diff options
Diffstat (limited to 'mcon/U/nblock_io.U')
| -rw-r--r-- | mcon/U/nblock_io.U | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/mcon/U/nblock_io.U b/mcon/U/nblock_io.U index eb3a6a8..23ee763 100644 --- a/mcon/U/nblock_io.U +++ b/mcon/U/nblock_io.U @@ -1,11 +1,11 @@ -?RCS: $Id: nblock_io.U 1 2006-08-24 12:32:52Z rmanfredi $ +?RCS: $Id: nblock_io.U 167 2013-05-08 17:58:00Z rmanfredi $ ?RCS: ?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi ?RCS: -?RCS: You may redistribute only under the terms of the Artistic Licence, +?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 Licence; a copy of which may be found at the root +?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: nblock_io.U,v $ @@ -55,6 +55,12 @@ ?C:VAL_EAGAIN: ?C: This symbol holds the errno error code set by read() when no data was ?C: present on the non-blocking file descriptor. +?C: +?C: FIXME: And who guarantees this isn't e.g. device-dependent? +?C: If EAGAIN is defined one should expect it. +?C: If EWOULDBLOCK is defined one should expect it. +?C: If both are defined one should expect both. +?C: -- cbiere, 2011-01-18 ?C:. ?C:RD_NODATA: ?C: This symbol holds the return code from read() when no data is present @@ -91,22 +97,22 @@ case "$o_nonblock" in '') $cat head.c > try.c $cat >>try.c <<'EOCP' -int main() { +#include <stdio.h> +int main(void) { #ifdef O_NONBLOCK printf("O_NONBLOCK\n"); - exit(0); + return 0; #endif #ifdef O_NDELAY printf("O_NDELAY\n"); - exit(0); + return 0; #endif ?X: Stevens "Advanced Programming in the UNIX Environment" page 364 mentions ?X: the FNDELAY symbol, used in 4.33BSD (source: Paul Marquess). #ifdef FNDELAY printf("FNDELAY\n"); - exit(0); #endif - exit(0); + return 0; } EOCP if $cc $ccflags $ldflags -o try try.c >/dev/null 2>&1; then @@ -132,6 +138,7 @@ case "$eagain" in #include <errno.h> #include <sys/types.h> #include <signal.h> +#include <stdlib.h> #define MY_O_NONBLOCK $o_nonblock extern int errno; $signal_t blech(x) int x; { exit(3); } @@ -184,7 +191,7 @@ int main() close(pu[1]); /* We read from pu[0] */ read(pu[0], buf, 1); /* Wait for parent to signal us we may continue */ close(pd[1]); /* Pipe pd is now fully closed! */ - exit(0); /* Bye bye, thank you for playing! */ + return 0; /* Bye bye, thank you for playing! */ } EOCP if $cc $ccflags $ldflags -o try try.c >/dev/null 2>&1; then @@ -226,7 +233,7 @@ EOCP esac val="$define" if test "$status" = "$rd_nodata"; then - ./warn "your read() can't distinguish between EOF and no data!" + ./warn "your read() can't distinguish between EOF and no data!" 4>&4 val="$undef" fi else |