File: jam.c

package info (click to toggle)
ftjam 2.3.5-1
  • links: PTS
  • area: main
  • in suites: woody
  • size: 800 kB
  • ctags: 1,022
  • sloc: ansic: 7,951; yacc: 365; sh: 95; makefile: 57
file content (360 lines) | stat: -rw-r--r-- 8,446 bytes parent folder | download | duplicates (2)
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
/*
 * /+\
 * +\	Copyright 1993, 2000 Christopher Seiwald.
 * \+/
 *
 * This file is part of jam.
 *
 * License is hereby granted to use this software and distribute it
 * freely, as long as this copyright notice is retained and modifications 
 * are clearly marked.
 *
 * ALL WARRANTIES ARE HEREBY DISCLAIMED.
 */

/*
 * jam.c - make redux
 *
 * See Jam.html and Jamlang.html for usage information.
 *
 * These comments document the code.
 *
 * The top half of the code is structured such:
 *
 *                       jam 
 *                      / | \ 
 *                 +---+  |  \
 *                /       |   \ 
 *         jamgram     option  \ 
 *        /  |   \              \
 *       /   |    \              \
 *      /    |     \             |
 *  scan     |     compile      make
 *   |       |    /    \       / |  \
 *   |       |   /      \     /  |   \
 *   |       |  /        \   /   |    \
 * jambase parse         rules  search make1
 *                               |	|   \
 *                               |	|    \
 *                               |	|     \
 *                           timestamp command execute
 *
 *
 * The support routines are called by all of the above, but themselves
 * are layered thus:
 *
 *                     variable|expand
 *                      /  |   |   |
 *                     /   |   |   |
 *                    /    |   |   |
 *                 lists   |   |   filesys
 *                    \    |   |
 *                     \   |   |
 *                      \  |   |
 *                     newstr  |
 *                        \    |
 *                         \   |
 *                          \  |
 *                          hash
 *
 * Roughly, the modules are:
 *
 *	command.c - maintain lists of commands
 *	compile.c - compile parsed jam statements
 *	execunix.c - execute a shell script on UNIX
 *	execvms.c - execute a shell script, ala VMS
 *	expand.c - expand a buffer, given variable values
 *	fileunix.c - manipulate file names and scan directories on UNIX
 *	filevms.c - manipulate file names and scan directories on VMS
 *  fileos2.c - manipulate file names and scan directories on OS/2
 *  filent.c - manipulate file names and scan directories on Windows
 *	hash.c - simple in-memory hashing routines 
 *  hdrmacro.c - handle header file parsing for filename macro definitions
 *	headers.c - handle #includes in source files
 *	jambase.c - compilable copy of Jambase
 *	jamgram.y - jam grammar
 *	lists.c - maintain lists of strings
 *	make.c - bring a target up to date, once rules are in place
 *	make1.c - execute command to bring targets up to date
 *	newstr.c - string manipulation routines
 *	option.c - command line option processing
 *	parse.c - make and destroy parse trees as driven by the parser
 *	regexp.c - Henry Spencer's regexp
 *	rules.c - access to RULEs, TARGETs, and ACTIONs
 *	scan.c - the jam yacc scanner
 *	search.c - find a target along $(SEARCH) or $(LOCATE) 
 *	timestamp.c - get the timestamp of a file or archive member
 *	variable.c - handle jam multi-element variables
 *
 * 05/04/94 (seiwald) - async multiprocess (-j) support
 * 02/08/95 (seiwald) - -n implies -d2.
 * 02/22/95 (seiwald) - -v for version info.
 * 09/11/00 (seiwald) - PATCHLEVEL folded into VERSION.
 */

# include "jam.h"
# include "option.h"
# include "patchlevel.h"

/* These get various function declarations. */

# include "lists.h"
# include "parse.h"
# include "variable.h"
# include "compile.h"
# include "rules.h"
# include "newstr.h"
# include "scan.h"
# include "timestamp.h"
# include "make.h"

/* Macintosh is "special" */

# ifdef OS_MAC
# include <QuickDraw.h>
# endif

/* And UNIX for this */

# ifdef unix
# include <sys/utsname.h>
# endif

struct globs globs = {
	0,			/* noexec */
	1,			/* jobs */
# ifdef OS_MAC
	{ 0, 0 },		/* debug - suppress tracing output */
# else
	{ 0, 1 }, 		/* debug ... */
# endif
	0			/* output commands, not run them */
} ;

/* Symbols to be defined as true for use in Jambase */

static char *othersyms[] = { OSMAJOR, OSMINOR, OSPLAT, JAMVERSYM, 0 } ;

/* Known for sure: 
 *	mac needs arg_enviro
 *	OS2 needs extern environ
 */

# ifdef OS_MAC
# define use_environ arg_environ
# ifdef MPW
QDGlobals qd;
# endif
# endif

/* on Win32-LCC */
# if defined( OS_NT ) && defined( __LCC__ )
#   define  use_environ _environ
# endif


# ifndef use_environ
# define use_environ environ
# if !defined( __WATCOM__ ) && !defined( OS_OS2 ) && !defined( OS_NT ) 
extern char **environ;
# endif
# endif


int  main( int argc, char **argv, char **arg_environ )
{
	int		n;
	char		*s;
	struct option	optv[N_OPTS];
	char		*all = "all";
	int		anyhow = 0;
	int		status;

# ifdef OS_MAC
	InitGraf(&qd.thePort);
# endif

	argc--, argv++;

	if( ( n = getoptions( argc, argv, "d:j:f:s:t:ano:v", optv ) ) < 0 )
	{
	    printf( "\nusage: jam [ options ] targets...\n\n" );

            printf( "-a      Build all targets, even if they are current.\n" );
            printf( "-dx     Set the debug level to x (0-9).\n" );
            printf( "-fx     Read x instead of Jambase.\n" );
            printf( "-jx     Run up to x shell commands concurrently.\n" );
            printf( "-n      Don't actually execute the updating actions.\n" );
            printf( "-ox     Write the updating actions to file x.\n" );
	    printf( "-sx=y   Set variable x=y, overriding environment.\n" );
            printf( "-tx     Rebuild x, even if it is up-to-date.\n" );
            printf( "-v      Print the version of jam and exit.\n\n" );

	    exit( EXITBAD );
	}

	argc -= n, argv += n;

	/* Version info. */

	if( ( s = getoptval( optv, 'v', 0 ) ) )
	{
	    printf( "Jam/MR  " );
	    printf( "Version %s.  ", VERSION );
	    printf( "Copyright 1993, 2000 Christopher Seiwald.  " );
	    printf( "%s.\n", OSMINOR );

	    return EXITOK;
	}

	/* Pick up interesting options */

	if( ( s = getoptval( optv, 'n', 0 ) ) )
	    globs.noexec++, globs.debug[2] = 1;

	if( ( s = getoptval( optv, 'a', 0 ) ) )
	    anyhow++;

	if( ( s = getoptval( optv, 'j', 0 ) ) )
	    globs.jobs = atoi( s );

	/* Turn on/off debugging */

	for( n = 0; s = getoptval( optv, 'd', n ); n++ )
	{
	    int i;

	    /* First -d, turn off defaults. */

	    if( !n )
		for( i = 0; i < DEBUG_MAX; i++ )
		    globs.debug[i] = 0;

	    i = atoi( s );

	    if( i < 0 || i >= DEBUG_MAX )
	    {
		printf( "Invalid debug level '%s'.\n", s );
		continue;
	    }

	    /* n turns on levels 1-n */
	    /* +n turns on level n */

	    if( *s == '+' )
		globs.debug[i] = 1;
	    else while( i )
		globs.debug[i--] = 1;
	}

	/* Set JAMDATE first */

	{
	    char *date;
	    time_t clock;
	    time( &clock );
	    date = newstr( ctime( &clock ) );

	    /* Trim newline from date */

	    if( strlen( date ) == 25 )
		date[ 24 ] = 0;

	    var_set( "JAMDATE", list_new( L0, newstr( date ) ), VAR_SET );
	}

	/* And JAMUNAME */
# ifdef unix
	{
	    struct utsname u;

	    if( uname( &u ) >= 0 )
	    {
		var_set( "JAMUNAME", 
			list_new( 
			list_new(
			list_new(
			list_new(
			list_new( L0, 
				newstr( u.sysname ) ),
				newstr( u.nodename ) ),
				newstr( u.release ) ),
				newstr( u.version ) ),
				newstr( u.machine ) ), VAR_SET );
	    }
	}
# endif /* unix */

	/*
	 * Jam defined variables OS, OSPLAT
	 */

	var_defines( othersyms );

	/* load up environment variables */

	var_defines( use_environ );

	/* Load up variables set on command line. */

	for( n = 0; s = getoptval( optv, 's', n ); n++ )
	{
	    char *symv[2];
	    symv[0] = s;
	    symv[1] = 0;
	    var_defines( symv );
	}

	/* Initialize builtins */


	compile_builtins();

	/* Parse ruleset */

	for( n = 0; s = getoptval( optv, 'f', n ); n++ )
	    parse_file( s );

	if( !n )
	    parse_file( "+" );

	status = yyanyerrors();

	/* Manually touch -t targets */

	for( n = 0; s = getoptval( optv, 't', n ); n++ )
	    touchtarget( s );

	/* If an output file is specified, set globs.cmdout to that */

	if( s = getoptval( optv, 'o', 0 ) )
	{
	    if( !( globs.cmdout = fopen( s, "w" ) ) )
	    {
		printf( "Failed to write to '%s'\n", s );
		exit( EXITBAD );
	    }
	    globs.noexec++;
	}

	/* Now make target */

	if( !argc )
	    status |= make( 1, &all, anyhow );
	else
	    status |= make( argc, argv, anyhow );

	/* Widely scattered cleanup */

	var_done();
	donerules();
	donestamps();
	donestr();

	/* close cmdout */

	if( globs.cmdout )
	    fclose( globs.cmdout );

	return status ? EXITBAD : EXITOK;
}