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Add _flags2 per jhb@ suggestion since no room left in _flags.

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Rewrite O_APPEND flag checking using new __S2OAP flag.

MFC after:      3 weeks
This commit is contained in:
Andrey A. Chernov 2015-10-28 14:40:02 +00:00
parent 4648ee9525
commit 8b63538d89
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=290110
7 changed files with 10 additions and 10 deletions
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3
include/stdio.h
View file

@ -144,6 +144,7 @@ struct __sFILE {
int _fl_count; /* recursive lock count */
int _orientation; /* orientation for fwide() */
__mbstate_t _mbstate; /* multibyte conversion state */
int _flags2; /* additional flags */
};
#ifndef _STDFILE_DECLARED
#define _STDFILE_DECLARED
@ -176,6 +177,8 @@ __END_DECLS
#define __SALC 0x4000 /* allocate string space dynamically */
#define __SIGN 0x8000 /* ignore this file in _fwalk */
#define __S2OAP 0x0001 /* O_APPEND mode is set */
/*
* The following three definitions are for ANSI C, which took them
* from System V, which brilliantly took internal interface macros and

3
lib/libc/stdio/fdopen.c
View file

@ -91,9 +91,8 @@ fdopen(int fd, const char *mode)
* O_APPEND bit set, assert __SAPP so that __swrite() caller
* will _sseek() to the end before write.
*/
/* XXX: Reuse __SALC for O_APPEND. */
if (fdflags & O_APPEND)
fp->_flags |= __SALC;
fp->_flags2 |= __S2OAP;
else if (oflags & O_APPEND)
fp->_flags |= __SAPP;
fp->_file = fd;

1
lib/libc/stdio/findfp.c
View file

@ -155,6 +155,7 @@ __sfp(void)
/* fp->_fl_mutex = NULL; */ /* once set always set (reused) */
fp->_orientation = 0;
memset(&fp->_mbstate, 0, sizeof(mbstate_t));
fp->_flags2 = 0;
return (fp);
}

3
lib/libc/stdio/fopen.c
View file

@ -92,8 +92,7 @@ fopen(const char * __restrict file, const char * __restrict mode)
* fseek and ftell.)
*/
if (oflags & O_APPEND) {
/* XXX: Reuse __SALC for O_APPEND. */
fp->_flags |= __SALC;
fp->_flags2 |= __S2OAP;
(void)_sseek(fp, (fpos_t)0, SEEK_END);
}
return (fp);

4
lib/libc/stdio/freopen.c
View file

@ -187,6 +187,7 @@ freopen(const char * __restrict file, const char * __restrict mode,
fp->_lb._size = 0;
fp->_orientation = 0;
memset(&fp->_mbstate, 0, sizeof(mbstate_t));
fp->_flags2 = 0;
if (f < 0) { /* did not get it after all */
if (isopen)
@ -241,8 +242,7 @@ freopen(const char * __restrict file, const char * __restrict mode,
* fseek and ftell.)
*/
if (oflags & O_APPEND) {
/* XXX: Reuse __SALC for O_APPEND. */
fp->_flags |= __SALC;
fp->_flags2 |= __S2OAP;
(void) _sseek(fp, (fpos_t)0, SEEK_END);
}
FUNLOCKFILE(fp);

3
lib/libc/stdio/ftell.c
View file

@ -119,8 +119,7 @@ _ftello(FILE *fp, fpos_t *offset)
if (HASUB(fp))
pos -= fp->_r; /* Can be negative at this point. */
} else if ((fp->_flags & __SWR) && fp->_p != NULL) {
/* XXX: Reuse __SALC for O_APPEND. */
if (fp->_flags & (__SAPP|__SALC)) {
if ((fp->_flags & __SAPP) || (fp->_flags2 & __S2OAP)) {
int serrno = errno;
errno = 0;

3
lib/libc/stdio/stdio.c
View file

@ -117,8 +117,7 @@ _swrite(FILE *fp, char const *buf, int n)
ret = (*fp->_write)(fp->_cookie, buf, n);
/* __SOFF removed even on success in case O_APPEND mode is set. */
if (ret >= 0) {
/* XXX: Reuse __SALC for O_APPEND. */
if ((fp->_flags & __SOFF) && !(fp->_flags & __SALC) &&
if ((fp->_flags & __SOFF) && !(fp->_flags2 & __S2OAP) &&
fp->_offset <= OFF_MAX - ret)
fp->_offset += ret;
else