Annotation of src/usr.bin/ssh/misc.c, Revision 1.15
1.15 ! stevesk 1: /* $OpenBSD: misc.c,v 1.14 2001/12/19 07:18:56 deraadt Exp $ */
1.1 markus 2:
3: /*
4: * Copyright (c) 2000 Markus Friedl. All rights reserved.
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"
1.15 ! stevesk 28: RCSID("$OpenBSD: misc.c,v 1.14 2001/12/19 07:18:56 deraadt Exp $");
1.1 markus 29:
30: #include "misc.h"
31: #include "log.h"
1.3 deraadt 32: #include "xmalloc.h"
1.1 markus 33:
1.12 markus 34: /* remove newline at end of string */
1.1 markus 35: char *
36: chop(char *s)
37: {
38: char *t = s;
39: while (*t) {
1.13 deraadt 40: if (*t == '\n' || *t == '\r') {
1.1 markus 41: *t = '\0';
42: return s;
43: }
44: t++;
45: }
46: return s;
47:
48: }
49:
1.12 markus 50: /* set/unset filedescriptor to non-blocking */
1.1 markus 51: void
52: set_nonblock(int fd)
53: {
54: int val;
1.8 markus 55:
1.1 markus 56: val = fcntl(fd, F_GETFL, 0);
57: if (val < 0) {
58: error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
59: return;
60: }
61: if (val & O_NONBLOCK) {
1.8 markus 62: debug2("fd %d is O_NONBLOCK", fd);
1.1 markus 63: return;
64: }
65: debug("fd %d setting O_NONBLOCK", fd);
66: val |= O_NONBLOCK;
1.8 markus 67: if (fcntl(fd, F_SETFL, val) == -1)
68: if (errno != ENODEV)
69: error("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
70: fd, strerror(errno));
71: }
72:
73: void
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));
81: return;
82: }
83: if (!(val & O_NONBLOCK)) {
84: debug2("fd %d is not O_NONBLOCK", fd);
85: return;
86: }
1.10 markus 87: debug("fd %d clearing O_NONBLOCK", fd);
1.8 markus 88: val &= ~O_NONBLOCK;
1.1 markus 89: if (fcntl(fd, F_SETFL, val) == -1)
90: if (errno != ENODEV)
91: error("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
92: fd, strerror(errno));
1.15 ! stevesk 93: }
! 94:
! 95: /* disable nagle on socket */
! 96: void
! 97: set_nodelay(int fd)
! 98: {
! 99: int on = 1;
! 100:
! 101: debug("fd %d setting TCP_NODELAY", fd);
! 102: if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof on) == -1)
! 103: error("setsockopt TCP_NODELAY: %.100s", strerror(errno));
1.1 markus 104: }
105:
106: /* Characters considered whitespace in strsep calls. */
107: #define WHITESPACE " \t\r\n"
108:
1.12 markus 109: /* return next token in configuration line */
1.1 markus 110: char *
111: strdelim(char **s)
112: {
113: char *old;
114: int wspace = 0;
115:
116: if (*s == NULL)
117: return NULL;
118:
119: old = *s;
120:
121: *s = strpbrk(*s, WHITESPACE "=");
122: if (*s == NULL)
123: return (old);
124:
125: /* Allow only one '=' to be skipped */
126: if (*s[0] == '=')
127: wspace = 1;
128: *s[0] = '\0';
129:
130: *s += strspn(*s + 1, WHITESPACE) + 1;
131: if (*s[0] == '=' && !wspace)
132: *s += strspn(*s + 1, WHITESPACE) + 1;
133:
134: return (old);
1.2 markus 135: }
136:
137: struct passwd *
138: pwcopy(struct passwd *pw)
139: {
140: struct passwd *copy = xmalloc(sizeof(*copy));
1.4 deraadt 141:
1.2 markus 142: memset(copy, 0, sizeof(*copy));
143: copy->pw_name = xstrdup(pw->pw_name);
144: copy->pw_passwd = xstrdup(pw->pw_passwd);
1.4 deraadt 145: copy->pw_gecos = xstrdup(pw->pw_gecos);
1.2 markus 146: copy->pw_uid = pw->pw_uid;
147: copy->pw_gid = pw->pw_gid;
1.11 markus 148: copy->pw_expire = pw->pw_expire;
149: copy->pw_change = pw->pw_change;
1.2 markus 150: copy->pw_class = xstrdup(pw->pw_class);
151: copy->pw_dir = xstrdup(pw->pw_dir);
152: copy->pw_shell = xstrdup(pw->pw_shell);
153: return copy;
1.5 stevesk 154: }
155:
1.12 markus 156: /*
157: * Convert ASCII string to TCP/IP port number.
158: * Port must be >0 and <=65535.
159: * Return 0 if invalid.
160: */
161: int
162: a2port(const char *s)
1.5 stevesk 163: {
164: long port;
165: char *endp;
166:
167: errno = 0;
168: port = strtol(s, &endp, 0);
169: if (s == endp || *endp != '\0' ||
170: (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
171: port <= 0 || port > 65535)
172: return 0;
173:
174: return port;
1.9 stevesk 175: }
176:
177: #define SECONDS 1
178: #define MINUTES (SECONDS * 60)
179: #define HOURS (MINUTES * 60)
180: #define DAYS (HOURS * 24)
181: #define WEEKS (DAYS * 7)
182:
1.12 markus 183: /*
184: * Convert a time string into seconds; format is
185: * a sequence of:
186: * time[qualifier]
187: *
188: * Valid time qualifiers are:
189: * <none> seconds
190: * s|S seconds
191: * m|M minutes
192: * h|H hours
193: * d|D days
194: * w|W weeks
195: *
196: * Examples:
197: * 90m 90 minutes
198: * 1h30m 90 minutes
199: * 2d 2 days
200: * 1w 1 week
201: *
202: * Return -1 if time string is invalid.
203: */
204: long
205: convtime(const char *s)
1.9 stevesk 206: {
207: long total, secs;
208: const char *p;
209: char *endp;
210:
211: errno = 0;
212: total = 0;
213: p = s;
214:
215: if (p == NULL || *p == '\0')
216: return -1;
217:
218: while (*p) {
219: secs = strtol(p, &endp, 10);
220: if (p == endp ||
221: (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
222: secs < 0)
223: return -1;
224:
225: switch (*endp++) {
226: case '\0':
227: endp--;
228: case 's':
229: case 'S':
230: break;
231: case 'm':
232: case 'M':
233: secs *= MINUTES;
234: break;
235: case 'h':
236: case 'H':
237: secs *= HOURS;
238: break;
239: case 'd':
240: case 'D':
241: secs *= DAYS;
242: break;
243: case 'w':
244: case 'W':
245: secs *= WEEKS;
246: break;
247: default:
248: return -1;
249: }
250: total += secs;
251: if (total < 0)
252: return -1;
253: p = endp;
254: }
255:
256: return total;
1.6 mouring 257: }
258:
259: char *
260: cleanhostname(char *host)
261: {
262: if (*host == '[' && host[strlen(host) - 1] == ']') {
263: host[strlen(host) - 1] = '\0';
264: return (host + 1);
265: } else
266: return host;
267: }
268:
269: char *
270: colon(char *cp)
271: {
272: int flag = 0;
273:
274: if (*cp == ':') /* Leading colon is part of file name. */
275: return (0);
276: if (*cp == '[')
277: flag = 1;
278:
279: for (; *cp; ++cp) {
280: if (*cp == '@' && *(cp+1) == '[')
281: flag = 1;
282: if (*cp == ']' && *(cp+1) == ':' && flag)
283: return (cp+1);
284: if (*cp == ':' && !flag)
285: return (cp);
286: if (*cp == '/')
287: return (0);
288: }
289: return (0);
1.7 mouring 290: }
291:
1.12 markus 292: /* function to assist building execv() arguments */
1.7 mouring 293: void
294: addargs(arglist *args, char *fmt, ...)
295: {
296: va_list ap;
297: char buf[1024];
298:
299: va_start(ap, fmt);
300: vsnprintf(buf, sizeof(buf), fmt, ap);
301: va_end(ap);
302:
303: if (args->list == NULL) {
304: args->nalloc = 32;
305: args->num = 0;
1.14 deraadt 306: } else if (args->num+2 >= args->nalloc)
1.7 mouring 307: args->nalloc *= 2;
308:
309: args->list = xrealloc(args->list, args->nalloc * sizeof(char *));
310: args->list[args->num++] = xstrdup(buf);
311: args->list[args->num] = NULL;
1.1 markus 312: }
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