40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
#define _GNU_SOURCE
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#include <sys/wait.h>
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#include <sys/resource.h>
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#include <string.h>
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#include <errno.h>
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#include "syscall.h"
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pid_t wait4(pid_t pid, int *status, int options, struct rusage *ru)
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{
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int r;
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#ifdef SYS_wait4_time64
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if (ru) {
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long long kru64[18];
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r = __syscall(SYS_wait4_time64, pid, status, options, kru64);
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if (!r) {
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ru->ru_utime = (struct timeval)
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{ .tv_sec = kru64[0], .tv_usec = kru64[1] };
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ru->ru_stime = (struct timeval)
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{ .tv_sec = kru64[2], .tv_usec = kru64[3] };
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char *slots = (char *)&ru->ru_maxrss;
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for (int i=0; i<14; i++)
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*(long *)(slots + i*sizeof(long)) = kru64[4+i];
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}
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if (SYS_wait4_time64 == SYS_wait4 || r != -ENOSYS)
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return __syscall_ret(r);
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}
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#endif
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char *dest = ru ? (char *)&ru->ru_maxrss - 4*sizeof(long) : 0;
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r = __syscall(SYS_wait4, pid, status, options, dest);
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if (r>0 && ru && sizeof(time_t) > sizeof(long)) {
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long kru[4];
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memcpy(kru, dest, 4*sizeof(long));
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ru->ru_utime = (struct timeval)
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{ .tv_sec = kru[0], .tv_usec = kru[1] };
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ru->ru_stime = (struct timeval)
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{ .tv_sec = kru[2], .tv_usec = kru[3] };
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}
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return __syscall_ret(r);
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}
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