mirror of
https://github.com/sheumann/hush.git
synced 2024-11-18 17:10:36 +00:00
49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/*
|
|
* xgetcwd.c -- return current directory with unlimited length
|
|
* Copyright (C) 1992, 1996 Free Software Foundation, Inc.
|
|
* Written by David MacKenzie <djm@gnu.ai.mit.edu>.
|
|
*
|
|
* Special function for busybox written by Vladimir Oleynik <dzo@simtreas.ru>
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <sys/param.h>
|
|
#include "libbb.h"
|
|
|
|
/* Amount to increase buffer size by in each try. */
|
|
#define PATH_INCR 32
|
|
|
|
/* Return the current directory, newly allocated, arbitrarily long.
|
|
Return NULL and set errno on error.
|
|
If argument is not NULL (previous usage allocate memory), call free()
|
|
*/
|
|
|
|
char *
|
|
xgetcwd (char *cwd)
|
|
{
|
|
char *ret;
|
|
unsigned path_max;
|
|
|
|
path_max = (unsigned) PATH_MAX;
|
|
path_max += 2; /* The getcwd docs say to do this. */
|
|
|
|
if(cwd==0)
|
|
cwd = xmalloc (path_max);
|
|
|
|
while ((ret = getcwd (cwd, path_max)) == NULL && errno == ERANGE) {
|
|
path_max += PATH_INCR;
|
|
cwd = xrealloc (cwd, path_max);
|
|
}
|
|
|
|
if (ret == NULL) {
|
|
free (cwd);
|
|
bb_perror_msg("getcwd()");
|
|
return NULL;
|
|
}
|
|
|
|
return cwd;
|
|
}
|