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Annotation of 43BSDTahoe/sys/h/user.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)user.h      7.1 (Berkeley) 6/4/86
        !             7:  */
        !             8: 
        !             9: #ifdef KERNEL
        !            10: #include "../machine/pcb.h"
        !            11: #include "dmap.h"
        !            12: #include "time.h"
        !            13: #include "resource.h"
        !            14: #include "namei.h"
        !            15: #else
        !            16: #include <machine/pcb.h>
        !            17: #include <sys/dmap.h>
        !            18: #include <sys/time.h>
        !            19: #include <sys/resource.h>
        !            20: #include <sys/namei.h>
        !            21: #endif
        !            22: 
        !            23: /*
        !            24:  * Per process structure containing data that
        !            25:  * isn't needed in core when the process is swapped out.
        !            26:  */
        !            27:  
        !            28: #define        MAXCOMLEN       16              /* <= MAXNAMLEN, >= sizeof(ac_comm) */
        !            29:  
        !            30: struct user {
        !            31:        struct  pcb u_pcb;
        !            32:        struct  proc *u_procp;          /* pointer to proc structure */
        !            33:        int     *u_ar0;                 /* address of users saved R0 */
        !            34:        char    u_comm[MAXCOMLEN + 1];
        !            35: 
        !            36: /* syscall parameters, results and catches */
        !            37:        int     u_arg[8];               /* arguments to current system call */
        !            38:        int     *u_ap;                  /* pointer to arglist */
        !            39:        label_t u_qsave;                /* for non-local gotos on interrupts */
        !            40:        union {                         /* syscall return values */
        !            41:                struct  {
        !            42:                        int     R_val1;
        !            43:                        int     R_val2;
        !            44:                } u_rv;
        !            45: #define        r_val1  u_rv.R_val1
        !            46: #define        r_val2  u_rv.R_val2
        !            47:                off_t   r_off;
        !            48:                time_t  r_time;
        !            49:        } u_r;
        !            50:        char    u_error;                /* return error code */
        !            51:        char    u_eosys;                /* special action on end of syscall */
        !            52: 
        !            53: /* 1.1 - processes and protection */
        !            54:        uid_t   u_uid;                  /* effective user id */
        !            55:        uid_t   u_ruid;                 /* real user id */
        !            56:        gid_t   u_gid;                  /* effective group id */
        !            57:        gid_t   u_rgid;                 /* real group id */
        !            58:        gid_t   u_groups[NGROUPS];      /* groups, 0 terminated */
        !            59: 
        !            60: /* 1.2 - memory management */
        !            61:        size_t  u_tsize;                /* text size (clicks) */
        !            62:        size_t  u_dsize;                /* data size (clicks) */
        !            63:        size_t  u_ssize;                /* stack size (clicks) */
        !            64:        struct  dmap u_dmap;            /* disk map for data segment */
        !            65:        struct  dmap u_smap;            /* disk map for stack segment */
        !            66:        struct  dmap u_cdmap, u_csmap;  /* shadows of u_dmap, u_smap, for
        !            67:                                           use of parent during fork */
        !            68:        label_t u_ssave;                /* label variable for swapping */
        !            69:        size_t  u_odsize, u_ossize;     /* for (clumsy) expansion swaps */
        !            70:        time_t  u_outime;               /* user time at last sample */
        !            71: 
        !            72: /* 1.3 - signal management */
        !            73:        int     (*u_signal[NSIG])();    /* disposition of signals */
        !            74:        int     u_sigmask[NSIG];        /* signals to be blocked */
        !            75:        int     u_sigonstack;           /* signals to take on sigstack */
        !            76:        int     u_sigintr;              /* signals that interrupt syscalls */
        !            77:        int     u_oldmask;              /* saved mask from before sigpause */
        !            78:        int     u_code;                 /* ``code'' to trap */
        !            79:        struct  sigstack u_sigstack;    /* sp & on stack state variable */
        !            80: #define        u_onstack       u_sigstack.ss_onstack
        !            81: #define        u_sigsp         u_sigstack.ss_sp
        !            82: 
        !            83: /* 1.4 - descriptor management */
        !            84:        struct  file *u_ofile[NOFILE];  /* file structures for open files */
        !            85:        char    u_pofile[NOFILE];       /* per-process flags of open files */
        !            86:        int     u_lastfile;             /* high-water mark of u_ofile */
        !            87: #define        UF_EXCLOSE      0x1             /* auto-close on exec */
        !            88: #define        UF_MAPPED       0x2             /* mapped from device */
        !            89:        struct  inode *u_cdir;          /* current directory */
        !            90:        struct  inode *u_rdir;          /* root directory of current process */
        !            91:        struct  tty *u_ttyp;            /* controlling tty pointer */
        !            92:        dev_t   u_ttyd;                 /* controlling tty dev */
        !            93:        short   u_cmask;                /* mask for file creation */
        !            94: 
        !            95: /* 1.5 - timing and statistics */
        !            96:        struct  rusage u_ru;            /* stats for this proc */
        !            97:        struct  rusage u_cru;           /* sum of stats for reaped children */
        !            98:        struct  itimerval u_timer[3];
        !            99:        int     u_XXX[3];
        !           100:        struct  timeval u_start;
        !           101:        short   u_acflag;
        !           102: 
        !           103:        struct uprof {                  /* profile arguments */
        !           104:                short   *pr_base;       /* buffer base */
        !           105:                unsigned pr_size;       /* buffer size */
        !           106:                unsigned pr_off;        /* pc offset */
        !           107:                unsigned pr_scale;      /* pc scaling */
        !           108:        } u_prof;
        !           109: 
        !           110: /* 1.6 - resource controls */
        !           111:        struct  rlimit u_rlimit[RLIM_NLIMITS];
        !           112:        struct  quota *u_quota;         /* user's quota structure */
        !           113:        int     u_qflags;               /* per process quota flags */
        !           114: 
        !           115: /* namei & co. */
        !           116:        struct nameicache {             /* last successful directory search */
        !           117:                int nc_prevoffset;      /* offset at which last entry found */
        !           118:                ino_t nc_inumber;       /* inum of cached directory */
        !           119:                dev_t nc_dev;           /* dev of cached directory */
        !           120:                time_t nc_time;         /* time stamp for cache entry */
        !           121:        } u_ncache;
        !           122:        struct  nameidata u_nd;
        !           123: 
        !           124:        int     u_stack[1];
        !           125: };
        !           126: 
        !           127: /* u_eosys values */
        !           128: #define        JUSTRETURN      1
        !           129: #define        RESTARTSYS      2
        !           130: #define NORMALRETURN   3
        !           131: 
        !           132: /* u_error codes */
        !           133: #ifdef KERNEL
        !           134: #include "errno.h"
        !           135: #else
        !           136: #include <errno.h>
        !           137: #endif
        !           138: 
        !           139: #ifdef KERNEL
        !           140: extern struct user u;
        !           141: extern struct user swaputl;
        !           142: extern struct user forkutl;
        !           143: extern struct user xswaputl;
        !           144: extern struct user xswap2utl;
        !           145: extern struct user pushutl;
        !           146: extern struct user vfutl;
        !           147: #endif

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