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author | Andreas Baumann <mail@andreasbaumann.cc> | 2015-01-03 12:04:58 +0100 |
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committer | Andreas Baumann <mail@andreasbaumann.cc> | 2015-01-03 12:04:58 +0100 |
commit | 008d0be72b2f160382c6e880765e96b64a050c65 (patch) | |
tree | 36f48a98a3815a408e2ce1693dd182af90f80305 /release/src/router/busybox/libbb/xgetcwd.c | |
parent | 611becfb8726c60cb060368541ad98191d4532f5 (diff) | |
download | tomato-008d0be72b2f160382c6e880765e96b64a050c65.tar.gz tomato-008d0be72b2f160382c6e880765e96b64a050c65.tar.bz2 |
imported original firmware WRT54GL_v4.30.11_11_US
Diffstat (limited to 'release/src/router/busybox/libbb/xgetcwd.c')
-rw-r--r-- | release/src/router/busybox/libbb/xgetcwd.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/release/src/router/busybox/libbb/xgetcwd.c b/release/src/router/busybox/libbb/xgetcwd.c new file mode 100644 index 00000000..27466816 --- /dev/null +++ b/release/src/router/busybox/libbb/xgetcwd.c @@ -0,0 +1,52 @@ +/* + * 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 <vodz@usa.net> +*/ + +#include <stdlib.h> +#include <errno.h> +#include <unistd.h> +#include <limits.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; + + errno = 0; + path_max = (unsigned) PATH_MAX; + path_max += 2; /* The getcwd docs say to do this. */ + + if(cwd==0) + cwd = xmalloc (path_max); + + errno = 0; + while ((ret = getcwd (cwd, path_max)) == NULL && errno == ERANGE) { + path_max += PATH_INCR; + cwd = xrealloc (cwd, path_max); + errno = 0; + } + + if (ret == NULL) { + int save_errno = errno; + free (cwd); + errno = save_errno; + perror_msg("getcwd()"); + return NULL; + } + + return cwd; +} |