xref: /titanic_41/usr/src/lib/libproc/common/proc_names.c (revision 28f17cb2cce2c4ba0dcda9d9f52a8935aa02e489)
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 /*
23  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
24  * Copyright (c) 2015, Joyent, Inc.  All rights reserved.
25  */
26 
27 #include <stdio.h>
28 #define	__EXTENSIONS__
29 #include <string.h>
30 #undef  __EXTENSIONS__
31 #include <signal.h>
32 #include <errno.h>
33 #include "libproc.h"
34 
35 static const char *
rawfltname(int flt)36 rawfltname(int flt)
37 {
38 	const char *name;
39 
40 	switch (flt) {
41 	case FLTILL:	name = "FLTILL";	break;
42 	case FLTPRIV:	name = "FLTPRIV";	break;
43 	case FLTBPT:	name = "FLTBPT";	break;
44 	case FLTTRACE:	name = "FLTTRACE";	break;
45 	case FLTACCESS:	name = "FLTACCESS";	break;
46 	case FLTBOUNDS:	name = "FLTBOUNDS";	break;
47 	case FLTIOVF:	name = "FLTIOVF";	break;
48 	case FLTIZDIV:	name = "FLTIZDIV";	break;
49 	case FLTFPE:	name = "FLTFPE";	break;
50 	case FLTSTACK:	name = "FLTSTACK";	break;
51 	case FLTPAGE:	name = "FLTPAGE";	break;
52 	case FLTWATCH:	name = "FLTWATCH";	break;
53 	case FLTCPCOVF:	name = "FLTCPCOVF";	break;
54 	default:	name = NULL;		break;
55 	}
56 
57 	return (name);
58 }
59 
60 /*
61  * Return the name of a fault.
62  * Manufacture a name for unknown fault.
63  */
64 char *
proc_fltname(int flt,char * buf,size_t bufsz)65 proc_fltname(int flt, char *buf, size_t bufsz)
66 {
67 	const char *name = rawfltname(flt);
68 	size_t len;
69 
70 	if (bufsz == 0)		/* force a program failure */
71 		return (NULL);
72 
73 	if (name != NULL) {
74 		len = strlen(name);
75 		(void) strncpy(buf, name, bufsz);
76 	} else {
77 		len = snprintf(buf, bufsz, "FLT#%d", flt);
78 	}
79 
80 	if (len >= bufsz)	/* ensure null-termination */
81 		buf[bufsz-1] = '\0';
82 
83 	return (buf);
84 }
85 
86 /*
87  * Return the name of a signal.
88  * Manufacture a name for unknown signal.
89  */
90 char *
proc_signame(int sig,char * buf,size_t bufsz)91 proc_signame(int sig, char *buf, size_t bufsz)
92 {
93 	char name[SIG2STR_MAX+4];
94 	size_t len;
95 
96 	if (bufsz == 0)		/* force a program failure */
97 		return (NULL);
98 
99 	/* sig2str() omits the leading "SIG" */
100 	(void) strcpy(name, "SIG");
101 
102 	if (sig2str(sig, name+3) == 0) {
103 		len = strlen(name);
104 		(void) strncpy(buf, name, bufsz);
105 	} else {
106 		len = snprintf(buf, bufsz, "SIG#%d", sig);
107 	}
108 
109 	if (len >= bufsz)	/* ensure null-termination */
110 		buf[bufsz-1] = '\0';
111 
112 	return (buf);
113 }
114 
115 static const char *const systable[] = {
116 	NULL,			/*  0 */
117 	"_exit",		/*  1 */
118 	NULL,			/*  2 */
119 	"read",			/*  3 */
120 	"write",		/*  4 */
121 	"open",			/*  5 */
122 	"close",		/*  6 */
123 	"linkat",		/*  7 */
124 	NULL,			/*  8 */
125 	"link",			/*  9 */
126 	"unlink",		/* 10 */
127 	"symlinkat",		/* 11 */
128 	"chdir",		/* 12 */
129 	"time",			/* 13 */
130 	"mknod",		/* 14 */
131 	"chmod",		/* 15 */
132 	"chown",		/* 16 */
133 	"brk",			/* 17 */
134 	"stat",			/* 18 */
135 	"lseek",		/* 19 */
136 	"getpid",		/* 20 */
137 	"mount",		/* 21 */
138 	"readlinkat",		/* 22 */
139 	"setuid",		/* 23 */
140 	"getuid",		/* 24 */
141 	"stime",		/* 25 */
142 	"ptrace",		/* 26 */
143 	"alarm",		/* 27 */
144 	"fstat",		/* 28 */
145 	"pause",		/* 29 */
146 	NULL,			/* 30 */
147 	"stty",			/* 31 */
148 	"gtty",			/* 32 */
149 	"access",		/* 33 */
150 	"nice",			/* 34 */
151 	"statfs",		/* 35 */
152 	"sync",			/* 36 */
153 	"kill",			/* 37 */
154 	"fstatfs",		/* 38 */
155 	"pgrpsys",		/* 39 */
156 	"uucopystr",		/* 40 */
157 	NULL,			/* 41 */
158 	"pipe",			/* 42 */
159 	"times",		/* 43 */
160 	"profil",		/* 44 */
161 	"faccessat",		/* 45 */
162 	"setgid",		/* 46 */
163 	"getgid",		/* 47 */
164 	"mknodat",		/* 48 */
165 	"msgsys",		/* 49 */
166 	"sysi86",		/* 50 */
167 	"acct",			/* 51 */
168 	"shmsys",		/* 52 */
169 	"semsys",		/* 53 */
170 	"ioctl",		/* 54 */
171 	"uadmin",		/* 55 */
172 	"fchownat",		/* 56 */
173 	"utssys",		/* 57 */
174 	"fdsync",		/* 58 */
175 	"execve",		/* 59 */
176 	"umask",		/* 60 */
177 	"chroot",		/* 61 */
178 	"fcntl",		/* 62 */
179 	"ulimit",		/* 63 */
180 	"renameat",		/* 64 */
181 	"unlinkat",		/* 65 */
182 	"fstatat",		/* 66 */
183 	"fstatat64",		/* 67 */
184 	"openat",		/* 68 */
185 	"openat64",		/* 69 */
186 	"tasksys",		/* 70 */
187 	"acctctl",		/* 71 */
188 	"exacctsys",		/* 72 */
189 	"getpagesizes",		/* 73 */
190 	"rctlsys",		/* 74 */
191 	"issetugid",		/* 75 */
192 	"fsat",			/* 76 */
193 	"lwp_park",		/* 77 */
194 	"sendfilev",		/* 78 */
195 	"rmdir",		/* 79 */
196 	"mkdir",		/* 80 */
197 	"getdents",		/* 81 */
198 	"privsys",		/* 82 */
199 	"ucredsys",		/* 83 */
200 	"sysfs",		/* 84 */
201 	"getmsg",		/* 85 */
202 	"putmsg",		/* 86 */
203 	NULL,			/* 87 */
204 	"lstat",		/* 88 */
205 	"symlink",		/* 89 */
206 	"readlink",		/* 90 */
207 	"setgroups",		/* 91 */
208 	"getgroups",		/* 92 */
209 	"fchmod",		/* 93 */
210 	"fchown",		/* 94 */
211 	"sigprocmask",		/* 95 */
212 	"sigsuspend",		/* 96 */
213 	"sigaltstack",		/* 97 */
214 	"sigaction",		/* 98 */
215 	"sigpending",		/* 99 */
216 	"context",		/* 100 */
217 	"fchmodat",		/* 101 */
218 	"mkdirat",		/* 102 */
219 	"statvfs",		/* 103 */
220 	"fstatvfs",		/* 104 */
221 	"getloadavg",		/* 105 */
222 	"nfssys",		/* 106 */
223 	"waitid",		/* 107 */
224 	"sigsendsys",		/* 108 */
225 	"hrtsys",		/* 109 */
226 	"acancel",		/* 110 */
227 	"async",		/* 111 */
228 	"priocntlsys",		/* 112 */
229 	"pathconf",		/* 113 */
230 	"mincore",		/* 114 */
231 	"mmap",			/* 115 */
232 	"mprotect",		/* 116 */
233 	"munmap",		/* 117 */
234 	"fpathconf",		/* 118 */
235 	"vfork",		/* 119 */
236 	"fchdir",		/* 120 */
237 	"readv",		/* 121 */
238 	"writev",		/* 122 */
239 	"preadv",		/* 123 */
240 	"pwritev",		/* 124 */
241 	NULL,			/* 125 */
242 	"getrandom",		/* 126 */
243 	"mmapobj",		/* 127 */
244 	"setrlimit",		/* 128 */
245 	"getrlimit",		/* 129 */
246 	"lchown",		/* 130 */
247 	"memcntl",		/* 131 */
248 	"getpmsg",		/* 132 */
249 	"putpmsg",		/* 133 */
250 	"rename",		/* 134 */
251 	"uname",		/* 135 */
252 	"setegid",		/* 136 */
253 	"sysconfig",		/* 137 */
254 	"adjtime",		/* 138 */
255 	"systeminfo",		/* 139 */
256 	"sharefs",		/* 140 */
257 	"seteuid",		/* 141 */
258 	"forksys",		/* 142 */
259 	NULL,			/* 143 */
260 	"sigtimedwait",		/* 144 */
261 	"lwp_info",		/* 145 */
262 	"yield",		/* 146 */
263 	NULL,			/* 147 */
264 	"lwp_sema_post",	/* 148 */
265 	"lwp_sema_trywait",	/* 149 */
266 	"lwp_detatch",		/* 150 */
267 	"corectl",		/* 151 */
268 	"modctl",		/* 152 */
269 	"fchroot",		/* 153 */
270 	NULL,			/* 154 */
271 	"vhangup",		/* 155 */
272 	"gettimeofday",		/* 156 */
273 	"getitimer",		/* 157 */
274 	"setitimer",		/* 158 */
275 	"lwp_create",		/* 159 */
276 	"lwp_exit",		/* 160 */
277 	"lwp_suspend",		/* 161 */
278 	"lwp_continue",		/* 162 */
279 	"lwp_kill",		/* 163 */
280 	"lwp_self",		/* 164 */
281 	"lwp_sigmask",		/* 165 */
282 	"lwp_private",		/* 166 */
283 	"lwp_wait",		/* 167 */
284 	"lwp_mutex_wakeup",	/* 168 */
285 	NULL,			/* 169 */
286 	"lwp_cond_wait",	/* 170 */
287 	"lwp_cond_signal",	/* 171 */
288 	"lwp_cond_broadcast",	/* 172 */
289 	"pread",		/* 173 */
290 	"pwrite",		/* 174 */
291 	"llseek",		/* 175 */
292 	"inst_sync",		/* 176 */
293 	"brand",		/* 177 */
294 	"kaio",			/* 178 */
295 	"cpc",			/* 179 */
296 	"lgrpsys",		/* 180 */
297 	"rusagesys",		/* 181 */
298 	"portfs",		/* 182 */
299 	"pollsys",		/* 183 */
300 	"labelsys",		/* 184 */
301 	"acl",			/* 185 */
302 	"auditsys",		/* 186 */
303 	"processor_bind",	/* 187 */
304 	"processor_info",	/* 188 */
305 	"p_online",		/* 189 */
306 	"sigqueue",		/* 190 */
307 	"clock_gettime",	/* 191 */
308 	"clock_settime",	/* 192 */
309 	"clock_getres",		/* 193 */
310 	"timer_create",		/* 194 */
311 	"timer_delete",		/* 195 */
312 	"timer_settime",	/* 196 */
313 	"timer_gettime",	/* 197 */
314 	"timer_getoverrun",	/* 198 */
315 	"nanosleep",		/* 199 */
316 	"facl",			/* 200 */
317 	"door",			/* 201 */
318 	"setreuid",		/* 202 */
319 	"setregid",		/* 203 */
320 	"install_utrap",	/* 204 */
321 	"signotify",		/* 205 */
322 	"schedctl",		/* 206 */
323 	"pset",			/* 207 */
324 	"sparc_utrap_install",	/* 208 */
325 	"resolvepath",		/* 209 */
326 	"lwp_mutex_timedlock",	/* 210 */
327 	"lwp_sema_timedwait",	/* 211 */
328 	"lwp_rwlock_sys",	/* 212 */
329 	"getdents64",		/* 213 */
330 	"mmap64",		/* 214 */
331 	"stat64",		/* 215 */
332 	"lstat64",		/* 216 */
333 	"fstat64",		/* 217 */
334 	"statvfs64",		/* 218 */
335 	"fstatvfs64",		/* 219 */
336 	"setrlimit64",		/* 220 */
337 	"getrlimit64",		/* 221 */
338 	"pread64",		/* 222 */
339 	"pwrite64",		/* 223 */
340 	NULL,			/* 224 */
341 	"open64",		/* 225 */
342 	"rpcmod",		/* 226 */
343 	"zone",			/* 227 */
344 	"autofssys",		/* 228 */
345 	"getcwd",		/* 229 */
346 	"so_socket",		/* 230 */
347 	"so_socketpair",	/* 231 */
348 	"bind",			/* 232 */
349 	"listen",		/* 233 */
350 	"accept",		/* 234 */
351 	"connect",		/* 235 */
352 	"shutdown",		/* 236 */
353 	"recv",			/* 237 */
354 	"recvfrom",		/* 238 */
355 	"recvmsg",		/* 239 */
356 	"send",			/* 240 */
357 	"sendmsg",		/* 241 */
358 	"sendto",		/* 242 */
359 	"getpeername",		/* 243 */
360 	"getsockname",		/* 244 */
361 	"getsockopt",		/* 245 */
362 	"setsockopt",		/* 246 */
363 	"sockconfig",		/* 247 */
364 	"ntp_gettime",		/* 248 */
365 	"ntp_adjtime",		/* 249 */
366 	"lwp_mutex_unlock",	/* 250 */
367 	"lwp_mutex_trylock",	/* 251 */
368 	"lwp_mutex_register",	/* 252 */
369 	"cladm",		/* 253 */
370 	"uucopy",		/* 254 */
371 	"umount2"		/* 255 */
372 };
373 
374 /* SYSEND == max syscall number + 1 */
375 #define	SYSEND	(sizeof (systable) / sizeof (systable[0]))
376 
377 /*
378  * Return the name of a system call.
379  * Manufacture a name for unknown system call.
380  */
381 char *
proc_sysname(int sys,char * buf,size_t bufsz)382 proc_sysname(int sys, char *buf, size_t bufsz)
383 {
384 	const char *name;
385 	size_t len;
386 
387 	if (bufsz == 0)		/* force a program failure */
388 		return (NULL);
389 
390 	if (sys >= 0 && sys < SYSEND)
391 		name = systable[sys];
392 	else
393 		name = NULL;
394 
395 	if (name != NULL) {
396 		len = strlen(name);
397 		(void) strncpy(buf, name, bufsz);
398 	} else {
399 		len = snprintf(buf, bufsz, "SYS#%d", sys);
400 	}
401 
402 	if (len >= bufsz)	/* ensure null-termination */
403 		buf[bufsz-1] = '\0';
404 
405 	return (buf);
406 }
407 
408 /*
409  * Convert a string representation of a fault to the corresponding number.
410  */
411 int
proc_str2flt(const char * str,int * fltnum)412 proc_str2flt(const char *str, int *fltnum)
413 {
414 	char *next;
415 	int i;
416 
417 	i = strtol(str, &next, 0);
418 	if (i > 0 && i <= PRMAXFAULT && *next == '\0') {
419 		*fltnum = i;
420 		return (0);
421 	}
422 
423 	for (i = 1; i <= PRMAXFAULT; i++) {
424 		const char *s = rawfltname(i);
425 
426 		if (s && (strcasecmp(s, str) == 0 ||
427 		    strcasecmp(s + 3, str) == 0)) {
428 			*fltnum = i;
429 			return (0);
430 		}
431 	}
432 
433 	return (-1);
434 }
435 
436 /*
437  * Convert a string representation of a signal to the signal number.  This
438  * functionality is already available in libc, but the interface doesn't
439  * optionally accept a "SIG" prefix.  We strip that first, and then call libc.
440  */
441 int
proc_str2sig(const char * str,int * signum)442 proc_str2sig(const char *str, int *signum)
443 {
444 	if (strncasecmp(str, "SIG", 3) == 0)
445 		str += 3; /* skip prefix */
446 
447 	return (str2sig(str, signum));
448 }
449 
450 /*
451  * Convert a string representation of a system call to the corresponding number.
452  * We do this by performing a simple linear search of the table above.
453  */
454 int
proc_str2sys(const char * str,int * sysnum)455 proc_str2sys(const char *str, int *sysnum)
456 {
457 	char *next;
458 	int i;
459 
460 	i = strtol(str, &next, 0);
461 	if (i > 0 && i <= PRMAXSYS && *next == '\0') {
462 		*sysnum = i;
463 		return (0);
464 	}
465 
466 	for (i = 1; i < SYSEND; i++) {
467 		if (systable[i] != NULL && strcmp(systable[i], str) == 0) {
468 			*sysnum = i;
469 			return (0);
470 		}
471 	}
472 
473 	return (-1);
474 }
475 
476 /*
477  * Convert a fltset_t to a string representation consisting of canonical
478  * machine fault names separated by the given delimeter string.  If
479  * m is non-zero (TRUE), set members are printed.  If m is zero (FALSE), set
480  * non-members are printed.  If the specified buf is too small to hold the
481  * complete formatted set, NULL is returned; otherwise buf is returned.
482  */
483 char *
proc_fltset2str(const fltset_t * set,const char * delim,int m,char * buf,size_t len)484 proc_fltset2str(const fltset_t *set, const char *delim, int m,
485 	char *buf, size_t len)
486 {
487 	char name[FLT2STR_MAX], *p = buf;
488 	size_t n;
489 	int i;
490 
491 	if (buf == NULL || len < 1) {
492 		errno = EINVAL;
493 		return (NULL);
494 	}
495 
496 	buf[0] = '\0';  /* Set first byte to \0 */
497 
498 	for (i = 1; i <= PRMAXFAULT; i++) {
499 		if ((prismember(set, i) != 0) ^ (m == 0)) {
500 			(void) proc_fltname(i, name, sizeof (name));
501 
502 			if (buf[0] != '\0')
503 				n = snprintf(p, len, "%s%s", delim, name);
504 			else
505 				n = snprintf(p, len, "%s", name);
506 
507 			if (n != strlen(p)) {
508 				errno = ENAMETOOLONG; /* Output was truncated */
509 				return (NULL);
510 			}
511 			len -= n;
512 			p += n;
513 		}
514 	}
515 	return (buf);
516 }
517 
518 /*
519  * Convert a sigset_t to a string representation consisting of canonical signal
520  * names (without the SIG prefix). Parameters and return values analogous to
521  * proc_fltset2str().
522  */
523 char *
proc_sigset2str(const sigset_t * set,const char * delim,int m,char * buf,size_t len)524 proc_sigset2str(const sigset_t *set, const char *delim, int m,
525 	char *buf, size_t len)
526 {
527 	char name[SIG2STR_MAX], *p = buf;
528 	size_t n;
529 	int i;
530 
531 	if (buf == NULL || len < 1) {
532 		errno = EINVAL;
533 		return (NULL);
534 	}
535 
536 	m = (m != 0);	/* Make sure m is 0 or 1 */
537 	buf[0] = '\0';	/* Set first byte to \0 */
538 
539 	/*
540 	 * Unlike proc_fltset2str() and proc_sysset2str(), we don't loop
541 	 * until i <= NSIG here, because sigismember() rejects i == NSIG.
542 	 */
543 	for (i = 1; i < NSIG; i++) {
544 		if (sigismember(set, i) == m) {
545 			(void) sig2str(i, name);
546 
547 			if (buf[0] != '\0')
548 				n = snprintf(p, len, "%s%s", delim, name);
549 			else
550 				n = snprintf(p, len, "%s", name);
551 
552 			if (n != strlen(p)) {
553 				errno = ENAMETOOLONG; /* Output was truncated */
554 				return (NULL);
555 			}
556 
557 			len -= n;
558 			p += n;
559 		}
560 	}
561 
562 	return (buf);
563 }
564 
565 /*
566  * Convert a sysset_t to a string representation consisting of canonical system
567  * call names. Parameters and return values analogous to proc_fltset2str().
568  */
569 char *
proc_sysset2str(const sysset_t * set,const char * delim,int m,char * buf,size_t len)570 proc_sysset2str(const sysset_t *set, const char *delim, int m,
571 	char *buf, size_t len)
572 {
573 	char name[SYS2STR_MAX], *p = buf;
574 	size_t n;
575 	int i;
576 
577 	if (buf == NULL || len < 1) {
578 		errno = EINVAL;
579 		return (NULL);
580 	}
581 
582 	buf[0] = '\0';  /* Set first byte to \0 */
583 
584 	for (i = 1; i <= PRMAXSYS; i++) {
585 		if ((prismember(set, i) != 0) ^ (m == 0)) {
586 			(void) proc_sysname(i, name, sizeof (name));
587 
588 			if (buf[0] != '\0')
589 				n = snprintf(p, len, "%s%s", delim, name);
590 			else
591 				n = snprintf(p, len, "%s", name);
592 
593 			if (n != strlen(p)) {
594 				errno = ENAMETOOLONG; /* Output was truncated */
595 				return (NULL);
596 			}
597 			len -= n;
598 			p += n;
599 		}
600 	}
601 	return (buf);
602 }
603 
604 /*
605  * Convert a string representation of a fault set (names separated by
606  * one or more of the given delimeters) to a fltset_t.
607  * If m is non-zero (TRUE), members of the string representation are set.
608  * If m is zero (FALSE), non-members of the string representation are set.
609  * This function returns NULL for success. Otherwise it returns a pointer
610  * to the token of the string that couldn't be identified as a string
611  * representation of a fault.
612  */
613 char *
proc_str2fltset(const char * s,const char * delim,int m,fltset_t * set)614 proc_str2fltset(const char *s, const char *delim, int m, fltset_t *set)
615 {
616 	char *p, *q, *t;
617 	int flt;
618 
619 	if (m) {
620 		premptyset(set);
621 	} else {
622 		prfillset(set);
623 	}
624 
625 	t = strdupa(s);
626 
627 	for (p = strtok_r(t, delim, &q); p != NULL;
628 	    p = strtok_r(NULL, delim, &q)) {
629 		if (proc_str2flt(p, &flt) == -1) {
630 			errno = EINVAL;
631 			return ((char *)s + (p - t));
632 		}
633 		if (m)
634 			praddset(set, flt);
635 		else
636 			prdelset(set, flt);
637 	}
638 	return (NULL);
639 }
640 
641 /*
642  * Convert a string representation of a signal set (names with or without the
643  * SIG prefix separated by one or more of the given delimeters) to a sigset_t.
644  * Parameters and return values analogous to proc_str2fltset().
645  */
646 char *
proc_str2sigset(const char * s,const char * delim,int m,sigset_t * set)647 proc_str2sigset(const char *s, const char *delim, int m, sigset_t *set)
648 {
649 	char *p, *q, *t;
650 	int sig;
651 
652 	if (m) {
653 		premptyset(set);
654 	} else {
655 		prfillset(set);
656 	}
657 
658 	t = strdupa(s);
659 
660 	for (p = strtok_r(t, delim, &q); p != NULL;
661 	    p = strtok_r(NULL, delim, &q)) {
662 		if (proc_str2sig(p, &sig) == -1) {
663 			errno = EINVAL;
664 			return ((char *)s + (p - t));
665 		}
666 		if (m)
667 			praddset(set, sig);
668 		else
669 			prdelset(set, sig);
670 	}
671 	return (NULL);
672 }
673 
674 /*
675  * Convert a string representation of a system call set (names separated by
676  * one or more of the given delimeters) to a sysset_t. Parameters and return
677  * values analogous to proc_str2fltset().
678  */
679 char *
proc_str2sysset(const char * s,const char * delim,int m,sysset_t * set)680 proc_str2sysset(const char *s, const char *delim, int m, sysset_t *set)
681 {
682 	char *p, *q, *t;
683 	int sys;
684 
685 	if (m) {
686 		premptyset(set);
687 	} else {
688 		prfillset(set);
689 	}
690 
691 	t = strdupa(s);
692 
693 	for (p = strtok_r(t, delim, &q); p != NULL;
694 	    p = strtok_r(NULL, delim, &q)) {
695 		if (proc_str2sys(p, &sys) == -1) {
696 			errno = EINVAL;
697 			return ((char *)s + (p - t));
698 		}
699 		if (m)
700 			praddset(set, sys);
701 		else
702 			prdelset(set, sys);
703 	}
704 	return (NULL);
705 }
706