diff options
Diffstat (limited to 'libdaemon/dnonblock.c')
-rw-r--r-- | libdaemon/dnonblock.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/libdaemon/dnonblock.c b/libdaemon/dnonblock.c new file mode 100644 index 0000000..003514e --- /dev/null +++ b/libdaemon/dnonblock.c @@ -0,0 +1,49 @@ +/*** + This file is part of libdaemon. + + Copyright 2003-2008 Lennart Poettering + + Permission is hereby granted, free of charge, to any person obtaining a copy + of this software and associated documentation files (the "Software"), to deal + in the Software without restriction, including without limitation the rights + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + copies of the Software, and to permit persons to whom the Software is + furnished to do so, subject to the following conditions: + + The above copyright notice and this permission notice shall be included in + all copies or substantial portions of the Software. + + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + SOFTWARE. + +***/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <fcntl.h> + +#include "dnonblock.h" + +int daemon_nonblock(int fd, int b) { + int a, c; + + if ((a = fcntl(fd, F_GETFL)) < 0) + return -1; + + if (b) + c = a | O_NONBLOCK; + else + c = a & ~O_NONBLOCK; + + if (c == a) + return 0; + + return fcntl(fd, F_SETFL, c); +} |