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openssh/openbsd-compat/bsd-misc.c

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/*
* Copyright (c) 1999-2004 Damien Miller <djm@mindrot.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "includes.h"
#include <sys/types.h>
#ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#include <fcntl.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#ifndef HAVE___PROGNAME
char *__progname;
#endif
/*
* NB. duplicate __progname in case it is an alias for argv[0]
* Otherwise it may get clobbered by setproctitle()
*/
char *ssh_get_progname(char *argv0)
{
char *p, *q;
#ifdef HAVE___PROGNAME
extern char *__progname;
p = __progname;
#else
if (argv0 == NULL)
return ("unknown"); /* XXX */
p = strrchr(argv0, '/');
if (p == NULL)
p = argv0;
else
p++;
#endif
if ((q = strdup(p)) == NULL) {
perror("strdup");
exit(1);
}
return q;
}
#ifndef HAVE_SETLOGIN
int setlogin(const char *name)
{
return (0);
}
#endif /* !HAVE_SETLOGIN */
#ifndef HAVE_INNETGR
int innetgr(const char *netgroup, const char *host,
const char *user, const char *domain)
{
return (0);
}
#endif /* HAVE_INNETGR */
#if !defined(HAVE_SETEUID) && defined(HAVE_SETREUID)
int seteuid(uid_t euid)
{
return (setreuid(-1, euid));
}
#endif /* !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) */
#if !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID)
int setegid(uid_t egid)
{
return(setresgid(-1, egid, -1));
}
#endif /* !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID) */
#if !defined(HAVE_STRERROR) && defined(HAVE_SYS_ERRLIST) && defined(HAVE_SYS_NERR)
const char *strerror(int e)
{
extern int sys_nerr;
extern char *sys_errlist[];
if ((e >= 0) && (e < sys_nerr))
return (sys_errlist[e]);
return ("unlisted error");
}
#endif
#ifndef HAVE_UTIMES
int utimes(char *filename, struct timeval *tvp)
{
struct utimbuf ub;
ub.actime = tvp[0].tv_sec;
ub.modtime = tvp[1].tv_sec;
return (utime(filename, &ub));
}
#endif
#ifndef HAVE_UTIMENSAT
/*
* A limited implementation of utimensat() that only implements the
* functionality used by OpenSSH, currently only AT_FDCWD and
* AT_SYMLINK_NOFOLLOW.
*/
int
utimensat(int fd, const char *path, const struct timespec times[2],
int flag)
{
struct timeval tv[2];
int ret, oflags = O_WRONLY;
tv[0].tv_sec = times[0].tv_sec;
tv[0].tv_usec = times[0].tv_nsec / 1000;
tv[1].tv_sec = times[1].tv_sec;
tv[1].tv_usec = times[1].tv_nsec / 1000;
if (fd != AT_FDCWD) {
errno = ENOSYS;
return -1;
}
# ifndef HAVE_FUTIMES
return utimes(path, tv);
# else
# ifdef O_NOFOLLOW
if (flag & AT_SYMLINK_NOFOLLOW)
oflags |= O_NOFOLLOW;
# endif /* O_NOFOLLOW */
if ((fd = open(path, oflags)) == -1)
return -1;
ret = futimes(fd, tv);
close(fd);
return ret;
# endif
}
#endif
#ifndef HAVE_FCHOWNAT
/*
* A limited implementation of fchownat() that only implements the
* functionality used by OpenSSH, currently only AT_FDCWD and
* AT_SYMLINK_NOFOLLOW.
*/
int
fchownat(int fd, const char *path, uid_t owner, gid_t group, int flag)
{
int ret, oflags = O_WRONLY;
if (fd != AT_FDCWD) {
errno = ENOSYS;
return -1;
}
# ifndef HAVE_FCHOWN
return chown(pathname, owner, group);
# else
# ifdef O_NOFOLLOW
if (flag & AT_SYMLINK_NOFOLLOW)
oflags |= O_NOFOLLOW;
# endif /* O_NOFOLLOW */
if ((fd = open(path, oflags)) == -1)
return -1;
ret = fchown(fd, owner, group);
close(fd);
return ret;
# endif
}
#endif
#ifndef HAVE_FCHMODAT
/*
* A limited implementation of fchmodat() that only implements the
* functionality used by OpenSSH, currently only AT_FDCWD and
* AT_SYMLINK_NOFOLLOW.
*/
int
fchmodat(int fd, const char *path, mode_t mode, int flag)
{
int ret, oflags = O_WRONLY;
if (fd != AT_FDCWD) {
errno = ENOSYS;
return -1;
}
# ifndef HAVE_FCHMOD
return chown(pathname, owner, group);
# else
# ifdef O_NOFOLLOW
if (flag & AT_SYMLINK_NOFOLLOW)
oflags |= O_NOFOLLOW;
# endif /* O_NOFOLLOW */
if ((fd = open(path, oflags)) == -1)
return -1;
ret = fchmod(fd, mode);
close(fd);
return ret;
# endif
}
#endif
#ifndef HAVE_TRUNCATE
int truncate(const char *path, off_t length)
{
int fd, ret, saverrno;
fd = open(path, O_WRONLY);
if (fd < 0)
return (-1);
ret = ftruncate(fd, length);
saverrno = errno;
close(fd);
if (ret == -1)
errno = saverrno;
return(ret);
}
#endif /* HAVE_TRUNCATE */
#if !defined(HAVE_NANOSLEEP) && !defined(HAVE_NSLEEP)
int nanosleep(const struct timespec *req, struct timespec *rem)
{
int rc, saverrno;
extern int errno;
struct timeval tstart, tstop, tremain, time2wait;
TIMESPEC_TO_TIMEVAL(&time2wait, req)
(void) gettimeofday(&tstart, NULL);
rc = select(0, NULL, NULL, NULL, &time2wait);
if (rc == -1) {
saverrno = errno;
(void) gettimeofday (&tstop, NULL);
errno = saverrno;
tremain.tv_sec = time2wait.tv_sec -
(tstop.tv_sec - tstart.tv_sec);
tremain.tv_usec = time2wait.tv_usec -
(tstop.tv_usec - tstart.tv_usec);
tremain.tv_sec += tremain.tv_usec / 1000000L;
tremain.tv_usec %= 1000000L;
} else {
tremain.tv_sec = 0;
tremain.tv_usec = 0;
}
if (rem != NULL)
TIMEVAL_TO_TIMESPEC(&tremain, rem)
return(rc);
}
#endif
#if !defined(HAVE_USLEEP)
int usleep(unsigned int useconds)
{
struct timespec ts;
ts.tv_sec = useconds / 1000000;
ts.tv_nsec = (useconds % 1000000) * 1000;
return nanosleep(&ts, NULL);
}
#endif
#ifndef HAVE_TCGETPGRP
pid_t
tcgetpgrp(int fd)
{
int ctty_pgrp;
if (ioctl(fd, TIOCGPGRP, &ctty_pgrp) == -1)
return(-1);
else
return(ctty_pgrp);
}
#endif /* HAVE_TCGETPGRP */
#ifndef HAVE_TCSENDBREAK
int
tcsendbreak(int fd, int duration)
{
# if defined(TIOCSBRK) && defined(TIOCCBRK)
struct timeval sleepytime;
sleepytime.tv_sec = 0;
sleepytime.tv_usec = 400000;
if (ioctl(fd, TIOCSBRK, 0) == -1)
return (-1);
(void)select(0, 0, 0, 0, &sleepytime);
if (ioctl(fd, TIOCCBRK, 0) == -1)
return (-1);
return (0);
# else
return -1;
# endif
}
#endif /* HAVE_TCSENDBREAK */
#ifndef HAVE_STRDUP
char *
strdup(const char *str)
{
size_t len;
char *cp;
len = strlen(str) + 1;
cp = malloc(len);
if (cp != NULL)
return(memcpy(cp, str, len));
return NULL;
}
#endif
#ifndef HAVE_ISBLANK
int
isblank(int c)
{
return (c == ' ' || c == '\t');
}
#endif
#ifndef HAVE_GETPGID
pid_t
getpgid(pid_t pid)
{
#if defined(HAVE_GETPGRP) && !defined(GETPGRP_VOID) && GETPGRP_VOID == 0
return getpgrp(pid);
#elif defined(HAVE_GETPGRP)
if (pid == 0)
return getpgrp();
#endif
errno = ESRCH;
return -1;
}
#endif
#ifndef HAVE_PLEDGE
int
pledge(const char *promises, const char *paths[])
{
return 0;
}
#endif
#ifndef HAVE_MBTOWC
/* a mbtowc that only supports ASCII */
int
mbtowc(wchar_t *pwc, const char *s, size_t n)
{
if (s == NULL || *s == '\0')
return 0; /* ASCII is not state-dependent */
if (*s < 0 || *s > 0x7f || n < 1) {
errno = EOPNOTSUPP;
return -1;
}
if (pwc != NULL)
*pwc = *s;
return 1;
}
#endif
#ifndef HAVE_LLABS
long long
llabs(long long j)
{
return (j < 0 ? -j : j);
}
#endif
#ifndef HAVE_BZERO
void
bzero(void *b, size_t n)
{
(void)memset(b, 0, n);
}
#endif
#ifndef HAVE_RAISE
int
raise(int sig)
{
kill(getpid(), sig);
}
#endif
#ifndef HAVE_GETSID
pid_t
getsid(pid_t pid)
{
errno = ENOSYS;
return -1;
}
#endif
#ifdef FFLUSH_NULL_BUG
#undef fflush
int _ssh_compat_fflush(FILE *f)
{
int r1, r2;
if (f == NULL) {
r1 = fflush(stdout);
r2 = fflush(stderr);
if (r1 == -1 || r2 == -1)
return -1;
return 0;
}
return fflush(f);
}
#endif
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