Mercurial > gnulib
view tests/test-select-fd.c @ 40190:ef116535bf1a
relocatable-prog: Use $ORIGIN trick on more platforms.
* m4/relocatable.m4 (gl_RELOCATABLE_BODY): Use $ORIGIN trick also on
FreeBSD >= 7.3, DragonFly >= 3.0, NetBSD >= 8.0, OpenBSD >= 5.4,
Solaris >= 10, Haiku. But don't use it on Android.
* build-aux/reloc-ldflags: Allow the use of the $ORIGIN trick also on
Hurd, FreeBSD, DragonFly, NetBSD, OpenBSD, Solaris, Haiku.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Wed, 20 Feb 2019 02:39:52 +0100 |
parents | b06060465f09 |
children |
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/* Test of select() substitute, reading or writing from a given file descriptor. Copyright (C) 2008-2019 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* Written by Bruno Haible <bruno@clisp.org>, 2008. */ #include <config.h> #include <stdio.h> #include <stdlib.h> #include <sys/select.h> int main (int argc, char *argv[]) { if (argc == 4) { char mode = argv[1][0]; if (mode == 'r' || mode == 'w') { int fd = atoi (argv[2]); if (fd >= 0) { const char *result_file_name = argv[3]; FILE *result_file = fopen (result_file_name, "wb"); if (result_file != NULL) { fd_set fds; struct timeval timeout; int ret; FD_ZERO (&fds); FD_SET (fd, &fds); timeout.tv_sec = 0; timeout.tv_usec = 10000; ret = (mode == 'r' ? select (fd + 1, &fds, NULL, NULL, &timeout) : select (fd + 1, NULL, &fds, NULL, &timeout)); if (ret < 0) { perror ("select failed"); exit (1); } if ((ret == 0) != ! FD_ISSET (fd, &fds)) { fprintf (stderr, "incorrect return value\n"); exit (1); } fprintf (result_file, "%d\n", ret); exit (0); } } } } fprintf (stderr, "Usage: test-select-fd mode fd result-file-name\n"); exit (1); }