[f40a309] | 1 | /*
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| 2 | ============================================================================
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| 3 | croot.c -- Root for Buchla 700 C programs
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| 4 | Version 8 -- 1987-06-29 -- D.N. Lynx Crowe
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| 5 |
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| 6 | This version can be setup for I/O redirection or not, depending on the
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| 7 | value of REDIRECT. If redirection is supported, so are command line
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| 8 | arguments, which must be passed to Croot() at 'cp' by the startup code.
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| 9 |
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| 10 | Normally, this won't be selected, as this is a dedicated application
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| 11 | that doesn't expect command line arguments or I/O redirection.
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| 12 | ============================================================================
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| 13 | */
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| 14 |
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| 15 | #define ROOTMSG "{Buchla 700 Croot - Version 8 - 1987-06-29}"
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| 16 |
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[b28a12e] | 17 | #include "ram.h"
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[f40a309] | 18 |
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| 19 | #define REDIRECT 0 /* non-zero for command line stuff */
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| 20 |
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| 21 | #define MAXARGS 30 /* maximum number of command line arguments */
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| 22 |
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[0170798] | 23 | void (*_clsall)(void);
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[f40a309] | 24 |
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| 25 | /* |
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| 26 |
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| 27 | */
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[7258c6a] | 28 |
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| 29 | static int16_t Argc;
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[f40a309] | 30 | static int8_t *Argv[MAXARGS];
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| 31 |
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| 32 | /* |
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| 33 |
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| 34 | */
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| 35 |
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[5f714c9] | 36 | /*
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[f40a309] | 37 | ============================================================================
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| 38 | exit() -- return control to the BIOS
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| 39 | ============================================================================
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[0580615] | 40 | */
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[f40a309] | 41 |
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| 42 | void exit(void)
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[ee49131] | 43 | {
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[f40a309] | 44 | (*_clsall)(); /* close all open files */
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| 45 | xtrap15(); /* return to the BIOS */
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| 46 | }
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| 47 |
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| 48 |
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| 49 | #if REDIRECT
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| 50 |
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| 51 | /*
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| 52 | ============================================================================
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| 53 | _eredir(name) -- output I/O redirection error message to stderr
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| 54 | ============================================================================
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| 55 | */
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| 56 |
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| 57 | static
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| 58 | _eredir(name)
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| 59 | char *name;
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| 60 | {
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| 61 | char buff[200];
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| 62 |
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| 63 | strcpy(buff, "Can't open file for redirection: ");
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| 64 | strcat(buff, name);
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[5f714c9] | 65 | strcat(buff, "\n");
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[f40a309] | 66 | write(2, buff, strlen(buff));
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| 67 | exit();
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| 68 | }
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| 69 |
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| 70 | #endif
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| 71 |
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| 72 | /* |
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| 73 |
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| 74 | */
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| 75 |
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| 76 | /*
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| 77 | ============================================================================
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| 78 | Croot(cp) -- C root module for the Buchla 700
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[7258c6a] | 79 | ============================================================================
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[f40a309] | 80 | */
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[7258c6a] | 81 |
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| 82 | void Croot(int8_t *cp)
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[f40a309] | 83 | {
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| 84 | register int8_t *fname;
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| 85 | register int16_t k;
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| 86 |
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| 87 | Argv[0] = ROOTMSG;
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| 88 | Argc = 1;
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| 89 |
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| 90 | _clsall = _fd_cls;
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| 91 | InitFS();
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| 92 |
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| 93 | #if REDIRECT
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| 94 |
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| 95 | while (Argc < MAXARGS) { /* handle command line arguments */
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| 96 |
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| 97 | while (*cp EQ ' ' OR *cp EQ '\t') /* skip whitespace */
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| 98 | ++cp;
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| 99 |
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| 100 | if (*cp EQ 0) /* check for end of line */
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| 101 | break;
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| 102 |
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| 103 | if (*cp EQ '>') { /* > - redirect output */
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| 104 |
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| 105 | k = 1; /* stdout */
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| 106 | goto redir;
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| 107 |
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| 108 | } else if (*cp EQ '<') { /* < - redirect input */
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| 109 |
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| 110 | k = 0; /* stdin */
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| 111 | redir:
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| 112 | while (*++cp EQ ' ' OR *cp EQ '\t') /* skip whitespace */
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| 113 | ;
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| 114 |
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| 115 | fname = cp; /* pointer to start of name */
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| 116 |
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| 117 | while (*++cp) /* skip to whitespace */
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| 118 | if (*cp EQ ' ' OR *cp EQ '\t') {
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| 119 |
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| 120 | *cp++ = 0;
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| 121 | break;
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| 122 | }
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| 123 |
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| 124 | close(k); /* close old assignment */
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| 125 |
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| 126 | if (k)
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| 127 | k = creat(fname, 0666); /* stdout */
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| 128 | else
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| 129 | k = open(fname, O_RDONLY); /* stdin */
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| 130 |
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| 131 | if (k EQ -1)
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| 132 | _eredir(fname);
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| 133 |
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| 134 | } else { /* collect a command line argument */
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| 135 |
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| 136 | Argv[Argc++] = cp;
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| 137 |
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| 138 | while (*++cp) /* find end of argument */
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| 139 | if (*cp EQ ' ' OR *cp EQ '\t') {
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| 140 |
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| 141 | *cp++ = 0;
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| 142 | break;
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| 143 | }
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| 144 | }
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| 145 | }
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[e225e77] | 146 |
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[5f714c9] | 147 | #endif
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[f40a309] | 148 |
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[6262b5c] | 149 | main(); /* call application */
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| 150 | exit(); /* exit in case the application didn't */
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| 151 | }
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| 152 |
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