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1.13 ! deraadt 1: /* $OpenBSD: misc.c,v 1.12 2001/06/26 17:27:24 markus 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"
1.13 ! deraadt 28: RCSID("$OpenBSD: misc.c,v 1.12 2001/06/26 17:27:24 markus 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));
93: }
94:
95: /* Characters considered whitespace in strsep calls. */
96: #define WHITESPACE " \t\r\n"
97:
1.12 markus 98: /* return next token in configuration line */
1.1 markus 99: char *
100: strdelim(char **s)
101: {
102: char *old;
103: int wspace = 0;
104:
105: if (*s == NULL)
106: return NULL;
107:
108: old = *s;
109:
110: *s = strpbrk(*s, WHITESPACE "=");
111: if (*s == NULL)
112: return (old);
113:
114: /* Allow only one '=' to be skipped */
115: if (*s[0] == '=')
116: wspace = 1;
117: *s[0] = '\0';
118:
119: *s += strspn(*s + 1, WHITESPACE) + 1;
120: if (*s[0] == '=' && !wspace)
121: *s += strspn(*s + 1, WHITESPACE) + 1;
122:
123: return (old);
1.2 markus 124: }
125:
126: struct passwd *
127: pwcopy(struct passwd *pw)
128: {
129: struct passwd *copy = xmalloc(sizeof(*copy));
1.4 deraadt 130:
1.2 markus 131: memset(copy, 0, sizeof(*copy));
132: copy->pw_name = xstrdup(pw->pw_name);
133: copy->pw_passwd = xstrdup(pw->pw_passwd);
1.4 deraadt 134: copy->pw_gecos = xstrdup(pw->pw_gecos);
1.2 markus 135: copy->pw_uid = pw->pw_uid;
136: copy->pw_gid = pw->pw_gid;
1.11 markus 137: copy->pw_expire = pw->pw_expire;
138: copy->pw_change = pw->pw_change;
1.2 markus 139: copy->pw_class = xstrdup(pw->pw_class);
140: copy->pw_dir = xstrdup(pw->pw_dir);
141: copy->pw_shell = xstrdup(pw->pw_shell);
142: return copy;
1.5 stevesk 143: }
144:
1.12 markus 145: /*
146: * Convert ASCII string to TCP/IP port number.
147: * Port must be >0 and <=65535.
148: * Return 0 if invalid.
149: */
150: int
151: a2port(const char *s)
1.5 stevesk 152: {
153: long port;
154: char *endp;
155:
156: errno = 0;
157: port = strtol(s, &endp, 0);
158: if (s == endp || *endp != '\0' ||
159: (errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
160: port <= 0 || port > 65535)
161: return 0;
162:
163: return port;
1.9 stevesk 164: }
165:
166: #define SECONDS 1
167: #define MINUTES (SECONDS * 60)
168: #define HOURS (MINUTES * 60)
169: #define DAYS (HOURS * 24)
170: #define WEEKS (DAYS * 7)
171:
1.12 markus 172: /*
173: * Convert a time string into seconds; format is
174: * a sequence of:
175: * time[qualifier]
176: *
177: * Valid time qualifiers are:
178: * <none> seconds
179: * s|S seconds
180: * m|M minutes
181: * h|H hours
182: * d|D days
183: * w|W weeks
184: *
185: * Examples:
186: * 90m 90 minutes
187: * 1h30m 90 minutes
188: * 2d 2 days
189: * 1w 1 week
190: *
191: * Return -1 if time string is invalid.
192: */
193: long
194: convtime(const char *s)
1.9 stevesk 195: {
196: long total, secs;
197: const char *p;
198: char *endp;
199:
200: errno = 0;
201: total = 0;
202: p = s;
203:
204: if (p == NULL || *p == '\0')
205: return -1;
206:
207: while (*p) {
208: secs = strtol(p, &endp, 10);
209: if (p == endp ||
210: (errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
211: secs < 0)
212: return -1;
213:
214: switch (*endp++) {
215: case '\0':
216: endp--;
217: case 's':
218: case 'S':
219: break;
220: case 'm':
221: case 'M':
222: secs *= MINUTES;
223: break;
224: case 'h':
225: case 'H':
226: secs *= HOURS;
227: break;
228: case 'd':
229: case 'D':
230: secs *= DAYS;
231: break;
232: case 'w':
233: case 'W':
234: secs *= WEEKS;
235: break;
236: default:
237: return -1;
238: }
239: total += secs;
240: if (total < 0)
241: return -1;
242: p = endp;
243: }
244:
245: return total;
1.6 mouring 246: }
247:
248: char *
249: cleanhostname(char *host)
250: {
251: if (*host == '[' && host[strlen(host) - 1] == ']') {
252: host[strlen(host) - 1] = '\0';
253: return (host + 1);
254: } else
255: return host;
256: }
257:
258: char *
259: colon(char *cp)
260: {
261: int flag = 0;
262:
263: if (*cp == ':') /* Leading colon is part of file name. */
264: return (0);
265: if (*cp == '[')
266: flag = 1;
267:
268: for (; *cp; ++cp) {
269: if (*cp == '@' && *(cp+1) == '[')
270: flag = 1;
271: if (*cp == ']' && *(cp+1) == ':' && flag)
272: return (cp+1);
273: if (*cp == ':' && !flag)
274: return (cp);
275: if (*cp == '/')
276: return (0);
277: }
278: return (0);
1.7 mouring 279: }
280:
1.12 markus 281: /* function to assist building execv() arguments */
1.7 mouring 282: void
283: addargs(arglist *args, char *fmt, ...)
284: {
285: va_list ap;
286: char buf[1024];
287:
288: va_start(ap, fmt);
289: vsnprintf(buf, sizeof(buf), fmt, ap);
290: va_end(ap);
291:
292: if (args->list == NULL) {
293: args->nalloc = 32;
294: args->num = 0;
295: } else if (args->num+2 >= args->nalloc)
296: args->nalloc *= 2;
297:
298: args->list = xrealloc(args->list, args->nalloc * sizeof(char *));
299: args->list[args->num++] = xstrdup(buf);
300: args->list[args->num] = NULL;
1.1 markus 301: }