Subject: [GUILT] [PATCH 1/7] get rid of "cat: write error: Broken pipe" error message

From: Jonathan Nieder <[email-masked]>
Date: Tue, 15 Jan 2013 18:27:01 -0800

From: Per Cederqvist <[email-masked]>
Date: Tue, 13 Mar 2012 14:39:44 +0100

In some circumstances (like running guilt in a M-x shell buffer in
Emacs) cat may give the above error message when the reader of the
output from cat exits without reading all input from cat.  (In other
circumstances cat is just silently terminated with SIGPIPE.)

Get rid of the error by removing the useless use of cat in
do_get_header and do_get_full_header.

Signed-off-by: Per Cederqvist <[email-masked]>
Acked-by: Jeff Sipek <[email-masked]>
Signed-off-by: Jonathan Nieder <[email-masked]>
---
 guilt | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/guilt b/guilt
index d1e17d4..7f6806e 100755
--- a/guilt
+++ b/guilt
@@ -359,7 +359,7 @@ do_get_header()
 	# 4th line skips any empty lines thereafter.
 	# 5th line turns off empty line skip upon seeing a non-empty line.
 	# 6th line terminates execution when we encounter the diff
-	cat "$1" | awk '
+	awk '
 BEGIN{body=0; subj=0}
 /^Subject:/ && (body == 0 && subj == 0){subj=1; print substr($0, 10) "\n"; next}
 /^(Subject:|From:|Author:|Date:|commit)/ && (body == 0){next}
@@ -369,7 +369,7 @@ BEGIN{body=0; subj=0}
 /^(diff |---$|--- )/{exit}
 {print $0}
 END{}
-'
+' < "$1"
 }
 
 # usage: do_get_full_header patchfile
@@ -377,12 +377,12 @@ do_get_full_header()
 {
 	# 2nd line checks for the begining of a patch
 	# 3rd line outputs the line if it didn't get pruned by the above rules
-	cat "$1" | awk '
+	awk '
 BEGIN{}
 /^(diff |---$|--- )/{exit}
 {print $0}
 END{}
-'
+' < "$1"
 }
 
 # usage: assert_head_check
-- 
1.8.1