Annotation of src/usr.bin/awk/main.c, Revision 1.6
1.6 ! millert 1: /* $OpenBSD: main.c,v 1.5 1998/03/03 01:56:01 angelos Exp $ */
1.1 tholo 2: /****************************************************************
1.4 kstailey 3: Copyright (C) Lucent Technologies 1997
1.1 tholo 4: All Rights Reserved
5:
6: Permission to use, copy, modify, and distribute this software and
7: its documentation for any purpose and without fee is hereby
8: granted, provided that the above copyright notice appear in all
9: copies and that both that the copyright notice and this
10: permission notice and warranty disclaimer appear in supporting
1.4 kstailey 11: documentation, and that the name Lucent Technologies or any of
12: its entities not be used in advertising or publicity pertaining
13: to distribution of the software without specific, written prior
14: permission.
15:
16: LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
17: INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
18: IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
19: SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
20: WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
21: IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
22: ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
23: THIS SOFTWARE.
1.1 tholo 24: ****************************************************************/
25:
1.6 ! millert 26: char *version = "version 990305";
1.1 tholo 27:
28: #define DEBUG
29: #include <stdio.h>
30: #include <ctype.h>
1.3 millert 31: #include <locale.h>
1.1 tholo 32: #include <stdlib.h>
33: #include <string.h>
34: #include <signal.h>
35: #include "awk.h"
1.4 kstailey 36: #include "ytab.h"
1.1 tholo 37:
38: extern char **environ;
39: extern int nfields;
1.6 ! millert 40: extern char *__progname;
1.1 tholo 41:
42: int dbg = 0;
43: char *cmdname; /* gets argv[0] for error messages */
44: extern FILE *yyin; /* lex input file */
45: char *lexprog; /* points to program argument if it exists */
46: extern int errorflag; /* non-zero if any syntax errors; set by yyerror */
47: int compile_time = 2; /* for error printing: */
48: /* 2 = cmdline, 1 = compile, 0 = running */
49:
50: char *pfile[20]; /* program filenames from -f's */
51: int npfile = 0; /* number of filenames */
52: int curpfile = 0; /* current filename */
53:
1.4 kstailey 54: int safe = 0; /* 1 => "safe" mode */
55:
1.1 tholo 56: int main(int argc, char *argv[])
57: {
58: char *fs = NULL, *marg;
59: int temp;
1.2 tholo 60:
61: setlocale(LC_ALL, "");
1.1 tholo 62:
1.6 ! millert 63: cmdname = __progname;
1.1 tholo 64: if (argc == 1) {
1.5 angelos 65: fprintf(stderr, "Usage: %s [-f programfile | 'program'] [-Ffieldsep] [-v var=value] [-safe] [-mrn] [-mfn] [files]\n", cmdname);
1.1 tholo 66: exit(1);
67: }
68: signal(SIGFPE, fpecatch);
69: yyin = NULL;
70: symtab = makesymtab(NSYMTAB);
71: while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
1.4 kstailey 72: if (strcmp(argv[1], "--") == 0) { /* explicit end of args */
1.1 tholo 73: argc--;
74: argv++;
75: break;
76: }
77: switch (argv[1][1]) {
1.4 kstailey 78: case 's':
79: if (strcmp(argv[1], "-safe") == 0)
80: safe = 1;
81: break;
1.1 tholo 82: case 'f': /* next argument is program filename */
83: argc--;
84: argv++;
85: if (argc <= 1)
86: ERROR "no program filename" FATAL;
87: pfile[npfile++] = argv[1];
88: break;
89: case 'F': /* set field separator */
90: if (argv[1][2] != 0) { /* arg is -Fsomething */
91: if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */
1.4 kstailey 92: fs = "\t";
1.1 tholo 93: else if (argv[1][2] != 0)
94: fs = &argv[1][2];
95: } else { /* arg is -F something */
96: argc--; argv++;
97: if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */
1.4 kstailey 98: fs = "\t";
1.1 tholo 99: else if (argc > 1 && argv[1][0] != 0)
100: fs = &argv[1][0];
101: }
102: if (fs == NULL || *fs == '\0')
103: ERROR "field separator FS is empty" WARNING;
104: break;
105: case 'v': /* -v a=1 to be done NOW. one -v for each */
106: if (argv[1][2] == '\0' && --argc > 1 && isclvar((++argv)[1]))
107: setclvar(argv[1]);
108: break;
109: case 'm': /* more memory: -mr=record, -mf=fields */
1.4 kstailey 110: /* no longer needed */
1.1 tholo 111: marg = argv[1];
112: if (argv[1][3])
113: temp = atoi(&argv[1][3]);
114: else {
115: argv++; argc--;
116: temp = atoi(&argv[1][0]);
117: }
118: switch (marg[2]) {
119: case 'r': recsize = temp; break;
120: case 'f': nfields = temp; break;
121: default: ERROR "unknown option %s\n", marg FATAL;
122: }
123: break;
124: case 'd':
125: dbg = atoi(&argv[1][2]);
126: if (dbg == 0)
127: dbg = 1;
128: printf("awk %s\n", version);
1.6 ! millert 129: break;
! 130: case 'V': /* added for exptools "standard" */
! 131: printf("awk %s\n", version);
! 132: exit(0);
1.1 tholo 133: break;
134: default:
135: ERROR "unknown option %s ignored", argv[1] WARNING;
136: break;
137: }
138: argc--;
139: argv++;
140: }
141: /* argv[1] is now the first argument */
142: if (npfile == 0) { /* no -f; first argument is program */
143: if (argc <= 1) {
144: if (dbg)
145: exit(0);
146: ERROR "no program given" FATAL;
147: }
1.4 kstailey 148: dprintf( ("program = |%s|\n", argv[1]) );
1.1 tholo 149: lexprog = argv[1];
150: argc--;
151: argv++;
152: }
153: recinit(recsize);
154: syminit();
155: compile_time = 1;
156: argv[0] = cmdname; /* put prog name at front of arglist */
1.4 kstailey 157: dprintf( ("argc=%d, argv[0]=%s\n", argc, argv[0]) );
1.1 tholo 158: arginit(argc, argv);
1.4 kstailey 159: if (!safe)
160: envinit(environ);
1.1 tholo 161: yyparse();
162: if (fs)
1.4 kstailey 163: *FS = qstring(fs, '\0');
164: dprintf( ("errorflag=%d\n", errorflag) );
1.1 tholo 165: if (errorflag == 0) {
166: compile_time = 0;
167: run(winner);
168: } else
169: bracecheck();
170: return(errorflag);
171: }
172:
173: int pgetc(void) /* get 1 character from awk program */
174: {
175: int c;
176:
177: for (;;) {
178: if (yyin == NULL) {
179: if (curpfile >= npfile)
180: return EOF;
1.4 kstailey 181: if (strcmp(pfile[curpfile], "-") == 0)
1.1 tholo 182: yyin = stdin;
1.4 kstailey 183: else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
1.1 tholo 184: ERROR "can't open file %s", pfile[curpfile] FATAL;
185: }
186: if ((c = getc(yyin)) != EOF)
187: return c;
188: if (yyin != stdin)
189: fclose(yyin);
190: yyin = NULL;
191: curpfile++;
192: }
193: }
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