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Date: | Fri, 20 Mar 2009 18:45:12 +0000 |
From: | Dave Korn <dave DOT korn DOT cygwin AT googlemail DOT com> |
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To: | cygwin AT cygwin DOT com |
Subject: | Re: UNLINK problem (again!!) |
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Martine Carannante wrote: > $ ./testop > Create file > unlink file > Create Again the file > Error Create: : Permission denied > printf("Create file\n"); > if((fp=fopen("toto","a+"))==NULL) { > perror("Error Create: "); > exit(255); > } > printf("unlink file\n"); > ret=unlink("toto"); > if (ret != 0) { > perror("Error Unlink: "); > exit(255); > } > printf("Create Again the file\n"); > if((fp=fopen("toto","a+"))==NULL) { You didn't close the first filehandle. This is Cygwin correctly implementing the POSIX "can delete a file while retaining a handle to its contents" semantic, followed by the known Cygwin problem (a restiction of the underlying windows OS) that you can't (as you can in POSIX) create a new file in place of the old one while you keep that handle to the old one's contents. If you add an "fclose (fp)" before the unlink, or after the unlink but before the second attempt to open, it works. cheers, DaveK -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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