| 1 | /* main.c 4.1 82/05/07 */ |
| 2 | |
| 3 | #include "stdio.h" |
| 4 | #include "ctype.h" |
| 5 | #include "awk.def" |
| 6 | #include "awk.h" |
| 7 | #define TOLOWER(c) (isupper(c) ? tolower(c) : c) /* ugh!!! */ |
| 8 | |
| 9 | int dbg = 0; |
| 10 | int svflg = 0; |
| 11 | int rstflg = 0; |
| 12 | int svargc; |
| 13 | char **svargv, **xargv; |
| 14 | extern FILE *yyin; /* lex input file */ |
| 15 | char *lexprog; /* points to program argument if it exists */ |
| 16 | extern errorflag; /* non-zero if any syntax errors; set by yyerror */ |
| 17 | |
| 18 | int filefd, symnum, ansfd; |
| 19 | char *filelist; |
| 20 | extern int maxsym, errno; |
| 21 | main(argc, argv) int argc; char *argv[]; { |
| 22 | if (argc == 1) |
| 23 | error(FATAL, "Usage: awk [-f source | 'cmds'] [files]"); |
| 24 | if (strcmp(argv[0], "a.out")) |
| 25 | logit(argc, argv); |
| 26 | syminit(); |
| 27 | while (argc > 1) { |
| 28 | argc--; |
| 29 | argv++; |
| 30 | /* this nonsense is because gcos argument handling */ |
| 31 | /* folds -F into -f. accordingly, one checks the next |
| 32 | /* character after f to see if it's -f file or -Fx. |
| 33 | */ |
| 34 | if (argv[0][0] == '-' && TOLOWER(argv[0][1]) == 'f' && argv[0][2] == '\0') { |
| 35 | yyin = fopen(argv[1], "r"); |
| 36 | if (yyin == NULL) |
| 37 | error(FATAL, "can't open %s", argv[1]); |
| 38 | argc--; |
| 39 | argv++; |
| 40 | break; |
| 41 | } else if (argv[0][0] == '-' && TOLOWER(argv[0][1]) == 'f') { /* set field sep */ |
| 42 | if (argv[0][2] == 't') /* special case for tab */ |
| 43 | **FS = '\t'; |
| 44 | else |
| 45 | **FS = argv[0][2]; |
| 46 | continue; |
| 47 | } else if (argv[0][0] != '-') { |
| 48 | dprintf("cmds=|%s|\n", argv[0], NULL, NULL); |
| 49 | yyin = NULL; |
| 50 | lexprog = argv[0]; |
| 51 | argv[0] = argv[-1]; /* need this space */ |
| 52 | break; |
| 53 | } else if (strcmp("-d", argv[0])==0) { |
| 54 | dbg = 1; |
| 55 | } |
| 56 | else if(strcmp("-S", argv[0]) == 0) { |
| 57 | svflg = 1; |
| 58 | } |
| 59 | else if(strncmp("-R", argv[0], 2) == 0) { |
| 60 | if(thaw(argv[0] + 2) == 0) |
| 61 | rstflg = 1; |
| 62 | else { |
| 63 | fprintf(stderr, "not restored\n"); |
| 64 | exit(1); |
| 65 | } |
| 66 | } |
| 67 | } |
| 68 | if (argc <= 1) { |
| 69 | argv[0][0] = '-'; |
| 70 | argv[0][1] = '\0'; |
| 71 | argc++; |
| 72 | argv--; |
| 73 | } |
| 74 | svargc = --argc; |
| 75 | svargv = ++argv; |
| 76 | dprintf("svargc=%d svargv[0]=%s\n", svargc, svargv[0], NULL); |
| 77 | *FILENAME = *svargv; /* initial file name */ |
| 78 | if(rstflg == 0) |
| 79 | yyparse(); |
| 80 | dprintf("errorflag=%d\n", errorflag, NULL, NULL); |
| 81 | if (errorflag) |
| 82 | exit(errorflag); |
| 83 | if(svflg) { |
| 84 | svflg = 0; |
| 85 | if(freeze("awk.out") != 0) |
| 86 | fprintf(stderr, "not saved\n"); |
| 87 | exit(0); |
| 88 | } |
| 89 | run(); |
| 90 | exit(errorflag); |
| 91 | } |
| 92 | |
| 93 | logit(n, s) char *s[]; |
| 94 | { int i, tvec[2]; |
| 95 | FILE *f, *g; |
| 96 | char buf[512]; |
| 97 | if ((f=fopen("/crp/pjw/awkhist/awkhist", "a"))==NULL) |
| 98 | return; |
| 99 | time(tvec); |
| 100 | fprintf(f, "%-8s %s", getlogin(), ctime(tvec)); |
| 101 | for (i=0; i<n; i++) |
| 102 | fprintf(f, "'%s'", s[i]); |
| 103 | putc('\n', f); |
| 104 | if (strcmp(s[1], "-f")) { |
| 105 | fclose(f); |
| 106 | return; |
| 107 | } |
| 108 | if ((g=fopen(s[2], "r"))==NULL) { |
| 109 | fclose(f); |
| 110 | return; |
| 111 | } |
| 112 | while ((i=fread(buf, 1, 512, g))>0) |
| 113 | fwrite(buf, 1, i, f); |
| 114 | fclose(f); |
| 115 | fclose(g); |
| 116 | } |
| 117 | |
| 118 | yywrap() |
| 119 | { |
| 120 | return(1); |
| 121 | } |