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-rw-r--r--libc/stdio/stdio.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/libc/stdio/stdio.c b/libc/stdio/stdio.c
index 281dc5bf5..1bdccbfe9 100644
--- a/libc/stdio/stdio.c
+++ b/libc/stdio/stdio.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2002 Manuel Novoa III
+/* Copyright (C) 2002,2003,2004 Manuel Novoa III
* My stdio library for linux and (soon) elks.
*
* This library is free software; you can redistribute it and/or
@@ -80,6 +80,12 @@
*
* Nov 17, 2003
* Fix the return value for fputs when passed an empty string.
+ *
+ * Jan 1, 2004
+ * Fix __freadable and __fwritable... were using '~' instead of '!'. (ugh)
+ * Fix (hopefully) a potential problem with failed freopen() calls. The
+ * fix isn't tested since I've been working on the replacement stdio
+ * core code which will go in after the next release.
*/
/* Before we include anything, convert L_ctermid to L_ctermid_function
@@ -984,7 +990,7 @@ int __fwriting(FILE * __restrict stream)
int __freadable(FILE * __restrict stream)
{
- return ~(stream->modeflags & __FLAG_WRITEONLY);
+ return !(stream->modeflags & __FLAG_WRITEONLY);
}
#endif
@@ -995,7 +1001,7 @@ int __freadable(FILE * __restrict stream)
int __fwritable(FILE * __restrict stream)
{
- return ~(stream->modeflags & __FLAG_READONLY);
+ return !(stream->modeflags & __FLAG_READONLY);
}
#endif
@@ -2352,9 +2358,6 @@ FILE *_stdio_fopen(const char * __restrict filename,
open_mode = (O_WRONLY | O_CREAT | O_APPEND);
if (*mode != 'a') { /* not write (create or append) */
__set_errno(EINVAL); /* then illegal mode */
- if (stream) { /* If this is freopen, free the stream. */
- goto FREE_STREAM;
- }
return NULL;
}
}
@@ -2450,7 +2453,6 @@ FILE *_stdio_fopen(const char * __restrict filename,
}
if (stream->filedes < 0) {
- FREE_STREAM:
#ifdef __STDIO_BUFFERS
if (stream->modeflags & __FLAG_FREEBUF) {
free(stream->bufstart);
@@ -2543,8 +2545,8 @@ FILE *freopen(const char * __restrict filename, const char * __restrict mode,
* supports this, so we don't here.
*
* NOTE: Whether or not the stream is free'd on failure is unclear
- * w.r.t. ANSI/ISO. This implementation chooses to free the
- * stream and associated buffer if they were dynamically
+ * w.r.t. ANSI/ISO. This implementation chooses to NOT free
+ * the stream and associated buffer if they were dynamically
* allocated.
* TODO: Check the above.
* TODO: Apparently linux allows setting append mode. Implement?
@@ -2564,10 +2566,11 @@ FILE *freopen(const char * __restrict filename, const char * __restrict mode,
stream->modeflags &= ~(__FLAG_FREEBUF|__FLAG_FREEFILE);
fclose(stream); /* Failures are ignored. */
- stream->modeflags = dynmode;
fp = _stdio_fopen(filename, mode, stream, -1);
+ stream->modeflags |= dynmode;
+
__STDIO_THREADUNLOCK(stream);
return fp;