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-rw-r--r--openbsd-compat/bsd-misc.c440
1 files changed, 440 insertions, 0 deletions
diff --git a/openbsd-compat/bsd-misc.c b/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];
+# ifdef HAVE_FUTIMES
+ int ret, oflags = O_WRONLY;
+# endif
+
+ 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(path, 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 chmod(path, mode);
+# 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
+
+#ifndef HAVE_LOCALTIME_R
+struct tm *
+localtime_r(const time_t *timep, struct tm *result)
+{
+ struct tm *tm = localtime(timep);
+ *result = *tm;
+ return result;
+}
+#endif