John Polstra 719077d1be Fix a bug in lseek which caused the loader to fail on some gzipped ... kernels. The error message was "elf_loadexec: cannot seek". Libstand maintains a read-ahead buffer for each open file, so that it can read in chunks of 512 bytes for greater efficiency. When the loader tries to lseek forward in a file by a small amount, it sometimes happens that the target file offset is already in the read-ahead buffer. But the lseek code simply discarded the contents of that buffer and performed a seek directly on the underlying file. This resulted in an attempt to seek backwards in the file, since some of the data has already been read into the read-ahead buffer. Gzipped data streams cannot seek backwards, so an error was returned. This commit adds code which checks to see if the desired file offset is already in the read-ahead buffer. If it is, the code simply adjusts the buffer pointer and length, thereby avoiding a reverse seek on the gzipped data stream. I incorporated a suggestion from Matt Dillon which saved a little bit of code in this fix. Reviewed by: dillon, gallatin, jhb		2001-08-29 23:33:22 +00:00
..
alpha
i386	Removed duplicate VCS ID tags, as per style(9).	2001-08-13 14:06:34 +00:00
ia64	Removed duplicate VCS ID tags, as per style(9).	2001-08-13 14:06:34 +00:00
powerpc	Make setjmp work our way, as opposed to NetBSD's.	2000-11-10 06:10:28 +00:00
__main.c
arp.c
assert.c	Make include file consistent with the rest of libstand.	2001-07-31 15:49:50 +00:00
bcd.c
bootp.c
bootp.h
bootparam.c
bootparam.h
bswap.c
cd9660.c	Bail if we go beyond the directory size, not just if we hit it.	2001-08-23 17:08:26 +00:00
close.c
closeall.c
dev_net.c
dev_net.h
dev.c
dosfs.c
dosfs.h
environment.c
ether.c
ext2fs.c	Fix typo: compatability -> compatibility.	2001-02-06 12:05:58 +00:00
fstat.c
getopt.c
gets.c
globals.c
gzipfs.c
if_ether.h
in_cksum.c
inet_ntoa.c
ioctl.c
iodesc.h
libstand.3	mdoc(7) police: s/BSD/.Bx/ where appropriate.	2001-08-14 10:01:54 +00:00
lseek.c	Fix a bug in lseek which caused the loader to fail on some gzipped	2001-08-29 23:33:22 +00:00
Makefile	MAN[1-9] -> MAN.	2001-03-27 17:27:19 +00:00
net.c
net.h
netif.c	Compensate for header dethreading.	2001-05-01 09:37:01 +00:00
netif.h
nfs.c
nfsv2.h
nullfs.c
open.c
pager.c	Silence -Wnon-const-format	2001-02-18 04:51:47 +00:00
printf.c
qdivrem.c
quad.h
random.c
rarp.c
read.c
readdir.c
rpc.c
rpc.h
rpcv2.h
saioctl.h
sbrk.c
stand.h	Replace functional bugs of ctypish functions in libstand with style	2001-05-14 16:49:20 +00:00
stat.c
strcasecmp.c
strdup.c
strerror.c
strtol.c
tftp.c	Reset errno so that subsequent TFTP requests don't fail after the	2001-06-30 21:39:09 +00:00
tftp.h
twiddle.c
udp.c	Correct the returned UDP datagram length. See the PR for a more comprehensive	2001-05-28 22:27:06 +00:00
ufs.c
write.c
zalloc_defs.h	A quick and dirty port of libstand to ia64.	2001-03-06 16:11:36 +00:00
zalloc_malloc.c
zalloc_mem.h
zalloc_protos.h
zalloc.c
zipfs.c