diff options
author | John Denker <jsd@av8n.com> | 2012-06-01 23:07:51 -0700 |
---|---|---|
committer | John Denker <jsd@av8n.com> | 2012-06-02 17:30:23 -0700 |
commit | 0d0f7a0e7c32842edff533246a1f8523306f9ab0 (patch) | |
tree | 43dbb2fffaa8d490731969f39f5d20832523bd5d /ucspi-tcp-0.88/wait_pid.c | |
parent | 94c58d7f8cabd9b1ff4c33c57a6ff76cdf3f955e (diff) |
as downloaded : ucspi-tcp
Diffstat (limited to 'ucspi-tcp-0.88/wait_pid.c')
-rw-r--r-- | ucspi-tcp-0.88/wait_pid.c | 39 |
1 files changed, 39 insertions, 0 deletions
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 <sys/types.h> +#include <sys/wait.h> +#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 |