projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| d74a6b29 SL |
1 | #ifndef lint |
| 2 | static char sccsid[] = "@(#)main.c 1.1 (Berkeley) %G%"; | |
| 3 | #endif | |
| 4 | /* | |
| 5 | * adb - main command loop and error/interrupt handling | |
| 6 | */ | |
| 7 | #include "defs.h" | |
| 8 | ||
| 9 | MSG NOEOR; | |
| 10 | ||
| 11 | INT mkfault; | |
| 12 | INT executing; | |
| 13 | INT infile; | |
| 14 | CHAR *lp; | |
| 15 | L_INT maxpos; | |
| 16 | SIG sigint; | |
| 17 | SIG sigqit; | |
| 18 | INT wtflag; | |
| 19 | L_INT maxfile; | |
| 20 | STRING errflg; | |
| 21 | L_INT exitflg; | |
| 22 | ||
| 23 | CHAR lastc; | |
| 24 | INT eof; | |
| 25 | ||
| 26 | INT lastcom; | |
| 27 | ||
| 28 | ADDR maxoff = MAXOFF; | |
| 29 | L_INT maxpos = MAXPOS; | |
| 30 | char *Ipath = "/usr/lib/adb"; | |
| 31 | ||
| 32 | main(argc, argv) | |
| 33 | register char **argv; | |
| 34 | int argc; | |
| 35 | { | |
| 36 | ||
| 37 | mkioptab(); | |
| 38 | another: | |
| 39 | if (argc>1) { | |
| 40 | if (eqstr("-w", argv[1])) { | |
| 41 | wtflag = 2; /* suitable for open() */ | |
| 42 | argc--, argv++; | |
| 43 | goto another; | |
| 44 | } | |
| 45 | if (eqstr("-k", argv[1])) { | |
| 46 | kernel = 1; | |
| 47 | argc--, argv++; | |
| 48 | goto another; | |
| 49 | } | |
| 50 | if (argv[1][0] == '-' && argv[1][1] == 'I') { | |
| 51 | Ipath = argv[1]+2; | |
| 52 | argc--, argv++; | |
| 53 | } | |
| 54 | } | |
| 55 | if (argc > 1) | |
| 56 | symfil = argv[1]; | |
| 57 | if (argc > 2) | |
| 58 | corfil = argv[2]; | |
| 59 | xargc = argc; | |
| 60 | setsym(); setcor(); setvar(); | |
| 61 | ||
| 62 | if ((sigint=signal(SIGINT,SIG_IGN)) != SIG_IGN) { | |
| 63 | sigint = fault; | |
| 64 | signal(SIGINT, fault); | |
| 65 | } | |
| 66 | sigqit = signal(SIGQUIT, SIG_IGN); | |
| 67 | setexit(); | |
| 68 | if (executing) | |
| 69 | delbp(); | |
| 70 | executing = 0; | |
| 71 | for (;;) { | |
| 72 | flushbuf(); | |
| 73 | if (errflg) { | |
| 74 | printf("%s\n", errflg); | |
| 75 | exitflg = 1; | |
| 76 | errflg = 0; | |
| 77 | } | |
| 78 | if (mkfault) { | |
| 79 | mkfault=0; | |
| 80 | printc('\n'); | |
| 81 | printf(DBNAME); | |
| 82 | } | |
| 83 | lp=0; rdc(); lp--; | |
| 84 | if (eof) { | |
| 85 | if (infile) { | |
| 86 | iclose(-1, 0); eof=0; reset(); | |
| 87 | } else | |
| 88 | done(); | |
| 89 | } else | |
| 90 | exitflg = 0; | |
| 91 | command(0, lastcom); | |
| 92 | if (lp && lastc!='\n') | |
| 93 | error(NOEOR); | |
| 94 | } | |
| 95 | } | |
| 96 | ||
| 97 | done() | |
| 98 | { | |
| 99 | endpcs(); | |
| 100 | exit(exitflg); | |
| 101 | } | |
| 102 | ||
| 103 | L_INT | |
| 104 | round(a,b) | |
| 105 | REG L_INT a, b; | |
| 106 | { | |
| 107 | REG L_INT w; | |
| 108 | w = (a/b)*b; | |
| 109 | IF a!=w THEN w += b; FI | |
| 110 | return(w); | |
| 111 | } | |
| 112 | ||
| 113 | /* | |
| 114 | * If there has been an error or a fault, take the error. | |
| 115 | */ | |
| 116 | chkerr() | |
| 117 | { | |
| 118 | if (errflg || mkfault) | |
| 119 | error(errflg); | |
| 120 | } | |
| 121 | ||
| 122 | /* | |
| 123 | * An error occurred; save the message for later printing, | |
| 124 | * close open files, and reset to main command loop. | |
| 125 | */ | |
| 126 | error(n) | |
| 127 | char *n; | |
| 128 | { | |
| 129 | errflg = n; | |
| 130 | iclose(0, 1); oclose(); | |
| 131 | reset(); | |
| 132 | } | |
| 133 | ||
| 134 | /* | |
| 135 | * An interrupt occurred; reset the interrupt | |
| 136 | * catch, seek to the end of the current file | |
| 137 | * and remember that there was a fault. | |
| 138 | */ | |
| 139 | fault(a) | |
| 140 | { | |
| 141 | signal(a, fault); | |
| 142 | lseek(infile, 0L, 2); | |
| 143 | mkfault++; | |
| 144 | } |