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sbase/pwd.c
2011-06-04 12:20:41 +01:00

45 lines
815 B
C

/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include "util.h"
static const char *getpwd(const char *cwd);
int
main(int argc, char *argv[])
{
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);
return EXIT_SUCCESS;
}
const char *
getpwd(const char *cwd)
{
const char *pwd;
struct stat cst, pst;
if(!(pwd = getenv("PWD")) || pwd[0] != '/' || stat(pwd, &pst) == -1)
return cwd;
if(stat(cwd, &cst) == -1)
eprintf("stat %s:", cwd);
if(pst.st_dev == cst.st_dev && pst.st_ino == cst.st_ino)
return pwd;
else
return cwd;
}