diff options
Diffstat (limited to 'io/getwd.c')
| -rw-r--r-- | io/getwd.c | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/io/getwd.c b/io/getwd.c index 4488cef00e..510a681d78 100644 --- a/io/getwd.c +++ b/io/getwd.c @@ -1,4 +1,5 @@ -/* Copyright (C) 1991, 1992, 1996 Free Software Foundation, Inc. +/* Obsolete function to get current working directory. + Copyright (C) 1991, 1992, 1996 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -21,19 +22,15 @@ #include <string.h> #include <unistd.h> -/* Put the absolute pathname of the current working direction in BUF. - If successful, return BUF. If not, put an error message in - BUF and return NULL. BUF should be at least PATH_MAX bytes long. */ + char * getwd (buf) char *buf; { #ifndef PATH_MAX #define PATH_MAX 1024 - char fetchbuf[PATH_MAX]; -#else -#define fetchbuf buf #endif + char tmpbuf[PATH_MAX]; if (buf == NULL) { @@ -41,18 +38,21 @@ getwd (buf) return NULL; } - if (getcwd (fetchbuf, PATH_MAX) == NULL) + if (getcwd (tmpbuf, LOCAL_PATH_MAX) == NULL) { -#if defined HAVE_STRERROR_R || defined _LIBC - __strerror_r (errno, buf, PATH_MAX); -#else - strncpy (buf, strerror (errno), PATH_MAX); -#endif + /* We use 1024 here since it should really be enough and because + this is a save value. */ + __strerror_r (errno, buf, 1024); return NULL; } - if (fetchbuf != buf) - strcpy (buf, fetchbuf); + /* This is completely unsafe. Nobody can say how big the user + provided buffer is. Perhaps the application and the libc + disagree about the value of PATH_MAX. */ + strcpy (buf, tmpbuf); return buf; } + +link_warning (getwd, + "the `getwd' function is dangerous and should not be used.") |