common/path.c: fixed is_abspath.

src/common/path.c

@@ -82,12 +82,22 @@ static char* cpy_path(char *buf, const char *path) {
 }
 
 int is_abspath(const char *path) {
-	
+
-	if (*path != '/')
+	if (path == NULL || *path != '/')
 		return 0;
-	
+
-	return strstr(path, "/./")  == NULL && 
+    for(; *path; path++) {
-		   strstr(path, "/../") == NULL;
+
+        if (*path == '/' && *(path+1) == '.') {
+            path += 2;
+            if (*path == '.')
+                path++;
+            if (*path == '/' || *path == '\0')
+                return 0;
+        }
+    }
+
+	return 1;
 }
 
 size_t pathlen(const char *path) {

test/t_path.c

@@ -37,6 +37,20 @@ void test_pathlen() {
     assert(pathlen("dir") == 3);
 }
 
+void test_isabspath() {
+
+    assert(is_abspath("file") == 0);
+    assert(is_abspath("./file") == 0);
+    assert(is_abspath(".file") == 0);
+    assert(is_abspath("..file") == 0);
+    assert(is_abspath("/../relpath") == 0);
+    assert(is_abspath("/path/to/file") == 1);
+    assert(is_abspath("/ab/xy/.file") == 1);
+    assert(is_abspath("/ab/xy/..file") == 1);
+    assert(is_abspath("/ab/.xy/file") == 1);
+    assert(is_abspath("/ab/..xy/file") ==1);
+}
+
 void test_basename() {
 
     int i;
@@ -83,6 +97,7 @@ void test_dirname() {
 
 int main(int argc, char *argv[]) {
 
+    test_isabspath();
     test_fmt_path();
     test_pathlen();
     test_basename();