[hackers] [sbase] tee: -i option ignores SIGINT || Greg Reagle

From: <git_AT_suckless.org>
Date: Thu, 22 Jan 2015 22:36:14 +0100 (CET)

commit 4a1fed992387956c93dfdbf0726b0033903b3e7b
Author: Greg Reagle <greg.reagle_AT_umbc.edu>
Date: Thu Jan 22 16:08:25 2015 -0500

    tee: -i option ignores SIGINT

diff --git a/tee.1 b/tee.1
index 36a1570..297a292 100644
--- a/tee.1
+++ b/tee.1
_AT_@ -3,7 +3,7 @@
 tee \- duplicate stdin
 .SH SYNOPSIS
 .B tee
-.RB [ \-a ]
+.RB [ \-ai ]
 .RI [ file ...]
 .SH DESCRIPTION
 .B tee
_AT_@ -12,3 +12,6 @@ writes from stdin to stdout, making copies in each file.
 .TP
 .B \-a
 append to each file rather than overwriting.
+.TP
+.B \-i
+ignore SIGINT, i.e. the interrupt from keyboard signal
diff --git a/tee.c b/tee.c
index 97307e1..0b4ad8b 100644
--- a/tee.c
+++ b/tee.c
_AT_@ -1,4 +1,5 @@
 /* See LICENSE file for copyright and license details. */
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
_AT_@ -8,13 +9,13 @@
 static void
 usage(void)
 {
- eprintf("usage: %s [-a] [file...]\n", argv0);
+ eprintf("usage: %s [-ai] [file...]\n", argv0);
 }
 
 int
 main(int argc, char *argv[])
 {
- int aflag = 0;
+ int aflag = 0, iflag = 0;
         char buf[BUFSIZ];
         int i, nfps;
         size_t n;
_AT_@ -24,10 +25,15 @@ main(int argc, char *argv[])
         case 'a':
                 aflag = 1;
                 break;
+ case 'i':
+ iflag = 1;
+ break;
         default:
                 usage();
         } ARGEND;
 
+ if (iflag && signal(SIGINT, SIG_IGN) == SIG_ERR)
+ eprintf("signal:");
         nfps = argc + 1;
         fps = ecalloc(nfps, sizeof *fps);
 
Received on Thu Jan 22 2015 - 22:36:14 CET