summaryrefslogtreecommitdiff
path: root/usr.bin/make/util.c
blob: 26a6b7554cd469da3c2438ab31a1dffba6a3f2a0 (plain)
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
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
/*	$OpenPackages$ */
/*	$OpenBSD: util.c,v 1.21 2003/06/25 15:11:06 millert Exp $	*/
/*	$NetBSD: util.c,v 1.10 1996/12/31 17:56:04 christos Exp $	*/

/*
 * Copyright (c) 2001 Marc Espie.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OPENBSD
 * PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 * Missing stuff from OS's
 */

#include <sys/param.h>
#include <stdio.h>
#include "config.h"
#include "defines.h"

#ifdef sun

extern int errno, sys_nerr;
extern char *sys_errlist[];

char *
strerror(e)
    int e;
{
    static char buf[100];
    if (e < 0 || e >= sys_nerr) {
	snprintf(buf, sizeof buf, "Unknown error %d", e);
	return buf;
    }
    else
	return sys_errlist[e];
}
#endif

#ifdef ultrix
#include <string.h>

/* strdup
 *
 * Make a duplicate of a string.
 * For systems which lack this function.
 */
char *
strdup(str)
    const char *str;
{
    size_t len;
    char *p;

    if (str == NULL)
	return NULL;
    len = strlen(str) + 1;
    if ((p = malloc(len)) == NULL)
	return NULL;

    return memcpy(p, str, len);
}

#endif

#if defined(sun) || defined(__hpux) || defined(__sgi)

int
setenv(name, value, dum)
    const char *name;
    const char *value;
    int dum;
{
    char *p;
    int len = strlen(name) + strlen(value) + 2; /* = \0 */
    char *ptr = (char*)malloc(len);

    if (ptr == NULL)
	return -1;

    p = ptr;

    while (*name)
	*p++ = *name++;

    *p++ = '=';

    while (*value)
	*p++ = *value++;

    *p = '\0';

    len = putenv(ptr);
/*    free(ptr); */
    return len;
}
#endif

#ifdef __hpux
#include <sys/types.h>
#include <sys/param.h>
#include <sys/syscall.h>
#include <sys/signal.h>
#include <sys/stat.h>
#include <stdio.h>
#include <dirent.h>
#include <sys/time.h>
#include <time.h>
#include <unistd.h>


int
killpg(pid, sig)
    int pid, sig;
{
    return kill(-pid, sig);
}

void
srandom(seed)
    long seed;
{
    srand48(seed);
}

long
random()
{
    return lrand48();
}

/* turn into bsd signals */
void (*
signal(s, a))()
    int     s;
    void (*a)();
{
    struct sigvec osv, sv;

    (void)sigvector(s, (struct sigvec *)0, &osv);
    sv = osv;
    sv.sv_handler = a;
#ifdef SV_BSDSIG
    sv.sv_flags = SV_BSDSIG;
#endif

    if (sigvector(s, &sv, (struct sigvec *)0) == -1)
	return SIG_ERR;
    return osv.sv_handler;
}

#if !defined(BSD) && !defined(d_fileno)
# define d_fileno d_ino
#endif

#ifndef DEV_DEV_COMPARE
# define DEV_DEV_COMPARE(a, b) ((a) == (b))
#endif
#define ISDOT(c) ((c)[0] == '.' && ((c)[1] == '\0' || (c)[1] == '/'))
#define ISDOTDOT(c) ((c)[0] == '.' && ISDOT(&((c)[1])))


/* strrcpy():
 *	Like strcpy, going backwards and returning the new pointer
 */
static char *
strrcpy(ptr, str)
    char *ptr, *str;
{
    size_t len = strlen(str);

    while (len)
	*--ptr = str[--len];

    return ptr;
} /* end strrcpy */


char   *
getwd(pathname)
    char   *pathname;
{
    DIR    *dp;
    struct dirent *d;
    extern int errno;

    struct stat st_root, st_cur, st_next, st_dotdot;
    char    pathbuf[MAXPATHLEN], nextpathbuf[MAXPATHLEN * 2];
    char   *pathptr, *nextpathptr, *cur_name_add;

    /* find the inode of root */
    if (stat("/", &st_root) == -1) {
	(void)snprintf(pathname, MAXPATHLEN, 
	    "getwd: Cannot stat \"/\" (%s)", strerror(errno));
	return NULL;
    }
    pathbuf[MAXPATHLEN - 1] = '\0';
    pathptr = &pathbuf[MAXPATHLEN - 1];
    nextpathbuf[MAXPATHLEN - 1] = '\0';
    cur_name_add = nextpathptr = &nextpathbuf[MAXPATHLEN - 1];

    /* find the inode of the current directory */
    if (lstat(".", &st_cur) == -1) {
	(void)snprintf(pathname, MAXPATHLEN,
	    "getwd: Cannot stat \".\" (%s)", strerror(errno));
	return NULL;
    }
    nextpathptr = strrcpy(nextpathptr, "../");

    /* Descend to root */
    for (;;) {

	/* look if we found root yet */
	if (st_cur.st_ino == st_root.st_ino &&
	    DEV_DEV_COMPARE(st_cur.st_dev, st_root.st_dev)) {
	    (void)strlcpy(pathname, *pathptr != '/' ? "/" : pathptr, MAXPATHLEN);
	    return pathname;
	}

	/* open the parent directory */
	if (stat(nextpathptr, &st_dotdot) == -1) {
	    (void)snprintf(pathname, MAXPATHLEN,
		"getwd: Cannot stat directory \"%s\" (%s)",
		nextpathptr, strerror(errno));
	    return NULL;
	}
	if ((dp = opendir(nextpathptr)) == NULL) {
	    (void)snprintf(pathname, MAXPATHLEN,
		"getwd: Cannot open directory \"%s\" (%s)",
		nextpathptr, strerror(errno));
	    return NULL;
	}

	/* look in the parent for the entry with the same inode */
	if (DEV_DEV_COMPARE(st_dotdot.st_dev, st_cur.st_dev)) {
	    /* Parent has same device. No need to stat every member */
	    for (d = readdir(dp); d != NULL; d = readdir(dp))
		if (d->d_fileno == st_cur.st_ino)
		    break;
	}
	else {
	    /*
	     * Parent has a different device. This is a mount point so we
	     * need to stat every member
	     */
	    for (d = readdir(dp); d != NULL; d = readdir(dp)) {
		if (ISDOT(d->d_name) || ISDOTDOT(d->d_name))
		    continue;
		(void)strlcpy(cur_name_add, d->d_name, 
		    sizeof(nextpathbuf) MAXPATHLEN - (MAXPATHLEN - 1));
		if (lstat(nextpathptr, &st_next) == -1) {
		    (void)snprintf(pathname, MAXPATHLEN,
			"getwd: Cannot stat \"%s\" (%s)",
			d->d_name, strerror(errno));
		    (void)closedir(dp);
		    return NULL;
		}
		/* check if we found it yet */
		if (st_next.st_ino == st_cur.st_ino &&
		    DEV_DEV_COMPARE(st_next.st_dev, st_cur.st_dev))
		    break;
	    }
	}
	if (d == NULL) {
	    (void)snprintf(pathname, MAXPATHLEN,
		"getwd: Cannot find \".\" in \"..\"");
	    (void)closedir(dp);
	    return NULL;
	}
	st_cur = st_dotdot;
	pathptr = strrcpy(pathptr, d->d_name);
	pathptr = strrcpy(pathptr, "/");
	nextpathptr = strrcpy(nextpathptr, "../");
	(void)closedir(dp);
	*cur_name_add = '\0';
    }
} /* end getwd */


char	*sys_siglist[] = {
	"Signal 0",
	"Hangup",			/* SIGHUP    */
	"Interrupt",			/* SIGINT    */
	"Quit", 			/* SIGQUIT   */
	"Illegal instruction",		/* SIGILL    */
	"Trace/BPT trap",		/* SIGTRAP   */
	"IOT trap",			/* SIGIOT    */
	"EMT trap",			/* SIGEMT    */
	"Floating point exception",	/* SIGFPE    */
	"Killed",			/* SIGKILL   */
	"Bus error",			/* SIGBUS    */
	"Segmentation fault",		/* SIGSEGV   */
	"Bad system call",		/* SIGSYS    */
	"Broken pipe",			/* SIGPIPE   */
	"Alarm clock",			/* SIGALRM   */
	"Terminated",			/* SIGTERM   */
	"User defined signal 1",	/* SIGUSR1   */
	"User defined signal 2",	/* SIGUSR2   */
	"Child exited", 		/* SIGCLD    */
	"Power-fail restart",		/* SIGPWR    */
	"Virtual timer expired",	/* SIGVTALRM */
	"Profiling timer expired",	/* SIGPROF   */
	"I/O possible", 		/* SIGIO     */
	"Window size changes",		/* SIGWINDOW */
	"Stopped (signal)",		/* SIGSTOP   */
	"Stopped",			/* SIGTSTP   */
	"Continued",			/* SIGCONT   */
	"Stopped (tty input)",		/* SIGTTIN   */
	"Stopped (tty output)", 	/* SIGTTOU   */
	"Urgent I/O condition", 	/* SIGURG    */
	"Remote lock lost (NFS)",	/* SIGLOST   */
	"Signal 31",			/* reserved  */
	"DIL signal"			/* SIGDIL    */
};

int
utimes(file, tvp)
    char *file;
    struct timeval tvp[2];
{
    struct utimbuf t;

    t.actime  = tvp[0].tv_sec;
    t.modtime = tvp[1].tv_sec;
    return utime(file, &t);
}


#endif /* __hpux */

#if defined(sun) && defined(__svr4__)
#include <signal.h>

/* turn into bsd signals */
void (*
signal(s, a))()
    int     s;
    void (*a)();
{
    struct sigaction sa, osa;

    memset(&sa, 0, sizeof sa);
    sa.sa_handler = a;
    sigemptyset(&sa.sa_mask);
    sa.sa_flags = SA_RESTART;

    if (sigaction(s, &sa, &osa) == -1)
	return SIG_ERR;
    else
	return osa.sa_handler;
}

#endif

#ifndef BSD4_4
#include <stdarg.h>

#ifdef _IOSTRG
#define STRFLAG (_IOSTRG|_IOWRT)	/* no _IOWRT: avoid stdio bug */
#else
#define STRFLAG (_IOREAD)		/* XXX: Assume svr4 stdio */
#endif

int
vsnprintf(s, n, fmt, args)
	char *s;
	size_t n;
	const char *fmt;
	va_list args;
{
	FILE fakebuf;

	fakebuf._flag = STRFLAG;
	/*
	 * Some os's are char * _ptr, others are unsigned char *_ptr...
	 * We cast to void * to make everyone happy.
	 */
	fakebuf._ptr = (void *)s;
	fakebuf._cnt = n-1;
	fakebuf._file = -1;
	_doprnt(fmt, args, &fakebuf);
	fakebuf._cnt++;
	putc('\0', &fakebuf);
	if (fakebuf._cnt<0)
	    fakebuf._cnt = 0;
	return n-fakebuf._cnt-1;
}

int
snprintf(char *s, size_t n, const char *fmt, ...)
{
	va_list ap;
	int rv;

	va_start(ap, fmt);
	rv = vsnprintf(s, n, fmt, ap);
	va_end(ap);
	return rv;
}
#endif
#ifdef NEED_STRSTR
char *
strstr(string, substring)
	const char *string;		/* String to search. */
	const char *substring;		/* Substring to find in string */
{
	const char *a, *b;

	/*
	 * First scan quickly through the two strings looking for a single-
	 * character match.  When it's found, then compare the rest of the
	 * substring.
	 */

	for (b = substring; *string != 0; string += 1) {
		if (*string != *b)
			continue;
		a = string;
		for (;;) {
			if (*b == 0)
				return (char *)string;
			if (*a++ != *b++)
				break;
		}
		b = substring;
	}
	return NULL;
}
#endif

#ifdef NEED_FGETLN
char *
fgetln(stream, len)
    FILE *stream;
    size_t *len;
{
    static char *buffer = NULL;
    static size_t buflen = 0;

    if (buflen == 0) {
	buflen = 512;
	buffer = emalloc(buflen+1);
    }
    if (fgets(buffer, buflen+1, stream) == NULL)
	return NULL;
    *len = strlen(buffer);
    while (*len == buflen && buffer[*len-1] != '\n') {
	buffer = erealloc(buffer, 2*buflen + 1);
	if (fgets(buffer + buflen, buflen + 1, stream) == NULL)
	    return NULL;
	*len += strlen(buffer + buflen);
	buflen *= 2;
    }
    return buffer;
}
#endif