From: Denys Vlasenko <vda.linux@googlemail.com>
Date: Tue, 24 Jan 2012 10:31:51 +0000 (+0100)
Subject: Allocate -o OUTFILE buffer only if needed
X-Git-Tag: v4.7~200
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=a677da5e3f25107d4402c1c917d019f2d0bc9f29;p=strace

Allocate -o OUTFILE buffer only if needed

   text	   data	    bss	    dec	    hex	filename
 238258	    668	  28676	 267602	  41552	strace.before
 238274	    668	  20484	 259426	  3f562	strace

* strace.c (main): Allocate -o OUTFILE buffer only if needed:
unused buffer in bss is not entirely free.

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
---

diff --git a/strace.c b/strace.c
index 64e90e71..0da9afb0 100644
--- a/strace.c
+++ b/strace.c
@@ -1182,7 +1182,9 @@ main(int argc, char *argv[])
 	}
 
 	if (!outfname || outfname[0] == '|' || outfname[0] == '!') {
-		static char buf[BUFSIZ];
+		char *buf = malloc(BUFSIZ);
+		if (!buf)
+			die_out_of_memory();
 		setvbuf(outf, buf, _IOLBF, BUFSIZ);
 	}
 	if (outfname && optind < argc) {