octave-shane/gnulib-hg: m4/isapipe.m4 annotate

annotate m4/isapipe.m4 @ 17480:f40b3156a43e

selinux-at: omit unnecessary include * lib/selinux-at.c: Don't include dosname.h; not needed, since this source file doesn't use its macros, and subsidiary files that use the macros already include it.

author	Paul Eggert <eggert@cs.ucla.edu>
date	Fri, 23 Aug 2013 13:53:46 -0700
parents	e542fd46ad6f
children	344018b6e5d7

rev	line source
7233 ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	1 # Test whether a file descriptor is a pipe.
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	2
17249 e542fd46ad6f maint: update all copyright year number ranges Eric Blake <eblake@redhat.com> parents: 16201 diff changeset	3 dnl Copyright (C) 2006, 2009-2013 Free Software Foundation, Inc.
7233 ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	4
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	5 dnl This file is free software; the Free Software Foundation
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	6 dnl gives unlimited permission to copy and/or distribute it,
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	7 dnl with or without modifications, as long as this notice is preserved.
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	8
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	9 dnl Written by Paul Eggert.
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	10
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	11 AC_DEFUN([gl_ISAPIPE],
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	12 [
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	13 # OpenVMS has isapipe already, so check for it.
14988 cc7009b139e3 isapipe: Move AC_LIBOBJ invocations to module description. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	14 AC_CHECK_FUNCS([isapipe])
cc7009b139e3 isapipe: Move AC_LIBOBJ invocations to module description. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	15 if test $ac_cv_func_isapipe = yes; then
cc7009b139e3 isapipe: Move AC_LIBOBJ invocations to module description. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	16 HAVE_ISAPIPE=1
cc7009b139e3 isapipe: Move AC_LIBOBJ invocations to module description. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	17 else
cc7009b139e3 isapipe: Move AC_LIBOBJ invocations to module description. Bruno Haible <bruno@clisp.org> parents: 14079 diff changeset	18 HAVE_ISAPIPE=0
7233 ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	19 fi
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	20 ])
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	21
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	22 # Prerequisites of lib/isapipe.c.
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	23 AC_DEFUN([gl_PREREQ_ISAPIPE],
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	24 [
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	25 AC_CACHE_CHECK([whether pipes are FIFOs (and for their link count)],
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	26 [gl_cv_pipes_are_fifos],
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	27 [AC_RUN_IFELSE(
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	28 [AC_LANG_SOURCE(
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	29 [[#include <stdio.h>
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	30 #include <sys/types.h>
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	31 #include <sys/stat.h>
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	32 #include <unistd.h>
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	33 #ifndef S_ISFIFO
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	34 #define S_ISFIFO(m) 0
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	35 #endif
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	36 #ifndef S_ISSOCK
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	37 #define S_ISSOCK(m) 0
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	38 #endif
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	39 int
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	40 main (int argc, char **argv)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	41 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	42 int fd[2];
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	43 struct stat st;
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	44 if (pipe (fd) != 0)
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	45 return 1;
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	46 if (fstat (fd[0], &st) != 0)
d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	47 return 2;
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	48 if (2 <= argc && argv[1][0] == '-')
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	49 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	50 char const *yesno = (S_ISFIFO (st.st_mode) ? "yes" : "no");
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	51 if (st.st_nlink <= 1)
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	52 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	53 long int i = st.st_nlink;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	54 if (i != st.st_nlink)
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	55 return 3;
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	56 printf ("%s (%ld)\n", yesno, i);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	57 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	58 else
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	59 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	60 unsigned long int i = st.st_nlink;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	61 if (i != st.st_nlink)
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	62 return 4;
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	63 printf ("%s (%lu)\n", yesno, i);
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	64 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	65 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	66 else
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	67 {
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	68 if (! S_ISFIFO (st.st_mode) && ! S_ISSOCK (st.st_mode))
13918 d5a74c6ec06b Put more information about failed tests into the test return codes. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	69 return 5;
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	70 }
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	71 return 0;
e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	72 }]])],
7233 ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	73 [gl_cv_pipes_are_fifos=`./conftest$ac_exeext -`
12421 e8d2c6fc33ad Use spaces for indentation, not tabs. Bruno Haible <bruno@clisp.org> parents: 11007 diff changeset	74 test -z "$gl_cv_pipes_are_fifos" && gl_cv_pipes_are_fifos=no],
7233 ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	75 [gl_cv_pipes_are_fifos=unknown],
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	76 [gl_cv_pipes_are_fifos=cross-compiling])])
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	77
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	78 case $gl_cv_pipes_are_fifos in #(
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	79 'yes ('*')')
11007 f6cba5a556ce many .m4 files: improve m4 quoting Jim Meyering <meyering@redhat.com>* parents: 7233 diff changeset	80 AC_DEFINE([HAVE_FIFO_PIPES], [1],
7233 ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	81 [Define to 1 if pipes are FIFOs, 0 if sockets. Leave undefined
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	82 if not known.]);; #(
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	83 'no ('*')')
11007 f6cba5a556ce many .m4 files: improve m4 quoting Jim Meyering <meyering@redhat.com>* parents: 7233 diff changeset	84 AC_DEFINE([HAVE_FIFO_PIPES], [0]);;
7233 ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	85 esac
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	86
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	87 case $gl_cv_pipes_are_fifos in #(
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	88 '('')')
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	89 AC_DEFINE_UNQUOTED([PIPE_LINK_COUNT_MAX],
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	90 [`expr "$gl_cv_pipes_are_fifos" : '.$(.)$'`],
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	91 [Define to the maximum link count that a true pipe can have.]);;
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	92 esac
ec85aace506a * modules/isapipe: New file. Paul Eggert <eggert@cs.ucla.edu> parents: diff changeset	93 ])

Mercurial > hg > octave-shane > gnulib-hg

annotate m4/isapipe.m4 @ 17480:f40b3156a43e