Date: Thu, 30 Jan 2003 14:15:52 +0200 (EET) From: Adrian Penisoara <ady@freebsd.ady.ro> To: standards@freebsd.org Subject: strftime(): FreeBSD vs. Linux Message-ID: <Pine.BSF.4.10.10301301357001.46520-100000@ady.warpnet.ro>
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Hi,
Recently I had to "backport" a C program written under FreeBSD to
Linux and suprisingly I found that the strftime() function behaves
different in FreeBSD and Linux: while in FreeBSD strftime() would fill
the string buffer with whatever data was specified in the format string
up to the specified buffer length, in Linux strftime() would refuse to
place the last token specified in the format string if there was not
enough space to hold that token and a string terminator (\0).
E.g.:
#define LEN 12
char buffer[LEN+1];
time_t t=time(NULL);
strftime(buffer, LEN, "%b %d %R", localtime(&t));
buffer[LEN] = '\0';
printf("Result: [%s]\n", buffer);
This snippet would behave as expected in FreeBSD but not in Linux. In
Linux you would need to put LEN+1 as the second argument for strftime().
I find this to be quite disturbing and I wonder which OS steps on the
standards. What is the correct behavior ?
Thank you,
Ady (@freebsd.ady.ro)
____________________________________________________________________
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