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tools::md5sum gives a warning if it receives a directory as an argument on Unix but not on Windows. >From what I understand, this happens because in Windows a directory is not treated as a file so fopen returns NULL. Then, NA is returned without a warning. On Unix, a directory is treated as a file so fopen does not return NULL so md5 is run and fails, leading to a warning. This is a good

...ing to see how it handles NAs) ? If this is the case, would a patch for ?file.access be considered? Below is a patch that changes the return of an NA to NA. Index: trunk/src/main/platform.c =================================================================== --- trunk/src/main/platform.c (revision 64011) +++ trunk/src/main/platform.c (working copy) @@ -1299,7 +1299,7 @@ access(R_ExpandFileName(translateChar(STRING_ELT(fn, i))), modemask); #endif - } else INTEGER(ans)[i] = FALSE; + } else INTEGER(ans)[i] = NA_INTEGER; UNPROTECT(1); return ans; } Comments? Scott > session...

.../10 remote 0/20 new msg 155041 info msg 155041: bytes 263 from <caretaker at localhost.> qp 4560 uid 1000 starting delivery 1: msg 155041 to remote akkersson at localhost. status: local 0/10 remote 1/20 new msg 155147 info msg 155147: bytes 438 from <caretaker at localhost.> qp 4563 uid 64011 starting delivery 2: msg 155147 to local akkersson at localhost status: local 1/10 remote 1/20 delivery 1: success: 127.0.0.1_accepted_message./Remote_host_said:_250_ok_1241272738_qp_4563/ status: local 1/10 remote 0/20 end msg 155041 delivery 2: deferral: status: local 0/10 remote 0/20 cat /var/l...