hush/libbb/xgetcwd.c
Stephen Heumann dc2193b997 Translate colons to slashes in the current path name, for compatibility with Unix-style usage.
As an exception, the translation isn't done if there is a directory name containing a /.
2014-12-03 23:02:15 -06:00

54 lines
1.3 KiB
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 source tree.
*/
#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);
#ifdef __GNO__
/* Translate path to use slashes (unless it contains a directory
* name with a slash in it). This increases compatibility with
* scripts that expect paths to be in the normal Unix style. */
if (strchr(cwd, '/') == NULL) {
char *ch = cwd;
while ((ch = strchr(ch, ':')) != NULL)
*ch = '/';
}
#endif
return cwd;
}
}