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- Submitted-by: gwc@root.co.uk (Geoff Clare)
-
- berg@physik.tu-muenchen.de (Stephen R. van den Berg) wrote:
-
- ] Could someone knowledgable please tell me if the following include files,
- ] the mentioned identifiers and the include files they are 'allocated' to are
- ] all conform the POSIX standard? (I dont't have any POSIX literature,
- ] so all the data I present here are educated guesses).
-
- I emailed my answer to Stephen like a good net.user, but now I see
- that an incorrect answer has been posted to the newsgroup, so I feel
- obliged to waste more bandwidth by correcting it.
-
- lewine@cheshirecat.webo.dg.com (Donald Lewine) writes:
-
- ]|>
- ] #include <unistd.h>
- ] ^^^^^^^^^^^^^^^^^^ unistd.h contains the prototypes for the
- ] functions you list and should be included in
- ] an ANSI C system.
-
- Except that open() is in <fcntl.h>, not <unistd.h>. Also the comments
- regarding prototypes and ANSI C are misleading. The original poster asked
- about "POSIX", he didn't specify "POSIX with ANSI C", so I assume he wants
- answers which apply equally well to POSIX with either common C or ANSI C.
-
- ]|> #include <stddef.h> /* EOF */
- ] NO. EOF is defined in <stdio.h>.
- ] <stddef.h> defines:
- ] NULL, offsetof, ptrdiff_t, size_t, wchar_t
-
- <stddef.h> is not required by POSIX.1.
-
- ]|> #include <stdlib.h> /* getenv() memmove() malloc() realloc()
- ]|> free() strtol() size_t */
- ] memmove() is in <string.h> all others are
- ] in <stdlib.h>
-
- memmove() and strtol() are not required by POSIX.1.
-
- ]|> #include <signal.h> /* signal() kill() */
-
- signal() is not required by POSIX.1.
-
- ]A complete listing of the POSIX headers is in Appendix A of the
- ]POSIX Programmer's Guide available for $34.95 from:
- (address deleted)
- ]In my not so humble opinion, the POSIX Programmer's Guide is
- ]required reading for anyone who wants to write programs that
- ]work on all POSIX systems.
-
- I hope it wasn't the source of the errors above.
-
- --
- Geoff Clare <gwc@root.co.uk> (Dumb American mailers: ...!uunet!root.co.uk!gwc)
- UniSoft Limited, London, England. Tel: +44 71 729 3773 Fax: +44 71 729 3273
-
-
- Volume-Number: Volume 24, Number 7
-
-