Added conditional compilation for the MD5 hashing.

[finddup.git] / finddup.c

diff --git a/finddup.c b/finddup.c
index ccf21c6..3edfd61 100644 (file)
--- a/finddup.c
+++ b/finddup.c
@@ -40,7 +40,9 @@
 #include <locale.h>
 #include <getopt.h>
 #include <fcntl.h>
+#ifdef WITH_MD5
 #include <openssl/md5.h>
+#endif
 
 /* 1M really helps compared to 64k */
 #define READ_BUFFER_SIZE (1024 * 1024)
@@ -72,7 +74,9 @@ int ignore_same_inode = 0; /* 1 means that comparison between two file
 int tty_width = -1; /* Positive value means what width to use to show
                        the progress bar */
 
+#ifdef WITH_MD5
 int use_md5 = 0; /* 1 means we keep an MD5 signature for each file */
+#endif
 
 /********************************************************************/
 
@@ -105,8 +109,10 @@ struct file_node {
   ino_t inode;
   int group_id; /* one per identical file content */
   int dir_id; /* 1 for DIR1, and 2 for DIR2 */
+#ifdef WITH_MD5
   int md5_computed;
   unsigned char md5[MD5_DIGEST_LENGTH];
+#endif
 };
 
 void file_list_delete(struct file_node *head) {
@@ -133,12 +139,15 @@ int file_list_length(struct file_node *head) {
 int same_content(struct file_node *f1, struct file_node *f2,
                  char *buffer1, char *buffer2) {
   int fd1, fd2, s1, s2;
+
+#ifdef WITH_MD5
   MD5_CTX c1, c2;
 
   if(use_md5) {
-    if(f1->md5_computed && f2->md5_computed &&
-       !memcmp(f1->md5, f2->md5, MD5_DIGEST_LENGTH)) {
-      return 0;
+    if(f1->md5_computed && f2->md5_computed) {
+      if(!memcmp(f1->md5, f2->md5, MD5_DIGEST_LENGTH)) {
+        return 0;
+      }
     } else {
       if(!f1->md5_computed) {
         MD5_Init(&c1);
@@ -148,6 +157,7 @@ int same_content(struct file_node *f1, struct file_node *f2,
       }
     }
   }
+#endif
 
   fd1 = open(f1->name, O_RDONLY);
   fd2 = open(f2->name, O_RDONLY);
@@ -167,6 +177,7 @@ int same_content(struct file_node *f1, struct file_node *f2,
         if(s1 == 0) {
           close(fd1);
           close(fd2);
+#ifdef WITH_MD5
           if(use_md5) {
             if(!f1->md5_computed) {
               MD5_Final(f1->md5, &c1);
@@ -177,8 +188,15 @@ int same_content(struct file_node *f1, struct file_node *f2,
               f2->md5_computed = 1;
             }
           }
+#endif
           return 1;
         } else {
+          if(memcmp(buffer1, buffer2, s1)) {
+            close(fd1);
+            close(fd2);
+            return 0;
+          }
+#ifdef WITH_MD5
           if(use_md5) {
             if(!f1->md5_computed) {
               MD5_Update(&c1, buffer1, s1);
@@ -187,11 +205,7 @@ int same_content(struct file_node *f1, struct file_node *f2,
               MD5_Update(&c2, buffer2, s2);
             }
           }
-          if(memcmp(buffer1, buffer2, s1)) {
-            close(fd1);
-            close(fd2);
-            return 0;
-          }
+#endif
         }
       } else {
         fprintf(stderr,
@@ -266,7 +280,9 @@ struct file_node *scan_directory(struct file_node *tail, const char *name) {
           tmp->inode = sb.st_ino;
           tmp->group_id = -1;
           tmp->dir_id = -1;
+#ifdef WITH_MD5
           tmp->md5_computed = 0;
+#endif
           tail = tmp;
         }
       }
@@ -518,7 +534,9 @@ void print_help(FILE *out) {
   fprintf(out, "   -r, --real-paths           show the real file paths\n");
   fprintf(out, "   -i, --same-inodes-are-different\n");
   fprintf(out, "                              consider files with same inode as different\n");
+#ifdef WITH_MD5
   fprintf(out, "   -m, --md5                  use MD5 hashing\n");
+#endif
   fprintf(out, "\n");
   fprintf(out, "Report bugs and comments to <francois@fleuret.org>.\n");
 }
@@ -582,7 +600,13 @@ int main(int argc, char **argv) {
       break;
 
     case 'm':
+#ifdef WITH_MD5
       use_md5 = 1;
+#else
+      fprintf(stderr,
+              "finddup has not be compiled with MD5 hashing.\n");
+      exit(EXIT_FAILURE);
+#endif
       break;
 
     default: