Return to system.c CVS log

Up to [CSRG BSD Unix] / 43BSDReno / usr.bin / tn3270 / distribution / sys_dos

Annotation of 43BSDReno/usr.bin/tn3270/distribution/sys_dos/system.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1988 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  */
        !            17: 
        !            18: #ifndef lint
        !            19: static char sccsid[] = "@(#)system.c   4.1 (Berkeley) 12/4/88";
        !            20: #endif /* not lint */
        !            21: 
        !            22: #include <stdio.h>
        !            23: 
        !            24: #include "../general/general.h"
        !            25: #include "../ctlr/api.h"
        !            26: #include "spint.h"
        !            27: 
        !            28: #include "../general/globals.h"
        !            29: 
        !            30: 
        !            31: static Spint spinted;
        !            32: static char command[256];
        !            33: static int need_to_start = 0;
        !            34: 
        !            35: /*
        !            36:  * shell_continue() actually runs the command, and looks for API
        !            37:  * requests coming back in.
        !            38:  *
        !            39:  * We are called from the main loop in telnet.c.
        !            40:  */
        !            41: 
        !            42: int
        !            43: shell_continue()
        !            44: {
        !            45:     /*
        !            46:      * spint_start() returns when either the command has finished, or when
        !            47:      * the required interrupt comes in.  In the latter case, the appropriate
        !            48:      * thing to do is to process the interrupt, and then return to
        !            49:      * the interrupt issuer by calling spint_continue().
        !            50:      */
        !            51:     if (need_to_start) {
        !            52:        need_to_start = 0;
        !            53:        spint_start(command, &spinted);
        !            54:     }
        !            55: 
        !            56:     if (spinted.done == 0) {
        !            57:        /* Process request */
        !            58:        handle_api(&spinted.regs, &spinted.sregs);
        !            59:        spint_continue(&spinted);
        !            60:     } else {
        !            61:        char inputbuffer[100];
        !            62: 
        !            63:        if (spinted.rc != 0) {
        !            64:            fprintf(stderr, "Process generated a return code of 0x%x.\n",
        !            65:                                                                spinted.rc);
        !            66:        }
        !            67:        printf("[Hit return to continue]");
        !            68:        fflush(stdout);
        !            69:        (void) gets(inputbuffer);
        !            70:        shell_active = 0;
        !            71:        setconnmode();
        !            72:        ConnectScreen();
        !            73:     }
        !            74:     return shell_active;
        !            75: }
        !            76: 
        !            77: 
        !            78: /*
        !            79:  * Called from telnet.c to fork a lower command.com.  We
        !            80:  * use the spint... routines so that we can pick up
        !            81:  * interrupts generated by application programs.
        !            82:  */
        !            83: 
        !            84: 
        !            85: int
        !            86: shell(argc,argv)
        !            87: int    argc;
        !            88: char   *argv[];
        !            89: {
        !            90: 
        !            91:     ClearElement(spinted);
        !            92:     spinted.int_no = API_INTERRUPT_NUMBER;
        !            93:     if (argc == 1) {
        !            94:        command[0] = 0;
        !            95:     } else {
        !            96:        char *cmdptr;
        !            97:        int length;
        !            98: 
        !            99:        argc--;
        !           100:        argv++;
        !           101:        strcpy(command, " /c");
        !           102:        cmdptr = command+strlen(command);
        !           103:        while (argc) {
        !           104:            if ((cmdptr+strlen(*argv)) >= (command+sizeof command)) {
        !           105:                fprintf(stderr, "Argument list too long at argument *%s*.\n",
        !           106:                            *argv);
        !           107:                return 0;
        !           108:            }
        !           109:            *cmdptr++ = ' ';            /* Blank separators */
        !           110:            strcpy(cmdptr, *argv);
        !           111:            cmdptr += strlen(cmdptr);
        !           112:            argc--;
        !           113:            argv++;
        !           114:        }
        !           115:        length = strlen(command)-1;
        !           116:        if (length < 0) {
        !           117:            length = 0;
        !           118:        }
        !           119:        command[0] = length;
        !           120:     }
        !           121:     need_to_start = 1;
        !           122:     shell_active = 1;
        !           123:     return 1;                  /* Go back to main loop */
        !           124: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.