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Diffstat (limited to 'mcon/U/d_pipe2.U')
| -rw-r--r-- | mcon/U/d_pipe2.U | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/mcon/U/d_pipe2.U b/mcon/U/d_pipe2.U new file mode 100644 index 0000000..df03115 --- /dev/null +++ b/mcon/U/d_pipe2.U @@ -0,0 +1,46 @@ +?RCS: +?RCS: Copyright (c) 2015, 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: +?MAKE:d_pipe2: Trylink cat i_unistd i_sysfile +?MAKE: -pick add $@ %< +?S:d_pipe2: +?S: This variable conditionally defines the HAS_PIPE2 symbol, which +?S: indicates to the C program that the pipe2() routine is available +?S: to create an inter-process channel with some flags. +?S:. +?C:HAS_PIPE2: +?C: This symbol, if defined, indicates that the pipe routine is +?C: available to create an inter-process channel with O_CLOEXEC or +?C: O_NONBLOCK flags. +?C:. +?H:#$d_pipe2 HAS_PIPE2 /**/ +?H:. +?LINT:set d_pipe2 +: see if pipe2 exists +$cat >try.c <<EOC +#$i_unistd I_UNISTD +#$i_sysfile I_SYS_FILE +#ifdef I_UNISTD +#include <unistd.h> +#endif +#ifdef I_SYS_FILE +#include <sys/file.h> /* For O_* constants */ +#endif +#include <fcntl.h> /* For O_* constants */ +int main(void) +{ + static int fds[2], ret; + ret |= pipe2(fds, O_CLOEXEC | O_NONBLOCK); + return ret ? 0 : 1; +} +EOC +cyn=pipe2 +set d_pipe2 +eval $trylink + |