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