'\" t
.TH "SD_BUS_REPLY_METHOD_ERROR" "3" "" "systemd 241" "sd_bus_reply_method_error"
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.\" * MAIN CONTENT STARTS HERE *
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.SH "NAME"
sd_bus_reply_method_error, sd_bus_reply_method_errorf, sd_bus_reply_method_errno, sd_bus_reply_method_errnof \- Reply with an error to a method call
.SH "SYNOPSIS"
.sp
.ft B
.nf
#include <systemd/sd\-bus\&.h>
.fi
.ft
.HP \w'int\ sd_bus_reply_method_error('u
.BI "int sd_bus_reply_method_error(sd_bus_message\ *" "call" ", const\ sd_bus_error\ *" "e" ");"
.HP \w'int\ sd_bus_reply_method_errorf('u
.BI "int sd_bus_reply_method_errorf(sd_bus_message\ *" "call" ", const\ char\ *" "name" ", const\ char\ *" "format" ", \&...);"
.HP \w'int\ sd_bus_reply_method_errno('u
.BI "int sd_bus_reply_method_errno(sd_bus_message\ *" "call" ", int\ " "error" ", const\ sd_bus_error\ *" "p" ");"
.HP \w'int\ sd_bus_reply_method_errnof('u
.BI "int sd_bus_reply_method_errnof(sd_bus_message\ *" "call" ", int\ " "error" ", const\ char\ *" "format" ", \&...);"
.SH "DESCRIPTION"
.PP
The
\fBsd_bus_reply_method_error()\fR
function sends an error reply to the
\fIcall\fR
message\&. The error structure
\fIe\fR
specifies the error to send, and is used as described in
\fBsd_bus_message_new_error\fR(3)\&. If no reply is expected to
\fIcall\fR, this function returns success without sending reply\&.
.PP
The
\fBsd_bus_reply_method_errorf()\fR
is to
\fBsd_bus_reply_method_error()\fR
what
\fBsd_bus_message_new_method_errorf()\fR
is to
\fBsd_bus_message_new_method_error()\fR\&.
.PP
The
\fBsd_bus_reply_method_errno()\fR
is to
\fBsd_bus_reply_method_error()\fR
what
\fBsd_bus_message_new_method_errno()\fR
is to
\fBsd_bus_message_new_method_error()\fR\&.
.PP
The
\fBsd_bus_reply_method_errnof()\fR
is to
\fBsd_bus_reply_method_error()\fR
what
\fBsd_bus_message_new_method_errnof()\fR
is to
\fBsd_bus_message_new_method_error()\fR\&.
.SH "RETURN VALUE"
.PP
These functions return 0 if the error reply was successfully sent or if none was expected, and a negative errno\-style error code otherwise\&.
.SH "ERRORS"
.PP
Returned errors may indicate the following problems:
.PP
\fB\-EINVAL\fR
.RS 4
The call message
\fIcall\fR
is
\fBNULL\fR\&.
.sp
Message
\fIcall\fR
is not a method call message\&.
.sp
Message
\fIcall\fR
is not attached to a bus\&.
.sp
The error
\fIerror\fR
parameter to
\fBsd_bus_reply_method_error\fR
is not set, see
\fBsd_bus_error_is_set\fR(3)\&.
.RE
.PP
\fB\-EPERM\fR
.RS 4
Message
\fIcall\fR
has been sealed\&.
.RE
.PP
\fB\-ENOTCONN\fR
.RS 4
The bus to which message
\fIcall\fR
is attached is not connected\&.
.RE
.PP
\fB\-ENOMEM\fR
.RS 4
Memory allocation failed\&.
.RE
.PP
In addition, any error message returned by
\fBsd_bus_send\fR(1)
may be returned\&.
.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\&.
.SH "SEE ALSO"
.PP
\fBsystemd\fR(1),
\fBsd-bus\fR(3),
\fBsd_bus_message_new_method_error\fR(3)