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typedef struct psinfo {
    int     pr_flag;        /* process flags */
    int     pr_nlwp;        /* number of lwps in process */
    pid_t   pr_pid;         /* unique process id */
    pid_t   pr_ppid;        /* process id of parent */
    pid_t   pr_pgid;        /* pid of process group leader */
    pid_t   pr_sid;         /* session id */
    uid_t   pr_uid;         /* real user id */
    uid_t   pr_euid;        /* effective user id */
    gid_t   pr_gid;         /* real group id */
    gid_t   pr_egid;        /* effective group id */
    uintptr_t pr_addr;      /* address of process */
    size_t  pr_size;        /* size of process image in Kbytes */
    size_t  pr_rssize;      /* resident set size in Kbytes */
    size_t  pr_pad1;
    dev_t   pr_ttydev;      /* controlling tty device (or PRNODEV) */
        /* The following percent numbers are 16-bit binary */
        /* fractions [0 .. 1] with the binary point to the */
        /* right of the high-order bit (1.0 == 0x8000) */
    ushort_t pr_pctcpu;     /* % of recent cpu time used by all lwps */
    ushort_t pr_pctmem;     /* % of system memory used by process */
    timestruc_t pr_start;   /* process start time, from the epoch */
    timestruc_t pr_time;    /* usr+sys cpu time for this process */
    timestruc_t pr_ctime;   /* usr+sys cpu time for reaped children */
    char    pr_fname[PRFNSZ];       /* name of execed file */
    char    pr_psargs[PRARGSZ];     /* initial characters of arg list */
    int     pr_wstat;       /* if zombie, the wait() status */
    int     pr_argc;        /* initial argument count */
    uintptr_t pr_argv;      /* address of initial argument vector */
    uintptr_t pr_envp;      /* address of initial environment vector */
    char    pr_dmodel;      /* data model of the process */
    char    pr_pad2[3];
    int     pr_filler[7];   /* reserved for future use */
} psinfo_t;