53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
#include <mlvalues.h>
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#include <alloc.h>
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#include <memory.h>
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#include "unix.h"
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#ifdef HAS_WAITPID
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#include <sys/types.h>
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#include <sys/wait.h>
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static int wait_flag_table[] = {
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WNOHANG, WUNTRACED
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};
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value unix_waitpid(flags, pid_req)
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value flags, pid_req;
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{
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int pid, status;
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value res;
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Push_roots(r, 1);
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#define st r[0]
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pid = waitpid(Int_val(pid_req), &status,
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convert_flag_list(flags, wait_flag_table));
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if (pid == -1) uerror("waitpid", Nothing);
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switch (status & 0xFF) {
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case 0:
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st = alloc(1, 0);
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Field(st, 0) = Val_int((status >> 8) & 0xFF);
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break;
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case 0177:
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st = alloc(1, 2);
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Field(st, 0) = Val_int((status >> 8) & 0xFF);
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break;
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default:
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st = alloc(2, 1);
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Field(st, 0) = Val_int(status & 0x3F);
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Field(st, 1) = status & 0200 ? Val_true : Val_false;
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break;
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}
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res = alloc_tuple(2);
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Field(res, 0) = Val_int(pid);
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Field(res, 1) = st;
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Pop_roots();
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return res;
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}
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#else
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value unix_waitpid() { invalid_argument("waitpid not implemented"); }
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#endif
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