1 files changed, 41 insertions, 0 deletions
diff --git a/yarns/symtime.c b/yarns/symtime.c
new file mode 100644
index 0000000..73471ef
--- /dev/null
+++ b/yarns/symtime.c
@@ -0,0 +1,41 @@
+#define _BSD_SOURCE
+#include <stdlib.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <err.h>
+
+/*
+ * Busybox touch currently doesn't do any special symlink handling; this
+ * program is used to change the modification times of symbolic links.
+ */
+
+int set_link_mtime(char *filepath, int mtime)
+{
+	struct timeval tv[2] = { {.tv_sec = mtime}, {.tv_sec = mtime} };
+
+	if (lutimes(filepath, tv) == -1) {
+		err(EXIT_FAILURE, NULL);
+	}
+
+	return EXIT_SUCCESS;
+}
+
+int main(int argc, char *argv[])
+{
+	char *endptr;
+	long mtime;
+
+	if (argc != 3) {
+		fprintf(stderr, "Usage: %s FILE_PATH TIMESTAMP\n", argv[0]);
+		return EXIT_FAILURE;
+	}
+
+	mtime = strtol(argv[2], &endptr, 10);
+
+	if (*endptr != '\0') {
+		fprintf(stderr, "TIMESTAMP must not include non-digits\n");
+		return EXIT_FAILURE;
+	}
+
+	return set_link_mtime(argv[1], mtime);
+}