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Make top exit if its tty vanishes.

Browse Source 
PR:		30939, 30581
Submitted by:	Edwin Groothuis <edwin@mavetju.org>
Submitted by: 	Andrew L. Neporada <andr@dgap.mipt.ru>
MFC after:	2 weeks
This commit is contained in:
David Malone 2001-11-04 21:15:52 +00:00
parent a2866b2ef9
commit 3d08935d6a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=86042
1 changed files with 8 additions and 2 deletions
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10
contrib/top/top.c
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@ -32,6 +32,7 @@ char *copyright =
*/
#include "os.h"
#include <errno.h>
#include <signal.h>
#include <setjmp.h>
#include <ctype.h>
@ -157,6 +158,7 @@ char *argv[];
int topn = Default_TOPN;
int delay = Default_DELAY;
int displays = 0; /* indicates unspecified */
int sel_ret = 0;
time_t curr_time;
char *(*get_userid)() = username;
char *uname_field = "USERNAME";
@ -711,7 +713,10 @@ Usage: %s [-ISbinqut] [-d x] [-s x] [-o field] [-U username] [number]\n",
}
/* wait for either input or the end of the delay period */
if (select(32, &readfds, (fd_set *)NULL, (fd_set *)NULL, &timeout) > 0)
sel_ret = select(2, &readfds, NULL, NULL, &timeout);
if (sel_ret < 0 && errno != EINTR)
quit(0);
if (sel_ret > 0)
{
int newval;
char *errmsg;
@ -721,7 +726,8 @@ Usage: %s [-ISbinqut] [-d x] [-s x] [-o field] [-U username] [number]\n",
/* now read it and convert to command strchr */
/* (use "change" as a temporary to hold strchr) */
(void) read(0, &ch, 1);
if (read(0, &ch, 1) != 1)
quit(0);
if ((iptr = strchr(command_chars, ch)) == NULL)
{
if (ch != '\r' && ch != '\n')