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Open with non-blocking I/O and then reset the flags to avoid blocking for 

FIFOs. This is a lot easier to do than adding another stat(2) to avoid open(2).
This commit is contained in:
christos 2021-12-28 19:22:58 +00:00
parent 0332878aff
commit 6e96237455
1 changed files with 5 additions and 2 deletions
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7
external/gpl2/grep/dist/src/grep.c vendored
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@ -1,4 +1,4 @@
/* $NetBSD: grep.c,v 1.3 2021/12/28 14:59:02 christos Exp $ */
/* $NetBSD: grep.c,v 1.4 2021/12/28 19:22:58 christos Exp $ */
/* grep.c - main driver file for grep.
Copyright 1992, 1997-1999, 2000 Free Software Foundation, Inc.
@ -911,9 +911,12 @@ grepfile (char const *file, struct stats *stats)
}
else
{
while ((desc = open (file, O_RDONLY)) < 0 && errno == EINTR)
while ((desc = open (file, O_RDONLY | O_NONBLOCK)) < 0 && errno == EINTR)
continue;
if (desc >= 0 && (status = fcntl (desc, F_GETFL, 0)) != -1)
fcntl (desc, F_SETFL, status & ~O_NONBLOCK);
if (desc < 0)
{
int e = errno;