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$");
  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 char *
  65 unbracket(char *cp)
  66 {
  67         char *ep;
  68
  69         if (*cp == '[') {
  70                 ep = cp + (strlen(cp) - 1);
  71                 if (*ep == ']') {
  72                         *ep = '\0';
  73                         ++cp;
  74                 }
  75         }
  76         return (cp);
  77 }
  78
  79 void
  80 verifydir(cp)
  81         char *cp;
  82 {
  83         struct stat stb;
  84
  85         if (!stat(cp, &stb)) {
  86                 if (S_ISDIR(stb.st_mode))
  87                         return;
  88                 errno = ENOTDIR;
  89         }
  90         run_err("%s: %s", cp, strerror(errno));
  91         exit(1);
  92 }
  93
  94 int
  95 okname(cp0)
  96         char *cp0;
  97 {
  98         int c;
  99         unsigned char *cp;
 100
 101         cp = (unsigned char *)cp0;
 102         do {
 103                 c = *cp;
 104                 if (c & 0200)
 105                         goto bad;
 106                 if (!isalpha(c) && !isdigit(c) && c != '_' && c != '-')
 107                         goto bad;
 108         } while (*++cp);
 109         return (1);
 110
 111 bad:    warnx("%s: invalid user name", cp0);
 112         return (0);
 113 }
 114
 115 int
 116 susystem(s)
 117         char *s;
 118 {
 119         void (*istat)(int), (*qstat)(int);
 120         int status;
 121         pid_t pid;
 122
 123         pid = fork();
 124         switch (pid) {
 125         case -1:
 126                 return (127);
 127
 128         case 0:
 129                 execl(_PATH_BSHELL, "sh", "-c", s, NULL);
 130                 _exit(127);
 131         }
 132         istat = signal(SIGINT, SIG_IGN);
 133         qstat = signal(SIGQUIT, SIG_IGN);
 134         if (waitpid(pid, &status, 0) < 0)
 135                 status = -1;
 136         (void)signal(SIGINT, istat);
 137         (void)signal(SIGQUIT, qstat);
 138         return (status);
 139 }
 140
 141 #ifndef roundup
 142 #define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
 143 #endif
 144
 145 BUF *
 146 allocbuf(bp, fd, blksize)
 147         BUF *bp;
 148         int fd, blksize;
 149 {
 150         struct stat stb;
 151         size_t size;
 152         char *p;
 153
 154         if (fstat(fd, &stb) < 0) {
 155                 run_err("fstat: %s", strerror(errno));
 156                 return (0);
 157         }
 158         size = roundup(stb.st_blksize, blksize);
 159         if (size == 0)
 160                 size = blksize;
 161         if (bp->cnt >= size)
 162                 return (bp);
 163         if ((p = realloc(bp->buf, size)) == NULL) {
 164                 if (bp->buf)
 165                         free(bp->buf);
 166                 bp->buf = NULL;
 167                 bp->cnt = 0;
 168                 run_err("%s", strerror(errno));
 169                 return (0);
 170         }
 171         memset(p, 0, size);
 172         bp->buf = p;
 173         bp->cnt = size;
 174         return (bp);
 175 }
 176
 177 void
 178 lostconn(signo)
 179         int signo;
 180 {
 181         if (!iamremote)
 182                 warnx("lost connection");
 183         exit(1);
 184 }