Only fix if file exist so it can be opened

1 files changed, 21 insertions, 23 deletions

diff --git a/mycan.c b/mycan.c
index e534340..7fdef0c 100644
--- a/mycan.c
+++ b/mycan.c
@@ -89,30 +89,28 @@ int main(int argc, char **argv)
 	// check and fix corrupted .csv file
 	{
 		FILE * fp;
-		char ch;
-		uint32_t offset;
-		int remain;
-		if((fp=fopen(filename,"r"))==NULL)
+		if((fp=fopen(filename,"r"))!=NULL)
 		{
-			fprintf(stderr,"Can't open file \"%s\".\n",filename);
-			exit(1);
-		}
-		fseek(fp,-1L,SEEK_END);
-		fscanf(fp,"%c",&ch);
-		fseek(fp,0L,SEEK_END);
-		offset=ftell(fp);
-		printf("csv file end offset: %d\n",offset);
-		fclose(fp);
-		remain=offset%ENTRY_SIZE;
-		if(remain)
-		{
-			printf("Corrupted .csv file not a multiple of %d, removing last line\n",ENTRY_SIZE);
-			truncate(filename,offset-remain);
-		}
-		else if(ch != '\n')
-		{
-			printf("Corrupted .csv file last char not newline, removing last line\n");
-			truncate(filename,offset-ENTRY_SIZE);
+			char ch;
+			uint32_t offset;
+			int remain;
+			fseek(fp,-1L,SEEK_END);
+			fscanf(fp,"%c",&ch);
+			fseek(fp,0L,SEEK_END);
+			offset=ftell(fp);
+			//printf("csv file end offset: %d\n",offset);
+			fclose(fp);
+			remain=offset%ENTRY_SIZE;
+			if(remain)
+			{
+				printf("Corrupted .csv file not a multiple of %d, removing last line\n",ENTRY_SIZE);
+				truncate(filename,offset-remain);
+			}
+			else if(ch != '\n')
+			{
+				printf("Corrupted .csv file last char not newline, removing last line\n");
+				truncate(filename,offset-ENTRY_SIZE);
+			}
 		}
 	}