src/tests/create-symlinks.c

   1 /*
   2  * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan
   3  * (Royal Institute of Technology, Stockholm, Sweden).
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  *
  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  *
  17  * 3. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #endif
  37
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <sys/types.h>
  42 #include <sys/stat.h>
  43 #include <fcntl.h>
  44 #include <unistd.h>
  45 #include <dirent.h>
  46 #include <limits.h>
  47
  48 #include <err.h>
  49
  50 #define CONTENT_STRING "kaka"
  51
  52 static FILE *verbose_fp = NULL;
  53
  54 static int
  55 creat_symlinks(int count)
  56 {
  57     int ret;
  58     int i;
  59
  60     fprintf(verbose_fp, "creating:");
  61
  62     for (i = 0; i < count; ++i) {
  63         char num[17];
  64
  65         fprintf(verbose_fp, " c%d", i);
  66         fflush(verbose_fp);
  67
  68         snprintf(num, sizeof(num), "%d", i);
  69
  70         ret = symlink(CONTENT_STRING, num);
  71         if (ret < 0)
  72             err(1, "symlink %s", num);
  73     }
  74     fprintf(verbose_fp, "\n");
  75     return 0;
  76 }
  77
  78 #ifndef MAXPATHLEN
  79 #ifdef PATH_MAX
  80 #define MAXPATHLEN PATH_MAX
  81 #else
  82 #define MAXPATHLEN 4096
  83 #endif
  84 #endif
  85
  86 static int
  87 verify_contents(int count)
  88 {
  89     int ret, i;
  90     char file[MAXPATHLEN];
  91     char content[MAXPATHLEN];
  92
  93     fprintf(verbose_fp, "reading:");
  94     for (i = 0; i < count; i++) {
  95         fprintf(verbose_fp, " r%d", i);
  96         fflush(verbose_fp);
  97
  98         snprintf(file, sizeof(file), "%d", i);
  99         ret = readlink(file, content, sizeof(content) - 1);
 100         if (ret < 0)
 101             err(1, "readlink: %d", i);
 102         content[ret] = '\0';
 103         if (strcmp(CONTENT_STRING, content) != 0)
 104             errx(1, "%s != %s", content, CONTENT_STRING);
 105     }
 106     fprintf(verbose_fp, "\n");
 107     return 0;
 108 }
 109
 110 static void
 111 usage(int ret)
 112 {
 113     fprintf(stderr, "%s number-of-symlinks\n", __progname);
 114     exit(ret);
 115 }
 116
 117 int
 118 main(int argc, char **argv)
 119 {
 120     char *ptr;
 121     int count;
 122
 123
 124     if (argc != 2)
 125         usage(1);
 126
 127     verbose_fp = fdopen(4, "w");
 128     if (verbose_fp == NULL) {
 129         verbose_fp = fopen("/dev/null", "w");
 130         if (verbose_fp == NULL)
 131             err(1, "fopen");
 132     }
 133
 134     count = strtol(argv[1], &ptr, 0);
 135     if (count == 0 && ptr == argv[1])
 136         errx(1, "'%s' not a number", argv[1]);
 137
 138     return creat_symlinks(count) || verify_contents(count);
 139 }