Update watch(1) to handle more accurate intervals - ubase - suckless linux base utils
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---
(DIR) commit 703e18185c38b869d8f001241aa6b33c832ff5dc
(DIR) parent 4cb108f557d6c34f22166430f853e64335e94461
(HTM) Author: sin <sin@2f30.org>
Date: Sun, 30 Nov 2014 14:03:25 +0000
Update watch(1) to handle more accurate intervals
Diffstat:
M watch.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
---
(DIR) diff --git a/watch.c b/watch.c
@@ -1,4 +1,5 @@
/* See LICENSE file for copyright and license details. */
+#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
@@ -15,14 +16,19 @@ int
main(int argc, char *argv[])
{
char cmd[BUFSIZ];
- int i, interval = 2;
+ char *end;
+ useconds_t interval = 2 * 1E6;
+ float period;
+ int i;
ARGBEGIN {
case 't':
break;
case 'n':
- /* Only whole seconds for now */
- interval = estrtol(EARGF(usage()), 10);
+ period = strtof(EARGF(usage()), &end);
+ if (*end != '\0' || errno != 0)
+ eprintf("invalid interval\n");
+ interval = period * 1E6;
break;
default:
usage();
@@ -44,7 +50,7 @@ main(int argc, char *argv[])
printf("\x1b[2J\x1b[H"); /* clear */
fflush(NULL);
system(cmd);
- sleep(interval);
+ usleep(interval);
}
return 0;
}