Annotation of src/usr.bin/ssh/misc.c, Revision 1.60
1.60 ! stevesk 1: /* $OpenBSD: misc.c,v 1.59 2006/07/17 01:31:09 stevesk Exp $ */
1.1 markus 2: /*
3: * Copyright (c) 2000 Markus Friedl. All rights reserved.
1.52 djm 4: * Copyright (c) 2005,2006 Damien Miller. All rights reserved.
1.1 markus 5: *
6: * Redistribution and use in source and binary forms, with or without
7: * modification, are permitted provided that the following conditions
8: * are met:
9: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: *
15: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27: #include "includes.h"
1.45 stevesk 28:
29: #include <sys/ioctl.h>
1.54 stevesk 30: #include <sys/types.h>
1.53 stevesk 31: #include <sys/socket.h>
1.38 stevesk 32:
33: #include <net/if.h>
1.53 stevesk 34: #include <netinet/in.h>
1.44 stevesk 35: #include <netinet/tcp.h>
1.43 stevesk 36:
1.58 stevesk 37: #include <errno.h>
1.55 stevesk 38: #include <fcntl.h>
1.43 stevesk 39: #include <paths.h>
1.54 stevesk 40: #include <pwd.h>
1.57 stevesk 41: #include <stdarg.h>
1.60 ! stevesk 42: #include <string.h>
1.59 stevesk 43: #include <unistd.h>
1.1 markus 44:
45: #include "misc.h"
46: #include "log.h"
1.3 deraadt 47: #include "xmalloc.h"
1.56 dtucker 48: #include "ssh.h"
1.1 markus 49:
1.12 markus 50: /* remove newline at end of string */
1.1 markus 51: char *
52: chop(char *s)
53: {
54: char *t = s;
55: while (*t) {
1.13 deraadt 56: if (*t == '\n' || *t == '\r') {
1.1 markus 57: *t = '\0';
58: return s;
59: }
60: t++;
61: }
62: return s;
63:
64: }
65:
1.12 markus 66: /* set/unset filedescriptor to non-blocking */
1.24 djm 67: int
1.1 markus 68: set_nonblock(int fd)
69: {
70: int val;
1.8 markus 71:
1.1 markus 72: val = fcntl(fd, F_GETFL, 0);
73: if (val < 0) {
74: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
1.24 djm 75: return (-1);
1.1 markus 76: }
77: if (val & O_NONBLOCK) {
1.24 djm 78: debug3("fd %d is O_NONBLOCK", fd);
79: return (0);
1.1 markus 80: }
1.21 markus 81: debug2("fd %d setting O_NONBLOCK", fd);
1.1 markus 82: val |= O_NONBLOCK;
1.24 djm 83: if (fcntl(fd, F_SETFL, val) == -1) {
84: debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd,
85: strerror(errno));
86: return (-1);
87: }
88: return (0);
1.8 markus 89: }
90:
1.24 djm 91: int
1.8 markus 92: unset_nonblock(int fd)
93: {
94: int val;
95:
96: val = fcntl(fd, F_GETFL, 0);
97: if (val < 0) {
98: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
1.24 djm 99: return (-1);
1.8 markus 100: }
101: if (!(val & O_NONBLOCK)) {
1.24 djm 102: debug3("fd %d is not O_NONBLOCK", fd);
103: return (0);
1.8 markus 104: }
1.10 markus 105: debug("fd %d clearing O_NONBLOCK", fd);
1.8 markus 106: val &= ~O_NONBLOCK;
1.24 djm 107: if (fcntl(fd, F_SETFL, val) == -1) {
108: debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s",
1.18 markus 109: fd, strerror(errno));
1.24 djm 110: return (-1);
111: }
112: return (0);
1.15 stevesk 113: }
114:
115: /* disable nagle on socket */
116: void
117: set_nodelay(int fd)
118: {
1.17 stevesk 119: int opt;
120: socklen_t optlen;
1.15 stevesk 121:
1.16 stevesk 122: optlen = sizeof opt;
123: if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
1.23 markus 124: debug("getsockopt TCP_NODELAY: %.100s", strerror(errno));
1.16 stevesk 125: return;
126: }
127: if (opt == 1) {
128: debug2("fd %d is TCP_NODELAY", fd);
129: return;
130: }
131: opt = 1;
1.20 markus 132: debug2("fd %d setting TCP_NODELAY", fd);
1.16 stevesk 133: if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
1.15 stevesk 134: error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
1.1 markus 135: }
136:
137: /* Characters considered whitespace in strsep calls. */
138: #define WHITESPACE " \t\r\n"
1.46 dtucker 139: #define QUOTE "\""
1.1 markus 140:
1.12 markus 141: /* return next token in configuration line */
1.1 markus 142: char *
143: strdelim(char **s)
144: {
145: char *old;
146: int wspace = 0;
147:
148: if (*s == NULL)
149: return NULL;
150:
151: old = *s;
152:
1.46 dtucker 153: *s = strpbrk(*s, WHITESPACE QUOTE "=");
1.1 markus 154: if (*s == NULL)
155: return (old);
156:
1.46 dtucker 157: if (*s[0] == '\"') {
158: memmove(*s, *s + 1, strlen(*s)); /* move nul too */
159: /* Find matching quote */
160: if ((*s = strpbrk(*s, QUOTE)) == NULL) {
161: return (NULL); /* no matching quote */
162: } else {
163: *s[0] = '\0';
164: return (old);
165: }
166: }
167:
1.1 markus 168: /* Allow only one '=' to be skipped */
169: if (*s[0] == '=')
170: wspace = 1;
171: *s[0] = '\0';
172:
1.46 dtucker 173: /* Skip any extra whitespace after first token */
1.1 markus 174: *s += strspn(*s + 1, WHITESPACE) + 1;
175: if (*s[0] == '=' && !wspace)
176: *s += strspn(*s + 1, WHITESPACE) + 1;
177:
178: return (old);
1.2 markus 179: }
180:
181: struct passwd *
182: pwcopy(struct passwd *pw)
183: {
1.49 djm 184: struct passwd *copy = xcalloc(1, sizeof(*copy));
1.4 deraadt 185:
1.2 markus 186: copy->pw_name = xstrdup(pw->pw_name);
187: copy->pw_passwd = xstrdup(pw->pw_passwd);
1.4 deraadt 188: copy->pw_gecos = xstrdup(pw->pw_gecos);
1.2 markus 189: copy->pw_uid = pw->pw_uid;
190: copy->pw_gid = pw->pw_gid;
1.11 markus 191: copy->pw_expire = pw->pw_expire;
192: copy->pw_change = pw->pw_change;
1.2 markus 193: copy->pw_class = xstrdup(pw->pw_class);
194: copy->pw_dir = xstrdup(pw->pw_dir);
195: copy->pw_shell = xstrdup(pw->pw_shell);
196: return copy;
1.5 stevesk 197: }
198:
1.12 markus 199: /*
200: * Convert ASCII string to TCP/IP port number.
201: * Port must be >0 and <=65535.
202: * Return 0 if invalid.
203: */
204: int
205: a2port(const char *s)
1.5 stevesk 206: {
207: long port;
208: char *endp;
209:
210: errno = 0;
211: port = strtol(s, &endp, 0);
212: if (s == endp || *endp != '\0' ||
213: (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
214: port <= 0 || port > 65535)
215: return 0;
216:
217: return port;
1.9 stevesk 218: }
219:
1.36 reyk 220: int
221: a2tun(const char *s, int *remote)
222: {
223: const char *errstr = NULL;
224: char *sp, *ep;
225: int tun;
226:
227: if (remote != NULL) {
1.37 reyk 228: *remote = SSH_TUNID_ANY;
1.36 reyk 229: sp = xstrdup(s);
230: if ((ep = strchr(sp, ':')) == NULL) {
231: xfree(sp);
232: return (a2tun(s, NULL));
233: }
234: ep[0] = '\0'; ep++;
235: *remote = a2tun(ep, NULL);
236: tun = a2tun(sp, NULL);
237: xfree(sp);
1.37 reyk 238: return (*remote == SSH_TUNID_ERR ? *remote : tun);
1.36 reyk 239: }
240:
241: if (strcasecmp(s, "any") == 0)
1.37 reyk 242: return (SSH_TUNID_ANY);
1.36 reyk 243:
1.37 reyk 244: tun = strtonum(s, 0, SSH_TUNID_MAX, &errstr);
245: if (errstr != NULL)
246: return (SSH_TUNID_ERR);
1.36 reyk 247:
248: return (tun);
249: }
250:
1.9 stevesk 251: #define SECONDS 1
252: #define MINUTES (SECONDS * 60)
253: #define HOURS (MINUTES * 60)
254: #define DAYS (HOURS * 24)
255: #define WEEKS (DAYS * 7)
256:
1.12 markus 257: /*
258: * Convert a time string into seconds; format is
259: * a sequence of:
260: * time[qualifier]
261: *
262: * Valid time qualifiers are:
263: * <none> seconds
264: * s|S seconds
265: * m|M minutes
266: * h|H hours
267: * d|D days
268: * w|W weeks
269: *
270: * Examples:
271: * 90m 90 minutes
272: * 1h30m 90 minutes
273: * 2d 2 days
274: * 1w 1 week
275: *
276: * Return -1 if time string is invalid.
277: */
278: long
279: convtime(const char *s)
1.9 stevesk 280: {
281: long total, secs;
282: const char *p;
283: char *endp;
284:
285: errno = 0;
286: total = 0;
287: p = s;
288:
289: if (p == NULL || *p == '\0')
290: return -1;
291:
292: while (*p) {
293: secs = strtol(p, &endp, 10);
294: if (p == endp ||
295: (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
296: secs < 0)
297: return -1;
298:
299: switch (*endp++) {
300: case '\0':
301: endp--;
1.48 deraadt 302: break;
1.9 stevesk 303: case 's':
304: case 'S':
305: break;
306: case 'm':
307: case 'M':
308: secs *= MINUTES;
309: break;
310: case 'h':
311: case 'H':
312: secs *= HOURS;
313: break;
314: case 'd':
315: case 'D':
316: secs *= DAYS;
317: break;
318: case 'w':
319: case 'W':
320: secs *= WEEKS;
321: break;
322: default:
323: return -1;
324: }
325: total += secs;
326: if (total < 0)
327: return -1;
328: p = endp;
329: }
330:
331: return total;
1.56 dtucker 332: }
333:
334: /*
335: * Returns a standardized host+port identifier string.
336: * Caller must free returned string.
337: */
338: char *
339: put_host_port(const char *host, u_short port)
340: {
341: char *hoststr;
342:
343: if (port == 0 || port == SSH_DEFAULT_PORT)
344: return(xstrdup(host));
345: if (asprintf(&hoststr, "[%s]:%d", host, (int)port) < 0)
346: fatal("put_host_port: asprintf: %s", strerror(errno));
347: debug3("put_host_port: %s", hoststr);
348: return hoststr;
1.28 djm 349: }
350:
351: /*
352: * Search for next delimiter between hostnames/addresses and ports.
353: * Argument may be modified (for termination).
354: * Returns *cp if parsing succeeds.
355: * *cp is set to the start of the next delimiter, if one was found.
356: * If this is the last field, *cp is set to NULL.
357: */
358: char *
359: hpdelim(char **cp)
360: {
361: char *s, *old;
362:
363: if (cp == NULL || *cp == NULL)
364: return NULL;
365:
366: old = s = *cp;
367: if (*s == '[') {
368: if ((s = strchr(s, ']')) == NULL)
369: return NULL;
370: else
371: s++;
372: } else if ((s = strpbrk(s, ":/")) == NULL)
373: s = *cp + strlen(*cp); /* skip to end (see first case below) */
374:
375: switch (*s) {
376: case '\0':
377: *cp = NULL; /* no more fields*/
378: break;
1.29 deraadt 379:
1.28 djm 380: case ':':
381: case '/':
382: *s = '\0'; /* terminate */
383: *cp = s + 1;
384: break;
1.29 deraadt 385:
1.28 djm 386: default:
387: return NULL;
388: }
389:
390: return old;
1.6 mouring 391: }
392:
393: char *
394: cleanhostname(char *host)
395: {
396: if (*host == '[' && host[strlen(host) - 1] == ']') {
397: host[strlen(host) - 1] = '\0';
398: return (host + 1);
399: } else
400: return host;
401: }
402:
403: char *
404: colon(char *cp)
405: {
406: int flag = 0;
407:
408: if (*cp == ':') /* Leading colon is part of file name. */
409: return (0);
410: if (*cp == '[')
411: flag = 1;
412:
413: for (; *cp; ++cp) {
414: if (*cp == '@' && *(cp+1) == '[')
415: flag = 1;
416: if (*cp == ']' && *(cp+1) == ':' && flag)
417: return (cp+1);
418: if (*cp == ':' && !flag)
419: return (cp);
420: if (*cp == '/')
421: return (0);
422: }
423: return (0);
1.7 mouring 424: }
425:
1.12 markus 426: /* function to assist building execv() arguments */
1.7 mouring 427: void
428: addargs(arglist *args, char *fmt, ...)
429: {
430: va_list ap;
1.42 djm 431: char *cp;
1.25 avsm 432: u_int nalloc;
1.42 djm 433: int r;
1.7 mouring 434:
435: va_start(ap, fmt);
1.42 djm 436: r = vasprintf(&cp, fmt, ap);
1.7 mouring 437: va_end(ap);
1.42 djm 438: if (r == -1)
439: fatal("addargs: argument too long");
1.7 mouring 440:
1.22 markus 441: nalloc = args->nalloc;
1.7 mouring 442: if (args->list == NULL) {
1.22 markus 443: nalloc = 32;
1.7 mouring 444: args->num = 0;
1.22 markus 445: } else if (args->num+2 >= nalloc)
446: nalloc *= 2;
1.7 mouring 447:
1.50 djm 448: args->list = xrealloc(args->list, nalloc, sizeof(char *));
1.22 markus 449: args->nalloc = nalloc;
1.42 djm 450: args->list[args->num++] = cp;
1.7 mouring 451: args->list[args->num] = NULL;
1.42 djm 452: }
453:
454: void
455: replacearg(arglist *args, u_int which, char *fmt, ...)
456: {
457: va_list ap;
458: char *cp;
459: int r;
460:
461: va_start(ap, fmt);
462: r = vasprintf(&cp, fmt, ap);
463: va_end(ap);
464: if (r == -1)
465: fatal("replacearg: argument too long");
466:
467: if (which >= args->num)
468: fatal("replacearg: tried to replace invalid arg %d >= %d",
469: which, args->num);
470: xfree(args->list[which]);
471: args->list[which] = cp;
472: }
473:
474: void
475: freeargs(arglist *args)
476: {
477: u_int i;
478:
479: if (args->list != NULL) {
480: for (i = 0; i < args->num; i++)
481: xfree(args->list[i]);
482: xfree(args->list);
483: args->nalloc = args->num = 0;
484: args->list = NULL;
485: }
1.30 djm 486: }
487:
488: /*
489: * Expands tildes in the file name. Returns data allocated by xmalloc.
490: * Warning: this calls getpw*.
491: */
492: char *
493: tilde_expand_filename(const char *filename, uid_t uid)
494: {
495: const char *path;
496: char user[128], ret[MAXPATHLEN];
497: struct passwd *pw;
1.32 djm 498: u_int len, slash;
1.30 djm 499:
500: if (*filename != '~')
501: return (xstrdup(filename));
502: filename++;
503:
504: path = strchr(filename, '/');
505: if (path != NULL && path > filename) { /* ~user/path */
1.32 djm 506: slash = path - filename;
507: if (slash > sizeof(user) - 1)
1.30 djm 508: fatal("tilde_expand_filename: ~username too long");
1.32 djm 509: memcpy(user, filename, slash);
510: user[slash] = '\0';
1.30 djm 511: if ((pw = getpwnam(user)) == NULL)
512: fatal("tilde_expand_filename: No such user %s", user);
513: } else if ((pw = getpwuid(uid)) == NULL) /* ~/path */
514: fatal("tilde_expand_filename: No such uid %d", uid);
515:
516: if (strlcpy(ret, pw->pw_dir, sizeof(ret)) >= sizeof(ret))
517: fatal("tilde_expand_filename: Path too long");
518:
519: /* Make sure directory has a trailing '/' */
520: len = strlen(pw->pw_dir);
521: if ((len == 0 || pw->pw_dir[len - 1] != '/') &&
522: strlcat(ret, "/", sizeof(ret)) >= sizeof(ret))
523: fatal("tilde_expand_filename: Path too long");
524:
525: /* Skip leading '/' from specified path */
526: if (path != NULL)
527: filename = path + 1;
528: if (strlcat(ret, filename, sizeof(ret)) >= sizeof(ret))
529: fatal("tilde_expand_filename: Path too long");
530:
531: return (xstrdup(ret));
1.31 djm 532: }
533:
534: /*
535: * Expand a string with a set of %[char] escapes. A number of escapes may be
536: * specified as (char *escape_chars, char *replacement) pairs. The list must
1.34 dtucker 537: * be terminated by a NULL escape_char. Returns replaced string in memory
1.31 djm 538: * allocated by xmalloc.
539: */
540: char *
541: percent_expand(const char *string, ...)
542: {
543: #define EXPAND_MAX_KEYS 16
544: struct {
545: const char *key;
546: const char *repl;
547: } keys[EXPAND_MAX_KEYS];
1.32 djm 548: u_int num_keys, i, j;
1.31 djm 549: char buf[4096];
550: va_list ap;
551:
552: /* Gather keys */
553: va_start(ap, string);
554: for (num_keys = 0; num_keys < EXPAND_MAX_KEYS; num_keys++) {
555: keys[num_keys].key = va_arg(ap, char *);
556: if (keys[num_keys].key == NULL)
557: break;
558: keys[num_keys].repl = va_arg(ap, char *);
559: if (keys[num_keys].repl == NULL)
560: fatal("percent_expand: NULL replacement");
561: }
562: va_end(ap);
563:
564: if (num_keys >= EXPAND_MAX_KEYS)
565: fatal("percent_expand: too many keys");
566:
567: /* Expand string */
568: *buf = '\0';
569: for (i = 0; *string != '\0'; string++) {
570: if (*string != '%') {
571: append:
572: buf[i++] = *string;
573: if (i >= sizeof(buf))
574: fatal("percent_expand: string too long");
575: buf[i] = '\0';
576: continue;
577: }
578: string++;
579: if (*string == '%')
580: goto append;
581: for (j = 0; j < num_keys; j++) {
582: if (strchr(keys[j].key, *string) != NULL) {
583: i = strlcat(buf, keys[j].repl, sizeof(buf));
584: if (i >= sizeof(buf))
585: fatal("percent_expand: string too long");
586: break;
587: }
588: }
589: if (j >= num_keys)
590: fatal("percent_expand: unknown key %%%c", *string);
591: }
592: return (xstrdup(buf));
593: #undef EXPAND_MAX_KEYS
1.26 dtucker 594: }
595:
596: /*
597: * Read an entire line from a public key file into a static buffer, discarding
598: * lines that exceed the buffer size. Returns 0 on success, -1 on failure.
599: */
600: int
601: read_keyfile_line(FILE *f, const char *filename, char *buf, size_t bufsz,
1.27 dtucker 602: u_long *lineno)
1.26 dtucker 603: {
604: while (fgets(buf, bufsz, f) != NULL) {
605: (*lineno)++;
606: if (buf[strlen(buf) - 1] == '\n' || feof(f)) {
607: return 0;
608: } else {
1.27 dtucker 609: debug("%s: %s line %lu exceeds size limit", __func__,
610: filename, *lineno);
1.26 dtucker 611: /* discard remainder of line */
1.29 deraadt 612: while (fgetc(f) != '\n' && !feof(f))
1.26 dtucker 613: ; /* nothing */
614: }
615: }
616: return -1;
1.36 reyk 617: }
618:
619: int
1.37 reyk 620: tun_open(int tun, int mode)
1.36 reyk 621: {
1.37 reyk 622: struct ifreq ifr;
1.36 reyk 623: char name[100];
1.37 reyk 624: int fd = -1, sock;
1.36 reyk 625:
1.37 reyk 626: /* Open the tunnel device */
627: if (tun <= SSH_TUNID_MAX) {
1.36 reyk 628: snprintf(name, sizeof(name), "/dev/tun%d", tun);
1.37 reyk 629: fd = open(name, O_RDWR);
630: } else if (tun == SSH_TUNID_ANY) {
631: for (tun = 100; tun >= 0; tun--) {
632: snprintf(name, sizeof(name), "/dev/tun%d", tun);
633: if ((fd = open(name, O_RDWR)) >= 0)
634: break;
1.36 reyk 635: }
636: } else {
1.39 stevesk 637: debug("%s: invalid tunnel %u", __func__, tun);
1.37 reyk 638: return (-1);
639: }
640:
641: if (fd < 0) {
642: debug("%s: %s open failed: %s", __func__, name, strerror(errno));
643: return (-1);
1.36 reyk 644: }
1.37 reyk 645:
646: debug("%s: %s mode %d fd %d", __func__, name, mode, fd);
647:
648: /* Set the tunnel device operation mode */
649: snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "tun%d", tun);
650: if ((sock = socket(PF_UNIX, SOCK_STREAM, 0)) == -1)
651: goto failed;
652:
653: if (ioctl(sock, SIOCGIFFLAGS, &ifr) == -1)
654: goto failed;
1.40 reyk 655:
656: /* Set interface mode */
657: ifr.ifr_flags &= ~IFF_UP;
658: if (mode == SSH_TUNMODE_ETHERNET)
1.37 reyk 659: ifr.ifr_flags |= IFF_LINK0;
1.40 reyk 660: else
661: ifr.ifr_flags &= ~IFF_LINK0;
662: if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
663: goto failed;
664:
665: /* Bring interface up */
1.37 reyk 666: ifr.ifr_flags |= IFF_UP;
667: if (ioctl(sock, SIOCSIFFLAGS, &ifr) == -1)
668: goto failed;
669:
670: close(sock);
671: return (fd);
672:
673: failed:
674: if (fd >= 0)
675: close(fd);
676: if (sock >= 0)
677: close(sock);
678: debug("%s: failed to set %s mode %d: %s", __func__, name,
679: mode, strerror(errno));
1.36 reyk 680: return (-1);
1.35 djm 681: }
682:
683: void
684: sanitise_stdfd(void)
685: {
1.41 djm 686: int nullfd, dupfd;
1.35 djm 687:
1.41 djm 688: if ((nullfd = dupfd = open(_PATH_DEVNULL, O_RDWR)) == -1) {
1.35 djm 689: fprintf(stderr, "Couldn't open /dev/null: %s", strerror(errno));
690: exit(1);
691: }
1.41 djm 692: while (++dupfd <= 2) {
693: /* Only clobber closed fds */
694: if (fcntl(dupfd, F_GETFL, 0) >= 0)
695: continue;
696: if (dup2(nullfd, dupfd) == -1) {
1.35 djm 697: fprintf(stderr, "dup2: %s", strerror(errno));
698: exit(1);
699: }
700: }
701: if (nullfd > 2)
702: close(nullfd);
1.1 markus 703: }
1.33 djm 704:
705: char *
1.52 djm 706: tohex(const void *vp, size_t l)
1.33 djm 707: {
1.52 djm 708: const u_char *p = (const u_char *)vp;
1.33 djm 709: char b[3], *r;
1.52 djm 710: size_t i, hl;
711:
712: if (l > 65536)
713: return xstrdup("tohex: length > 65536");
1.33 djm 714:
715: hl = l * 2 + 1;
1.49 djm 716: r = xcalloc(1, hl);
1.33 djm 717: for (i = 0; i < l; i++) {
1.52 djm 718: snprintf(b, sizeof(b), "%02x", p[i]);
1.33 djm 719: strlcat(r, b, hl);
720: }
721: return (r);
722: }
723:
1.52 djm 724: u_int64_t
725: get_u64(const void *vp)
726: {
727: const u_char *p = (const u_char *)vp;
728: u_int64_t v;
729:
730: v = (u_int64_t)p[0] << 56;
731: v |= (u_int64_t)p[1] << 48;
732: v |= (u_int64_t)p[2] << 40;
733: v |= (u_int64_t)p[3] << 32;
734: v |= (u_int64_t)p[4] << 24;
735: v |= (u_int64_t)p[5] << 16;
736: v |= (u_int64_t)p[6] << 8;
737: v |= (u_int64_t)p[7];
738:
739: return (v);
740: }
741:
742: u_int32_t
743: get_u32(const void *vp)
744: {
745: const u_char *p = (const u_char *)vp;
746: u_int32_t v;
747:
748: v = (u_int32_t)p[0] << 24;
749: v |= (u_int32_t)p[1] << 16;
750: v |= (u_int32_t)p[2] << 8;
751: v |= (u_int32_t)p[3];
752:
753: return (v);
754: }
755:
756: u_int16_t
757: get_u16(const void *vp)
758: {
759: const u_char *p = (const u_char *)vp;
760: u_int16_t v;
761:
762: v = (u_int16_t)p[0] << 8;
763: v |= (u_int16_t)p[1];
764:
765: return (v);
766: }
767:
768: void
769: put_u64(void *vp, u_int64_t v)
770: {
771: u_char *p = (u_char *)vp;
772:
773: p[0] = (u_char)(v >> 56) & 0xff;
774: p[1] = (u_char)(v >> 48) & 0xff;
775: p[2] = (u_char)(v >> 40) & 0xff;
776: p[3] = (u_char)(v >> 32) & 0xff;
777: p[4] = (u_char)(v >> 24) & 0xff;
778: p[5] = (u_char)(v >> 16) & 0xff;
779: p[6] = (u_char)(v >> 8) & 0xff;
780: p[7] = (u_char)v & 0xff;
781: }
782:
783: void
784: put_u32(void *vp, u_int32_t v)
785: {
786: u_char *p = (u_char *)vp;
787:
788: p[0] = (u_char)(v >> 24) & 0xff;
789: p[1] = (u_char)(v >> 16) & 0xff;
790: p[2] = (u_char)(v >> 8) & 0xff;
791: p[3] = (u_char)v & 0xff;
792: }
793:
794:
795: void
796: put_u16(void *vp, u_int16_t v)
797: {
798: u_char *p = (u_char *)vp;
799:
800: p[0] = (u_char)(v >> 8) & 0xff;
801: p[1] = (u_char)v & 0xff;
802: }
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