57 lines
1.8 KiB
Diff
57 lines
1.8 KiB
Diff
From ad6de316cca655cd8b0b20b3e9dd18e7e98e443a Mon Sep 17 00:00:00 2001
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From: Paul Eggert <eggert@cs.ucla.edu>
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Date: Sat, 21 Aug 2021 10:44:17 -0700
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Subject: [PATCH] =?UTF-8?q?grep:=20avoid=20sticky=20problem=20with?=
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=?UTF-8?q?=20=E2=80=98-f=20-=20-f=20-=E2=80=99?=
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Inspired by bug#50129 even though this is a different bug.
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* src/grep.c (main): For ‘-f -’, use clearerr (stdin) after
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reading, so that ‘grep -f - -f -’ reads stdin twice even
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when stdin is a tty. Also, for ‘-f FILE’, report any
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I/O error when closing FILE.
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---
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src/grep.c | 17 +++++++++++------
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1 file changed, 11 insertions(+), 6 deletions(-)
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diff --git a/src/grep.c b/src/grep.c
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index 7a33686..b2a0566 100644
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--- a/src/grep.c
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+++ b/src/grep.c
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@@ -2477,7 +2477,6 @@ main (int argc, char **argv)
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int matcher = -1;
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int opt;
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int prev_optind, last_recursive;
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- int fread_errno;
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intmax_t default_context;
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FILE *fp;
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exit_failure = EXIT_TROUBLE;
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@@ -2648,11 +2647,17 @@ main (int argc, char **argv)
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if (cc == 0)
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break;
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}
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- fread_errno = errno;
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- if (ferror (fp))
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- die (EXIT_TROUBLE, fread_errno, "%s", optarg);
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- if (fp != stdin)
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- fclose (fp);
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+ int err = errno;
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+ if (!ferror (fp))
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+ {
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+ err = 0;
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+ if (fp == stdin)
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+ clearerr (fp);
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+ else if (fclose (fp) != 0)
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+ err = errno;
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+ }
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+ if (err)
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+ die (EXIT_TROUBLE, err, "%s", optarg);
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/* Append final newline if file ended in non-newline. */
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if (newkeycc != keycc && keys[newkeycc - 1] != '\n')
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keys[newkeycc++] = '\n';
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--
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1.8.3.1
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