This is the mail archive of the libc-hacker@sourceware.cygnus.com mailing list for the glibc project.
Note that libc-hacker is a closed list. You may look at the archives of this list, but subscription and posting are not open.
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |
>>>>> Ulrich Drepper writes: Uli> Andreas Jaeger <aj@arthur.rhein-neckar.de> writes: >> I've checked POSIX and my understanding of POSIX is that the check for >> NULL is necessary. Uli> POSIX says: Uli> If successful, the getpwuid_r() and getpwnam_r() functions shall Uli> return zero. Otherwise, an error number shall be returned to Uli> indicate the error. Uli> I.e., the return value is != 0 in all error cases and no found entry Uli> is an error case. Let's read it in context. Please note that I'm citing the draft from the Austin Group: The getpwnam_r() function updates the passwd structure pointed to by pwd and stores a pointer to that structure at the location pointed to by result. The structure contonas an entry from the user database with a matching name. Storage referenced by the structure is allocated from the memory provided with the buffer parameter, which is bufsize characters in size. The maximum size needed for this buffer can be determined with the {_SC_GETPW_R_SIZE_MAX} sysconf() paramter. A NULL pointer is returned at the location pointed to by result on error or if the requested entry is not found. For me the last sentence differentiates between errors and no entry found - which lead me to imply that no entry found is *not* an error and therefore the function should return 0. Andreas -- Andreas Jaeger aj@arthur.rhein-neckar.de jaeger@informatik.uni-kl.de for pgp-key finger ajaeger@aixd1.rhrk.uni-kl.de
Index Nav: | [Date Index] [Subject Index] [Author Index] [Thread Index] | |
---|---|---|
Message Nav: | [Date Prev] [Date Next] | [Thread Prev] [Thread Next] |