File: init.c

package info (click to toggle)
mawk 1.3.3-17
  • links: PTS, VCS
  • area: main
  • in suites: buster, jessie, jessie-kfreebsd, stretch, wheezy
  • size: 1,484 kB
  • ctags: 1,506
  • sloc: ansic: 13,008; yacc: 994; awk: 629; makefile: 113; sh: 107
file content (388 lines) | stat: -rw-r--r-- 7,949 bytes parent folder | download | duplicates (7)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388

/********************************************
init.c
copyright 1991, Michael D. Brennan

This is a source file for mawk, an implementation of
the AWK programming language.

Mawk is distributed without warranty under the terms of
the GNU General Public License, version 2, 1991.
********************************************/


/* $Log: init.c,v $
 * Revision 1.11  1995/08/20  17:35:21  mike
 * include <stdlib.h> for MSC, needed for environ decl
 *
 * Revision 1.10  1995/06/09  22:51:50  mike
 * silently exit(0) if no program
 *
 * Revision 1.9  1995/06/06  00:18:30  mike
 * change mawk_exit(1) to mawk_exit(2)
 *
 * Revision 1.8  1994/12/14  14:40:34  mike
 * -Wi option
 *
 * Revision 1.7  1994/12/11  22:43:20  mike
 * don't assume **environ is writable
 *
 * Revision 1.6  1994/12/11  22:14:16  mike
 * remove THINK_C #defines.  Not a political statement, just no indication
 * that anyone ever used it.
 *
 * Revision 1.5  1994/10/08  19:15:45  mike
 * remove SM_DOS
 *
 * Revision 1.4  1994/03/11  02:23:49  mike
 * -We option
 *
 * Revision 1.3  1993/07/17  00:45:14  mike
 * indent
 *
 * Revision 1.2	 1993/07/04  12:52:00  mike
 * start on autoconfig changes
 *
 * Revision 5.5	 1993/01/07  02:50:33  mike
 * relative vs absolute code
 *
 * Revision 5.4	 1992/12/24  01:58:19  mike
 * 1.1.2d changes for MsDOS
 *
 * Revision 5.3	 1992/07/10  16:17:10  brennan
 * MsDOS: remove NO_BINMODE macro
 *
 * Revision 5.2	 1992/01/09  08:46:14  brennan
 * small change for MSC
 *
 * Revision 5.1	 91/12/05  07:56:07  brennan
 * 1.1 pre-release
 *
*/


/* init.c */
#include "mawk.h"
#include "code.h"
#include "memory.h"
#include "symtype.h"
#include "init.h"
#include "bi_vars.h"
#include "field.h"

#ifdef MSDOS
#include <fcntl.h>
#ifdef MSDOS_MSC
#include <stdlib.h>
#endif
#endif

static void PROTO(process_cmdline, (int, char **)) ;
static void PROTO(set_ARGV, (int, char **, int)) ;
static void PROTO(bad_option, (char *)) ;
static void PROTO(no_program, (void)) ;

extern void PROTO(print_version, (void)) ;
extern int PROTO(is_cmdline_assign, (char *)) ;

#if  MSDOS
void PROTO(stdout_init, (void)) ;
#if  HAVE_REARGV
void PROTO(reargv, (int *, char ***)) ;
#endif
#endif

char *progname ;
short interactive_flag = 0 ;

#ifndef	 SET_PROGNAME
#define	 SET_PROGNAME() \
   {char *p = strrchr(argv[0],'/') ;\
    progname = p ? p+1 : argv[0] ; }
#endif

void
initialize(argc, argv)
int argc ; char **argv ;
{

   SET_PROGNAME() ;

   bi_vars_init() ;		 /* load the builtin variables */
   bi_funct_init() ;		 /* load the builtin functions */
   kw_init() ;			 /* load the keywords */
   field_init() ;

#if   MSDOS
   {
      char *p = getenv("MAWKBINMODE") ;

      if (p)  set_binmode(atoi(p)) ;
   }
#endif


   process_cmdline(argc, argv) ;

   code_init() ;
   fpe_init() ;
   set_stderr() ;

#if  MSDOS
   stdout_init() ;
#endif
}

int dump_code_flag ;		 /* if on dump internal code */
short posix_space_flag ;

#ifdef	 DEBUG
int dump_RE ;			 /* if on dump compiled REs  */
#endif


static void
bad_option(s)
   char *s ;
{
   errmsg(0, "not an option: %s", s) ; mawk_exit(2) ; 
}

static void
no_program()
{
   mawk_exit(0) ;
}

static void
process_cmdline(argc, argv)
   int argc ;
   char **argv ;
{
   int i, nextarg ;
   char *optarg ;
   PFILE dummy ;		 /* starts linked list of filenames */
   PFILE *tail = &dummy ;

   for (i = 1; i < argc && argv[i][0] == '-'; i = nextarg)
   {
      if (argv[i][1] == 0)	/* -  alone */
      {
	 if (!pfile_name) no_program() ;
	 break ;		 /* the for loop */
      }
      /* safe to look at argv[i][2] */

      if (argv[i][2] == 0)
      {
	 if (i == argc - 1 && argv[i][1] != '-')
	 {
	    if (strchr("WFvf", argv[i][1]))
	    {
	       errmsg(0, "option %s lacks argument", argv[i]) ;
	       mawk_exit(2) ;
	    }
	    bad_option(argv[i]) ;
	 }

	 optarg = argv[i + 1] ;
	 nextarg = i + 2 ;
      }
      else  /* argument glued to option */
      {
	 optarg = &argv[i][2] ;
	 nextarg = i + 1 ;
      }

      switch (argv[i][1])
      {
	 case 'W':

	    if (optarg[0] >= 'a' && optarg[0] <= 'z')
	       optarg[0] += 'A' - 'a' ;
	    if (optarg[0] == 'V')  print_version() ;
	    else if (optarg[0] == 'D')
	    {
	       dump_code_flag = 1 ;
	    }
	    else if (optarg[0] == 'S')
	    {
	       char *p = strchr(optarg, '=') ;
	       int x = p ? atoi(p + 1) : 0 ;

	       if (x > SPRINTF_SZ)
	       {
		  sprintf_buff = (char *) zmalloc(x) ;
		  sprintf_limit = sprintf_buff + x ;
	       }
	    }
#if  MSDOS
	    else if (optarg[0] == 'B')
	    {
	       char *p = strchr(optarg, '=') ;
	       int x = p ? atoi(p + 1) : 0 ;

	       set_binmode(x) ;
	    }
#endif
	    else if (optarg[0] == 'P')
	    {
	       posix_space_flag = 1 ;
	    }
	    else if (optarg[0] == 'E')
	    {
	       if ( pfile_name )
	       {
		  errmsg(0, "-W exec is incompatible with -f") ;
		  mawk_exit(2) ;
	       }
	       else if ( nextarg == argc ) no_program() ;

	       pfile_name = argv[nextarg] ;
	       i = nextarg + 1 ;
	       goto no_more_opts ;
	    }
	    else if (optarg[0] == 'I')
	    {
	       interactive_flag = 1 ;
	       setbuf(stdout,(char*)0) ;
	    }
	    else  errmsg(0, "vacuous option: -W %s", optarg) ;


	    break ;

	 case 'v':
	    if (!is_cmdline_assign(optarg))
	    {
	       errmsg(0, "improper assignment: -v %s", optarg) ;
	       mawk_exit(2) ;
	    }
	    break ;

	 case 'F':

	    rm_escape(optarg) ;	 /* recognize escape sequences */
	    cell_destroy(FS) ;
	    FS->type = C_STRING ;
	    FS->ptr = (PTR) new_STRING(optarg) ;
	    cast_for_split(cellcpy(&fs_shadow, FS)) ;
	    break ;

	 case '-':
	    if (argv[i][2] != 0)  bad_option(argv[i]) ;
	    i++ ;
	    goto no_more_opts ;

	 case 'f':
	    /* first file goes in pfile_name ; any more go
	       on a list */
	    if (!pfile_name)  pfile_name = optarg ;
	    else
	    {
	       tail = tail->link = ZMALLOC(PFILE) ;
	       tail->fname = optarg ;
	    }
	    break ;

	 default:
	    bad_option(argv[i]) ;
      }
   }

 no_more_opts:

   tail->link = (PFILE *) 0 ;
   pfile_list = dummy.link ;

   if (pfile_name)
   {
      set_ARGV(argc, argv, i) ;
      scan_init((char *) 0) ;
   }
   else	 /* program on command line */
   {
      if (i == argc)  no_program() ;
      set_ARGV(argc, argv, i + 1) ;

#if  MSDOS && ! HAVE_REARGV	/* reversed quotes */
      {
	 char *p ;

	 for (p = argv[i]; *p; p++)
	    if (*p == '\'')  *p = '\"' ;
      }
#endif
      scan_init(argv[i]) ;
/* #endif  */
   }
}


static void
set_ARGV(argc, argv, i)
int argc ; char **argv ;
   int i ;			 /* argv[i] = ARGV[i] */
{
   SYMTAB *st_p ;
   CELL argi ;
   register CELL *cp ;

   st_p = insert("ARGV") ;
   st_p->type = ST_ARRAY ;
   Argv = st_p->stval.array = new_ARRAY() ;
   argi.type = C_DOUBLE ;
   argi.dval = 0.0 ;
   cp = array_find(st_p->stval.array, &argi, CREATE) ;
   cp->type = C_STRING ;
   cp->ptr = (PTR) new_STRING(progname) ;

   /* ARGV[0] is set, do the rest
     The type of ARGV[1] ... should be C_MBSTRN
     because the user might enter numbers from the command line */

   for (argi.dval = 1.0; i < argc; i++, argi.dval += 1.0)
   {
      cp = array_find(st_p->stval.array, &argi, CREATE) ;
      cp->type = C_MBSTRN ;
      cp->ptr = (PTR) new_STRING(argv[i]) ;
   }
   ARGC->type = C_DOUBLE ;
   ARGC->dval = argi.dval ;
}


/*----- ENVIRON ----------*/

void
load_environ(ENV)
   ARRAY ENV ;
{
   CELL c ;
#ifndef	 MSDOS_MSC		/* MSC declares it near */
   extern char **environ ;
#endif
   register char **p = environ ; /* walks environ */
   char *s ;			 /* looks for the '=' */
   CELL *cp ;			 /* pts at ENV[&c] */

   c.type = C_STRING ;

   while (*p)
   {
      if (s = strchr(*p, '='))	/* shouldn't fail */
      {
	 int len = s - *p ;
	 c.ptr = (PTR) new_STRING0(len) ;
	 memcpy(string(&c)->str, *p, len) ;
	 s++ ;

	 cp = array_find(ENV, &c, CREATE) ;
	 cp->type = C_MBSTRN ;
	 cp->ptr = (PTR) new_STRING(s) ;

	 free_STRING(string(&c)) ;
      }
      p++ ;
   }
}