1 files changed, 46 insertions, 0 deletions
diff --git a/src/system.c b/src/system.c
index 2f95661..ccb7ccd 100644
--- a/src/system.c
+++ b/src/system.c
@@ -122,3 +122,49 @@ int ftag_execvp(char *const *cmd, int can_exit)
 	}
 	return status;
 }
+
+char *edit(const char *initial_content)
+{
+	char tmp_file[32];
+	int tmp_fd;
+	int rc;
+	char *env_editor;
+	char editor_cmd[512];
+	char *cmd[] = {
+		"sh",
+		"-c",
+		editor_cmd,
+		NULL
+	};
+	char *new_content;
+	strcpy(tmp_file, "/tmp/ftag-XXXXXX");
+	tmp_fd = mkstemp(tmp_file);
+	sys_check(tmp_fd != -1, "mkstemp");
+	rc = write(tmp_fd, initial_content, strlen(initial_content));
+	sys_check(rc != -1, "write");
+	env_editor = getenv("EDITOR");
+	if (env_editor)
+		strbuild(editor_cmd, "%s %s", env_editor, tmp_file);
+	else
+		strbuild(editor_cmd, "%s %s", "nano", tmp_file);
+	ftag_execvp(cmd, 1);
+	new_content = file_to_string(tmp_fd);
+	close(tmp_fd);
+	return new_content;
+}
+
+char *file_to_string(int fd)
+{
+	struct stat st;
+	char *content;
+	int rc;
+	rc = lseek(fd, 0L, SEEK_SET);
+	sys_check(rc != -1, "lseek");
+	rc = fstat(fd, &st);
+	sys_check(rc != -1, "stat");
+	content = malloc(st.st_size + 1);
+	rc = read(fd, content, st.st_size);
+	sys_check(rc != -1, "read");
+	content[st.st_size] = '\0';
+	return content;
+}