implement cp and mv and improve rm

util/cp.c

@@ -0,0 +1,59 @@
+/* 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 <sys/stat.h>
+#include "../fs.h"
+#include "../text.h"
+#include "../util.h"
+
+bool cp_rflag = false;
+
+int
+cp(const char *s1, const char *s2)
+{
+	FILE *f1, *f2;
+	char *ns1, *ns2;
+	long size1, size2;
+	struct dirent *d;
+	struct stat st;
+	DIR *dp;
+
+	if (stat(s1, &st) == 0 && S_ISDIR(st.st_mode)) {
+		if (!cp_rflag) {
+			eprintf("%s: is a directory\n", s1);
+		}
+		else {
+			if(!(dp = opendir(s1)))
+				eprintf("opendir %s:", s1);
+			if (mkdir(s2, st.st_mode) == -1 && errno != EEXIST)
+				eprintf("mkdir %s:", s2);
+			apathmax(&ns1, &size1);
+			apathmax(&ns2, &size2);
+			while((d = readdir(dp)))
+				if(strcmp(d->d_name, ".") && strcmp(d->d_name, "..")) {
+					if(snprintf(ns1, size1, "%s/%s", s1, d->d_name) > size1)
+						eprintf("%s/%s: filename too long\n", s1, d->d_name);
+					if(snprintf(ns2, size2, "%s/%s", s2, d->d_name) > size2)
+						eprintf("%s/%s: filename too long\n", s2, d->d_name);
+					fnck(ns1, ns2, cp);
+				}
+			closedir(dp);
+			free(ns1);
+			free(ns2);
+		}
+		return 0;
+	}
+	if(!(f1 = fopen(s1, "r")))
+		eprintf("fopen %s:", s1);
+	if(!(f2 = fopen(s2, "w")))
+		eprintf("fopen %s:", s2);
+	concat(f1, s1, f2, s2);
+	fclose(f2);
+	fclose(f1);
+	return 0;
+}