Annotation of src/usr.bin/ssh/misc.c, Revision 1.20.2.2
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"
1.20.2.2! brad 26: RCSID("$OpenBSD: misc.c,v 1.23 2003/10/28 09:08:06 markus 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 */
1.1 markus 49: void
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));
57: return;
58: }
59: if (val & O_NONBLOCK) {
1.8 markus 60: debug2("fd %d is O_NONBLOCK", fd);
1.1 markus 61: return;
62: }
1.20.2.1 brad 63: debug2("fd %d setting O_NONBLOCK", fd);
1.1 markus 64: val |= O_NONBLOCK;
1.8 markus 65: if (fcntl(fd, F_SETFL, val) == -1)
1.18 markus 66: debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
67: fd, strerror(errno));
1.8 markus 68: }
69:
70: void
71: unset_nonblock(int fd)
72: {
73: int val;
74:
75: val = fcntl(fd, F_GETFL, 0);
76: if (val < 0) {
77: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
78: return;
79: }
80: if (!(val & O_NONBLOCK)) {
81: debug2("fd %d is not O_NONBLOCK", fd);
82: return;
83: }
1.10 markus 84: debug("fd %d clearing O_NONBLOCK", fd);
1.8 markus 85: val &= ~O_NONBLOCK;
1.1 markus 86: if (fcntl(fd, F_SETFL, val) == -1)
1.18 markus 87: debug("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
88: fd, strerror(errno));
1.15 stevesk 89: }
90:
91: /* disable nagle on socket */
92: void
93: set_nodelay(int fd)
94: {
1.17 stevesk 95: int opt;
96: socklen_t optlen;
1.15 stevesk 97:
1.16 stevesk 98: optlen = sizeof opt;
99: if (getsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, &optlen) == -1) {
1.20.2.2! brad 100: debug("getsockopt TCP_NODELAY: %.100s", strerror(errno));
1.16 stevesk 101: return;
102: }
103: if (opt == 1) {
104: debug2("fd %d is TCP_NODELAY", fd);
105: return;
106: }
107: opt = 1;
1.20 markus 108: debug2("fd %d setting TCP_NODELAY", fd);
1.16 stevesk 109: if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof opt) == -1)
1.15 stevesk 110: error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
1.1 markus 111: }
112:
113: /* Characters considered whitespace in strsep calls. */
114: #define WHITESPACE " \t\r\n"
115:
1.12 markus 116: /* return next token in configuration line */
1.1 markus 117: char *
118: strdelim(char **s)
119: {
120: char *old;
121: int wspace = 0;
122:
123: if (*s == NULL)
124: return NULL;
125:
126: old = *s;
127:
128: *s = strpbrk(*s, WHITESPACE "=");
129: if (*s == NULL)
130: return (old);
131:
132: /* Allow only one '=' to be skipped */
133: if (*s[0] == '=')
134: wspace = 1;
135: *s[0] = '\0';
136:
137: *s += strspn(*s + 1, WHITESPACE) + 1;
138: if (*s[0] == '=' && !wspace)
139: *s += strspn(*s + 1, WHITESPACE) + 1;
140:
141: return (old);
1.2 markus 142: }
143:
144: struct passwd *
145: pwcopy(struct passwd *pw)
146: {
147: struct passwd *copy = xmalloc(sizeof(*copy));
1.4 deraadt 148:
1.2 markus 149: memset(copy, 0, sizeof(*copy));
150: copy->pw_name = xstrdup(pw->pw_name);
151: copy->pw_passwd = xstrdup(pw->pw_passwd);
1.4 deraadt 152: copy->pw_gecos = xstrdup(pw->pw_gecos);
1.2 markus 153: copy->pw_uid = pw->pw_uid;
154: copy->pw_gid = pw->pw_gid;
1.11 markus 155: copy->pw_expire = pw->pw_expire;
156: copy->pw_change = pw->pw_change;
1.2 markus 157: copy->pw_class = xstrdup(pw->pw_class);
158: copy->pw_dir = xstrdup(pw->pw_dir);
159: copy->pw_shell = xstrdup(pw->pw_shell);
160: return copy;
1.5 stevesk 161: }
162:
1.12 markus 163: /*
164: * Convert ASCII string to TCP/IP port number.
165: * Port must be >0 and <=65535.
166: * Return 0 if invalid.
167: */
168: int
169: a2port(const char *s)
1.5 stevesk 170: {
171: long port;
172: char *endp;
173:
174: errno = 0;
175: port = strtol(s, &endp, 0);
176: if (s == endp || *endp != '\0' ||
177: (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
178: port <= 0 || port > 65535)
179: return 0;
180:
181: return port;
1.9 stevesk 182: }
183:
184: #define SECONDS 1
185: #define MINUTES (SECONDS * 60)
186: #define HOURS (MINUTES * 60)
187: #define DAYS (HOURS * 24)
188: #define WEEKS (DAYS * 7)
189:
1.12 markus 190: /*
191: * Convert a time string into seconds; format is
192: * a sequence of:
193: * time[qualifier]
194: *
195: * Valid time qualifiers are:
196: * <none> seconds
197: * s|S seconds
198: * m|M minutes
199: * h|H hours
200: * d|D days
201: * w|W weeks
202: *
203: * Examples:
204: * 90m 90 minutes
205: * 1h30m 90 minutes
206: * 2d 2 days
207: * 1w 1 week
208: *
209: * Return -1 if time string is invalid.
210: */
211: long
212: convtime(const char *s)
1.9 stevesk 213: {
214: long total, secs;
215: const char *p;
216: char *endp;
217:
218: errno = 0;
219: total = 0;
220: p = s;
221:
222: if (p == NULL || *p == '\0')
223: return -1;
224:
225: while (*p) {
226: secs = strtol(p, &endp, 10);
227: if (p == endp ||
228: (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
229: secs < 0)
230: return -1;
231:
232: switch (*endp++) {
233: case '\0':
234: endp--;
235: case 's':
236: case 'S':
237: break;
238: case 'm':
239: case 'M':
240: secs *= MINUTES;
241: break;
242: case 'h':
243: case 'H':
244: secs *= HOURS;
245: break;
246: case 'd':
247: case 'D':
248: secs *= DAYS;
249: break;
250: case 'w':
251: case 'W':
252: secs *= WEEKS;
253: break;
254: default:
255: return -1;
256: }
257: total += secs;
258: if (total < 0)
259: return -1;
260: p = endp;
261: }
262:
263: return total;
1.6 mouring 264: }
265:
266: char *
267: cleanhostname(char *host)
268: {
269: if (*host == '[' && host[strlen(host) - 1] == ']') {
270: host[strlen(host) - 1] = '\0';
271: return (host + 1);
272: } else
273: return host;
274: }
275:
276: char *
277: colon(char *cp)
278: {
279: int flag = 0;
280:
281: if (*cp == ':') /* Leading colon is part of file name. */
282: return (0);
283: if (*cp == '[')
284: flag = 1;
285:
286: for (; *cp; ++cp) {
287: if (*cp == '@' && *(cp+1) == '[')
288: flag = 1;
289: if (*cp == ']' && *(cp+1) == ':' && flag)
290: return (cp+1);
291: if (*cp == ':' && !flag)
292: return (cp);
293: if (*cp == '/')
294: return (0);
295: }
296: return (0);
1.7 mouring 297: }
298:
1.12 markus 299: /* function to assist building execv() arguments */
1.7 mouring 300: void
301: addargs(arglist *args, char *fmt, ...)
302: {
303: va_list ap;
304: char buf[1024];
1.20.2.2! brad 305: int nalloc;
1.7 mouring 306:
307: va_start(ap, fmt);
308: vsnprintf(buf, sizeof(buf), fmt, ap);
309: va_end(ap);
310:
1.20.2.2! brad 311: nalloc = args->nalloc;
1.7 mouring 312: if (args->list == NULL) {
1.20.2.2! brad 313: nalloc = 32;
1.7 mouring 314: args->num = 0;
1.20.2.2! brad 315: } else if (args->num+2 >= nalloc)
! 316: nalloc *= 2;
1.7 mouring 317:
1.20.2.2! brad 318: args->list = xrealloc(args->list, nalloc * sizeof(char *));
! 319: args->nalloc = nalloc;
1.7 mouring 320: args->list[args->num++] = xstrdup(buf);
321: args->list[args->num] = NULL;
1.1 markus 322: }
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