| 1 |
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| 2 | |
| 3 | * wait definitions for NOLIBC
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| 4 | * Copyright (C) 2017-2021 Willy Tarreau <[email protected]>
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| 5 |
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| 6 |
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| 7 |
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| 8 | #include "../nolibc.h"
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| 9 |
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| 10 | #ifndef _NOLIBC_SYS_WAIT_H
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| 11 | #define _NOLIBC_SYS_WAIT_H
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| 12 |
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| 13 | #include "../arch.h"
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| 14 | #include "../std.h"
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| 15 | #include "../types.h"
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| 16 |
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| 17 | |
| 18 | * pid_t wait(int *status);
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| 19 | * pid_t waitpid(pid_t pid, int *status, int options);
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| 20 | * int waitid(idtype_t idtype, id_t id, siginfo_t *infop, int options);
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| 21 |
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| 22 |
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| 23 | static __attribute__((unused))
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| 24 | int _sys_waitid(int which, pid_t pid, siginfo_t *infop, int options, struct rusage *rusage)
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| 25 | {
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| 26 | return __nolibc_syscall5(__NR_waitid, which, pid, infop, options, rusage);
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| 27 | }
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| 28 |
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| 29 | static __attribute__((unused))
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| 30 | int waitid(int which, pid_t pid, siginfo_t *infop, int options)
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| 31 | {
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| 32 | return __sysret(_sys_waitid(which, pid, infop, options, NULL));
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| 33 | }
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| 34 |
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| 35 |
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| 36 | static __attribute__((unused))
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| 37 | pid_t waitpid(pid_t pid, int *status, int options)
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| 38 | {
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| 39 | int idtype, ret;
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| 40 | siginfo_t info;
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| 41 | pid_t id;
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| 42 |
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| 43 | if (pid == INT_MIN) {
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| 44 | SET_ERRNO(ESRCH);
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| 45 | return -1;
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| 46 | } else if (pid < -1) {
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| 47 | idtype = P_PGID;
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| 48 | id = -pid;
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| 49 | } else if (pid == -1) {
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| 50 | idtype = P_ALL;
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| 51 | id = 0;
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| 52 | } else if (pid == 0) {
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| 53 | idtype = P_PGID;
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| 54 | id = 0;
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| 55 | } else {
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| 56 | idtype = P_PID;
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| 57 | id = pid;
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| 58 | }
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| 59 |
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| 60 | options |= WEXITED;
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| 61 |
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| 62 | ret = waitid(idtype, id, &info, options);
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| 63 | if (ret)
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| 64 | return -1;
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| 65 |
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| 66 | switch (info.si_code) {
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| 67 | case 0:
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| 68 | if (status)
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| 69 | *status = 0;
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| 70 | break;
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| 71 | case CLD_EXITED:
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| 72 | if (status)
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| 73 | *status = (info.si_status & 0xff) << 8;
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| 74 | break;
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| 75 | case CLD_KILLED:
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| 76 | if (status)
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| 77 | *status = info.si_status & 0x7f;
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| 78 | break;
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| 79 | case CLD_DUMPED:
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| 80 | if (status)
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| 81 | *status = (info.si_status & 0x7f) | 0x80;
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| 82 | break;
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| 83 | case CLD_STOPPED:
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| 84 | case CLD_TRAPPED:
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| 85 | if (status)
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| 86 | *status = (info.si_status << 8) + 0x7f;
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| 87 | break;
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| 88 | case CLD_CONTINUED:
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| 89 | if (status)
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| 90 | *status = 0xffff;
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| 91 | break;
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| 92 | default:
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| 93 | return -1;
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| 94 | }
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| 95 |
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| 96 | return info.si_pid;
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| 97 | }
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| 98 |
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| 99 | static __attribute__((unused))
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| 100 | pid_t wait(int *status)
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| 101 | {
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| 102 | return waitpid(-1, status, 0);
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| 103 | }
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| 104 |
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| 105 | #endif
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