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Diffstat (limited to 'mcon/U/d_open3.U')
| -rw-r--r-- | mcon/U/d_open3.U | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/mcon/U/d_open3.U b/mcon/U/d_open3.U new file mode 100644 index 0000000..a5fa847 --- /dev/null +++ b/mcon/U/d_open3.U @@ -0,0 +1,90 @@ +?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_open3.U,v $ +?RCS: Revision 3.0.1.2 1997/02/28 15:37:12 ram +?RCS: patch61: added ?F: metalint hint +?RCS: +?RCS: Revision 3.0.1.1 1995/07/25 13:58:26 ram +?RCS: patch56: added knowledge of the O_NONBLOCK symbol +?RCS: +?RCS: Revision 3.0 1993/08/18 12:06:44 ram +?RCS: Baseline for dist 3.0 netwide release. +?RCS: +?MAKE:d_open3: test +cc cat +cppflags h_fcntl h_sysfile rm Setvar Findhdr Warn +?MAKE: -pick add $@ %< +?X: It would be easy to separate the h_O_stuff from this. +?X: Is there a reason to do so? -- HMS +?S:d_open3: +?S: This variable conditionally defines the HAS_OPEN3 manifest constant, +?S: which indicates to the C program that the 3 argument version of +?S: the open(2) function is available. +?S:. +?C:HAS_OPEN3 (OPEN3): +?C: This manifest constant lets the C program know that the three +?C: argument form of open(2) is available. +?C:. +?H:#$d_open3 HAS_OPEN3 /**/ +?H:. +?W:%<:O_RDONLY O_WRONLY O_RDWR O_NDELAY O_APPEND O_SYNC O_CREAT O_TRUNC +?W:%<:O_EXCL O_NONBLOCK +?F:!open3 +?LINT:set d_open3 +?LINT:change h_fcntl h_sysfile +: Locate the flags for 'open()' +echo " " +$cat >open3.c <<'EOCP' +#include <sys/types.h> +#ifdef I_FCNTL +#include <fcntl.h> +#endif +#ifdef I_SYS_FILE +#include <sys/file.h> +#endif +int main(void) { + if(O_RDONLY); +#ifdef O_TRUNC + return 0; +#else + return 1; +#endif +} +EOCP +: check sys/file.h first to get FREAD on Sun +if $test `./findhdr sys/file.h` && \ + $cc $cppflags "-DI_SYS_FILE" -o open3 open3.c >/dev/null 2>&1 ; then + h_sysfile=true; + echo "<sys/file.h> defines the O_* constants..." >&4 + if ./open3; then + echo "and you have the 3 argument form of open()." >&4 + val="$define" + else + echo "but not the 3 argument form of open(). Oh, well." >&4 + val="$undef" + fi +elif $test `./findhdr fcntl.h` && \ + $cc "-DI_FCNTL" -o open3 open3.c >/dev/null 2>&1 ; then + h_fcntl=true; + echo "<fcntl.h> defines the O_* constants..." >&4 + if ./open3; then + echo "and you have the 3 argument form of open()." >&4 + val="$define" + else + echo "but not the 3 argument form of open(). Oh, well." >&4 + val="$undef" + fi +else + val="$undef" + ./warn "I can't find the O_* constant definitions! You got problems." 4>&4 +fi +set d_open3 +eval $setvar +$rm -f open3* + |