);
+ return NULL;
+ }
+ } else
+ m = NULL;
+
+ q = strv_length(m);
+ l = l + q - 1;
+
+ w = realloc(ret, sizeof(char*) * (l+1));
+ if (!w) {
+ ret[k] = NULL;
+ strv_free(ret);
+ strv_free(m);
+ return NULL;
+ }
+
+ ret = w;
+ if (m) {
+ memcpy(ret + k, m, q * sizeof(char*));
+ free(m);
+ }
+
+ k += q;
+ continue;
+ }
+
+ /* If ${FOO} appears as part of a word, replace it by the variable as-is */
+ ret[k] = replace_env(*i, env);
+ if (!ret[k]) {
+ strv_free(ret);
+ return NULL;
+ }
+ k++;
+ }
+
+ ret[k] = NULL;
+ return ret;
+}
~ianmdlvl / elogind.git / blobdiff