journalctl: use _COMM= match for scripts

[elogind.git] / src / shared / fileio.c

diff --git a/src/shared/fileio.c b/src/shared/fileio.c
index 48dd44239fa6dc9930072b808eb2e140d3a7ffb9..2b1dab805347c572ed386f52691dea203aa5a840 100644 (file)
--- a/src/shared/fileio.c
+++ b/src/shared/fileio.c
@@ -24,16 +24,7 @@
 #include "util.h"
 #include "strv.h"
 
-int write_string_file(const char *fn, const char *line) {
-        _cleanup_fclose_ FILE *f = NULL;
-
-        assert(fn);
-        assert(line);
-
-        f = fopen(fn, "we");
-        if (!f)
-                return -errno;
-
+int write_string_to_file(FILE *f, const char *line) {
         errno = 0;
         fputs(line, f);
         if (!endswith(line, "\n"))
@@ -47,6 +38,19 @@ int write_string_file(const char *fn, const char *line) {
         return 0;
 }
 
+int write_string_file(const char *fn, const char *line) {
+        _cleanup_fclose_ FILE *f = NULL;
+
+        assert(fn);
+        assert(line);
+
+        f = fopen(fn, "we");
+        if (!f)
+                return -errno;
+
+        return write_string_to_file(f, line);
+}
+
 int write_string_file_atomic(const char *fn, const char *line) {
         _cleanup_fclose_ FILE *f = NULL;
         _cleanup_free_ char *p = NULL;
@@ -589,3 +593,32 @@ int write_env_file(const char *fname, char **l) {
 
         return r;
 }
+
+int executable_is_script(const char *path, char **interpreter) {
+        int r;
+        char _cleanup_free_ *line = NULL;
+        int len;
+        char *ans;
+
+        assert(path);
+
+        r = read_one_line_file(path, &line);
+        if (r < 0)
+                return r;
+
+        if (!startswith(line, "#!"))
+                return 0;
+
+        ans = strstrip(line + 2);
+        len = strcspn(ans, " \t");
+
+        if (len == 0)
+                return 0;
+
+        ans = strndup(ans, len);
+        if (!ans)
+                return -ENOMEM;
+
+        *interpreter = ans;
+        return 1;
+}