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Annotation of coherent/a/usr/bob/korn/sh.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Public Domain Bourne/Korn shell
        !             3:  */
        !             4: /* allow for non-Unix linkers. main.c has a "#define Extern " */
        !             5: #ifndef Extern
        !             6: #define        Extern  extern
        !             7: #endif
        !             8: 
        !             9: typedef int bool_t;
        !            10: #define        FALSE   0
        !            11: #define        TRUE    1
        !            12: 
        !            13: #ifndef SHELL
        !            14: #define        SHELL   "/bin/sh"       /* shell to exec scripts */
        !            15: #endif
        !            16: 
        !            17: #if __STDC__
        !            18: #define        ARGS(args)      args    /* prototype declaration */
        !            19: #define        Void    void            /* generic pointer */
        !            20: #define        Const   const           /* constant data */
        !            21: #define        Volatile volatile       /* you know */
        !            22: #else
        !            23: #define        ARGS(args)      ()      /* K&R declaration */
        !            24: #define        Void    char
        !            25: #define        Const   
        !            26: #define        Volatile 
        !            27: #endif
        !            28: 
        !            29: #define        sizeofN(type, n) (sizeof(type) * (n))
        !            30: #define        BIT(i)  (1<<(i))        /* define bit in flag */
        !            31: 
        !            32: #define        NUFILE  10              /* Number of user-accessible files */
        !            33: #define        FDBASE  10              /* First file usable by Shell */
        !            34: 
        !            35: /* you're not going to run setuid shell scripts, are you? */
        !            36: 
        !            37: #define        MAGIC   (char)0x80      /* prefix for ~*?[ during expand */
        !            38: 
        !            39: #define        LINE    256             /* input line size */
        !            40: #define        PATH    256             /* pathname size */
        !            41: 
        !            42: Extern int     exstat;         /* exit status */
        !            43: Extern int     async;          /* $!, last &'d pid */
        !            44: 
        !            45: /*
        !            46:  * Area-based allocation built on malloc/free
        !            47:  */
        !            48: 
        !            49: typedef struct Area {
        !            50:        struct Block *free;     /* free list */
        !            51: } Area;
        !            52: 
        !            53: extern Area    aperm;          /* permanent object space */
        !            54: #define        APERM   &aperm
        !            55: #define        ATEMP   &e.area
        !            56: 
        !            57: Area   *ainit ARGS((Area *ap));                /* initialize Area */
        !            58: void   afreeall ARGS((Area *ap));      /* free Area's contents */
        !            59: void   ashrink ARGS((Area *ap));       /* unimplimented */
        !            60: void   aerror ARGS((Area *ap, const char *msg)); /* error handler */
        !            61: 
        !            62: Void   *alloc ARGS((size_t size, Area *ap)); /* alloc object from Area */
        !            63: Void   *aresize ARGS((Void *ptr, size_t size, Area *ap)); /* shrink object */
        !            64: void   afree ARGS((Void *ptr, Area *ap)); /* free ojbect in Area */
        !            65: 
        !            66: /*
        !            67:  * parsing & execution environment
        !            68:  */
        !            69: Extern struct  env {
        !            70:        int     type;                   /* enviroment type - see below */
        !            71:        Area    area;                   /* temporary allocation area */
        !            72:        struct  block *loc;             /* local variables and functions */
        !            73:        short  *savefd;                 /* original redirected fd's */
        !            74:        struct  env *oenv;              /* link to previous enviroment */
        !            75:        jmp_buf jbuf;                   /* long jump back to env creator */
        !            76:        int     interactive;            /* fd's 0,1,2 are tty */
        !            77:        struct temp *temps;             /* temp files */
        !            78: } e;
        !            79: 
        !            80: #define        E_NONE  0               /* dummy enviroment */
        !            81: #define        E_PARSE 1               /* parsing command # */
        !            82: #define        E_EXEC  2               /* executing command tree */
        !            83: #define        E_LOOP  3               /* executing for/while # */
        !            84: #define        E_TCOM  5               /* executing simple command */
        !            85: #define        E_FUNC  6               /* executing function */
        !            86: #define        E_ERRH  7               /* general error handler # */
        !            87: /* # indicates env has valid jbuf */
        !            88: 
        !            89: /*
        !            90:  * flags
        !            91:  */
        !            92: #define        FEXPORT FLAG('a')       /* -a: allexport */
        !            93: #define        FERREXIT FLAG('e')      /* -e: errexit (quit on error) */
        !            94: #define        FBGNICE 29              /* bgnice */
        !            95: #define        FEMACS 30               /* emacs */
        !            96: #define        FIGNEOF 27              /* ignoreeof (eof does not exit) */
        !            97: #define        FHASHALL FLAG('h')      /* -h: trackall, hashall */
        !            98: #define        FTALKING FLAG('i')      /* -i: interactive (talking type wireless) */
        !            99: #define        FKEYWORD FLAG('k')      /* -k: keyword (name=value anywhere) */
        !           100: #define        FMARKDIRS 28            /* markdirs */
        !           101: #define        FMONITOR FLAG('m')      /* -m: monitor */
        !           102: #define        FNOEXEC FLAG('n')       /* -n: noexec */
        !           103: #define        FNOGLOB FLAG('f')       /* -f: noglob */
        !           104: #define        FPRIVILEGED FLAG('p')   /* -p: privileged */
        !           105: #define        FSTDIN  FLAG('s')       /* -s (invocation): parse stdin */
        !           106: #define        FNOUNSET FLAG('u')      /* -u: nounset (unset vars is error) */
        !           107: #define        FVERBOSE FLAG('v')      /* -v: verbose (echo input) */
        !           108: #define        FXTRACE FLAG('x')       /* -x: (execute) xtrace */
        !           109: 
        !           110: #define        FLAG(c) (1 + c - 'a')   /* map char to flags index */
        !           111: #define        FLAGS   32
        !           112: Extern char flag [FLAGS];
        !           113: int    option ARGS((Const char *name));
        !           114: char   *getoptions ARGS((void));
        !           115: void   printoptions ARGS((void));
        !           116: void   mail ARGS((void));
        !           117: 
        !           118: extern char    null [];        /* null value for variable */
        !           119: 
        !           120: /*
        !           121:  * other functions
        !           122:  */
        !           123: char   *search();
        !           124: struct tbl *findcom();
        !           125: char   *strsave ARGS((char *, Area *));
        !           126: char   *ulton ARGS((unsigned long n, int base));
        !           127: int    xstrcmp();
        !           128: void   qsortp ARGS((void **base, size_t n, int (*compare)(void *, void *)));
        !           129: long   evaluate ARGS((Const char *expr));
        !           130: void   resetopts();
        !           131: void   histsave();
        !           132: void   histlist();
        !           133: 
        !           134: #if EDIT
        !           135: void   x_init();
        !           136: void   x_bind();
        !           137: int    x_read();
        !           138: #endif
        !           139: 
        !           140: void   j_init ARGS((void));
        !           141: void   j_exit ARGS((void));
        !           142: void   j_notify ARGS((void));
        !           143: void   j_kill ARGS((int job, int sig));
        !           144: #ifdef JOBS
        !           145: void   j_change ARGS((void));
        !           146: int    j_resume ARGS((int job, int bg));
        !           147: #endif
        !           148: 
        !           149: /*
        !           150:  * error handling
        !           151:  */
        !           152: void   leave();        /* abort shell (or fail in subshell) */
        !           153: 
        !           154: /*
        !           155:  * library functions
        !           156:  */
        !           157: typedef        void (*handler_t)();    /* signal handler */
        !           158: 
        !           159: /* temp/here files. the file is removed when the struct is freed */
        !           160: struct temp {
        !           161:        struct  temp * next;
        !           162:        char   *name;
        !           163: };
        !           164: struct temp *maketemp ARGS((Area *ap));
        !           165: 
        !           166: /*
        !           167:  * stdio and our IO routines
        !           168:  */
        !           169: 
        !           170: #ifdef BUFSIZ                  /* <stdio.h> included? */
        !           171: extern FILE *  shf [NUFILE];   /* map shell fd to FILE */
        !           172: #endif
        !           173: void   fopenshf();
        !           174: void   flushshf();
        !           175: 
        !           176: #undef stdin
        !           177: #undef stdout
        !           178: 
        !           179: #define        stdin   shf[0]          /* standard input */
        !           180: #define        stdout  shf[1]          /* standard output */
        !           181: #define        shlout  shf[2]          /* shell output */
        !           182: 
        !           183: int    shellf ARGS((Const char *fmt, ...)); /* fprintf(shlout, ); */
        !           184: int    errorf ARGS((Const char *fmt, ...)); /* fprintf(shlout, ); error(); */
        !           185: 
        !           186: /*
        !           187:  * IO control
        !           188:  */
        !           189: extern int ttyfd;              /* tty fd (original fd 0) */
        !           190: 
        !           191: int    savefd ARGS((int fd));  /* save user fd */
        !           192: void   restfd ARGS((int fd, int ofd));
        !           193: void   openpipe ARGS((int [2]));
        !           194: void   closepipe ARGS((int [2]));;
        !           195: 
        !           196: /*
        !           197:  * trap handlers
        !           198:  */
        !           199: typedef struct trap {
        !           200:        int     signal;         /* signal number */
        !           201:        char   *name;           /* short name */
        !           202:        char   *mess;           /* descriptive name */
        !           203:        char   *trap;           /* trap command */
        !           204:        short   Volatile set;   /* trap pending */
        !           205:        char    ourtrap;        /* not ignored (?) */
        !           206:        char    sig_dfl;        /* originally SIG_DFL */
        !           207: } Trap;
        !           208: 
        !           209: #define        SIGNALS 32
        !           210: 
        !           211: Extern int Volatile trap;      /* traps pending? */
        !           212: extern Trap    sigtraps[SIGNALS];
        !           213: Trap    *gettrap ARGS((char *)); /* search for struct trap by number or name */
        !           214: void   trapsig ARGS((int sig)); /* trap signal handler */
        !           215: 
        !           216: /*
        !           217:  * fast character classes
        !           218:  */
        !           219: #define        C_ALPHA 0x01            /* a-z_A-Z */
        !           220: #define        C_DIGIT 0x02            /* 0-9 */
        !           221: #define        C_LEX1  0x04            /* \0 \t\n|&;<>() */
        !           222: #define        C_VAR1  0x08            /* *@#!$-? */
        !           223: #define        C_SUBOP 0x40            /* "=-+?#%" */
        !           224: #define        C_IFS   0x80            /* $IFS */
        !           225: 
        !           226: extern char ctypes [];
        !           227: void   initctypes ARGS((void));
        !           228: void   setctypes ARGS((Const char*, int type));
        !           229: 
        !           230: #define        ctype(c, t)     !!(ctypes[(unsigned char)(c)]&(t))
        !           231: #define        letter(c)       ctype(c, C_ALPHA)
        !           232: #define        digit(c)        ctype(c, C_DIGIT)
        !           233: #define        letnum(c)       ctype(c, C_ALPHA|C_DIGIT)
        !           234: 
        !           235: #ifndef _IOFBF
        !           236: #define        _IOFBF  000000
        !           237: #endif
        !           238: 
        !           239: /*
        !           240:  * Compatibility constants and declarations
        !           241:  */
        !           242: #if COHERENT
        !           243: #define        tms             tbuffer         /* for calls to times() */
        !           244: #define        tms_utime       tb_utime
        !           245: #define        tms_stime       tb_stime
        !           246: #define        tms_cutime      tb_cutime
        !           247: #define        tms_cstime      tb_cstime
        !           248: #define        setvbuf(fp,buf,type,size)       /* ignore for now */
        !           249: typedef        long            clock_t;
        !           250: #define        remove(fn)      unlink(fn)
        !           251: #endif
        !           252: 
        !           253: #ifndef        MAILINTERVAL
        !           254: #define        MAILINTERVAL    60              /* interval between MAIL checks */
        !           255: #endif

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