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Diffstat (limited to 'mcon/U/d_dup2.U')
-rw-r--r-- | mcon/U/d_dup2.U | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/mcon/U/d_dup2.U b/mcon/U/d_dup2.U new file mode 100644 index 0000000..f807297 --- /dev/null +++ b/mcon/U/d_dup2.U @@ -0,0 +1,44 @@ +?RCS: $Id$ +?RCS: +?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi +?RCS: +?RCS: You may redistribute only under the terms of the Artistic License, +?RCS: as specified in the README file that comes with the distribution. +?RCS: You may reuse parts of this distribution only within the terms of +?RCS: that same Artistic License; a copy of which may be found at the root +?RCS: of the source tree for dist 4.0. +?RCS: +?RCS: $Log: d_dup2.U,v $ +?RCS: Revision 3.0 1993/08/18 12:05:56 ram +?RCS: Baseline for dist 3.0 netwide release. +?RCS: +?MAKE:d_dup2: Trylink cat i_unistd +?MAKE: -pick add $@ %< +?S:d_dup2: +?S: This variable conditionally defines HAS_DUP2 if dup2() is +?S: available to duplicate file descriptors. +?S:. +?C:HAS_DUP2 (DUP2): +?C: This symbol, if defined, indicates that the dup2 routine is +?C: available to duplicate file descriptors. +?C:. +?H:#$d_dup2 HAS_DUP2 /**/ +?H:. +?LINT:set d_dup2 +: see if dup2 exists +$cat >try.c <<EOC +#$i_unistd I_UNISTD +#ifdef I_UNISTD +#include <unistd.h> +#endif +int main(void) +{ + static int fd1, fd2, ret; + ret |= dup2(fd1, fd2); + return ret ? 0 : 1; +} +EOC +cyn=dup2 +set d_dup2 +eval $trylink + |