migrate to gitlab

1 files changed, 122 insertions, 0 deletions

diff --git a/cd.c b/cd.c
new file mode 100644
index 0000000..a914c19
--- /dev/null
+++ b/cd.c
@@ -0,0 +1,122 @@
+/*
+ * UNG's Not GNU
+ *
+ * Copyright (c) 2011-2017, Jakob Kaivo <jkk@ung.org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#include "sh.h"
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <string.h>
+#include <unistd.h>
+
+#define FLAG_L (1)
+#define FLAG_P (2)
+
+static int cd(char *path, int flag)
+{
+	int alloced = 0;
+	int print = 0;
+
+	if (path == NULL) {
+		path = getenv("HOME");
+		if (path == NULL || !strcmp(path, "")) {
+			fprintf(stderr, "cd: Directory not specified and HOME not found\n");
+			return 1;
+		}
+	}
+
+	if (!strcmp(path, "-")) {
+		path = getenv("OLDPWD");
+		print = 1;
+	}
+
+	/*
+	if (!(path[0] == '/' || !strncmp(path, "./", 2) || !strncmp(path, "../", 3))) {
+		char *opath = path;
+		path = sh_find_in_path(opath, "CDPATH");
+		if (path == NULL) {
+			fprintf(stderr, "cd: %s not found in CDPATH\n", opath);
+			return 1;
+		}
+		alloced = 1;
+	}
+	*/
+
+	if (flag != FLAG_P) {
+		if (path[0] != '/') {
+			char *base = getenv("PWD");
+			char newpath[strlen(base) + strlen(path)];
+			sprintf(newpath, "%s/%s", base, path);
+			strcpy(path, newpath);
+		}
+
+		/* TODO: canonicalize path */
+		/* TODO: shorten to <= PATH_MAX */
+	}
+
+	char *oldpwd = getenv("PWD");
+	if (chdir(path) != 0) {
+		if (alloced) {
+			free(path);
+		}
+
+		fprintf(stderr, "cd: Couldn't change to %s: %s\n", path, strerror(errno));
+		return 1;
+	}
+
+	if (alloced) {
+		free(path);
+	}
+
+	if (print) {
+		puts(path);
+	}
+
+	setenv("OLDPWD", oldpwd, 1);
+	setenv("PWD", path, 1);
+	return 0;
+}
+
+int cd_main(int argc, char *argv[])
+{
+	int flag = 0;
+	int c;
+
+	while ((c = getopt(argc, argv, ":LP")) != -1) {
+		switch (c) {
+		case 'L':
+			flag = FLAG_L;
+			break;
+
+		case 'P':
+			flag = FLAG_P;
+			break;
+
+		default:
+			return 1;
+		}
+	}
+
+	if (optind < argc - 1) {
+		fprintf(stderr, "cd: too many arguments\n");
+		return 1;
+	}
+
+	return cd(argv[optind], flag);
+}