Jonathan Nieder [off-list ref] writes:
+static unsigned long ulong_arg(const char *option, const char *arg)
+{
+ char *endptr;
+ unsigned long rv = strtoul(arg, &endptr, 0);
+ if (strchr(arg, '-') || endptr == arg || *endptr)
+ die("%s: argument must be an unsigned integer", option);
Micronit.
It probably is Ok for the target audience, but it might be more proper to
call it "non-negative integer" ("unsigned integer" is a container to hold
such quantity).