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/*
* 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);
}
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