Bugfix:

Delete ugly and incorrect workaround for a Linux kernel bug.
If a file is temporarily empty, that by no means implies
it might be permanently non-seekable.

Patch from seL4 at disroot dot org on tech@.
OK both Theos: tb@ and deraadt@

diff --git a/usr.bin/less/ch.c b/usr.bin/less/ch.c
index 1a67976..d7c0aa3 100644 (file)
--- a/usr.bin/less/ch.c
+++ b/usr.bin/less/ch.c
@@ -643,19 +643,6 @@ ch_flush(void)
        ch_block = 0; /* ch_fpos / LBUFSIZE; */
        ch_offset = 0; /* ch_fpos % LBUFSIZE; */
 
-#if 1
-       /*
-        * This is a kludge to workaround a Linux kernel bug: files in
-        * /proc have a size of 0 according to fstat() but have readable
-        * data.  They are sometimes, but not always, seekable.
-        * Force them to be non-seekable here.
-        */
-       if (ch_fsize == 0) {
-               ch_fsize = -1;
-               ch_flags &= ~CH_CANSEEK;
-       }
-#endif
-
        if (lseek(ch_file, (off_t)0, SEEK_SET) == (off_t)-1) {
                /*
                 * Warning only; even if the seek fails for some reason,