~mdw / qmail / blame
| Commit | Line | Data |
|---|---|---|
| 2117e02e MW |
1 | .TH fd_copy 3 |
| 2 | .SH NAME | |
| 3 | fd_copy \- duplicate a descriptor | |
| 4 | .SH SYNTAX | |
| 5 | .B #include <fd.h> | |
| 6 | ||
| 7 | int \fBfd_copy\fP(\fIto\fR,\fIfrom\fR); | |
| 8 | ||
| 9 | int \fIto\fR; | |
| 10 | .br | |
| 11 | int \fIfrom\fR; | |
| 12 | .SH DESCRIPTION | |
| 13 | .B fd_copy | |
| 14 | copies | |
| 15 | descriptor | |
| 16 | .I from | |
| 17 | to descriptor | |
| 18 | .IR to . | |
| 19 | If | |
| 20 | .I to | |
| 21 | was already open, | |
| 22 | .B fd_copy | |
| 23 | closes it. | |
| 24 | .B fd_copy | |
| 25 | always leaves | |
| 26 | .I from | |
| 27 | intact; | |
| 28 | if | |
| 29 | .I to | |
| 30 | and | |
| 31 | .I from | |
| 32 | are the same number, | |
| 33 | .B fd_copy | |
| 34 | does nothing. | |
| 35 | ||
| 36 | .B fd_copy | |
| 37 | returns 0 on success, -1 on error. | |
| 38 | .B fd_copy | |
| 39 | does not guarantee that | |
| 40 | .I to | |
| 41 | will remain open, if it was open, in case of error. | |
| 42 | .SH "SEE ALSO" | |
| 43 | dup(2), | |
| 44 | fd_move(3) |