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90a429fa KM |
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 | } |