Import sources from 2011-03-30 iso image

1 files changed, 65 insertions, 0 deletions

diff --git a/sys/src/cmd/touch.c b/sys/src/cmd/touch.c
new file mode 100755
index 000000000..8da7e61bd
--- /dev/null
+++ b/sys/src/cmd/touch.c
@@ -0,0 +1,65 @@
+#include <u.h>
+#include <libc.h>
+
+int touch(int, char *);
+ulong now;
+
+void
+usage(void)
+{
+	fprint(2, "usage: touch [-c] [-t time] files\n");
+	exits("usage");
+}
+
+void
+main(int argc, char **argv)
+{
+	char *t, *s;
+	int nocreate = 0;
+	int status = 0;
+
+	now = time(0);
+	ARGBEGIN{
+	case 't':
+		t = EARGF(usage());
+		now = strtoul(t, &s, 0);
+		if(s == t || *s != '\0')
+			usage();
+		break;
+	case 'c':
+		nocreate = 1;
+		break;
+	default:	
+		usage();
+	}ARGEND
+
+	if(!*argv)
+		usage();
+	while(*argv)
+		status += touch(nocreate, *argv++);
+	if(status)
+		exits("touch");
+	exits(0);
+}
+
+touch(int nocreate, char *name)
+{
+	Dir stbuff;
+	int fd;
+
+	nulldir(&stbuff);
+	stbuff.mtime = now;
+	if(dirwstat(name, &stbuff) >= 0)
+		return 0;
+	if(nocreate){
+		fprint(2, "touch: %s: cannot wstat: %r\n", name);
+		return 1;
+	}
+	if((fd = create(name, OREAD|OEXCL, 0666)) < 0){
+		fprint(2, "touch: %s: cannot create: %r\n", name);
+		return 1;
+	}
+	dirfwstat(fd, &stbuff);
+	close(fd);
+	return 0;
+}