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Date: | Fri, 13 Nov 2009 13:41:14 -0700 |
From: | Eric Blake <ebb9 AT byu DOT net> |
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To: | cygwin AT cygwin DOT com, sfandino AT yahoo DOT com |
Subject: | Re: [BUG] fopen(..., "a") does not seek to end of file until some write operation |
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 According to Salvador Fandino on 11/13/2009 1:36 PM: > Hii > > Using ftell() after fopen(..., "a") returns 0 even when the file open for appending is not empty. AFAIK, it should return the size of the file. Not a bug. POSIX allows this behavior, and Linux does it as well. POSIX also allows BSD behavior of seeking to the end, although this is less friendly to reading back a file opened with fopen(...,"a+"). So portable programs can't expect either situation, and you MUST use fseek when opening for append if you expect a particular position. - -- Don't work too hard, make some time for fun as well! Eric Blake ebb9 AT byu DOT net -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (Cygwin) Comment: Public key at home.comcast.net/~ericblake/eblake.gpg Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAkr9xGoACgkQ84KuGfSFAYC8CACgtx1ZxOtKVaGF2xk2UHg+1B7c 7cUAniO/T6EOm0gxRRx/1wsCM6P2HXXl =xedo -----END PGP SIGNATURE----- -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
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