source: web/old/remctl-2.14/docs/api/remctl_command.3 @ f6f3e91

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Last change on this file since f6f3e91 was f6f3e91, checked in by Jessica B. Hamrick <jhamrick@…>, 15 years ago

Preserve directory hierarchy (not sure what happened to it)

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124.\" ========================================================================
125.\"
126.IX Title "REMCTL_COMMAND 3"
127.TH REMCTL_COMMAND 3 "2009-05-22" "2.14" "remctl Library Reference"
128.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
129.\" way too many mistakes in technical documents.
130.if n .ad l
131.nh
132.SH "NAME"
133remctl_command, remctl_commandv \- Send a command to a remctl server
134.SH "SYNOPSIS"
135.IX Header "SYNOPSIS"
136#include <remctl.h>
137.PP
138int \fBremctl_command\fR(struct remctl *\fIr\fR, const char **\fIcommand\fR);
139.PP
140#include <sys/uio.h>
141.PP
142int \fBremctl_commandv\fR(struct remctl *\fIr\fR, const struct iovec *\fIiov\fR,
143                    size_t \fIcount\fR);
144.SH "DESCRIPTION"
145.IX Header "DESCRIPTION"
146\&\fIremctl_command()\fR and \fIremctl_commandv()\fR send a command to a remote remctl
147server.  The remctl client object \fIr\fR, created with \fIremctl_new()\fR, should
148have previously been passed to \fIremctl_open()\fR to open a connection to the
149server.
150.PP
151\&\fIremctl_command()\fR takes the command as a NULL-terminated array of
152NUL-terminated strings (the same layout as an argv array).  This function
153is most convenient when passing simple text commands.
154.PP
155\&\fIremctl_commandv()\fR takes the command as an array of iovec structs of length
156\&\fIcount\fR.  This function is most convenient when passing arbitrary data to
157the command, since the iovec struct takes a pointer and a length for each
158chunk of data.  See \fIwritev\fR\|(2) for the layout of the iovec struct.
159.PP
160After calling one of these functions, call \fIremctl_output()\fR to get the
161results of the command.
162.SH "RETURN VALUE"
163.IX Header "RETURN VALUE"
164\&\fIremctl_command()\fR and \fIremctl_commandv()\fR return true on success and false on
165failure.  On failure, the caller should call \fIremctl_error()\fR to retrieve
166the error message.
167.SH "SEE ALSO"
168.IX Header "SEE ALSO"
169\&\fIremctl_new\fR\|(3), \fIremctl_open\fR\|(3), \fIremctl_output\fR\|(3), \fIremctl_error\fR\|(3)
170.PP
171The current version of the remctl library and complete details of the
172remctl protocol are available from its web page at
173<http://www.eyrie.org/~eagle/software/remctl/>.
174.SH "AUTHOR"
175.IX Header "AUTHOR"
176Russ Allbery <rra@stanford.edu>
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