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Index: sbin/shutdown/shutdown.8
===================================================================
--- sbin/shutdown/shutdown.8
+++ sbin/shutdown/shutdown.8
@@ -118,6 +118,15 @@
The first form brings the system down in
.Ar number
minutes and the second at the absolute time specified.
+.Ar +number
+may be specified in units other than minutes by appending corresponding
+suffix:
+.Dq Li s ,
+.Dq Li sec ,
+.Dq Li m ,
+.Dq Li min .
+.Dq Li h ,
+.Dq Li hour .
.It Ar warning-message
Any other arguments comprise the warning message that is broadcast
to users currently logged into the system.
Index: sbin/shutdown/shutdown.c
===================================================================
--- sbin/shutdown/shutdown.c
+++ sbin/shutdown/shutdown.c
@@ -48,6 +48,7 @@
#include <ctype.h>
#include <err.h>
+#include <errno.h>
#include <fcntl.h>
#include <paths.h>
#include <pwd.h>
@@ -322,7 +323,8 @@
(void)fprintf(pf, "System going down in %d minute%s\n\n",
timeleft / 60, (timeleft > 60) ? "s" : "");
else if (timeleft)
- (void)fprintf(pf, "System going down in 30 seconds\n\n");
+ (void)fprintf(pf, "System going down in %s30 seconds\n\n",
+ (offset > 0 && offset < 30 ? "less than " : ""));
else
(void)fprintf(pf, "System going down IMMEDIATELY\n\n");
@@ -415,6 +417,7 @@
char *p;
time_t now;
int this_year;
+ char *timeunit;
(void)time(&now);
@@ -427,8 +430,25 @@
if (*timearg == '+') { /* +minutes */
if (!isdigit(*++timearg))
badtime();
- if ((offset = atoi(timearg) * 60) < 0)
+ errno = 0;
+ offset = strtol(timearg, &timeunit, 10);
+ if (offset < 0 || offset == LONG_MAX || errno != 0)
badtime();
+ if (timeunit[0] == '\0' || strcasecmp(timeunit, "m") == 0 ||
+ strcasecmp(timeunit, "min") == 0 ||
+ strcasecmp(timeunit, "mins") == 0) {
+ offset *= 60;
+ } else if (strcasecmp(timeunit, "h") == 0 ||
+ strcasecmp(timeunit, "hour") == 0 ||
+ strcasecmp(timeunit, "hours") == 0) {
+ offset *= 60 * 60;
+ } else if (strcasecmp(timeunit, "s") == 0 ||
+ strcasecmp(timeunit, "sec") == 0 ||
+ strcasecmp(timeunit, "secs") == 0) {
+ offset *= 1;
+ } else {
+ badtime();
+ }
shuttime = now + offset;
return;
}

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