src/tests/intr-read.c

   1 /*
   2  * Copyright (c) 2001 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 <signal.h>
  42 #include <errno.h>
  43 #include <dirent.h>
  44
  45 #include <sys/types.h>
  46 #include <sys/stat.h>
  47 #include <fcntl.h>
  48 #include <unistd.h>
  49
  50
  51 #include <err.h>
  52
  53 #ifndef MAXPATHLEN
  54 #ifdef PATH_MAX
  55 #define MAXPATHLEN PATH_MAX
  56 #else
  57 #define MAXPATHLEN 4096
  58 #endif
  59 #endif
  60
  61 static sig_atomic_t set_alarm = 1;
  62
  63 static void
  64 sigalrm(int foo)
  65 {
  66     signal(SIGALRM, sigalrm);
  67     set_alarm = 1;
  68 }
  69
  70 static void
  71 try_read(const char *filename)
  72 {
  73     int fd;
  74
  75     fd = open(filename, O_RDONLY);
  76     if (fd < 0) {
  77         if (errno == EINTR)
  78             err(1, "open %s was interrupted", filename);
  79     } else {
  80         close(fd);
  81     }
  82 }
  83
  84 static void
  85 find(const char *dirname)
  86 {
  87     DIR *dir;
  88     struct dirent *dp;
  89
  90     dir = opendir(dirname);
  91     if (dir == NULL)
  92         err(1, "opendir %s", dirname);
  93     while ((dp = readdir(dir)) != NULL) {
  94         char fname[MAXPATHLEN];
  95         struct stat sb;
  96
  97         if (set_alarm) {
  98             alarm(1);
  99             set_alarm = 0;
 100         }
 101         if (strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0)
 102             continue;
 103         snprintf(fname, sizeof(fname), "%s/%s", dirname, dp->d_name);
 104         if (lstat(fname, &sb) < 0)
 105             err(1, "stat %s", fname);
 106         if (S_ISDIR(sb.st_mode))
 107             find(fname);
 108         else
 109             try_read(fname);
 110     }
 111     closedir(dir);
 112 }
 113
 114 int
 115 main(int argc, char **argv)
 116 {
 117     struct sigaction sa;
 118
 119     sa.sa_handler = sigalrm;
 120     sigfillset(&sa.sa_mask);
 121     sa.sa_flags = 0;
 122     sigaction(SIGALRM, &sa, NULL);
 123     while (--argc)
 124         find(*++argv);
 125     return 0;
 126 }