nut-debian/docs/man/upscli_sendline.3

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.\"     Title: upscli_sendline
.\"    Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
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.\"      Date: 04/26/2022
.\"    Manual: NUT Manual
.\"    Source: Network UPS Tools 2.8.0
.\"  Language: English
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.TH "UPSCLI_SENDLINE" "3" "04/26/2022" "Network UPS Tools 2\&.8\&.0" "NUT Manual"
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.SH "NAME"
upscli_sendline, upscli_sendline_timeout \- send a single command to a UPS
.SH "SYNOPSIS"
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.nf
#include <upsclient\&.h>
#include <time\&.h> /* or <sys/time\&.h> on some platforms */
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.nf
int upscli_sendline(UPSCONN_t *ups, const char *buf, size_t buflen);
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int upscli_sendline_timeout(UPSCONN_t *ups, const char *buf, size_t buflen,
                               const time_t timeout);
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.SH "DESCRIPTION"
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The \fBupscli_sendline()\fR and \fBupscli_sendline_timeout()\fR functions take the pointer \fIups\fR to a UPSCONN_t state structure and transmit a buffer \fIbuf\fR of size \fIbuflen\fR to the server\&.
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The data in \fIbuf\fR must be a fully formatted protocol command as no parsing of the buffer occurs within this function\&.
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The difference between the two functions is that \fBupscli_sendline_timeout()\fR lets the caller decide the amount of time (\fItimeout\fR seconds) after which it should give up and return, whereas \fBupscli_sendline()\fR does not offer this freedom, and uses an immediate timeout (0 second)\&.
.SH "RETURN VALUE"
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The \fBupscli_sendline()\fR and \fBupscli_sendline_timeout()\fR functions return 0 on success, or \-1 if an error occurs\&.
.SH "SEE ALSO"
.sp
\fBupscli_fd\fR(3), \fBupscli_get\fR(3), \fBupscli_readline\fR(3), \fBupscli_sendline\fR(3), \fBupscli_ssl\fR(3), \fBupscli_strerror\fR(3), \fBupscli_upserror\fR(3)