'\" t
.TH "SD_BOOTED" "3" "" "systemd 252" "sd_booted"
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.SH "NAME"
sd_booted \- Test whether the system is running the systemd init system
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <systemd/sd\-daemon\&.h>
.fi
.ft
.HP \w'int\ sd_booted('u
.BI "int sd_booted(void);"
.SH "DESCRIPTION"
.PP
\fBsd_booted()\fR
checks whether the system was booted up using the systemd init system\&.
.SH "RETURN VALUE"
.PP
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\&.
.SH "NOTES"
.PP
These APIs are implemented as a shared library, which can be compiled and linked to with the
\fBlibsystemd\fR\ \&\fBpkg-config\fR(1)
file\&.
.PP
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\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsd-daemon\fR(3)