usr/bin/cp/cp.c

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This source file includes following definitions.
main
usage
copy
   1 /*
   2  * Copyright (c) 1988, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * David Hitz of Auspex Systems Inc.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  */
  32 
  33 /* modified by Kohsuke Ohtani for Prex. */
  34 
  35 #include <sys/stat.h>
  36 #include <sys/fcntl.h>
  37 
  38 #include <unistd.h>
  39 #include <err.h>
  40 #include <string.h>
  41 #include <stdlib.h>
  42 #include <errno.h>
  43 #include <limits.h>
  44 #include <stdio.h>
  45 
  46 #ifdef CMDBOX
  47 #define main(argc, argv)        cp_main(argc, argv)
  48 #endif
  49 
  50 static void usage(void);
  51 static int copy(char *from, char *to, int dirflag);
  52 
  53 
  54 static char *iobuf;
  55 
  56 int
  57 main(int argc, char *argv[])
  58 {
  59         int r, ch, checkch, i, iflag = 0;
  60         char *target;
  61         struct stat to_stat, tmp_stat;
  62 
  63         while ((ch = getopt(argc, argv, "")) != -1)
  64                 switch(ch) {
  65                 case '?':
  66                 default:
  67                         usage();
  68                 }
  69         argc -= optind;
  70         argv += optind;
  71 
  72         if (argc < 2)
  73                 usage();
  74 
  75         if ((iobuf = malloc(BUFSIZ)) == NULL)
  76                 err(1, NULL);
  77 
  78         target = argv[--argc];
  79 
  80         r = stat(target, &to_stat);
  81         if (r == -1 && errno != ENOENT)
  82                 err(1, "%s", target);
  83         if (r == -1 || !S_ISDIR(to_stat.st_mode)) {
  84                 /*
  85                  * File to file
  86                  */
  87                 if (argc > 1)
  88                         usage();
  89 
  90                 if (stat(argv[0], &tmp_stat) == -1) {
  91                         warn("%s", argv[0]);
  92                         exit(1);
  93                 }
  94                 if (!S_ISREG(tmp_stat.st_mode))
  95                         usage();
  96 
  97                 /* interactive mode */
  98                 if (r != -1 && iflag) {
  99                         (void)fprintf(stderr, "overwrite %s? ", target);
 100                         checkch = ch = getchar();
 101                         while (ch != '\n' && ch != EOF)
 102                                 ch = getchar();
 103                         if (checkch != 'y')
 104                                 exit(0);
 105                 }
 106                 r = copy(argv[0], target, 0);
 107         } else {
 108                 /*
 109                  * File(s) to directory
 110                  */
 111                 r = 0;
 112                 for (i = 0; i < argc; i++)
 113                         r = copy(argv[i], target, 1);
 114         }
 115         free(iobuf);
 116         exit(r);
 117 }
 118 
 119 static void
 120 usage(void)
 121 {
 122         fprintf(stderr, "usage: cp src target\n"
 123                 "       cp src1 ... srcN directory\n");
 124         exit(1);
 125         /* NOTREACHED */
 126 }
 127 
 128 static int
 129 copy(char *from, char *to, int dirflag)
 130 {
 131         char path[PATH_MAX];
 132         int fold, fnew, n;
 133         struct stat stbuf;
 134         mode_t mode;
 135         char *p;
 136 
 137         if (dirflag) {
 138                 p = strrchr(from, '/');
 139                 p = p ? p + 1 : from;
 140                 strlcpy(path, to, sizeof(path));
 141                 if (strcmp(to, "/"))
 142                         strlcat(path, "/", sizeof(path));
 143                 strlcat(path, p, sizeof(path));
 144                 to = path;
 145         }
 146 
 147         if ((fold = open(from, O_RDONLY)) == -1) {
 148                 warn("%s", from);
 149                 return 1;
 150         }
 151         fstat(fold, &stbuf);
 152         mode = stbuf.st_mode;
 153 
 154         if ((fnew = creat(to, mode)) == -1) {
 155                 warn("%s", to);
 156                 close(fold);
 157                 return 1;
 158         }
 159         while ((n = read(fold, iobuf, BUFSIZ)) > 0) {
 160                 if (write(fnew, iobuf, (size_t)n) != n) {
 161                         warn("%s", to);
 162                         close(fold);
 163                         close(fnew);
 164                         return 1;
 165                 }
 166         }
 167         close(fold);
 168         close(fnew);
 169         return 0;
 170 }
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root/usr/bin/cp/cp.c

DEFINITIONS
