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.TH buffer_mmapread 3
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.SH NAME
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buffer_mmapread \- create read-only memory-mapped file buffer
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.SH SYNTAX
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.B #include <buffer.h>
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int \fBbuffer_mmapread\fR(buffer &\fIb\fR,const char* \fIfilename\fR);
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.SH DESCRIPTION
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buffer_mmapread opens \fIfilename\fR for reading and fills \fIb\fR so
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that the contents of the file can be read from it. Using mmap is more
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efficient than reading through a real buffer, but you have to call
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buffer_close to unmap the memory in the end.
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.SH EXAMPLE
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#include <buffer.h>
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#include <open.h>
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buffer input;
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char x;
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buffer_mmapread(&input,"/etc/passwd");
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while (buffer_get(&input,&x,1)==1) {
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buffer_put(buffer_1,&x,1);
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if (x=='\\n') break;
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}
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buffer_flush(buffer_1);
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buffer_close(&input);
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.SH "RETURN VALUE"
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\fBbuffer_mmapread\fR returns 0 if everything was fine, -1 on error
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(setting \fIerrno\fR).
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.SH "SEE ALSO"
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buffer_flush(3), buffer(3)
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