diff options
Diffstat (limited to 'gnulib/lib/openat-proc.c')
| -rw-r--r-- | gnulib/lib/openat-proc.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/gnulib/lib/openat-proc.c b/gnulib/lib/openat-proc.c index e84dc454..76e1c6dd 100644 --- a/gnulib/lib/openat-proc.c +++ b/gnulib/lib/openat-proc.c @@ -1,6 +1,6 @@ /* Create /proc/self/fd-related names for subfiles of open directories. - Copyright (C) 2006 Free Software Foundation, Inc. + Copyright (C) 2006, 2009 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -34,7 +34,10 @@ #include "xalloc.h" /* The results of open() in this file are not used with fchdir, - therefore save some unnecessary work in fchdir.c. */ + and we do not leak fds to any single-threaded code that could use stdio, + therefore save some unnecessary work in fchdir.c. + FIXME - if the kernel ever adds support for multi-thread safety for + avoiding standard fds, then we should use open_safer. */ #undef open #undef close @@ -54,6 +57,13 @@ openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file) { static int proc_status = 0; + /* Make sure the caller gets ENOENT when appropriate. */ + if (!*file) + { + buf[0] = '\0'; + return buf; + } + if (! proc_status) { /* Set PROC_STATUS to a positive value if /proc/self/fd is |