Contents of /tags/mkinitrd-6_1_6/busybox/libbb/xgetcwd.c
Parent Directory | Revision Log
Revision 903 -
(show annotations)
(download)
Wed Aug 5 19:21:45 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 948 byte(s)
Wed Aug 5 19:21:45 2009 UTC (15 years, 1 month ago) by niro
File MIME type: text/plain
File size: 948 byte(s)
tagged 'mkinitrd-6_1_6'
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * xgetcwd.c -- return current directory with unlimited length |
4 | * Copyright (C) 1992, 1996 Free Software Foundation, Inc. |
5 | * Written by David MacKenzie <djm@gnu.ai.mit.edu>. |
6 | * |
7 | * Special function for busybox written by Vladimir Oleynik <dzo@simtreas.ru> |
8 | */ |
9 | |
10 | #include "libbb.h" |
11 | |
12 | /* Return the current directory, newly allocated, arbitrarily long. |
13 | Return NULL and set errno on error. |
14 | If argument is not NULL (previous usage allocate memory), call free() |
15 | */ |
16 | |
17 | char* FAST_FUNC |
18 | xrealloc_getcwd_or_warn(char *cwd) |
19 | { |
20 | #define PATH_INCR 64 |
21 | |
22 | char *ret; |
23 | unsigned path_max; |
24 | |
25 | path_max = 128; /* 128 + 64 should be enough for 99% of cases */ |
26 | |
27 | while (1) { |
28 | path_max += PATH_INCR; |
29 | cwd = xrealloc(cwd, path_max); |
30 | ret = getcwd(cwd, path_max); |
31 | if (ret == NULL) { |
32 | if (errno == ERANGE) |
33 | continue; |
34 | free(cwd); |
35 | bb_perror_msg("getcwd"); |
36 | return NULL; |
37 | } |
38 | cwd = xrealloc(cwd, strlen(cwd) + 1); |
39 | return cwd; |
40 | } |
41 | } |