NetBSD/crypto/dist/ssh/misc.c

303 lines
6.2 KiB
C

/* $NetBSD: misc.c,v 1.7 2001/09/27 03:24:03 itojun Exp $ */
/* $OpenBSD: misc.c,v 1.12 2001/06/26 17:27:24 markus Exp $ */
/*
* Copyright (c) 2000 Markus Friedl. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "includes.h"
RCSID("$OpenBSD: misc.c,v 1.12 2001/06/26 17:27:24 markus Exp $");
#include "misc.h"
#include "log.h"
#include "xmalloc.h"
/* remove newline at end of string */
char *
chop(char *s)
{
char *t = s;
while (*t) {
if(*t == '\n' || *t == '\r') {
*t = '\0';
return s;
}
t++;
}
return s;
}
/* set/unset filedescriptor to non-blocking */
void
set_nonblock(int fd)
{
int val;
val = fcntl(fd, F_GETFL, 0);
if (val < 0) {
error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
return;
}
if (val & O_NONBLOCK) {
debug2("fd %d is O_NONBLOCK", fd);
return;
}
debug("fd %d setting O_NONBLOCK", fd);
val |= O_NONBLOCK;
if (fcntl(fd, F_SETFL, val) == -1)
if (errno != ENODEV)
error("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
fd, strerror(errno));
}
void
unset_nonblock(int fd)
{
int val;
val = fcntl(fd, F_GETFL, 0);
if (val < 0) {
error("fcntl(%d, F_GETFL, 0): %s", fd, strerror(errno));
return;
}
if (!(val & O_NONBLOCK)) {
debug2("fd %d is not O_NONBLOCK", fd);
return;
}
debug("fd %d clearing O_NONBLOCK", fd);
val &= ~O_NONBLOCK;
if (fcntl(fd, F_SETFL, val) == -1)
if (errno != ENODEV)
error("fcntl(%d, F_SETFL, O_NONBLOCK): %s",
fd, strerror(errno));
}
/* Characters considered whitespace in strsep calls. */
#define WHITESPACE " \t\r\n"
/* return next token in configuration line */
char *
strdelim(char **s)
{
char *old;
int wspace = 0;
if (*s == NULL)
return NULL;
old = *s;
*s = strpbrk(*s, WHITESPACE "=");
if (*s == NULL)
return (old);
/* Allow only one '=' to be skipped */
if (*s[0] == '=')
wspace = 1;
*s[0] = '\0';
*s += strspn(*s + 1, WHITESPACE) + 1;
if (*s[0] == '=' && !wspace)
*s += strspn(*s + 1, WHITESPACE) + 1;
return (old);
}
struct passwd *
pwcopy(struct passwd *pw)
{
struct passwd *copy = xmalloc(sizeof(*copy));
memset(copy, 0, sizeof(*copy));
copy->pw_name = xstrdup(pw->pw_name);
copy->pw_passwd = xstrdup(pw->pw_passwd);
copy->pw_gecos = xstrdup(pw->pw_gecos);
copy->pw_uid = pw->pw_uid;
copy->pw_gid = pw->pw_gid;
copy->pw_expire = pw->pw_expire;
copy->pw_change = pw->pw_change;
copy->pw_class = xstrdup(pw->pw_class);
copy->pw_dir = xstrdup(pw->pw_dir);
copy->pw_shell = xstrdup(pw->pw_shell);
return copy;
}
/*
* Convert ASCII string to TCP/IP port number.
* Port must be >0 and <=65535.
* Return 0 if invalid.
*/
int
a2port(const char *s)
{
long port;
char *endp;
errno = 0;
port = strtol(s, &endp, 0);
if (s == endp || *endp != '\0' ||
(errno == ERANGE && (port == LONG_MIN || port == LONG_MAX)) ||
port <= 0 || port > 65535)
return 0;
return port;
}
#define SECONDS 1
#define MINUTES (SECONDS * 60)
#define HOURS (MINUTES * 60)
#define DAYS (HOURS * 24)
#define WEEKS (DAYS * 7)
/*
* Convert a time string into seconds; format is
* a sequence of:
* time[qualifier]
*
* Valid time qualifiers are:
* <none> seconds
* s|S seconds
* m|M minutes
* h|H hours
* d|D days
* w|W weeks
*
* Examples:
* 90m 90 minutes
* 1h30m 90 minutes
* 2d 2 days
* 1w 1 week
*
* Return -1 if time string is invalid.
*/
long
convtime(const char *s)
{
long total, secs;
const char *p;
char *endp;
errno = 0;
total = 0;
p = s;
if (p == NULL || *p == '\0')
return -1;
while (*p) {
secs = strtol(p, &endp, 10);
if (p == endp ||
(errno == ERANGE && (secs == LONG_MIN || secs == LONG_MAX)) ||
secs < 0)
return -1;
switch (*endp++) {
case '\0':
endp--;
case 's':
case 'S':
break;
case 'm':
case 'M':
secs *= MINUTES;
break;
case 'h':
case 'H':
secs *= HOURS;
break;
case 'd':
case 'D':
secs *= DAYS;
break;
case 'w':
case 'W':
secs *= WEEKS;
break;
default:
return -1;
}
total += secs;
if (total < 0)
return -1;
p = endp;
}
return total;
}
char *
cleanhostname(char *host)
{
if (*host == '[' && host[strlen(host) - 1] == ']') {
host[strlen(host) - 1] = '\0';
return (host + 1);
} else
return host;
}
char *
colon(char *cp)
{
int flag = 0;
if (*cp == ':') /* Leading colon is part of file name. */
return (0);
if (*cp == '[')
flag = 1;
for (; *cp; ++cp) {
if (*cp == '@' && *(cp+1) == '[')
flag = 1;
if (*cp == ']' && *(cp+1) == ':' && flag)
return (cp+1);
if (*cp == ':' && !flag)
return (cp);
if (*cp == '/')
return (0);
}
return (0);
}
/* function to assist building execv() arguments */
void
addargs(arglist *args, char *fmt, ...)
{
va_list ap;
char buf[1024];
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
va_end(ap);
if (args->list == NULL) {
args->nalloc = 32;
args->num = 0;
} else if (args->num+2 >= args->nalloc)
args->nalloc *= 2;
args->list = xrealloc(args->list, args->nalloc * sizeof(char *));
args->list[args->num++] = xstrdup(buf);
args->list[args->num] = NULL;
}