1 files changed, 48 insertions, 6 deletions
diff --git a/utils/mkdir/mkdir.c b/utils/mkdir/mkdir.c
index 5bdf53c0..b47ee54d 100644
--- a/utils/mkdir/mkdir.c
+++ b/utils/mkdir/mkdir.c
@@ -1,14 +1,56 @@
 #include <lib9.h>
 
-void
-main(int argc, char **argv)
+static void
+usage(void)
+{
+	fprint(2, "usage: mkdir [-p] dir ...\n");
+	exits("usage");
+}
+
+static int
+mkdirp(char *s, int pflag)
 {
-	for(argv++; *argv; argv++){
-		if(access(*argv, 0) == 0){
-			fprint(2, "mkdir: %s already exists\n", *argv);
+	char *p;
+
+	if(!pflag) {
+		if(access(s, 0) == 0){
+			fprint(2, "mkdir: %s already exists\n", s);
 			exits("exists");
 		}
-		if(mkdir(*argv) < 0){
+		return mkdir(s);
+	}
+
+	/* create intermediate directories */
+	p = strchr(s+1, '/');
+	while(p != nil) {
+		*p = '\0';
+		if(access(s, 0) != 0 && mkdir(s) != 0)
+			return -1;
+		*p = '/';
+		p = strchr(p+1, '/');
+	}
+
+	/* create final directory */
+	if(access(s, 0) == 0)
+		return 0;
+	return mkdir(s);
+}
+
+void
+main(int argc, char **argv)
+{
+	int pflag;
+
+	pflag = 0;
+	ARGBEGIN{
+	case 'p':
+		pflag++;
+		break;
+	default:
+		usage();
+	}ARGEND
+	for(; *argv; argv++){
+		if(mkdirp(*argv, pflag) < 0){
 			fprint(2, "mkdir: can't create %s\n", *argv);
 			perror(0);
 			exits("error");