add rm, thanks rob

rm.c

@@ -0,0 +1,58 @@
+/* See LICENSE file for copyright and license details. */
+#include <dirent.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include "util.h"
+
+static void rm(const char *);
+
+static bool rflag = 0;
+
+int
+main(int argc, char *argv[])
+{
+	char c;
+
+	while((c = getopt(argc, argv, "fr")) != -1)
+		switch(c) {
+		case 'f':
+			break;
+		case 'r':
+			rflag = true;
+			break;
+		default:
+			exit(EXIT_FAILURE);
+		}
+	for(; optind < argc; optind++)
+		rm(argv[optind]);
+	return EXIT_SUCCESS;
+}
+
+void rm(const char *path)
+{
+	if(remove(path) == 0)
+		return;
+	if(errno == ENOTEMPTY && rflag) {
+		struct dirent *d;
+		DIR *dp;
+
+		if(!(dp = opendir(path)))
+			eprintf("opendir %s:", path);
+		if(chdir(path) != 0)
+			eprintf("chdir %s:", path);
+		while((d = readdir(dp)))
+			if(strcmp(d->d_name, ".") && strcmp(d->d_name, ".."))
+				rm(d->d_name);
+
+		closedir(dp);
+		if(chdir("..") != 0)
+			eprintf("chdir:");
+		if(remove(path) == 0)
+			return;
+	}
+	eprintf("remove %s:", path);
+}