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-rw-r--r--src/basic/fileio.c40
1 files changed, 32 insertions, 8 deletions
diff --git a/src/basic/fileio.c b/src/basic/fileio.c
index 4a9105f421..13a85e1158 100644
--- a/src/basic/fileio.c
+++ b/src/basic/fileio.c
@@ -775,15 +775,19 @@ int executable_is_script(const char *path, char **interpreter) {
/**
* Retrieve one field from a file like /proc/self/status. pattern
- * should start with '\n' and end with a ':'. Whitespace and zeros
- * after the ':' will be skipped. field must be freed afterwards.
+ * should not include whitespace or the delimiter (':'). pattern matches only
+ * the beginning of a line. Whitespace before ':' is skipped. Whitespace and
+ * zeros after the ':' will be skipped. field must be freed afterwards.
+ * terminator specifies the terminating characters of the field value (not
+ * included in the value).
*/
-int get_status_field(const char *filename, const char *pattern, char **field) {
+int get_proc_field(const char *filename, const char *pattern, const char *terminator, char **field) {
_cleanup_free_ char *status = NULL;
char *t, *f;
size_t len;
int r;
+ assert(terminator);
assert(filename);
assert(pattern);
assert(field);
@@ -792,11 +796,31 @@ int get_status_field(const char *filename, const char *pattern, char **field) {
if (r < 0)
return r;
- t = strstr(status, pattern);
- if (!t)
- return -ENOENT;
+ t = status;
+
+ do {
+ bool pattern_ok;
+
+ do {
+ t = strstr(t, pattern);
+ if (!t)
+ return -ENOENT;
+
+ /* Check that pattern occurs in beginning of line. */
+ pattern_ok = (t == status || t[-1] == '\n');
+
+ t += strlen(pattern);
+
+ } while (!pattern_ok);
+
+ t += strspn(t, " \t");
+ if (!*t)
+ return -ENOENT;
+
+ } while (*t != ':');
+
+ t++;
- t += strlen(pattern);
if (*t) {
t += strspn(t, " \t");
@@ -812,7 +836,7 @@ int get_status_field(const char *filename, const char *pattern, char **field) {
t --;
}
- len = strcspn(t, WHITESPACE);
+ len = strcspn(t, terminator);
f = strndup(t, len);
if (!f)