initial commit

touch.c

@@ -0,0 +1,58 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+#include <utime.h>
+#include <sys/stat.h>
+#include "util.h"
+
+static void touch(const char *);
+
+static bool cflag = false;
+static time_t t;
+
+int
+main(int argc, char *argv[])
+{
+	int i;
+
+	t = time(NULL);
+
+	for(i = 1; i < argc; i++)
+		if(!strcmp(argv[i], "-c"))
+			cflag = true;
+		else if(!strcmp(argv[i], "-t") && i+1 < argc)
+			t = strtol(argv[++i], NULL, 0);
+		else
+			break;
+
+	for(; i < argc; i++)
+		touch(argv[i]);
+	return EXIT_SUCCESS;
+}
+
+void
+touch(const char *str)
+{
+	int fd;
+	struct stat st;
+	struct utimbuf ut;
+
+	if(stat(str, &st) < 0) {
+		if(errno != ENOENT)
+			eprintf("stat %s:", str);
+		if(cflag)
+			return;
+		if((fd = creat(str, O_RDONLY|S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP|S_IROTH|S_IWOTH)) < 0)
+			eprintf("creat %s:", str);
+		close(fd);
+	}
+	ut.actime = st.st_atime;
+	ut.modtime = t;
+	if(utime(str, &ut) < 0)
+		eprintf("utime %s:", str);
+}