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22 lines
764 B
22 lines
764 B
.TH mmap_private 3 |
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.SH NAME |
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mmap_private \- memory map a file for reading and writing |
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.SH SYNTAX |
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.B #include <mmap.h> |
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extern char* \fBmmap_private\fP(const char* \fIfilename\fR,unsigned long* \fIfilesize\fR); |
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.SH DESCRIPTION |
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mmap_private opens \fIfilename\fR for reading and writing, maps the |
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whole file into memory, closes the file, writes the length of the file |
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to \fIfilesize\fR and returns a pointer to the mapped file. |
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The file is mapped copy-on-write. Changes done to the mapped region |
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will not be written to disk. |
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The file is unmapped by the operating system if the process terminates. |
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It can also be manually unmapped by calling \fBmunmap\fR from |
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<sys/mman.h>. |
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If the file could not be opened or mapped, (void*)0 is returned. |
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.SH "SEE ALSO" |
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munmap(2)
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