From 0d0f7a0e7c32842edff533246a1f8523306f9ab0 Mon Sep 17 00:00:00 2001 From: John Denker Date: Fri, 1 Jun 2012 23:07:51 -0700 Subject: as downloaded : ucspi-tcp --- ucspi-tcp-0.88/wait_pid.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 ucspi-tcp-0.88/wait_pid.c (limited to 'ucspi-tcp-0.88/wait_pid.c') diff --git a/ucspi-tcp-0.88/wait_pid.c b/ucspi-tcp-0.88/wait_pid.c new file mode 100644 index 0000000..d7a7e84 --- /dev/null +++ b/ucspi-tcp-0.88/wait_pid.c @@ -0,0 +1,39 @@ +#include +#include +#include "error.h" +#include "haswaitp.h" + +#ifdef HASWAITPID + +int wait_pid(wstat,pid) int *wstat; int pid; +{ + int r; + + do + r = waitpid(pid,wstat,0); + while ((r == -1) && (errno == error_intr)); + return r; +} + +#else + +/* XXX untested */ +/* XXX breaks down with more than two children */ +static int oldpid = 0; +static int oldwstat; /* defined if(oldpid) */ + +int wait_pid(wstat,pid) int *wstat; int pid; +{ + int r; + + if (pid == oldpid) { *wstat = oldwstat; oldpid = 0; return pid; } + + do { + r = wait(wstat); + if ((r != pid) && (r != -1)) { oldwstat = *wstat; oldpid = r; continue; } + } + while ((r == -1) && (errno == error_intr)); + return r; +} + +#endif -- cgit v1.2.3