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diff --git a/bin/sleep/sleep.c b/bin/sleep/sleep.c
--- a/bin/sleep/sleep.c
+++ b/bin/sleep/sleep.c
@@ -59,31 +59,42 @@
parse_interval(const char *arg)
{
double num;
- char unit, extra;
-
- switch (sscanf(arg, "%lf%c%c", &num, &unit, &extra)) {
- case 2:
- switch (unit) {
- case 'd':
- num *= 24;
- /* FALLTHROUGH */
- case 'h':
- num *= 60;
- /* FALLTHROUGH */
- case 'm':
- num *= 60;
- /* FALLTHROUGH */
- case 's':
- if (!isnan(num))
- return (num);
- }
+ char *endptr;
+
+ errno = 0;
+ num = strtod(arg, &endptr);
+
+ /* No number found or overflow */
+ if (endptr == arg || errno != 0 || isnan(num)) {
+ warnx("invalid time interval: %s", arg);
+ return (INFINITY);
+ }
+
+ switch (*endptr) {
+ case '\0':
+ case 's':
+ break;
+ case 'm':
+ num *= 60;
break;
- case 1:
- if (!isnan(num))
- return (num);
+ case 'h':
+ num *= 60 * 60;
+ break;
+ case 'd':
+ num *= 24 * 60 * 60;
+ break;
+ default:
+ warnx("invalid time interval: %s", arg);
+ return (INFINITY);
}
- warnx("invalid time interval: %s", arg);
- return (INFINITY);
+
+ /* Reject trailing garbage like 10ms or 10sx */
+ if (*endptr != '\0' && endptr[1] != '\0') {
+ warnx("invalid time interval: %s", arg);
+ return (INFINITY);
+ }
+
+ return (num);
}
int
@@ -106,7 +117,7 @@
seconds = 0;
while (argc--)
seconds += parse_interval(*argv++);
- if (seconds > INT_MAX)
+ if (seconds < 0 || seconds > (double)INT_MAX)
usage();
if (seconds < 1e-9)
exit(0);
@@ -120,8 +131,9 @@
err(1, "nanosleep");
if (report_requested) {
/* Reporting does not bother with nanoseconds. */
- warnx("about %ld second(s) left out of the original %ld",
+ printf("about %ld second(s) left out of the original %ld\n",
(long)time_to_sleep.tv_sec, (long)original);
+ fflush(stdout);
report_requested = 0;
}
}

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