implement "socket activation": passing IPC sockets to i3
This commit is contained in:
Michael Stapelberg
parent
6b1dce27f7
commit
10f871b57b
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@ -0,0 +1,265 @@
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#ifndef foosddaemonhfoo
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#define foosddaemonhfoo
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/***
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Copyright 2010 Lennart Poettering
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Permission is hereby granted, free of charge, to any person
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obtaining a copy of this software and associated documentation files
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(the "Software"), to deal in the Software without restriction,
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including without limitation the rights to use, copy, modify, merge,
|
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publish, distribute, sublicense, and/or sell copies of the Software,
|
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and to permit persons to whom the Software is furnished to do so,
|
||||
subject to the following conditions:
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||||
|
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The above copyright notice and this permission notice shall be
|
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included in all copies or substantial portions of the Software.
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||||
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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***/
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#include <sys/types.h>
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#include <inttypes.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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Reference implementation of a few systemd related interfaces for
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writing daemons. These interfaces are trivial to implement. To
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simplify porting we provide this reference implementation.
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Applications are welcome to reimplement the algorithms described
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here if they do not want to include these two source files.
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The following functionality is provided:
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- Support for logging with log levels on stderr
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- File descriptor passing for socket-based activation
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- Daemon startup and status notification
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- Detection of systemd boots
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You may compile this with -DDISABLE_SYSTEMD to disable systemd
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support. This makes all those calls NOPs that are directly related to
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systemd (i.e. only sd_is_xxx() will stay useful).
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Since this is drop-in code we don't want any of our symbols to be
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exported in any case. Hence we declare hidden visibility for all of
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them.
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You may find an up-to-date version of these source files online:
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http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.h
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http://cgit.freedesktop.org/systemd/plain/src/sd-daemon.c
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This should compile on non-Linux systems, too, but with the
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exception of the sd_is_xxx() calls all functions will become NOPs.
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See sd-daemon(7) for more information.
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*/
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#ifndef _sd_printf_attr_
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#if __GNUC__ >= 4
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#define _sd_printf_attr_(a,b) __attribute__ ((format (printf, a, b)))
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#else
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#define _sd_printf_attr_(a,b)
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#endif
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#endif
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#ifndef _sd_hidden_
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#if (__GNUC__ >= 4) && !defined(SD_EXPORT_SYMBOLS)
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#define _sd_hidden_ __attribute__ ((visibility("hidden")))
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#else
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#define _sd_hidden_
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#endif
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#endif
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/*
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Log levels for usage on stderr:
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fprintf(stderr, SD_NOTICE "Hello World!\n");
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This is similar to printk() usage in the kernel.
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*/
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#define SD_EMERG "<0>" /* system is unusable */
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#define SD_ALERT "<1>" /* action must be taken immediately */
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#define SD_CRIT "<2>" /* critical conditions */
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#define SD_ERR "<3>" /* error conditions */
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#define SD_WARNING "<4>" /* warning conditions */
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#define SD_NOTICE "<5>" /* normal but significant condition */
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#define SD_INFO "<6>" /* informational */
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#define SD_DEBUG "<7>" /* debug-level messages */
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/* The first passed file descriptor is fd 3 */
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#define SD_LISTEN_FDS_START 3
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/*
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Returns how many file descriptors have been passed, or a negative
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errno code on failure. Optionally, removes the $LISTEN_FDS and
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$LISTEN_PID file descriptors from the environment (recommended, but
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problematic in threaded environments). If r is the return value of
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this function you'll find the file descriptors passed as fds
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SD_LISTEN_FDS_START to SD_LISTEN_FDS_START+r-1. Returns a negative
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errno style error code on failure. This function call ensures that
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the FD_CLOEXEC flag is set for the passed file descriptors, to make
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sure they are not passed on to child processes. If FD_CLOEXEC shall
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not be set, the caller needs to unset it after this call for all file
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descriptors that are used.
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See sd_listen_fds(3) for more information.
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*/
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int sd_listen_fds(int unset_environment) _sd_hidden_;
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/*
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Helper call for identifying a passed file descriptor. Returns 1 if
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the file descriptor is a FIFO in the file system stored under the
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specified path, 0 otherwise. If path is NULL a path name check will
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not be done and the call only verifies if the file descriptor
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refers to a FIFO. Returns a negative errno style error code on
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failure.
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See sd_is_fifo(3) for more information.
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*/
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int sd_is_fifo(int fd, const char *path) _sd_hidden_;
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/*
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Helper call for identifying a passed file descriptor. Returns 1 if
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the file descriptor is a socket of the specified family (AF_INET,
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...) and type (SOCK_DGRAM, SOCK_STREAM, ...), 0 otherwise. If
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family is 0 a socket family check will not be done. If type is 0 a
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socket type check will not be done and the call only verifies if
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the file descriptor refers to a socket. If listening is > 0 it is
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verified that the socket is in listening mode. (i.e. listen() has
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been called) If listening is == 0 it is verified that the socket is
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not in listening mode. If listening is < 0 no listening mode check
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is done. Returns a negative errno style error code on failure.
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See sd_is_socket(3) for more information.
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*/
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int sd_is_socket(int fd, int family, int type, int listening) _sd_hidden_;
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/*
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Helper call for identifying a passed file descriptor. Returns 1 if
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the file descriptor is an Internet socket, of the specified family
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(either AF_INET or AF_INET6) and the specified type (SOCK_DGRAM,
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SOCK_STREAM, ...), 0 otherwise. If version is 0 a protocol version
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check is not done. If type is 0 a socket type check will not be
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done. If port is 0 a socket port check will not be done. The
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listening flag is used the same way as in sd_is_socket(). Returns a
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negative errno style error code on failure.
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See sd_is_socket_inet(3) for more information.
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*/
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int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) _sd_hidden_;
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/*
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Helper call for identifying a passed file descriptor. Returns 1 if
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the file descriptor is an AF_UNIX socket of the specified type
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(SOCK_DGRAM, SOCK_STREAM, ...) and path, 0 otherwise. If type is 0
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a socket type check will not be done. If path is NULL a socket path
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check will not be done. For normal AF_UNIX sockets set length to
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0. For abstract namespace sockets set length to the length of the
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socket name (including the initial 0 byte), and pass the full
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socket path in path (including the initial 0 byte). The listening
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flag is used the same way as in sd_is_socket(). Returns a negative
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errno style error code on failure.
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See sd_is_socket_unix(3) for more information.
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*/
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int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) _sd_hidden_;
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/*
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Informs systemd about changed daemon state. This takes a number of
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newline separated environment-style variable assignments in a
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string. The following variables are known:
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READY=1 Tells systemd that daemon startup is finished (only
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relevant for services of Type=notify). The passed
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argument is a boolean "1" or "0". Since there is
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little value in signaling non-readiness the only
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value daemons should send is "READY=1".
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STATUS=... Passes a single-line status string back to systemd
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that describes the daemon state. This is free-from
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and can be used for various purposes: general state
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feedback, fsck-like programs could pass completion
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percentages and failing programs could pass a human
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readable error message. Example: "STATUS=Completed
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66% of file system check..."
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ERRNO=... If a daemon fails, the errno-style error code,
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formatted as string. Example: "ERRNO=2" for ENOENT.
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BUSERROR=... If a daemon fails, the D-Bus error-style error
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code. Example: "BUSERROR=org.freedesktop.DBus.Error.TimedOut"
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MAINPID=... The main pid of a daemon, in case systemd did not
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fork off the process itself. Example: "MAINPID=4711"
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Daemons can choose to send additional variables. However, it is
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recommended to prefix variable names not listed above with X_.
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Returns a negative errno-style error code on failure. Returns > 0
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if systemd could be notified, 0 if it couldn't possibly because
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systemd is not running.
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Example: When a daemon finished starting up, it could issue this
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call to notify systemd about it:
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sd_notify(0, "READY=1");
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See sd_notifyf() for more complete examples.
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See sd_notify(3) for more information.
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*/
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int sd_notify(int unset_environment, const char *state) _sd_hidden_;
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/*
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Similar to sd_notify() but takes a format string.
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Example 1: A daemon could send the following after initialization:
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sd_notifyf(0, "READY=1\n"
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"STATUS=Processing requests...\n"
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"MAINPID=%lu",
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(unsigned long) getpid());
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Example 2: A daemon could send the following shortly before
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exiting, on failure:
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sd_notifyf(0, "STATUS=Failed to start up: %s\n"
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"ERRNO=%i",
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strerror(errno),
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errno);
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See sd_notifyf(3) for more information.
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*/
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int sd_notifyf(int unset_environment, const char *format, ...) _sd_printf_attr_(2,3) _sd_hidden_;
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/*
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Returns > 0 if the system was booted with systemd. Returns < 0 on
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error. Returns 0 if the system was not booted with systemd. Note
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that all of the functions above handle non-systemd boots just
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fine. You should NOT protect them with a call to this function. Also
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note that this function checks whether the system, not the user
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session is controlled by systemd. However the functions above work
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for both user and system services.
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See sd_booted(3) for more information.
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*/
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int sd_booted(void) _sd_hidden_;
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#ifdef __cplusplus
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}
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#endif
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#endif
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@ -678,7 +678,7 @@ void ipc_new_client(EV_P_ struct ev_io *w, int revents) {
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ev_io_init(package, ipc_receive_message, client, EV_READ);
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ev_io_start(EV_A_ package);
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DLOG("IPC: new client connected\n");
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DLOG("IPC: new client connected on fd %d\n", w->fd);
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ipc_client *new = scalloc(sizeof(ipc_client));
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new->fd = client;
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17
src/main.c
17
src/main.c
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@ -5,6 +5,8 @@
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#include <fcntl.h>
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#include "all.h"
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#include "sd-daemon.h"
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static int xkb_event_base;
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int xkb_current_group;
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@ -441,6 +443,21 @@ int main(int argc, char *argv[]) {
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ev_io_start(main_loop, ipc_io);
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}
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/* Also handle the UNIX domain sockets passed via socket activation */
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int fds = sd_listen_fds(1);
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if (fds < 0)
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ELOG("socket activation: Error in sd_listen_fds\n");
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else if (fds == 0)
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DLOG("socket activation: no sockets passed\n");
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else {
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for (int fd = SD_LISTEN_FDS_START; fd < (SD_LISTEN_FDS_START + fds); fd++) {
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DLOG("socket activation: also listening on fd %d\n", fd);
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struct ev_io *ipc_io = scalloc(sizeof(struct ev_io));
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ev_io_init(ipc_io, ipc_new_client, fd, EV_READ);
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ev_io_start(main_loop, ipc_io);
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}
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}
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/* Set up i3 specific atoms like I3_SOCKET_PATH and I3_CONFIG_PATH */
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x_set_i3_atoms();
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@ -0,0 +1,436 @@
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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Copyright 2010 Lennart Poettering
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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.
|
||||
***/
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <sys/fcntl.h>
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#include <netinet/in.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stddef.h>
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#include "sd-daemon.h"
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int sd_listen_fds(int unset_environment) {
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#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
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return 0;
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#else
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int r, fd;
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const char *e;
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char *p = NULL;
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unsigned long l;
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if (!(e = getenv("LISTEN_PID"))) {
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r = 0;
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goto finish;
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}
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errno = 0;
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l = strtoul(e, &p, 10);
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if (errno != 0) {
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r = -errno;
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goto finish;
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}
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if (!p || *p || l <= 0) {
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r = -EINVAL;
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goto finish;
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}
|
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/* Is this for us? */
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if (getpid() != (pid_t) l) {
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r = 0;
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goto finish;
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}
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if (!(e = getenv("LISTEN_FDS"))) {
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r = 0;
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goto finish;
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}
|
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errno = 0;
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l = strtoul(e, &p, 10);
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|
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if (errno != 0) {
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r = -errno;
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goto finish;
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}
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||||
|
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if (!p || *p) {
|
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r = -EINVAL;
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goto finish;
|
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}
|
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|
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for (fd = SD_LISTEN_FDS_START; fd < SD_LISTEN_FDS_START + (int) l; fd ++) {
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int flags;
|
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|
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if ((flags = fcntl(fd, F_GETFD)) < 0) {
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (flags & FD_CLOEXEC)
|
||||
continue;
|
||||
|
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if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0) {
|
||||
r = -errno;
|
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goto finish;
|
||||
}
|
||||
}
|
||||
|
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r = (int) l;
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||||
|
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finish:
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if (unset_environment) {
|
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unsetenv("LISTEN_PID");
|
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unsetenv("LISTEN_FDS");
|
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}
|
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|
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return r;
|
||||
#endif
|
||||
}
|
||||
|
||||
int sd_is_fifo(int fd, const char *path) {
|
||||
struct stat st_fd;
|
||||
|
||||
if (fd < 0)
|
||||
return -EINVAL;
|
||||
|
||||
memset(&st_fd, 0, sizeof(st_fd));
|
||||
if (fstat(fd, &st_fd) < 0)
|
||||
return -errno;
|
||||
|
||||
if (!S_ISFIFO(st_fd.st_mode))
|
||||
return 0;
|
||||
|
||||
if (path) {
|
||||
struct stat st_path;
|
||||
|
||||
memset(&st_path, 0, sizeof(st_path));
|
||||
if (stat(path, &st_path) < 0) {
|
||||
|
||||
if (errno == ENOENT || errno == ENOTDIR)
|
||||
return 0;
|
||||
|
||||
return -errno;
|
||||
}
|
||||
|
||||
return
|
||||
st_path.st_dev == st_fd.st_dev &&
|
||||
st_path.st_ino == st_fd.st_ino;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
static int sd_is_socket_internal(int fd, int type, int listening) {
|
||||
struct stat st_fd;
|
||||
|
||||
if (fd < 0 || type < 0)
|
||||
return -EINVAL;
|
||||
|
||||
if (fstat(fd, &st_fd) < 0)
|
||||
return -errno;
|
||||
|
||||
if (!S_ISSOCK(st_fd.st_mode))
|
||||
return 0;
|
||||
|
||||
if (type != 0) {
|
||||
int other_type = 0;
|
||||
socklen_t l = sizeof(other_type);
|
||||
|
||||
if (getsockopt(fd, SOL_SOCKET, SO_TYPE, &other_type, &l) < 0)
|
||||
return -errno;
|
||||
|
||||
if (l != sizeof(other_type))
|
||||
return -EINVAL;
|
||||
|
||||
if (other_type != type)
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (listening >= 0) {
|
||||
int accepting = 0;
|
||||
socklen_t l = sizeof(accepting);
|
||||
|
||||
if (getsockopt(fd, SOL_SOCKET, SO_ACCEPTCONN, &accepting, &l) < 0)
|
||||
return -errno;
|
||||
|
||||
if (l != sizeof(accepting))
|
||||
return -EINVAL;
|
||||
|
||||
if (!accepting != !listening)
|
||||
return 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
union sockaddr_union {
|
||||
struct sockaddr sa;
|
||||
struct sockaddr_in in4;
|
||||
struct sockaddr_in6 in6;
|
||||
struct sockaddr_un un;
|
||||
struct sockaddr_storage storage;
|
||||
};
|
||||
|
||||
int sd_is_socket(int fd, int family, int type, int listening) {
|
||||
int r;
|
||||
|
||||
if (family < 0)
|
||||
return -EINVAL;
|
||||
|
||||
if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
|
||||
return r;
|
||||
|
||||
if (family > 0) {
|
||||
union sockaddr_union sockaddr;
|
||||
socklen_t l;
|
||||
|
||||
memset(&sockaddr, 0, sizeof(sockaddr));
|
||||
l = sizeof(sockaddr);
|
||||
|
||||
if (getsockname(fd, &sockaddr.sa, &l) < 0)
|
||||
return -errno;
|
||||
|
||||
if (l < sizeof(sa_family_t))
|
||||
return -EINVAL;
|
||||
|
||||
return sockaddr.sa.sa_family == family;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int sd_is_socket_inet(int fd, int family, int type, int listening, uint16_t port) {
|
||||
union sockaddr_union sockaddr;
|
||||
socklen_t l;
|
||||
int r;
|
||||
|
||||
if (family != 0 && family != AF_INET && family != AF_INET6)
|
||||
return -EINVAL;
|
||||
|
||||
if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
|
||||
return r;
|
||||
|
||||
memset(&sockaddr, 0, sizeof(sockaddr));
|
||||
l = sizeof(sockaddr);
|
||||
|
||||
if (getsockname(fd, &sockaddr.sa, &l) < 0)
|
||||
return -errno;
|
||||
|
||||
if (l < sizeof(sa_family_t))
|
||||
return -EINVAL;
|
||||
|
||||
if (sockaddr.sa.sa_family != AF_INET &&
|
||||
sockaddr.sa.sa_family != AF_INET6)
|
||||
return 0;
|
||||
|
||||
if (family > 0)
|
||||
if (sockaddr.sa.sa_family != family)
|
||||
return 0;
|
||||
|
||||
if (port > 0) {
|
||||
if (sockaddr.sa.sa_family == AF_INET) {
|
||||
if (l < sizeof(struct sockaddr_in))
|
||||
return -EINVAL;
|
||||
|
||||
return htons(port) == sockaddr.in4.sin_port;
|
||||
} else {
|
||||
if (l < sizeof(struct sockaddr_in6))
|
||||
return -EINVAL;
|
||||
|
||||
return htons(port) == sockaddr.in6.sin6_port;
|
||||
}
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int sd_is_socket_unix(int fd, int type, int listening, const char *path, size_t length) {
|
||||
union sockaddr_union sockaddr;
|
||||
socklen_t l;
|
||||
int r;
|
||||
|
||||
if ((r = sd_is_socket_internal(fd, type, listening)) <= 0)
|
||||
return r;
|
||||
|
||||
memset(&sockaddr, 0, sizeof(sockaddr));
|
||||
l = sizeof(sockaddr);
|
||||
|
||||
if (getsockname(fd, &sockaddr.sa, &l) < 0)
|
||||
return -errno;
|
||||
|
||||
if (l < sizeof(sa_family_t))
|
||||
return -EINVAL;
|
||||
|
||||
if (sockaddr.sa.sa_family != AF_UNIX)
|
||||
return 0;
|
||||
|
||||
if (path) {
|
||||
if (length <= 0)
|
||||
length = strlen(path);
|
||||
|
||||
if (length <= 0)
|
||||
/* Unnamed socket */
|
||||
return l == offsetof(struct sockaddr_un, sun_path);
|
||||
|
||||
if (path[0])
|
||||
/* Normal path socket */
|
||||
return
|
||||
(l >= offsetof(struct sockaddr_un, sun_path) + length + 1) &&
|
||||
memcmp(path, sockaddr.un.sun_path, length+1) == 0;
|
||||
else
|
||||
/* Abstract namespace socket */
|
||||
return
|
||||
(l == offsetof(struct sockaddr_un, sun_path) + length) &&
|
||||
memcmp(path, sockaddr.un.sun_path, length) == 0;
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int sd_notify(int unset_environment, const char *state) {
|
||||
#if defined(DISABLE_SYSTEMD) || !defined(__linux__) || !defined(SOCK_CLOEXEC)
|
||||
return 0;
|
||||
#else
|
||||
int fd = -1, r;
|
||||
struct msghdr msghdr;
|
||||
struct iovec iovec;
|
||||
union sockaddr_union sockaddr;
|
||||
const char *e;
|
||||
|
||||
if (!state) {
|
||||
r = -EINVAL;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if (!(e = getenv("NOTIFY_SOCKET")))
|
||||
return 0;
|
||||
|
||||
/* Must be an abstract socket, or an absolute path */
|
||||
if ((e[0] != '@' && e[0] != '/') || e[1] == 0) {
|
||||
r = -EINVAL;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
if ((fd = socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC, 0)) < 0) {
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
memset(&sockaddr, 0, sizeof(sockaddr));
|
||||
sockaddr.sa.sa_family = AF_UNIX;
|
||||
strncpy(sockaddr.un.sun_path, e, sizeof(sockaddr.un.sun_path));
|
||||
|
||||
if (sockaddr.un.sun_path[0] == '@')
|
||||
sockaddr.un.sun_path[0] = 0;
|
||||
|
||||
memset(&iovec, 0, sizeof(iovec));
|
||||
iovec.iov_base = (char*) state;
|
||||
iovec.iov_len = strlen(state);
|
||||
|
||||
memset(&msghdr, 0, sizeof(msghdr));
|
||||
msghdr.msg_name = &sockaddr;
|
||||
msghdr.msg_namelen = offsetof(struct sockaddr_un, sun_path) + strlen(e);
|
||||
|
||||
if (msghdr.msg_namelen > sizeof(struct sockaddr_un))
|
||||
msghdr.msg_namelen = sizeof(struct sockaddr_un);
|
||||
|
||||
msghdr.msg_iov = &iovec;
|
||||
msghdr.msg_iovlen = 1;
|
||||
|
||||
if (sendmsg(fd, &msghdr, MSG_NOSIGNAL) < 0) {
|
||||
r = -errno;
|
||||
goto finish;
|
||||
}
|
||||
|
||||
r = 1;
|
||||
|
||||
finish:
|
||||
if (unset_environment)
|
||||
unsetenv("NOTIFY_SOCKET");
|
||||
|
||||
if (fd >= 0)
|
||||
close(fd);
|
||||
|
||||
return r;
|
||||
#endif
|
||||
}
|
||||
|
||||
int sd_notifyf(int unset_environment, const char *format, ...) {
|
||||
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
|
||||
return 0;
|
||||
#else
|
||||
va_list ap;
|
||||
char *p = NULL;
|
||||
int r;
|
||||
|
||||
va_start(ap, format);
|
||||
r = vasprintf(&p, format, ap);
|
||||
va_end(ap);
|
||||
|
||||
if (r < 0 || !p)
|
||||
return -ENOMEM;
|
||||
|
||||
r = sd_notify(unset_environment, p);
|
||||
free(p);
|
||||
|
||||
return r;
|
||||
#endif
|
||||
}
|
||||
|
||||
int sd_booted(void) {
|
||||
#if defined(DISABLE_SYSTEMD) || !defined(__linux__)
|
||||
return 0;
|
||||
#else
|
||||
|
||||
struct stat a, b;
|
||||
|
||||
/* We simply test whether the systemd cgroup hierarchy is
|
||||
* mounted */
|
||||
|
||||
if (lstat("/sys/fs/cgroup", &a) < 0)
|
||||
return 0;
|
||||
|
||||
if (lstat("/sys/fs/cgroup/systemd", &b) < 0)
|
||||
return 0;
|
||||
|
||||
return a.st_dev != b.st_dev;
|
||||
#endif
|
||||
}
|
||||
Loading…
Reference in New Issue