ok@quintus.uucp (Richard A. O'Keefe) (11/27/88)
In article <6527@june.cs.washington.edu> ka@june.cs.washington.edu (Kenneth Almquist) writes: >It would certainly possible for AT&T to give each user his or her own >temporary directory and to modify the standard System V programs to use >this directory. See TEMPNAM(BA_LIB) in the SVID. char *tempnam(char *dir, char *prefix) If TMPDIR is defined in the user's environment and can be used, use that. If dir is non-NULL and names a usable directory, use that. If P_tmpdir (in <stdio.h>, usually /usr/tmp/) is usable, use that. Use /tmp only as a last resort. (Yes, that's right, $TMPDIR over-rides the dir argument.)
friedl@vsi.COM (Stephen J. Friedl) (11/30/88)
In article <755@quintus.UUCP>, ok@quintus.uucp (Richard A. O'Keefe) writes: > > See TEMPNAM(BA_LIB) in the SVID. > char *tempnam(char *dir, char *prefix) > If TMPDIR is defined in the user's environment and can be used, use that. > If dir is non-NULL and names a usable directory, use that. > If P_tmpdir (in <stdio.h>, usually /usr/tmp/) is usable, use that. > Use /tmp only as a last resort. > (Yes, that's right, $TMPDIR over-rides the dir argument.) An important note about tempnam(3): some (all?) implementations use access(2) to determine if the user has permission to use the temporary directory so mentioned. This can cause problems in a setuid/setgid environment where the effective uid/gid has permission to the dir but the real, underlying uid/gid does not. Another reason why you should require a license to use access(2). Steve -- Steve Friedl V-Systems, Inc. +1 714 545 6442 3B2-kind-of-guy friedl@vsi.com {backbones}!vsi.com!friedl attmail!vsi!friedl --------Nancy Reagan on access(2): "Just say NO F**KING WAY"------- :wq!