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Diffstat (limited to 'lib/libc/sys/dup.2')
| -rw-r--r-- | lib/libc/sys/dup.2 | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/lib/libc/sys/dup.2 b/lib/libc/sys/dup.2 index d9a7a3f..2d57eab 100644 --- a/lib/libc/sys/dup.2 +++ b/lib/libc/sys/dup.2 @@ -115,52 +115,6 @@ and is a valid descriptor, then .Fn dup2 is successful, and does nothing. -.Sh IMPLEMENTATION NOTES -In the non-threaded library -.Fn dup -is implemented as the -.Va dup -syscall. -.Pp -In the threaded library, the -.Va dup -syscall is assembled to -.Fn _thread_sys_dup -and -.Fn dup -is implemented as a function which locks -.Fa oldd -for read and write, then calls -.Fn _thread_sys_dup . -Before returning, -.Fn dup -unlocks -.Fa oldd . -.Pp -In the non-threaded library -.Fn dup2 -is implemented as the -.Va dup2 -syscall. -.Pp -In the threaded library, the -.Va dup2 -syscall is assembled to -.Fn _thread_sys_dup2 -and -.Fn dup2 -is implemented as a function which locks both -.Fa oldd -and -.Fa newd -for read and write, then calls -.Fn _thread_sys_dup2 . -Before returning, -.Fn dup2 -unlocks -.Fa oldd . -and -.Fa newd . .Sh RETURN VALUES The value -1 is returned if an error occurs in either call. The external variable |
