39 lines
709 B
C
39 lines
709 B
C
#include <sys/types.h>
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#include <sys/wait.h>
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#include "error.h"
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#include "haswaitp.h"
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#ifdef HASWAITPID
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int wait_pid(wstat,pid) int *wstat; int pid;
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{
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int r;
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do
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r = waitpid(pid,wstat,0);
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while ((r == -1) && (errno == error_intr));
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return r;
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}
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#else
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/* XXX untested */
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/* XXX breaks down with more than two children */
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static int oldpid = 0;
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static int oldwstat; /* defined if(oldpid) */
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int wait_pid(wstat,pid) int *wstat; int pid;
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{
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int r;
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if (pid == oldpid) { *wstat = oldwstat; oldpid = 0; return pid; }
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do {
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r = wait(wstat);
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if ((r != pid) && (r != -1)) { oldwstat = *wstat; oldpid = r; continue; }
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}
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while ((r == -1) && (errno == error_intr));
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return r;
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}
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#endif
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