.TH "IXP_ERRBUF" 3 "2012 Dec" "libixp Manual"


.SH NAME

.P
ixp_errbuf, ixp_errstr, ixp_rerrstr, ixp_werrstr, ixp_vsnprint

.SH SYNOPSIS

.nf
#include <ixp.h>

char *ixp_errbuf(void);

void ixp_errstr(char *buf, int nbuf);

void ixp_rerrstr(char *buf, int nbuf);

void ixp_werrstr(const char *fmt, ...);

int      (*ixp_vsnprint)(char *buf, int nbuf, const char *fmt, va_list);
.fi


.SH PARAMETERS

.TP
buf
The buffer to read and/or fill.
.TP
nbuf
The size of the buffer.
.TP
fmt
A format string with which to write the errstr.
.TP
.RB ...
Arguments to \fIfmt\fR.

.SH DESCRIPTION

.P
These functions simulate Plan 9's errstr functionality.
They replace errno in libixp. Note that these functions
are not internationalized.

.P
\fBixp_errbuf(3)\fR returns the errstr buffer for the current
thread. \fBixp_rerrstr(3)\fR fills \fIbuf\fR with the data from
the current thread's error buffer, while \fBixp_errstr(3)\fR
exchanges \fIbuf\fR's contents with those of the current
thread's error buffer. \fBixp_werrstr(3)\fR formats the given
format string, \fIfmt\fR, via \fBixp_vsnprint(3)\fR and writes it to
the error buffer.

.P
\fBixp_vsnprint(3)\fR may be set to a function which will format
its arguments write the result to the \fInbuf\fR length buffer
\fBbuf(3)\fR. The default value is \fBvsnprintf(3)\fR. The function must
format '%s' as a nul\-terminated string and may not consume
any arguments not indicated by a %\-prefixed format specifier,
but may otherwise behave in any manner chosen by the user.

.SH SEE ALSO

.P
ixp_vsmprint(3)

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