44 lines
1023 B
C
44 lines
1023 B
C
/* vi: set sw=4 ts=4: */
|
|
/*
|
|
* 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>
|
|
*
|
|
* Licensed under GPLv2, see file LICENSE in this tarball for details.
|
|
*/
|
|
|
|
#include "libbb.h"
|
|
|
|
/* 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* FAST_FUNC
|
|
xrealloc_getcwd_or_warn(char *cwd)
|
|
{
|
|
#define PATH_INCR 64
|
|
|
|
char *ret;
|
|
unsigned path_max;
|
|
|
|
path_max = 128; /* 128 + 64 should be enough for 99% of cases */
|
|
|
|
while (1) {
|
|
path_max += PATH_INCR;
|
|
cwd = xrealloc(cwd, path_max);
|
|
ret = getcwd(cwd, path_max);
|
|
if (ret == NULL) {
|
|
if (errno == ERANGE)
|
|
continue;
|
|
free(cwd);
|
|
bb_perror_msg("getcwd");
|
|
return NULL;
|
|
}
|
|
cwd = xrealloc(cwd, strlen(cwd) + 1);
|
|
return cwd;
|
|
}
|
|
}
|