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SD_BOOTED(3)			   sd_booted			  SD_BOOTED(3)

NAME
       sd_booted - Test whether the system is running the systemd init system

SYNOPSIS
       #include <systemd/sd-daemon.h>

       int sd_booted(void);

DESCRIPTION
       sd_booted() checks whether the system was booted up using the systemd
       init system.

RETURN VALUE
       On failure, this call returns a negative errno-style error code. If the
       system was booted up with systemd as init system, this call returns a
       positive return value, zero otherwise.

NOTES
       This function is provided by the reference implementation of APIs for
       new-style daemons and distributed with the systemd package. The
       algorithm it implements is simple, and can easily be reimplemented in
       daemons if it is important to support this interface without using the
       reference implementation.

       Internally, this function checks whether the directory
       /run/systemd/system/ exists. A simple check like this can also be
       implemented trivially in shell or any other language.

       For details about the algorithm check the liberally licensed reference
       implementation sources:
       http://cgit.freedesktop.org/systemd/systemd/plain/src/libsystemd-daemon/sd-daemon.c
       and
       http://cgit.freedesktop.org/systemd/systemd/plain/src/systemd/sd-daemon.h

       sd_booted() is implemented in the reference implementation's
       sd-daemon.c and sd-daemon.h files. These interfaces are available as a
       shared library, which can be compiled and linked to with the
       libsystemd-daemon pkg-config(1) file. Alternatively, applications
       consuming these APIs may copy the implementation into their source
       tree. For more details about the reference implementation, see sd-
       daemon(3).

       If the reference implementation is used as drop-in files and
       -DDISABLE_SYSTEMD is set during compilation, this function will always
       return 0 and otherwise become a NOP.

SEE ALSO
       systemd(1), sd-daemon(3)

systemd 208							  SD_BOOTED(3)

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