bin/sleep: add support for multiple delay values
The sleep time is calculated as the sum of all arguments passed. This makes the FreeBSD version of sleep functionally compatible with the version in GNU coreutils. MFC after: 1 week
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@ -32,7 +32,7 @@
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.\" @(#)sleep.1 8.3 (Berkeley) 4/18/94
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.\" @(#)sleep.1 8.3 (Berkeley) 4/18/94
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.\" $FreeBSD$
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.\" $FreeBSD$
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.\"
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.\"
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.Dd December 31, 2020
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.Dd May 24, 2022
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.Dt SLEEP 1
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.Dt SLEEP 1
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.Os
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.Os
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.Sh NAME
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.Sh NAME
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@ -40,21 +40,21 @@
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.Nd suspend execution for an interval of time
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.Nd suspend execution for an interval of time
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.Sh SYNOPSIS
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.Sh SYNOPSIS
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.Nm
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.Nm
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.Ar number[unit]
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.Ar number[unit] ...
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.Sh DESCRIPTION
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.Sh DESCRIPTION
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The
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The
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.Nm
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.Nm
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command
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command suspends execution for a minimum of
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suspends execution for a minimum of
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.Ar number
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.Ar number
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seconds (the default, or unit
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seconds (the default, or unit
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.Ar s ) ,
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.Ar s ) ,
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or minutes (unit
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minutes (unit
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.Ar m ) ,
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.Ar m ) ,
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hours (unit
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hours (unit
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.Ar h ) ,
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.Ar h ) ,
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or days (unit
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or days (unit
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.Ar d ) .
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.Ar d ) .
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If multiple arguments are passed, the delay will be the sum of all values.
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.Pp
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.Pp
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If the
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If the
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.Nm
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.Nm
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@ -72,9 +72,9 @@ The
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.Nm
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.Nm
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command allows and honors a non-integer number of seconds to sleep
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command allows and honors a non-integer number of seconds to sleep
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in any form acceptable by
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in any form acceptable by
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.Xr strtod 3 .
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.Xr strtod 3 and it accepts more than one delay value.
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This is a non-portable extension, but is also implemented in GNU sh-utils
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These are non-portable extensions, but they have also been implemented
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since version 2.0a (released in 2002).
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in GNU sh-utils since version 2.0a (released in 2002).
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.Sh EXIT STATUS
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.Sh EXIT STATUS
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.Ex -std
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.Ex -std
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.Sh EXAMPLES
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.Sh EXAMPLES
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@ -64,34 +64,48 @@ int
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main(int argc, char *argv[])
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main(int argc, char *argv[])
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{
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{
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struct timespec time_to_sleep;
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struct timespec time_to_sleep;
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double d;
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double d, seconds;
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time_t original;
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time_t original;
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char unit;
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char unit;
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char buf[2];
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char buf[2];
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int i, matches;
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if (caph_limit_stdio() < 0 || caph_enter() < 0)
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if (caph_limit_stdio() < 0 || caph_enter() < 0)
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err(1, "capsicum");
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err(1, "capsicum");
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if (argc != 2)
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if (argc < 2)
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usage();
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usage();
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if (sscanf(argv[1], "%lf%c%1s", &d, &unit, buf) == 2)
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seconds = 0;
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switch(unit) {
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for (i = 1; i < argc; i++) {
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case 'd': d *= 24;
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matches = sscanf(argv[i], "%lf%c%1s", &d, &unit, buf);
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case 'h': d *= 60;
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if (matches == 2)
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case 'm': d *= 60;
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switch(unit) {
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case 's': break;
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case 'd':
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default: usage();
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d *= 24;
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}
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/* FALLTHROUGH */
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else
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case 'h':
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if (sscanf(argv[1], "%lf%1s", &d, buf) != 1)
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d *= 60;
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usage();
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/* FALLTHROUGH */
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if (d > INT_MAX)
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case 'm':
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d *= 60;
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/* FALLTHROUGH */
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case 's':
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break;
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default:
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usage();
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}
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else
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if (matches != 1)
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usage();
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seconds += d;
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}
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if (seconds > INT_MAX)
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usage();
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usage();
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if (d <= 0)
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if (seconds <= 0)
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return (0);
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return (0);
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original = time_to_sleep.tv_sec = (time_t)d;
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original = time_to_sleep.tv_sec = (time_t)seconds;
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time_to_sleep.tv_nsec = 1e9 * (d - time_to_sleep.tv_sec);
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time_to_sleep.tv_nsec = 1e9 * (seconds - time_to_sleep.tv_sec);
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signal(SIGINFO, report_request);
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signal(SIGINFO, report_request);
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@ -116,7 +130,7 @@ static void
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usage(void)
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usage(void)
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{
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{
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fprintf(stderr, "usage: sleep number[unit]\n");
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fprintf(stderr, "usage: sleep number[unit] ...\n");
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fprintf(stderr, "Unit can be 's' (seconds, the default), "
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fprintf(stderr, "Unit can be 's' (seconds, the default), "
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"m (minutes), h (hours), or d (days).\n");
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"m (minutes), h (hours), or d (days).\n");
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exit(1);
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exit(1);
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