Annotation of src/usr.bin/ssh/misc.c, Revision 1.25.2.1
1.1 markus 1: /*
2: * Copyright (c) 2000 Markus Friedl. All rights reserved.
3: *
4: * Redistribution and use in source and binary forms, with or without
5: * modification, are permitted provided that the following conditions
6: * are met:
7: * 1. Redistributions of source code must retain the above copyright
8: * notice, this list of conditions and the following disclaimer.
9: * 2. Redistributions in binary form must reproduce the above copyright
10: * notice, this list of conditions and the following disclaimer in the
11: * documentation and/or other materials provided with the distribution.
12: *
13: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23: */
24:
25: #include "includes.h"
1.25.2.1! brad 26: RCSID("$OpenBSD: misc.c,v 1.28 2005/03/01 10:09:52 djm Exp $");
1.1 markus 27:
28: #include "misc.h"
29: #include "log.h"
1.3 deraadt 30: #include "xmalloc.h"
1.1 markus 31:
1.12 markus 32: /* remove newline at end of string */
1.1 markus 33: char *
34: chop(char *s)
35: {
36: char *t = s;
37: while (*t) {
1.13 deraadt 38: if (*t == '\n' || *t == '\r') {
1.1 markus 39: *t = '\0';
40: return s;
41: }
42: t++;
43: }
44: return s;
45:
46: }
47:
1.12 markus 48: /* set/unset filedescriptor to non-blocking */
1.24 djm 49: int
1.1 markus 50: set_nonblock(int fd)
51: {
52: int val;
1.8 markus 53:
1.1 markus 54: val = fcntl(fd, F_GETFL, 0);
55: if (val < 0) {
56: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
1.24 djm 57: return (-1);
1.1 markus 58: }
59: if (val & O_NONBLOCK) {
1.24 djm 60: debug3("fd %d is O_NONBLOCK", fd);
61: return (0);
1.1 markus 62: }
1.21 markus 63: debug2("fd %d setting O_NONBLOCK", fd);
1.1 markus 64: val |= O_NONBLOCK;
1.24 djm 65: if (fcntl(fd, F_SETFL, val) == -1) {
66: debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s", fd,
67: strerror(errno));
68: return (-1);
69: }
70: return (0);
1.8 markus 71: }
72:
1.24 djm 73: int
1.8 markus 74: unset_nonblock(int fd)
75: {
76: int val;
77:
78: val = fcntl(fd, F_GETFL, 0);
79: if (val < 0) {
80: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
1.24 djm 81: return (-1);
1.8 markus 82: }
83: if (!(val & O_NONBLOCK)) {
1.24 djm 84: debug3("fd %d is not O_NONBLOCK", fd);
85: return (0);
1.8 markus 86: }
1.10 markus 87: debug("fd %d clearing O_NONBLOCK", fd);
1.8 markus 88: val &= ~O_NONBLOCK;
1.24 djm 89: if (fcntl(fd, F_SETFL, val) == -1) {
90: debug("fcntl(%d, F_SETFL, ~O_NONBLOCK): %s",
1.18 markus 91: fd, strerror(errno));
1.24 djm 92: return (-1);
93: }
94: return (0);
1.15 stevesk 95: }
96:
97: /* disable nagle on socket */
98: void
99: set_nodelay(int fd)
100: {
1.17 stevesk 101: int opt;
102: socklen_t optlen;
1.15 stevesk 103:
1.16 stevesk 104: optlen = sizeof opt;
105: if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
1.23 markus 106: debug("getsockopt TCP_NODELAY: %.100s", strerror(errno));
1.16 stevesk 107: return;
108: }
109: if (opt == 1) {
110: debug2("fd %d is TCP_NODELAY", fd);
111: return;
112: }
113: opt = 1;
1.20 markus 114: debug2("fd %d setting TCP_NODELAY", fd);
1.16 stevesk 115: if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
1.15 stevesk 116: error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
1.1 markus 117: }
118:
119: /* Characters considered whitespace in strsep calls. */
120: #define WHITESPACE " \t\r\n"
121:
1.12 markus 122: /* return next token in configuration line */
1.1 markus 123: char *
124: strdelim(char **s)
125: {
126: char *old;
127: int wspace = 0;
128:
129: if (*s == NULL)
130: return NULL;
131:
132: old = *s;
133:
134: *s = strpbrk(*s, WHITESPACE "=");
135: if (*s == NULL)
136: return (old);
137:
138: /* Allow only one '=' to be skipped */
139: if (*s[0] == '=')
140: wspace = 1;
141: *s[0] = '\0';
142:
143: *s += strspn(*s + 1, WHITESPACE) + 1;
144: if (*s[0] == '=' && !wspace)
145: *s += strspn(*s + 1, WHITESPACE) + 1;
146:
147: return (old);
1.2 markus 148: }
149:
150: struct passwd *
151: pwcopy(struct passwd *pw)
152: {
153: struct passwd *copy = xmalloc(sizeof(*copy));
1.4 deraadt 154:
1.2 markus 155: memset(copy, 0, sizeof(*copy));
156: copy->pw_name = xstrdup(pw->pw_name);
157: copy->pw_passwd = xstrdup(pw->pw_passwd);
1.4 deraadt 158: copy->pw_gecos = xstrdup(pw->pw_gecos);
1.2 markus 159: copy->pw_uid = pw->pw_uid;
160: copy->pw_gid = pw->pw_gid;
1.11 markus 161: copy->pw_expire = pw->pw_expire;
162: copy->pw_change = pw->pw_change;
1.2 markus 163: copy->pw_class = xstrdup(pw->pw_class);
164: copy->pw_dir = xstrdup(pw->pw_dir);
165: copy->pw_shell = xstrdup(pw->pw_shell);
166: return copy;
1.5 stevesk 167: }
168:
1.12 markus 169: /*
170: * Convert ASCII string to TCP/IP port number.
171: * Port must be >0 and <=65535.
172: * Return 0 if invalid.
173: */
174: int
175: a2port(const char *s)
1.5 stevesk 176: {
177: long port;
178: char *endp;
179:
180: errno = 0;
181: port = strtol(s, &endp, 0);
182: if (s == endp || *endp != '\0' ||
183: (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
184: port <= 0 || port > 65535)
185: return 0;
186:
187: return port;
1.9 stevesk 188: }
189:
190: #define SECONDS 1
191: #define MINUTES (SECONDS * 60)
192: #define HOURS (MINUTES * 60)
193: #define DAYS (HOURS * 24)
194: #define WEEKS (DAYS * 7)
195:
1.12 markus 196: /*
197: * Convert a time string into seconds; format is
198: * a sequence of:
199: * time[qualifier]
200: *
201: * Valid time qualifiers are:
202: * <none> seconds
203: * s|S seconds
204: * m|M minutes
205: * h|H hours
206: * d|D days
207: * w|W weeks
208: *
209: * Examples:
210: * 90m 90 minutes
211: * 1h30m 90 minutes
212: * 2d 2 days
213: * 1w 1 week
214: *
215: * Return -1 if time string is invalid.
216: */
217: long
218: convtime(const char *s)
1.9 stevesk 219: {
220: long total, secs;
221: const char *p;
222: char *endp;
223:
224: errno = 0;
225: total = 0;
226: p = s;
227:
228: if (p == NULL || *p == '\0')
229: return -1;
230:
231: while (*p) {
232: secs = strtol(p, &endp, 10);
233: if (p == endp ||
234: (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
235: secs < 0)
236: return -1;
237:
238: switch (*endp++) {
239: case '\0':
240: endp--;
241: case 's':
242: case 'S':
243: break;
244: case 'm':
245: case 'M':
246: secs *= MINUTES;
247: break;
248: case 'h':
249: case 'H':
250: secs *= HOURS;
251: break;
252: case 'd':
253: case 'D':
254: secs *= DAYS;
255: break;
256: case 'w':
257: case 'W':
258: secs *= WEEKS;
259: break;
260: default:
261: return -1;
262: }
263: total += secs;
264: if (total < 0)
265: return -1;
266: p = endp;
267: }
268:
269: return total;
1.6 mouring 270: }
271:
1.25.2.1! brad 272: /*
! 273: * Search for next delimiter between hostnames/addresses and ports.
! 274: * Argument may be modified (for termination).
! 275: * Returns *cp if parsing succeeds.
! 276: * *cp is set to the start of the next delimiter, if one was found.
! 277: * If this is the last field, *cp is set to NULL.
! 278: */
! 279: char *
! 280: hpdelim(char **cp)
! 281: {
! 282: char *s, *old;
! 283:
! 284: if (cp == NULL || *cp == NULL)
! 285: return NULL;
! 286:
! 287: old = s = *cp;
! 288: if (*s == '[') {
! 289: if ((s = strchr(s, ']')) == NULL)
! 290: return NULL;
! 291: else
! 292: s++;
! 293: } else if ((s = strpbrk(s, ":/")) == NULL)
! 294: s = *cp + strlen(*cp); /* skip to end (see first case below) */
! 295:
! 296: switch (*s) {
! 297: case '\0':
! 298: *cp = NULL; /* no more fields*/
! 299: break;
! 300:
! 301: case ':':
! 302: case '/':
! 303: *s = '\0'; /* terminate */
! 304: *cp = s + 1;
! 305: break;
! 306:
! 307: default:
! 308: return NULL;
! 309: }
! 310:
! 311: return old;
! 312: }
! 313:
1.6 mouring 314: char *
315: cleanhostname(char *host)
316: {
317: if (*host == '[' && host[strlen(host) - 1] == ']') {
318: host[strlen(host) - 1] = '\0';
319: return (host + 1);
320: } else
321: return host;
322: }
323:
324: char *
325: colon(char *cp)
326: {
327: int flag = 0;
328:
329: if (*cp == ':') /* Leading colon is part of file name. */
330: return (0);
331: if (*cp == '[')
332: flag = 1;
333:
334: for (; *cp; ++cp) {
335: if (*cp == '@' && *(cp+1) == '[')
336: flag = 1;
337: if (*cp == ']' && *(cp+1) == ':' && flag)
338: return (cp+1);
339: if (*cp == ':' && !flag)
340: return (cp);
341: if (*cp == '/')
342: return (0);
343: }
344: return (0);
1.7 mouring 345: }
346:
1.12 markus 347: /* function to assist building execv() arguments */
1.7 mouring 348: void
349: addargs(arglist *args, char *fmt, ...)
350: {
351: va_list ap;
352: char buf[1024];
1.25 avsm 353: u_int nalloc;
1.7 mouring 354:
355: va_start(ap, fmt);
356: vsnprintf(buf, sizeof(buf), fmt, ap);
357: va_end(ap);
358:
1.22 markus 359: nalloc = args->nalloc;
1.7 mouring 360: if (args->list == NULL) {
1.22 markus 361: nalloc = 32;
1.7 mouring 362: args->num = 0;
1.22 markus 363: } else if (args->num+2 >= nalloc)
364: nalloc *= 2;
1.7 mouring 365:
1.22 markus 366: args->list = xrealloc(args->list, nalloc * sizeof(char *));
367: args->nalloc = nalloc;
1.7 mouring 368: args->list[args->num++] = xstrdup(buf);
369: args->list[args->num] = NULL;
1.25.2.1! brad 370: }
! 371:
! 372: /*
! 373: * Read an entire line from a public key file into a static buffer, discarding
! 374: * lines that exceed the buffer size. Returns 0 on success, -1 on failure.
! 375: */
! 376: int
! 377: read_keyfile_line(FILE *f, const char *filename, char *buf, size_t bufsz,
! 378: u_long *lineno)
! 379: {
! 380: while (fgets(buf, bufsz, f) != NULL) {
! 381: (*lineno)++;
! 382: if (buf[strlen(buf) - 1] == '\n' || feof(f)) {
! 383: return 0;
! 384: } else {
! 385: debug("%s: %s line %lu exceeds size limit", __func__,
! 386: filename, *lineno);
! 387: /* discard remainder of line */
! 388: while(fgetc(f) != '\n' && !feof(f))
! 389: ; /* nothing */
! 390: }
! 391: }
! 392: return -1;
1.1 markus 393: }
![[BACK]](/icons/back.gif){kind=icon}
Return to misc.c CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [local] / src / usr.bin / ssh