Annotation of src/usr.bin/awk/main.c, Revision 1.22
1.22 ! millert 1: /* $OpenBSD: main.c,v 1.21 2017/10/09 14:51:31 deraadt 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:
1.22 ! millert 26: const char *version = "version 20121220";
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>
1.18 doug 35: #include <unistd.h>
1.1 tholo 36: #include "awk.h"
1.4 kstailey 37: #include "ytab.h"
1.1 tholo 38:
39: extern char **environ;
40: extern int nfields;
1.6 millert 41: extern char *__progname;
1.1 tholo 42:
43: int dbg = 0;
1.17 millert 44: Awkfloat srand_seed = 1;
1.1 tholo 45: char *cmdname; /* gets argv[0] for error messages */
46: extern FILE *yyin; /* lex input file */
47: char *lexprog; /* points to program argument if it exists */
48: extern int errorflag; /* non-zero if any syntax errors; set by yyerror */
49: int compile_time = 2; /* for error printing: */
50: /* 2 = cmdline, 1 = compile, 0 = running */
51:
1.15 millert 52: #define MAX_PFILE 20 /* max number of -f's */
53:
1.8 millert 54: char *pfile[MAX_PFILE]; /* program filenames from -f's */
1.1 tholo 55: int npfile = 0; /* number of filenames */
56: int curpfile = 0; /* current filename */
57:
1.4 kstailey 58: int safe = 0; /* 1 => "safe" mode */
59:
1.1 tholo 60: int main(int argc, char *argv[])
61: {
1.12 millert 62: const char *fs = NULL;
1.2 tholo 63:
1.19 deraadt 64: setlocale(LC_ALL, "");
65: setlocale(LC_NUMERIC, "C"); /* for parsing cmdline & prog */
66:
1.20 tb 67: cmdname = __progname;
1.18 doug 68: if (pledge("stdio rpath wpath cpath proc exec", NULL) == -1) {
69: fprintf(stderr, "%s: pledge: incorrect arguments\n",
70: cmdname);
71: exit(1);
72: }
73:
1.1 tholo 74: if (argc == 1) {
1.14 jmc 75: fprintf(stderr, "usage: %s [-safe] [-V] [-d[n]] [-F fs] "
76: "[-v var=value] [prog | -f progfile]\n\tfile ...\n",
1.10 aaron 77: cmdname);
1.1 tholo 78: exit(1);
79: }
80: signal(SIGFPE, fpecatch);
1.17 millert 81:
1.1 tholo 82: yyin = NULL;
83: symtab = makesymtab(NSYMTAB);
84: while (argc > 1 && argv[1][0] == '-' && argv[1][1] != '\0') {
1.4 kstailey 85: if (strcmp(argv[1], "--") == 0) { /* explicit end of args */
1.1 tholo 86: argc--;
87: argv++;
88: break;
89: }
90: switch (argv[1][1]) {
1.4 kstailey 91: case 's':
92: if (strcmp(argv[1], "-safe") == 0)
93: safe = 1;
94: break;
1.1 tholo 95: case 'f': /* next argument is program filename */
1.17 millert 96: if (argv[1][2] != 0) { /* arg is -fsomething */
97: if (npfile >= MAX_PFILE - 1)
98: FATAL("too many -f options");
99: pfile[npfile++] = &argv[1][2];
100: } else { /* arg is -f something */
101: argc--; argv++;
102: if (argc <= 1)
103: FATAL("no program filename");
104: if (npfile >= MAX_PFILE - 1)
105: FATAL("too many -f options");
106: pfile[npfile++] = argv[1];
107: }
1.1 tholo 108: break;
109: case 'F': /* set field separator */
110: if (argv[1][2] != 0) { /* arg is -Fsomething */
111: if (argv[1][2] == 't' && argv[1][3] == 0) /* wart: t=>\t */
1.4 kstailey 112: fs = "\t";
1.1 tholo 113: else if (argv[1][2] != 0)
114: fs = &argv[1][2];
115: } else { /* arg is -F something */
116: argc--; argv++;
117: if (argc > 1 && argv[1][0] == 't' && argv[1][1] == 0) /* wart: t=>\t */
1.4 kstailey 118: fs = "\t";
1.1 tholo 119: else if (argc > 1 && argv[1][0] != 0)
120: fs = &argv[1][0];
121: }
122: if (fs == NULL || *fs == '\0')
1.9 millert 123: WARNING("field separator FS is empty");
1.1 tholo 124: break;
125: case 'v': /* -v a=1 to be done NOW. one -v for each */
1.17 millert 126: if (argv[1][2] != 0) { /* arg is -vsomething */
127: if (isclvar(&argv[1][2]))
128: setclvar(&argv[1][2]);
129: else
130: FATAL("invalid -v option argument: %s", &argv[1][2]);
131: } else { /* arg is -v something */
132: argc--; argv++;
133: if (argc <= 1)
134: FATAL("no variable name");
135: if (isclvar(argv[1]))
136: setclvar(argv[1]);
137: else
138: FATAL("invalid -v option argument: %s", argv[1]);
139: }
1.1 tholo 140: break;
141: case 'd':
142: dbg = atoi(&argv[1][2]);
143: if (dbg == 0)
144: dbg = 1;
145: printf("awk %s\n", version);
1.6 millert 146: break;
147: case 'V': /* added for exptools "standard" */
148: printf("awk %s\n", version);
149: exit(0);
1.1 tholo 150: break;
151: default:
1.9 millert 152: WARNING("unknown option %s ignored", argv[1]);
1.1 tholo 153: break;
154: }
155: argc--;
156: argv++;
157: }
1.18 doug 158:
159: if (safe) {
160: if (pledge("stdio rpath", NULL) == -1) {
161: fprintf(stderr, "%s: pledge: incorrect arguments\n",
162: cmdname);
163: exit(1);
164: }
165: }
166:
1.1 tholo 167: /* argv[1] is now the first argument */
168: if (npfile == 0) { /* no -f; first argument is program */
169: if (argc <= 1) {
170: if (dbg)
171: exit(0);
1.9 millert 172: FATAL("no program given");
1.1 tholo 173: }
1.21 deraadt 174: DPRINTF( ("program = |%s|\n", argv[1]) );
1.1 tholo 175: lexprog = argv[1];
176: argc--;
177: argv++;
178: }
179: recinit(recsize);
180: syminit();
181: compile_time = 1;
182: argv[0] = cmdname; /* put prog name at front of arglist */
1.21 deraadt 183: DPRINTF( ("argc=%d, argv[0]=%s\n", argc, argv[0]) );
1.1 tholo 184: arginit(argc, argv);
1.4 kstailey 185: if (!safe)
186: envinit(environ);
1.1 tholo 187: yyparse();
1.13 millert 188: setlocale(LC_NUMERIC, ""); /* back to whatever it is locally */
1.1 tholo 189: if (fs)
1.4 kstailey 190: *FS = qstring(fs, '\0');
1.21 deraadt 191: DPRINTF( ("errorflag=%d\n", errorflag) );
1.1 tholo 192: if (errorflag == 0) {
193: compile_time = 0;
194: run(winner);
195: } else
196: bracecheck();
197: return(errorflag);
198: }
199:
200: int pgetc(void) /* get 1 character from awk program */
201: {
202: int c;
203:
204: for (;;) {
205: if (yyin == NULL) {
206: if (curpfile >= npfile)
207: return EOF;
1.4 kstailey 208: if (strcmp(pfile[curpfile], "-") == 0)
1.1 tholo 209: yyin = stdin;
1.4 kstailey 210: else if ((yyin = fopen(pfile[curpfile], "r")) == NULL)
1.9 millert 211: FATAL("can't open file %s", pfile[curpfile]);
1.7 millert 212: lineno = 1;
1.1 tholo 213: }
214: if ((c = getc(yyin)) != EOF)
215: return c;
216: if (yyin != stdin)
217: fclose(yyin);
218: yyin = NULL;
219: curpfile++;
220: }
1.7 millert 221: }
222:
223: char *cursource(void) /* current source file name */
224: {
225: if (npfile > 0)
226: return pfile[curpfile];
227: else
228: return NULL;
1.1 tholo 229: }
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