1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
23  * Use is subject to license terms.
24  */
25 
26 #pragma ident	"%Z%%M%	%I%	%E% SMI"
27 
28 #include <stdio.h>
29 #define	__EXTENSIONS__
30 #include <string.h>
31 #undef  __EXTENSIONS__
32 #include <signal.h>
33 #include <alloca.h>
34 #include <errno.h>
35 #include "libproc.h"
36 
37 static const char *
38 rawfltname(int flt)
39 {
40 	const char *name;
41 
42 	switch (flt) {
43 	case FLTILL:	name = "FLTILL";	break;
44 	case FLTPRIV:	name = "FLTPRIV";	break;
45 	case FLTBPT:	name = "FLTBPT";	break;
46 	case FLTTRACE:	name = "FLTTRACE";	break;
47 	case FLTACCESS:	name = "FLTACCESS";	break;
48 	case FLTBOUNDS:	name = "FLTBOUNDS";	break;
49 	case FLTIOVF:	name = "FLTIOVF";	break;
50 	case FLTIZDIV:	name = "FLTIZDIV";	break;
51 	case FLTFPE:	name = "FLTFPE";	break;
52 	case FLTSTACK:	name = "FLTSTACK";	break;
53 	case FLTPAGE:	name = "FLTPAGE";	break;
54 	case FLTWATCH:	name = "FLTWATCH";	break;
55 	case FLTCPCOVF:	name = "FLTCPCOVF";	break;
56 	default:	name = NULL;		break;
57 	}
58 
59 	return (name);
60 }
61 
62 /*
63  * Return the name of a fault.
64  * Manufacture a name for unknown fault.
65  */
66 char *
67 proc_fltname(int flt, char *buf, size_t bufsz)
68 {
69 	const char *name = rawfltname(flt);
70 	size_t len;
71 
72 	if (bufsz == 0)		/* force a program failure */
73 		return (NULL);
74 
75 	if (name != NULL) {
76 		len = strlen(name);
77 		(void) strncpy(buf, name, bufsz);
78 	} else {
79 		len = snprintf(buf, bufsz, "FLT#%d", flt);
80 	}
81 
82 	if (len >= bufsz)	/* ensure null-termination */
83 		buf[bufsz-1] = '\0';
84 
85 	return (buf);
86 }
87 
88 /*
89  * Return the name of a signal.
90  * Manufacture a name for unknown signal.
91  */
92 char *
93 proc_signame(int sig, char *buf, size_t bufsz)
94 {
95 	char name[SIG2STR_MAX+4];
96 	size_t len;
97 
98 	if (bufsz == 0)		/* force a program failure */
99 		return (NULL);
100 
101 	/* sig2str() omits the leading "SIG" */
102 	(void) strcpy(name, "SIG");
103 
104 	if (sig2str(sig, name+3) == 0) {
105 		len = strlen(name);
106 		(void) strncpy(buf, name, bufsz);
107 	} else {
108 		len = snprintf(buf, bufsz, "SIG#%d", sig);
109 	}
110 
111 	if (len >= bufsz)	/* ensure null-termination */
112 		buf[bufsz-1] = '\0';
113 
114 	return (buf);
115 }
116 
117 static const char *const systable[] = {
118 	NULL,			/*  0 */
119 	"_exit",		/*  1 */
120 	"forkall",		/*  2 */
121 	"read",			/*  3 */
122 	"write",		/*  4 */
123 	"open",			/*  5 */
124 	"close",		/*  6 */
125 	"wait",			/*  7 */
126 	"creat",		/*  8 */
127 	"link",			/*  9 */
128 	"unlink",		/* 10 */
129 	"exec",			/* 11 */
130 	"chdir",		/* 12 */
131 	"time",			/* 13 */
132 	"mknod",		/* 14 */
133 	"chmod",		/* 15 */
134 	"chown",		/* 16 */
135 	"brk",			/* 17 */
136 	"stat",			/* 18 */
137 	"lseek",		/* 19 */
138 	"getpid",		/* 20 */
139 	"mount",		/* 21 */
140 	"umount",		/* 22 */
141 	"setuid",		/* 23 */
142 	"getuid",		/* 24 */
143 	"stime",		/* 25 */
144 	"ptrace",		/* 26 */
145 	"alarm",		/* 27 */
146 	"fstat",		/* 28 */
147 	"pause",		/* 29 */
148 	"utime",		/* 30 */
149 	"stty",			/* 31 */
150 	"gtty",			/* 32 */
151 	"access",		/* 33 */
152 	"nice",			/* 34 */
153 	"statfs",		/* 35 */
154 	"sync",			/* 36 */
155 	"kill",			/* 37 */
156 	"fstatfs",		/* 38 */
157 	"pgrpsys",		/* 39 */
158 	"uucopystr",		/* 40 */
159 	"dup",			/* 41 */
160 	"pipe",			/* 42 */
161 	"times",		/* 43 */
162 	"profil",		/* 44 */
163 	"plock",		/* 45 */
164 	"setgid",		/* 46 */
165 	"getgid",		/* 47 */
166 	"signal",		/* 48 */
167 	"msgsys",		/* 49 */
168 	"sysi86",		/* 50 */
169 	"acct",			/* 51 */
170 	"shmsys",		/* 52 */
171 	"semsys",		/* 53 */
172 	"ioctl",		/* 54 */
173 	"uadmin",		/* 55 */
174 	NULL,			/* 56 */
175 	"utssys",		/* 57 */
176 	"fdsync",		/* 58 */
177 	"execve",		/* 59 */
178 	"umask",		/* 60 */
179 	"chroot",		/* 61 */
180 	"fcntl",		/* 62 */
181 	"ulimit",		/* 63 */
182 
183 	/* The following 6 entries were reserved for the UNIX PC */
184 	NULL,			/* 64 */
185 	NULL,			/* 65 */
186 	NULL,			/* 66 */
187 	NULL,			/* 67 */
188 	NULL,			/* 68 */
189 	NULL,			/* 69 */
190 
191 	"tasksys",		/* 70 */
192 	"acctctl",		/* 71 */
193 	"exacctsys",		/* 72 */
194 	"getpagesizes",		/* 73 */
195 	"rctlsys",		/* 74 */
196 	"issetugid",		/* 75 */
197 	"fsat",			/* 76 */
198 	"lwp_park",		/* 77 */
199 	"sendfilev",		/* 78 */
200 	"rmdir",		/* 79 */
201 	"mkdir",		/* 80 */
202 	"getdents",		/* 81 */
203 	"privsys",		/* 82 */
204 	"ucredsys",		/* 83 */
205 	"sysfs",		/* 84 */
206 	"getmsg",		/* 85 */
207 	"putmsg",		/* 86 */
208 	"poll",			/* 87 */
209 	"lstat",		/* 88 */
210 	"symlink",		/* 89 */
211 	"readlink",		/* 90 */
212 	"setgroups",		/* 91 */
213 	"getgroups",		/* 92 */
214 	"fchmod",		/* 93 */
215 	"fchown",		/* 94 */
216 	"sigprocmask",		/* 95 */
217 	"sigsuspend",		/* 96 */
218 	"sigaltstack",		/* 97 */
219 	"sigaction",		/* 98 */
220 	"sigpending",		/* 99 */
221 	"context",		/* 100 */
222 	"evsys",		/* 101 */
223 	"evtrapret",		/* 102 */
224 	"statvfs",		/* 103 */
225 	"fstatvfs",		/* 104 */
226 	"getloadavg",		/* 105 */
227 	"nfssys",		/* 106 */
228 	"waitid",		/* 107 */
229 	"sigsendsys",		/* 108 */
230 	"hrtsys",		/* 109 */
231 	"acancel",		/* 110 */
232 	"async",		/* 111 */
233 	"priocntlsys",		/* 112 */
234 	"pathconf",		/* 113 */
235 	"mincore",		/* 114 */
236 	"mmap",			/* 115 */
237 	"mprotect",		/* 116 */
238 	"munmap",		/* 117 */
239 	"fpathconf",		/* 118 */
240 	"vfork",		/* 119 */
241 	"fchdir",		/* 120 */
242 	"readv",		/* 121 */
243 	"writev",		/* 122 */
244 	"xstat",		/* 123 */
245 	"lxstat",		/* 124 */
246 	"fxstat",		/* 125 */
247 	"xmknod",		/* 126 */
248 	"NULL",			/* 127 */
249 	"setrlimit",		/* 128 */
250 	"getrlimit",		/* 129 */
251 	"lchown",		/* 130 */
252 	"memcntl",		/* 131 */
253 	"getpmsg",		/* 132 */
254 	"putpmsg",		/* 133 */
255 	"rename",		/* 134 */
256 	"uname",		/* 135 */
257 	"setegid",		/* 136 */
258 	"sysconfig",		/* 137 */
259 	"adjtime",		/* 138 */
260 	"systeminfo",		/* 139 */
261 	"sharefs",		/* 140 */
262 	"seteuid",		/* 141 */
263 	NULL,			/* 142 */
264 	"fork1",		/* 143 */
265 	"sigtimedwait",		/* 144 */
266 	"lwp_info",		/* 145 */
267 	"yield",		/* 146 */
268 	"lwp_sema_wait",	/* 147 */
269 	"lwp_sema_post",	/* 148 */
270 	"lwp_sema_trywait",	/* 149 */
271 	"lwp_detatch",		/* 150 */
272 	"corectl",		/* 151 */
273 	"modctl",		/* 152 */
274 	"fchroot",		/* 153 */
275 	"utimes",		/* 154 */
276 	"vhangup",		/* 155 */
277 	"gettimeofday",		/* 156 */
278 	"getitimer",		/* 157 */
279 	"setitimer",		/* 158 */
280 	"lwp_create",		/* 159 */
281 	"lwp_exit",		/* 160 */
282 	"lwp_suspend",		/* 161 */
283 	"lwp_continue",		/* 162 */
284 	"lwp_kill",		/* 163 */
285 	"lwp_self",		/* 164 */
286 	"lwp_sigmask",		/* 165 */
287 	"lwp_private",		/* 166 */
288 	"lwp_wait",		/* 167 */
289 	"lwp_mutex_wakeup",	/* 168 */
290 	"lwp_mutex_lock",	/* 169 */
291 	"lwp_cond_wait",	/* 170 */
292 	"lwp_cond_signal",	/* 171 */
293 	"lwp_cond_broadcast",	/* 172 */
294 	"pread",		/* 173 */
295 	"pwrite",		/* 174 */
296 	"llseek",		/* 175 */
297 	"inst_sync",		/* 176 */
298 	"brand",		/* 177 */
299 	"kaio",			/* 178 */
300 	"cpc",			/* 179 */
301 	"lgrpsys",		/* 180 */
302 	"rusagesys",		/* 181 */
303 	"portfs",		/* 182 */
304 	"pollsys",		/* 183 */
305 	NULL,			/* 184 */
306 	"acl",			/* 185 */
307 	"auditsys",		/* 186 */
308 	"processor_bind",	/* 187 */
309 	"processor_info",	/* 188 */
310 	"p_online",		/* 189 */
311 	"sigqueue",		/* 190 */
312 	"clock_gettime",	/* 191 */
313 	"clock_settime",	/* 192 */
314 	"clock_getres",		/* 193 */
315 	"timer_create",		/* 194 */
316 	"timer_delete",		/* 195 */
317 	"timer_settime",	/* 196 */
318 	"timer_gettime",	/* 197 */
319 	"timer_getoverrun",	/* 198 */
320 	"nanosleep",		/* 199 */
321 	"facl",			/* 200 */
322 	"door",			/* 201 */
323 	"setreuid",		/* 202 */
324 	"setregid",		/* 203 */
325 	"install_utrap",	/* 204 */
326 	"signotify",		/* 205 */
327 	"schedctl",		/* 206 */
328 	"pset",			/* 207 */
329 	"sparc_utrap_install",	/* 208 */
330 	"resolvepath",		/* 209 */
331 	"lwp_mutex_timedlock",	/* 210 */
332 	"lwp_sema_timedwait",	/* 211 */
333 	"lwp_rwlock_sys",	/* 212 */
334 	"getdents64",		/* 213 */
335 	"mmap64",		/* 214 */
336 	"stat64",		/* 215 */
337 	"lstat64",		/* 216 */
338 	"fstat64",		/* 217 */
339 	"statvfs64",		/* 218 */
340 	"fstatvfs64",		/* 219 */
341 	"setrlimit64",		/* 220 */
342 	"getrlimit64",		/* 221 */
343 	"pread64",		/* 222 */
344 	"pwrite64",		/* 223 */
345 	"creat64",		/* 224 */
346 	"open64",		/* 225 */
347 	"rpcmod",		/* 226 */
348 	"zone",			/* 227 */
349 	"autofssys",		/* 228 */
350 	"getcwd",		/* 229 */
351 	"so_socket",		/* 230 */
352 	"so_socketpair",	/* 231 */
353 	"bind",			/* 232 */
354 	"listen",		/* 233 */
355 	"accept",		/* 234 */
356 	"connect",		/* 235 */
357 	"shutdown",		/* 236 */
358 	"recv",			/* 237 */
359 	"recvfrom",		/* 238 */
360 	"recvmsg",		/* 239 */
361 	"send",			/* 240 */
362 	"sendmsg",		/* 241 */
363 	"sendto",		/* 242 */
364 	"getpeername",		/* 243 */
365 	"getsockname",		/* 244 */
366 	"getsockopt",		/* 245 */
367 	"setsockopt",		/* 246 */
368 	"sockconfig",		/* 247 */
369 	"ntp_gettime",		/* 248 */
370 	"ntp_adjtime",		/* 249 */
371 	"lwp_mutex_unlock",	/* 250 */
372 	"lwp_mutex_trylock",	/* 251 */
373 	"lwp_mutex_register",	/* 252 */
374 	"cladm",		/* 253 */
375 	"uucopy",		/* 254 */
376 	"umount2"		/* 255 */
377 };
378 
379 /* SYSEND == max syscall number + 1 */
380 #define	SYSEND	(sizeof (systable) / sizeof (systable[0]))
381 
382 /*
383  * Return the name of a system call.
384  * Manufacture a name for unknown system call.
385  */
386 char *
387 proc_sysname(int sys, char *buf, size_t bufsz)
388 {
389 	const char *name;
390 	size_t len;
391 
392 	if (bufsz == 0)		/* force a program failure */
393 		return (NULL);
394 
395 	if (sys >= 0 && sys < SYSEND)
396 		name = systable[sys];
397 	else
398 		name = NULL;
399 
400 	if (name != NULL) {
401 		len = strlen(name);
402 		(void) strncpy(buf, name, bufsz);
403 	} else {
404 		len = snprintf(buf, bufsz, "SYS#%d", sys);
405 	}
406 
407 	if (len >= bufsz)	/* ensure null-termination */
408 		buf[bufsz-1] = '\0';
409 
410 	return (buf);
411 }
412 
413 /*
414  * Convert a string representation of a fault to the corresponding number.
415  */
416 int
417 proc_str2flt(const char *str, int *fltnum)
418 {
419 	char *next;
420 	int i;
421 
422 	i = strtol(str, &next, 0);
423 	if (i > 0 && i <= PRMAXFAULT && *next == '\0') {
424 		*fltnum = i;
425 		return (0);
426 	}
427 
428 	for (i = 1; i <= PRMAXFAULT; i++) {
429 		const char *s = rawfltname(i);
430 
431 		if (s && (strcasecmp(s, str) == 0 ||
432 		    strcasecmp(s + 3, str) == 0)) {
433 			*fltnum = i;
434 			return (0);
435 		}
436 	}
437 
438 	return (-1);
439 }
440 
441 /*
442  * Convert a string representation of a signal to the signal number.  This
443  * functionality is already available in libc, but the interface doesn't
444  * optionally accept a "SIG" prefix.  We strip that first, and then call libc.
445  */
446 int
447 proc_str2sig(const char *str, int *signum)
448 {
449 	if (strncasecmp(str, "SIG", 3) == 0)
450 		str += 3; /* skip prefix */
451 
452 	return (str2sig(str, signum));
453 }
454 
455 /*
456  * Convert a string representation of a system call to the corresponding number.
457  * We do this by performing a simple linear search of the table above.
458  */
459 int
460 proc_str2sys(const char *str, int *sysnum)
461 {
462 	char *next;
463 	int i;
464 
465 	i = strtol(str, &next, 0);
466 	if (i > 0 && i <= PRMAXSYS && *next == '\0') {
467 		*sysnum = i;
468 		return (0);
469 	}
470 
471 	for (i = 1; i < SYSEND; i++) {
472 		if (systable[i] != NULL && strcmp(systable[i], str) == 0) {
473 			*sysnum = i;
474 			return (0);
475 		}
476 	}
477 
478 	return (-1);
479 }
480 
481 /*
482  * Convert a fltset_t to a string representation consisting of canonical
483  * machine fault names separated by the given delimeter string.  If
484  * m is non-zero (TRUE), set members are printed.  If m is zero (FALSE), set
485  * non-members are printed.  If the specified buf is too small to hold the
486  * complete formatted set, NULL is returned; otherwise buf is returned.
487  */
488 char *
489 proc_fltset2str(const fltset_t *set, const char *delim, int m,
490 	char *buf, size_t len)
491 {
492 	char name[FLT2STR_MAX], *p = buf;
493 	size_t n;
494 	int i;
495 
496 	if (buf == NULL || len < 1) {
497 		errno = EINVAL;
498 		return (NULL);
499 	}
500 
501 	buf[0] = '\0';  /* Set first byte to \0 */
502 
503 	for (i = 1; i <= PRMAXFAULT; i++) {
504 		if ((prismember(set, i) != 0) ^ (m == 0)) {
505 			(void) proc_fltname(i, name, sizeof (name));
506 
507 			if (buf[0] != '\0')
508 				n = snprintf(p, len, "%s%s", delim, name);
509 			else
510 				n = snprintf(p, len, "%s", name);
511 
512 			if (n != strlen(p)) {
513 				errno = ENAMETOOLONG; /* Output was truncated */
514 				return (NULL);
515 			}
516 			len -= n;
517 			p += n;
518 		}
519 	}
520 	return (buf);
521 }
522 
523 /*
524  * Convert a sigset_t to a string representation consisting of canonical signal
525  * names (without the SIG prefix). Parameters and return values analogous to
526  * proc_fltset2str().
527  */
528 char *
529 proc_sigset2str(const sigset_t *set, const char *delim, int m,
530 	char *buf, size_t len)
531 {
532 	char name[SIG2STR_MAX], *p = buf;
533 	size_t n;
534 	int i;
535 
536 	if (buf == NULL || len < 1) {
537 		errno = EINVAL;
538 		return (NULL);
539 	}
540 
541 	m = (m != 0);	/* Make sure m is 0 or 1 */
542 	buf[0] = '\0';	/* Set first byte to \0 */
543 
544 	/*
545 	 * Unlike proc_fltset2str() and proc_sysset2str(), we don't loop
546 	 * until i <= NSIG here, because sigismember() rejects i == NSIG.
547 	 */
548 	for (i = 1; i < NSIG; i++) {
549 		if (sigismember(set, i) == m) {
550 			(void) sig2str(i, name);
551 
552 			if (buf[0] != '\0')
553 				n = snprintf(p, len, "%s%s", delim, name);
554 			else
555 				n = snprintf(p, len, "%s", name);
556 
557 			if (n != strlen(p)) {
558 				errno = ENAMETOOLONG; /* Output was truncated */
559 				return (NULL);
560 			}
561 
562 			len -= n;
563 			p += n;
564 		}
565 	}
566 
567 	return (buf);
568 }
569 
570 /*
571  * Convert a sysset_t to a string representation consisting of canonical system
572  * call names. Parameters and return values analogous to proc_fltset2str().
573  */
574 char *
575 proc_sysset2str(const sysset_t *set, const char *delim, int m,
576 	char *buf, size_t len)
577 {
578 	char name[SYS2STR_MAX], *p = buf;
579 	size_t n;
580 	int i;
581 
582 	if (buf == NULL || len < 1) {
583 		errno = EINVAL;
584 		return (NULL);
585 	}
586 
587 	buf[0] = '\0';  /* Set first byte to \0 */
588 
589 	for (i = 1; i <= PRMAXSYS; i++) {
590 		if ((prismember(set, i) != 0) ^ (m == 0)) {
591 			(void) proc_sysname(i, name, sizeof (name));
592 
593 			if (buf[0] != '\0')
594 				n = snprintf(p, len, "%s%s", delim, name);
595 			else
596 				n = snprintf(p, len, "%s", name);
597 
598 			if (n != strlen(p)) {
599 				errno = ENAMETOOLONG; /* Output was truncated */
600 				return (NULL);
601 			}
602 			len -= n;
603 			p += n;
604 		}
605 	}
606 	return (buf);
607 }
608 
609 /*
610  * Convert a string representation of a fault set (names separated by
611  * one or more of the given delimeters) to a fltset_t.
612  * If m is non-zero (TRUE), members of the string representation are set.
613  * If m is zero (FALSE), non-members of the string representation are set.
614  * This function returns NULL for success. Otherwise it returns a pointer
615  * to the token of the string that couldn't be identified as a string
616  * representation of a fault.
617  */
618 char *
619 proc_str2fltset(const char *s, const char *delim, int m, fltset_t *set)
620 {
621 	char *p, *q, *t = alloca(strlen(s) + 1);
622 	int flt;
623 
624 	if (m) {
625 		premptyset(set);
626 	} else {
627 		prfillset(set);
628 	}
629 
630 	(void) strcpy(t, s);
631 
632 	for (p = strtok_r(t, delim, &q); p != NULL;
633 	    p = strtok_r(NULL, delim, &q)) {
634 		if (proc_str2flt(p, &flt) == -1) {
635 			errno = EINVAL;
636 			return ((char *)s + (p - t));
637 		}
638 		if (m)
639 			praddset(set, flt);
640 		else
641 			prdelset(set, flt);
642 	}
643 	return (NULL);
644 }
645 
646 /*
647  * Convert a string representation of a signal set (names with or without the
648  * SIG prefix separated by one or more of the given delimeters) to a sigset_t.
649  * Parameters and return values analogous to proc_str2fltset().
650  */
651 char *
652 proc_str2sigset(const char *s, const char *delim, int m, sigset_t *set)
653 {
654 	char *p, *q, *t = alloca(strlen(s) + 1);
655 	int sig;
656 
657 	if (m) {
658 		premptyset(set);
659 	} else {
660 		prfillset(set);
661 	}
662 
663 	(void) strcpy(t, s);
664 
665 	for (p = strtok_r(t, delim, &q); p != NULL;
666 	    p = strtok_r(NULL, delim, &q)) {
667 		if (proc_str2sig(p, &sig) == -1) {
668 			errno = EINVAL;
669 			return ((char *)s + (p - t));
670 		}
671 		if (m)
672 			praddset(set, sig);
673 		else
674 			prdelset(set, sig);
675 	}
676 	return (NULL);
677 }
678 
679 /*
680  * Convert a string representation of a system call set (names separated by
681  * one or more of the given delimeters) to a sysset_t. Parameters and return
682  * values analogous to proc_str2fltset().
683  */
684 char *
685 proc_str2sysset(const char *s, const char *delim, int m, sysset_t *set)
686 {
687 	char *p, *q, *t = alloca(strlen(s) + 1);
688 	int sys;
689 
690 	if (m) {
691 		premptyset(set);
692 	} else {
693 		prfillset(set);
694 	}
695 
696 	(void) strcpy(t, s);
697 
698 	for (p = strtok_r(t, delim, &q); p != NULL;
699 	    p = strtok_r(NULL, delim, &q)) {
700 		if (proc_str2sys(p, &sys) == -1) {
701 			errno = EINVAL;
702 			return ((char *)s + (p - t));
703 		}
704 		if (m)
705 			praddset(set, sys);
706 		else
707 			prdelset(set, sys);
708 	}
709 	return (NULL);
710 }
711