crypto/heimdal-0.6.3/appl/rcp/util.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if 0
  35 #ifndef lint
  36 #if 0
  37 static char sccsid[] = "@(#)util.c      8.2 (Berkeley) 4/2/94";
  38 #endif
  39 static const char rcsid[] =
  40   "$FreeBSD: src/bin/rcp/util.c,v 1.9 1999/08/27 23:14:58 peter Exp $";
  41 #endif /* not lint */
  42 #endif
  43
  44 #include "rcp_locl.h"
  45
  46 RCSID("$Id: util.c,v 1.6 2001/09/04 14:35:58 assar Exp $");
  47
  48 char *
  49 colon(cp)
  50         char *cp;
  51 {
  52         if (*cp == ':')         /* Leading colon is part of file name. */
  53                 return (0);
  54
  55         for (; *cp; ++cp) {
  56                 if (*cp == ':')
  57                         return (cp);
  58                 if (*cp == '/')
  59                         return (0);
  60         }
  61         return (0);
  62 }
  63
  64 void
  65 verifydir(cp)
  66         char *cp;
  67 {
  68         struct stat stb;
  69
  70         if (!stat(cp, &stb)) {
  71                 if (S_ISDIR(stb.st_mode))
  72                         return;
  73                 errno = ENOTDIR;
  74         }
  75         run_err("%s: %s", cp, strerror(errno));
  76         exit(1);
  77 }
  78
  79 int
  80 okname(cp0)
  81         char *cp0;
  82 {
  83         int c;
  84         char *cp;
  85
  86         cp = cp0;
  87         do {
  88                 c = *cp;
  89                 if (c & 0200)
  90                         goto bad;
  91                 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
  92                         goto bad;
  93         } while (*++cp);
  94         return (1);
  95
  96 bad:    warnx("%s: invalid user name", cp0);
  97         return (0);
  98 }
  99
 100 int
 101 susystem(s, userid)
 102         int userid;
 103         char *s;
 104 {
 105         void (*istat)(int), (*qstat)(int);
 106         int status;
 107         pid_t pid;
 108
 109         pid = fork();
 110         switch (pid) {
 111         case -1:
 112                 return (127);
 113
 114         case 0:
 115                 (void)setuid(userid);
 116                 execl(_PATH_BSHELL, "sh", "-c", s, NULL);
 117                 _exit(127);
 118         }
 119         istat = signal(SIGINT, SIG_IGN);
 120         qstat = signal(SIGQUIT, SIG_IGN);
 121         if (waitpid(pid, &status, 0) < 0)
 122                 status = -1;
 123         (void)signal(SIGINT, istat);
 124         (void)signal(SIGQUIT, qstat);
 125         return (status);
 126 }
 127
 128 #ifndef roundup
 129 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 130 #endif
 131
 132 BUF *
 133 allocbuf(bp, fd, blksize)
 134         BUF *bp;
 135         int fd, blksize;
 136 {
 137         struct stat stb;
 138         size_t size;
 139         char *p;
 140
 141         if (fstat(fd, &stb) < 0) {
 142                 run_err("fstat: %s", strerror(errno));
 143                 return (0);
 144         }
 145         size = roundup(stb.st_blksize, blksize);
 146         if (size == 0)
 147                 size = blksize;
 148         if (bp->cnt >= size)
 149                 return (bp);
 150         if ((p = realloc(bp->buf, size)) == NULL) {
 151                 if (bp->buf)
 152                         free(bp->buf);
 153                 bp->buf = NULL;
 154                 bp->cnt = 0;
 155                 run_err("%s", strerror(errno));
 156                 return (0);
 157         }
 158         memset(p, 0, size);
 159         bp->buf = p;
 160         bp->cnt = size;
 161         return (bp);
 162 }
 163
 164 void
 165 lostconn(signo)
 166         int signo;
 167 {
 168         if (!iamremote)
 169                 warnx("lost connection");
 170         exit(1);
 171 }