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document error signalling through (void*)0 return code.

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This commit is contained in:
leitner 2002-01-29 19:44:42 +00:00
parent 41e7e1f2a2
commit 95c129c81a
3 changed files with 6 additions and 0 deletions
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2
mmap/mmap_private.3
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@ -16,5 +16,7 @@ will not be written to disk.
The file is unmapped by the operating system if the process terminates. The file is unmapped by the operating system if the process terminates.
It can also be manually unmapped by calling \fBmunmap\fR from It can also be manually unmapped by calling \fBmunmap\fR from
<sys/mman.h>. <sys/mman.h>.
If the file could not be opened or mapped, (void*)0 is returned.
.SH "SEE ALSO" .SH "SEE ALSO"
munmap(2) munmap(2)

2
mmap/mmap_read.3
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@ -13,5 +13,7 @@ and returns a pointer to the mapped file.
The file is unmapped by the operating system if the process terminates. The file is unmapped by the operating system if the process terminates.
It can also be manually unmapped by calling \fBmunmap\fR from It can also be manually unmapped by calling \fBmunmap\fR from
<sys/mman.h>. <sys/mman.h>.
If the file could not be opened or mapped, (void*)0 is returned.
.SH "SEE ALSO" .SH "SEE ALSO"
munmap(2) munmap(2)

2
mmap/mmap_shared.3
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@ -20,5 +20,7 @@ It can also be manually unmapped by calling \fBmunmap\fR from
To write changes to disk immediately, you can use msync from To write changes to disk immediately, you can use msync from
<sys/mman.h>. <sys/mman.h>.
If the file could not be opened or mapped, (void*)0 is returned.
.SH "SEE ALSO" .SH "SEE ALSO"
munmap(2), msync(2) munmap(2), msync(2)