sbase/pwd.c

45 lines
813 B
C
Raw Normal View History

2011-05-23 15:15:19 -04:00
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
2011-05-28 10:37:42 -04:00
#include <unistd.h>
#include <sys/stat.h>
2011-05-23 15:15:19 -04:00
#include "util.h"
2011-05-28 10:37:42 -04:00
static const char *getpwd(const char *cwd);
2011-05-23 15:15:19 -04:00
int
2011-05-28 10:37:42 -04:00
main(int argc, char *argv[])
2011-05-23 15:15:19 -04:00
{
2011-05-28 10:37:42 -04:00
char *cwd, c;
char mode = 'L';
while((c = getopt(argc, argv, "LP")) != -1)
switch(c) {
case 'L':
case 'P':
mode = c;
break;
default:
exit(EXIT_FAILURE);
}
cwd = agetcwd();
puts((mode == 'L') ? getpwd(cwd) : cwd);
2011-05-23 15:15:19 -04:00
return EXIT_SUCCESS;
}
2011-05-28 10:37:42 -04:00
const char *
getpwd(const char *cwd)
{
const char *pwd;
struct stat cst, pst;
if(!(pwd = getenv("PWD")) || pwd[0] != '/' || stat(pwd, &pst) != 0)
return cwd;
if(stat(cwd, &cst) != 0)
eprintf("stat %s:", cwd);
if(pst.st_dev == cst.st_dev && pst.st_ino == cst.st_ino)
return pwd;
else
return cwd;
}