Date: Mon, 5 Mar 2012 11:45:20 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r232543 - stable/9/contrib/top Message-ID: <201203051145.q25BjKP2085075@svn.freebsd.org>
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Author: kib Date: Mon Mar 5 11:45:19 2012 New Revision: 232543 URL: http://svn.freebsd.org/changeset/base/232543 Log: MFC r232239: Fix a race in top non-interactive mode. Use plain sleep(3) call instead of arming timer and then pausing. If SIGALRM is delivered before pause(3) is entered, top hangs. Modified: stable/9/contrib/top/top.c Directory Properties: stable/9/contrib/top/ (props changed) Modified: stable/9/contrib/top/top.c ============================================================================== --- stable/9/contrib/top/top.c Mon Mar 5 11:43:27 2012 (r232542) +++ stable/9/contrib/top/top.c Mon Mar 5 11:45:19 2012 (r232543) @@ -70,7 +70,6 @@ int pcpu_stats = No; /* signal handling routines */ sigret_t leave(); -sigret_t onalrm(); sigret_t tstop(); #ifdef SIGWINCH sigret_t winch(); @@ -723,12 +722,7 @@ restart: no_command = Yes; if (!interactive) { - /* set up alarm */ - (void) signal(SIGALRM, onalrm); - (void) alarm((unsigned)delay); - - /* wait for the rest of it .... */ - pause(); + sleep(delay); } else while (no_command) { @@ -1174,11 +1168,3 @@ int status; exit(status); /*NOTREACHED*/ } - -sigret_t onalrm() /* SIGALRM handler */ - -{ - /* this is only used in batch mode to break out of the pause() */ - /* return; */ -} -
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