X-Git-Url: https://hackdaworld.org/gitweb/?p=my-code%2Fpnx.git;a=blobdiff_plain;f=efp_extract.c;fp=efp_extract.c;h=bf660651453681de8c14ca16abe9b2213a97d4cb;hp=7198ef4bee4804dadabf938b87276aa7da0fd44e;hb=67d2ef0428995b991a7edf32358d63e5e7213b8a;hpb=67d2a6cfaefba4da5210ee179cf93252fde0752a

diff --git a/efp_extract.c b/efp_extract.c
index 7198ef4..bf66065 100644
--- a/efp_extract.c
+++ b/efp_extract.c
@@ -3,7 +3,7 @@
  *
  * author: hackbard@hackdaworld.org
  *
- * build: gcc -Wall efp_extract -o efp_extract
+ * build: gcc -Wall efp_extract.c -o efp_extract
  * usage: ./efp_extract file.efp
  *        chmod 640 file_??
  *
@@ -99,6 +99,10 @@ int main(int argc,char **argv) {
 
 	printf("mapping file into memory ...\n");
 	map=mmap(0,offset[nof-1]+len[nof-1],PROT_READ,MAP_SHARED,fd,0);
+	if(map==MAP_FAILED) {
+		perror("mmap");
+		return -1;
+	}
 
 	for(i=0;i<nof;i++) {