Nate Williams 692a99c012 Date: Wed, 26 Oct 1994 15:44:49 -0600 ... From: Chris Torek <torek@bsdi.com> Here is a semi-official patch (apply to /usr/src/lib/libc/stdio/fseek.c, rebuild libc, install). The current code fails when the seek: - is optimized, and - is to just past the end of the block currently in the buffer, and - is followed by another seek with no intervening read operation, and - the destination of subsequent seek is within the block left in the buffer (seeking to the beginning of a block does not force a read, so the buffer still contains the previous block) so it is indeed rather obscure. I may have a different `final' fix, as this one `loses' the buffer contents on a seek that goes just past the end of the current block. [Footnote: seeks are optimized only on read-only opens of regular files that are buffered by the file's optimal I/O size. This is what you get with fopen(path, "r") and no call to setvbuf().] Obtained from: [ BSDI mailing list ]		1994-11-05 18:49:34 +00:00
..
clrerr.c
fclose.3
fclose.c
fdopen.c
feof.c
ferror.3
ferror.c
fflush.3
fflush.c
fgetc.c
fgetln.3
fgetln.c
fgetpos.c
fgets.3
fgets.c
fileno.c
findfp.c
flags.c
floatio.h
fopen.3
fopen.c
fprintf.c
fpurge.c
fputc.c
fputs.3
fputs.c
fread.3
fread.c
freopen.c
fscanf.c
fseek.3
fseek.c
fsetpos.c
ftell.c
funopen.3
funopen.c
fvwrite.c
fvwrite.h
fwalk.c
fwrite.c
getc.3
getc.c
getchar.c
gets.c
getw.c
glue.h
local.h
makebuf.c
Makefile.inc
mktemp.3
mktemp.c
perror.c
printf.3
printf.c
putc.3
putc.c
putchar.c
puts.c
putw.c
refill.c
remove.3
remove.c
rewind.c
rget.c
scanf.3
scanf.c
setbuf.3
setbuf.c
setbuffer.c
setvbuf.c
snprintf.c
sprintf.c
sscanf.c
stdio.3
stdio.c
tempnam.c
tmpfile.c
tmpnam.3
tmpnam.c
ungetc.3
ungetc.c
vfprintf.c
vfscanf.c
vprintf.c
vscanf.c
vsnprintf.c
vsprintf.c
vsscanf.c
wbuf.c
wsetup.c