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 1.26 2005/02/25 23:07:38 dtucker 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_NANOSLEEP) && !defined(HAVE_NSLEEP)
 126 int nanosleep(const struct timespec *req, struct timespec *rem)
 127 {
 128         int rc, saverrno;
 129         extern int errno;
 130         struct timeval tstart, tstop, tremain, time2wait;
 131
 132         TIMESPEC_TO_TIMEVAL(&time2wait, req)
 133         (void) gettimeofday(&tstart, NULL);
 134         rc = select(0, NULL, NULL, NULL, &time2wait);
 135         if (rc == -1) {
 136                 saverrno = errno;
 137                 (void) gettimeofday (&tstop, NULL);
 138                 errno = saverrno;
 139                 tremain.tv_sec = time2wait.tv_sec -
 140                         (tstop.tv_sec - tstart.tv_sec);
 141                 tremain.tv_usec = time2wait.tv_usec -
 142                         (tstop.tv_usec - tstart.tv_usec);
 143                 tremain.tv_sec += tremain.tv_usec / 1000000L;
 144                 tremain.tv_usec %= 1000000L;
 145         } else {
 146                 tremain.tv_sec = 0;
 147                 tremain.tv_usec = 0;
 148         }
 149         TIMEVAL_TO_TIMESPEC(&tremain, rem)
 150
 151         return(rc);
 152 }
 153 #endif
 154
 155 #ifndef HAVE_TCGETPGRP
 156 pid_t
 157 tcgetpgrp(int fd)
 158 {
 159         int ctty_pgrp;
 160
 161         if (ioctl(fd, TIOCGPGRP, &ctty_pgrp) == -1)
 162                 return(-1);
 163         else
 164                 return(ctty_pgrp);
 165 }
 166 #endif /* HAVE_TCGETPGRP */
 167
 168 #ifndef HAVE_TCSENDBREAK
 169 int
 170 tcsendbreak(int fd, int duration)
 171 {
 172 # if defined(TIOCSBRK) && defined(TIOCCBRK)
 173         struct timeval sleepytime;
 174
 175         sleepytime.tv_sec = 0;
 176         sleepytime.tv_usec = 400000;
 177         if (ioctl(fd, TIOCSBRK, 0) == -1)
 178                 return (-1);
 179         (void)select(0, 0, 0, 0, &sleepytime);
 180         if (ioctl(fd, TIOCCBRK, 0) == -1)
 181                 return (-1);
 182         return (0);
 183 # else
 184         return -1;
 185 # endif
 186 }
 187 #endif /* HAVE_TCSENDBREAK */
 188
 189 mysig_t
 190 mysignal(int sig, mysig_t act)
 191 {
 192 #ifdef HAVE_SIGACTION
 193         struct sigaction sa, osa;
 194
 195         if (sigaction(sig, NULL, &osa) == -1)
 196                 return (mysig_t) -1;
 197         if (osa.sa_handler != act) {
 198                 memset(&sa, 0, sizeof(sa));
 199                 sigemptyset(&sa.sa_mask);
 200                 sa.sa_flags = 0;
 201 #ifdef SA_INTERRUPT
 202                 if (sig == SIGALRM)
 203                         sa.sa_flags |= SA_INTERRUPT;
 204 #endif
 205                 sa.sa_handler = act;
 206                 if (sigaction(sig, &sa, NULL) == -1)
 207                         return (mysig_t) -1;
 208         }
 209         return (osa.sa_handler);
 210 #else
 211         #undef signal
 212         return (signal(sig, act));
 213 #endif
 214 }