projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| a049c340 BJ |
1 | static char sccsid[] = "@(#)main.c 4.1 %G%"; |
| 2 | /* | |
| 3 | * adb - main command loop and error/interrupt handling | |
| 4 | */ | |
| 5 | #include "defs.h" | |
| 6 | ||
| 7 | MSG NOEOR; | |
| 8 | ||
| 9 | INT mkfault; | |
| 10 | INT executing; | |
| 11 | INT infile; | |
| 12 | CHAR *lp; | |
| 13 | L_INT maxoff; | |
| 14 | L_INT maxpos; | |
| 15 | ADDR sigint; | |
| 16 | ADDR sigqit; | |
| 17 | INT wtflag; | |
| 18 | L_INT maxfile; | |
| 19 | STRING errflg; | |
| 20 | L_INT exitflg; | |
| 21 | ||
| 22 | CHAR lastc; | |
| 23 | INT eof; | |
| 24 | ||
| 25 | INT lastcom; | |
| 26 | ||
| 27 | long maxoff = MAXOFF; | |
| 28 | long maxpos = MAXPOS; | |
| 29 | char *Ipath = "/usr/lib/adb"; | |
| 30 | ||
| 31 | main(argc, argv) | |
| 32 | register char **argv; | |
| 33 | int argc; | |
| 34 | { | |
| 35 | ||
| 36 | mkioptab(); | |
| 37 | another: | |
| 38 | if (argc>1) { | |
| 39 | if (eqstr("-w", argv[1])) { | |
| 40 | wtflag = 2; /* suitable for open() */ | |
| 41 | argc--, argv++; | |
| 42 | goto another; | |
| 43 | } | |
| 44 | if (argv[1][0] == '-' && argv[1][1] == 'I') { | |
| 45 | Ipath = argv[1]+2; | |
| 46 | argc--, argv++; | |
| 47 | } | |
| 48 | } | |
| 49 | if (argc > 1) | |
| 50 | symfil = argv[1]; | |
| 51 | if (argc > 2) | |
| 52 | corfil = argv[2]; | |
| 53 | xargc = argc; | |
| 54 | setsym(); setcor(); setvar(); | |
| 55 | ||
| 56 | if ((sigint=signal(SIGINT,SIG_IGN)) != SIG_IGN) { | |
| 57 | sigint = fault; | |
| 58 | signal(SIGINT, fault); | |
| 59 | } | |
| 60 | sigqit = signal(SIGQUIT, SIG_IGN); | |
| 61 | setexit(); | |
| 62 | if (executing) | |
| 63 | delbp(); | |
| 64 | executing = 0; | |
| 65 | for (;;) { | |
| 66 | flushbuf(); | |
| 67 | if (errflg) { | |
| 68 | printf("%s\n", errflg); | |
| 69 | exitflg = errflg; | |
| 70 | errflg = 0; | |
| 71 | } | |
| 72 | if (mkfault) { | |
| 73 | mkfault=0; | |
| 74 | printc('\n'); | |
| 75 | prints(DBNAME); | |
| 76 | } | |
| 77 | lp=0; rdc(); lp--; | |
| 78 | if (eof) { | |
| 79 | if (infile) { | |
| 80 | iclose(-1, 0); eof=0; reset(); | |
| 81 | } else | |
| 82 | done(); | |
| 83 | } else | |
| 84 | exitflg = 0; | |
| 85 | command(0, lastcom); | |
| 86 | if (lp && lastc!='\n') | |
| 87 | error(NOEOR); | |
| 88 | } | |
| 89 | } | |
| 90 | ||
| 91 | done() | |
| 92 | { | |
| 93 | endpcs(); | |
| 94 | exit(exitflg); | |
| 95 | } | |
| 96 | ||
| 97 | L_INT | |
| 98 | round(a,b) | |
| 99 | REG L_INT a, b; | |
| 100 | { | |
| 101 | REG L_INT w; | |
| 102 | w = (a/b)*b; | |
| 103 | IF a!=w THEN w += b; FI | |
| 104 | return(w); | |
| 105 | } | |
| 106 | ||
| 107 | /* | |
| 108 | * If there has been an error or a fault, take the error. | |
| 109 | */ | |
| 110 | chkerr() | |
| 111 | { | |
| 112 | if (errflg || mkfault) | |
| 113 | error(errflg); | |
| 114 | } | |
| 115 | ||
| 116 | /* | |
| 117 | * An error occurred; save the message for later printing, | |
| 118 | * close open files, and reset to main command loop. | |
| 119 | */ | |
| 120 | error(n) | |
| 121 | char *n; | |
| 122 | { | |
| 123 | errflg = n; | |
| 124 | iclose(0, 1); oclose(); | |
| 125 | reset(); | |
| 126 | } | |
| 127 | ||
| 128 | /* | |
| 129 | * An interrupt occurred; reset the interrupt | |
| 130 | * catch, seek to the end of the current file | |
| 131 | * and remember that there was a fault. | |
| 132 | */ | |
| 133 | fault(a) | |
| 134 | { | |
| 135 | signal(a, fault); | |
| 136 | lseek(infile, 0L, 2); | |
| 137 | mkfault++; | |
| 138 | } |