d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

If file offset is smaller than internal buffer character left count, just drop

Browse Source 
internal buffer and trust offset, not return error.
This commit is contained in:
Andrey A. Chernov 2001-08-31 14:11:14 +00:00
parent 14b62f116d
commit ee75810413
2 changed files with 30 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

30
lib/libc/stdio/fseek.c
View File

@ -104,7 +104,7 @@ _fseeko(fp, offset, whence, ltest)
int ltest;
{
register fpos_t (*seekfn) __P((void *, fpos_t, int));
fpos_t target, curoff;
fpos_t target, curoff, spos;
size_t n;
struct stat st;
int havepos;
@ -137,6 +137,7 @@ _fseeko(fp, offset, whence, ltest)
return (-1);
}
if (fp->_flags & __SRD) {
spos = curoff;
curoff -= fp->_r;
if (curoff < 0) {
if (HASUB(fp)) {
@ -144,8 +145,9 @@ _fseeko(fp, offset, whence, ltest)
fp->_r += curoff;
curoff = 0;
} else {
errno = EBADF;
return (-1);
fp->_p = fp->_bf._base;
fp->_r = 0;
curoff = spos;
}
}
if (HASUB(fp)) {
@ -156,8 +158,10 @@ _fseeko(fp, offset, whence, ltest)
fp->_r += curoff;
curoff = 0;
} else {
errno = EBADF;
return (-1);
fp->_p = fp->_bf._base;
fp->_r = 0;
FREEUB(fp);
curoff = spos;
}
}
}
@ -256,14 +260,18 @@ _fseeko(fp, offset, whence, ltest)
if (curoff == POS_ERR)
goto dumb;
}
spos = curoff;
curoff -= fp->_r;
if (curoff < 0) {
if (HASUB(fp)) {
fp->_p -= curoff;
fp->_r += curoff;
curoff = 0;
} else
goto dumb;
} else {
fp->_p = fp->_bf._base;
fp->_r = 0;
curoff = spos;
}
}
if (HASUB(fp)) {
curoff -= fp->_ur;
@ -272,8 +280,12 @@ _fseeko(fp, offset, whence, ltest)
fp->_p -= curoff;
fp->_r += curoff;
curoff = 0;
} else
goto dumb;
} else {
fp->_p = fp->_bf._base;
fp->_r = 0;
FREEUB(fp);
curoff = spos;
}
}
}
}

16
lib/libc/stdio/ftell.c
View File

@ -75,7 +75,7 @@ off_t
ftello(fp)
register FILE *fp;
{
register fpos_t pos;
register fpos_t pos, spos;
size_t n;
if (fp->_seek == NULL) {
@ -103,6 +103,7 @@ ftello(fp)
* those from ungetc) cause the position to be
* smaller than that in the underlying object.
*/
spos = pos;
pos -= fp->_r;
if (pos < 0) {
if (HASUB(fp)) {
@ -110,9 +111,9 @@ ftello(fp)
fp->_r += pos;
pos = 0;
} else {
errno = EBADF;
FUNLOCKFILE(fp);
return (-1);
fp->_p = fp->_bf._base;
fp->_r = 0;
pos = spos;
}
}
if (HASUB(fp)) {
@ -123,9 +124,10 @@ ftello(fp)
fp->_r += pos;
pos = 0;
} else {
errno = EBADF;
FUNLOCKFILE(fp);
return (-1);
fp->_p = fp->_bf._base;
fp->_r = 0;
FREEUB(fp);
pos = spos;
}
}
}