On Mon, Jun 04, 2012 at 09:34:49PM +0000, Andrey A. Chernov wrote: > 1) IEEE Std 1003.1-2008, "errno" section, is explicit that > > "The setting of errno after a successful call to a function is > unspecified unless the description of that function specifies that > errno shall not be modified." > > However, free() in IEEE Std 1003.1-2008 does not mention its interaction > with errno, so MAY modify it after successful call > (it depends on particular free() implementation, OS-specific, etc.).
I see this subject brings some attention, so I prefer to exmpain details. Here is the quote from the future standard change: http://austingroupbugs.net/view.php?id=385 "However, earlier versions of this standard did not require this, and the same example had to be written as: // buf was obtained by malloc(buflen) ret = write(fd, buf, buflen); if (ret < 0) { int save = errno; free(buf); errno = save; return ret; } " All we have now is "earlier version of standard". Until they'll publish future version, we need to stay this recommendation. -- http://ache.vniz.net/ _______________________________________________ svn-src-head@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
