crypto/openssh-3.9p1/openbsd-compat/bsd-misc.c

   1
   2 /*
   3  * Copyright (c) 1999-2004 Damien Miller <djm@mindrot.org>
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #include "includes.h"
  19 #include "xmalloc.h"
  20
  21 RCSID("$Id: bsd-misc.c,v 1.25 2004/08/15 08:41:00 djm Exp $");
  22
  23 #ifndef HAVE___PROGNAME
  24 char *__progname;
  25 #endif
  26
  27 /*
  28  * NB. duplicate __progname in case it is an alias for argv[0]
  29  * Otherwise it may get clobbered by setproctitle()
  30  */
  31 char *ssh_get_progname(char *argv0)
  32 {
  33 #ifdef HAVE___PROGNAME
  34         extern char *__progname;
  35
  36         return xstrdup(__progname);
  37 #else
  38         char *p;
  39
  40         if (argv0 == NULL)
  41                 return ("unknown");     /* XXX */
  42         p = strrchr(argv0, '/');
  43         if (p == NULL)
  44                 p = argv0;
  45         else
  46                 p++;
  47
  48         return (xstrdup(p));
  49 #endif
  50 }
  51
  52 #ifndef HAVE_SETLOGIN
  53 int setlogin(const char *name)
  54 {
  55         return (0);
  56 }
  57 #endif /* !HAVE_SETLOGIN */
  58
  59 #ifndef HAVE_INNETGR
  60 int innetgr(const char *netgroup, const char *host,
  61             const char *user, const char *domain)
  62 {
  63         return (0);
  64 }
  65 #endif /* HAVE_INNETGR */
  66
  67 #if !defined(HAVE_SETEUID) && defined(HAVE_SETREUID)
  68 int seteuid(uid_t euid)
  69 {
  70         return (setreuid(-1, euid));
  71 }
  72 #endif /* !defined(HAVE_SETEUID) && defined(HAVE_SETREUID) */
  73
  74 #if !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID)
  75 int setegid(uid_t egid)
  76 {
  77         return(setresgid(-1, egid, -1));
  78 }
  79 #endif /* !defined(HAVE_SETEGID) && defined(HAVE_SETRESGID) */
  80
  81 #if !defined(HAVE_STRERROR) && defined(HAVE_SYS_ERRLIST) && defined(HAVE_SYS_NERR)
  82 const char *strerror(int e)
  83 {
  84         extern int sys_nerr;
  85         extern char *sys_errlist[];
  86
  87         if ((e >= 0) && (e < sys_nerr))
  88                 return (sys_errlist[e]);
  89
  90         return ("unlisted error");
  91 }
  92 #endif
  93
  94 #ifndef HAVE_UTIMES
  95 int utimes(char *filename, struct timeval *tvp)
  96 {
  97         struct utimbuf ub;
  98
  99         ub.actime = tvp[0].tv_sec;
 100         ub.modtime = tvp[1].tv_sec;
 101
 102         return (utime(filename, &ub));
 103 }
 104 #endif
 105
 106 #ifndef HAVE_TRUNCATE
 107 int truncate(const char *path, off_t length)
 108 {
 109         int fd, ret, saverrno;
 110
 111         fd = open(path, O_WRONLY);
 112         if (fd < 0)
 113                 return (-1);
 114
 115         ret = ftruncate(fd, length);
 116         saverrno = errno;
 117         close(fd);
 118         if (ret == -1)
 119                 errno = saverrno;
 120
 121         return(ret);
 122 }
 123 #endif /* HAVE_TRUNCATE */
 124
 125 #if !defined(HAVE_SETGROUPS) && defined(SETGROUPS_NOOP)
 126 /*
 127  * Cygwin setgroups should be a noop.
 128  */
 129 int
 130 setgroups(size_t size, const gid_t *list)
 131 {
 132         return (0);
 133 }
 134 #endif
 135
 136 #if !defined(HAVE_NANOSLEEP) && !defined(HAVE_NSLEEP)
 137 int nanosleep(const struct timespec *req, struct timespec *rem)
 138 {
 139         int rc, saverrno;
 140         extern int errno;
 141         struct timeval tstart, tstop, tremain, time2wait;
 142
 143         TIMESPEC_TO_TIMEVAL(&time2wait, req)
 144         (void) gettimeofday(&tstart, NULL);
 145         rc = select(0, NULL, NULL, NULL, &time2wait);
 146         if (rc == -1) {
 147                 saverrno = errno;
 148                 (void) gettimeofday (&tstop, NULL);
 149                 errno = saverrno;
 150                 tremain.tv_sec = time2wait.tv_sec -
 151                         (tstop.tv_sec - tstart.tv_sec);
 152                 tremain.tv_usec = time2wait.tv_usec -
 153                         (tstop.tv_usec - tstart.tv_usec);
 154                 tremain.tv_sec += tremain.tv_usec / 1000000L;
 155                 tremain.tv_usec %= 1000000L;
 156         } else {
 157                 tremain.tv_sec = 0;
 158                 tremain.tv_usec = 0;
 159         }
 160         TIMEVAL_TO_TIMESPEC(&tremain, rem)
 161
 162         return(rc);
 163 }
 164 #endif
 165
 166 #ifndef HAVE_TCGETPGRP
 167 pid_t
 168 tcgetpgrp(int fd)
 169 {
 170         int ctty_pgrp;
 171
 172         if (ioctl(fd, TIOCGPGRP, &ctty_pgrp) == -1)
 173                 return(-1);
 174         else
 175                 return(ctty_pgrp);
 176 }
 177 #endif /* HAVE_TCGETPGRP */
 178
 179 #ifndef HAVE_TCSENDBREAK
 180 int
 181 tcsendbreak(int fd, int duration)
 182 {
 183 # if defined(TIOCSBRK) && defined(TIOCCBRK)
 184         struct timeval sleepytime;
 185
 186         sleepytime.tv_sec = 0;
 187         sleepytime.tv_usec = 400000;
 188         if (ioctl(fd, TIOCSBRK, 0) == -1)
 189                 return (-1);
 190         (void)select(0, 0, 0, 0, &sleepytime);
 191         if (ioctl(fd, TIOCCBRK, 0) == -1)
 192                 return (-1);
 193         return (0);
 194 # else
 195         return -1;
 196 # endif
 197 }
 198 #endif /* HAVE_TCSENDBREAK */
 199
 200 mysig_t
 201 mysignal(int sig, mysig_t act)
 202 {
 203 #ifdef HAVE_SIGACTION
 204         struct sigaction sa, osa;
 205
 206         if (sigaction(sig, NULL, &osa) == -1)
 207                 return (mysig_t) -1;
 208         if (osa.sa_handler != act) {
 209                 memset(&sa, 0, sizeof(sa));
 210                 sigemptyset(&sa.sa_mask);
 211                 sa.sa_flags = 0;
 212 #ifdef SA_INTERRUPT
 213                 if (sig == SIGALRM)
 214                         sa.sa_flags |= SA_INTERRUPT;
 215 #endif
 216                 sa.sa_handler = act;
 217                 if (sigaction(sig, &sa, NULL) == -1)
 218                         return (mysig_t) -1;
 219         }
 220         return (osa.sa_handler);
 221 #else
 222         #undef signal
 223         return (signal(sig, act));
 224 #endif
 225 }