Date: Fri, 20 Jul 2001 04:50:01 -0700 (PDT) From: jkoshy@freebsd.org (Joseph Koshy) To: freebsd-doc@freebsd.org Subject: Re: docs/28699: strptime(3) %d format specifier not completely documented Message-ID: <200107201150.f6KBo1c88453@freefall.freebsd.org>
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The following reply was made to PR docs/28699; it has been noted by GNATS.
From: jkoshy@FreeBSD.ORG (Joseph Koshy)
To: freebsd-gnats-submit@freebsd.org
Cc:
Subject: Re: docs/28699: strptime(3) %d format specifier not completely documented
Date: Fri, 20 Jul 2001 04:41:34 -0700 (PDT)
I'm not sure that this isn't a bug.
`strftime(3)' states that '%d' generates 2 digits numbers in the range
01--31. Coming to `strptime(3)', looking at file
"src/lib/libc/stdtime/strptime.c":
...
case 'd':
case 'e':
/*
* The %e specifier is explicitly documented as not
* being zero-padded but there is no harm in allowing
* such padding.
*
* XXX The %e specifier may gobble one too many
* digits if used incorrectly.
*/
if (!isdigit((unsigned char)*buf))
return 0;
...
We see that '%d' will accept a single digit date ONLY if a preceding format
specifier had gobbled up whitespace before it. A format specification
with a leading '%d' will fail to recognize a single digit date.
We probably need to check that the input to %d is exactly 2 digits long.
Regards,
Koshy
<jkoshy@freebsd.org>
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