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+'\" t
+.TH "SD_BOOTED" "3" "" "systemd 255" "sd_booted"
+.\" -----------------------------------------------------------------
+.\" * Define some portability stuff
+.\" -----------------------------------------------------------------
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.\" http://bugs.debian.org/507673
+.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
+.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+.ie \n(.g .ds Aq \(aq
+.el .ds Aq '
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
+.ad l
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.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
+Functions described here are available as a shared library, which can be compiled against 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)