Rework main loop function for piping support

src/functions.c

@@ -12,7 +12,7 @@
 #include "enc.h"
 #include "md5.h"
 
-int process_line(char *line)
+char *process_line(char *line)
 {
     char *tok_srch;
 
@@ -27,7 +27,7 @@ int process_line(char *line)
     /* if line starts with a comment, skip */
     if(strncmp("#",tok_srch,1) == 0) 
     {
-        return 0;
+        return NULL;
     }
 
     /* print function */
@@ -41,7 +41,7 @@ int process_line(char *line)
             if(strtok(NULL, "\"") == NULL)
                 syn_error("ss:error:print syntax error, missing end quote");
 
-            printf("%s\n", parsed);
+            return parsed;
         }
         else
         {
@@ -63,6 +63,7 @@ int process_line(char *line)
            tok_srch[strlen(tok_srch)-1] = 0;
         }
         sleep(atoi(tok_srch));
+        return NULL;
     }
 
     /* ss encrypt function */
@@ -79,7 +80,7 @@ int process_line(char *line)
         {
             char *encrp;
             encrp = ss_encrypt(var_conv);
-            printf("%s\n", encrp);
+            return encrp;
         }
     }
 
@@ -95,9 +96,9 @@ int process_line(char *line)
         var_conv = parse_vars(tok_srch);
         if(var_conv != NULL)
         {
-            char *encrp;
-            encrp = ss_decrypt(var_conv);
-            printf("%s\n", encrp);
+            char *decrp;
+            decrp = ss_decrypt(var_conv);
+            return decrp;
         }
     }
 
@@ -113,6 +114,7 @@ int process_line(char *line)
         file_line = parse_vars(tok_srch);
         file_md5_val = md5_file(file_line);
         printf("ss:md5: %s, %s\n", file_md5_val, file_line);
+        return NULL;
     }
 
     /* system execute function */
@@ -131,6 +133,7 @@ int process_line(char *line)
         {
             printf("ss:warning:%s exited with error code %d\n", cmd_line, return_val);
         }
+        return NULL;
     }
 
     /* write */
@@ -152,8 +155,7 @@ int process_line(char *line)
         /* Check if file exists and can be opened */
         if(write_file == NULL) 
         {
-            printf("ss:error:cannot write to '%s'.\n", tok_srch);
-            return 1;
+            syn_error("ss:error:write, cannot write to file specified");
         }
 
         /* strtok to the content that will be written to file */
@@ -171,6 +173,7 @@ int process_line(char *line)
         file_content = parse_vars(tok_srch);
         fprintf(write_file, "%s\n", file_content);
         fclose(write_file);
+        return NULL;
     } /* write function */
 
     /* read function */
@@ -196,8 +199,7 @@ int process_line(char *line)
         /* Check if file was opened successfully */
         if(read_file == NULL) 
         {
-            printf("ss: error: failed to open '%s'.\n", tok_srch);
-            return 1;
+            syn_error("ss:error:read, failed to read from file");
         }
 
         while(fgets(read_line, sizeof(read_line), read_file) != NULL) 
@@ -206,6 +208,7 @@ int process_line(char *line)
         }
 
         fclose(read_file);
+        return NULL;
     } /* read function */
 
     else if(strncmp("delete", tok_srch, 6) == 0) {
@@ -222,25 +225,23 @@ int process_line(char *line)
             if(access(del_filename, W_OK) == 0)
             {
                 remove(del_filename);
-                return 0;
+                return NULL;
             }
             else
             {
-                printf("ss: error: '%s' is not accessible", del_filename);
-                return 1;
+                syn_error("ss:error:delete, file is not accessible");
             }
         }
         else
         {
-            printf("ss: error: '%s' not found", del_filename);
-            return 1;
+            syn_error("ss:error:delete, file not found");
         }
     }
 
     else if(strcmp(tok_srch, "\n") != 0 && strcmp(tok_srch, "") != 0) {
         if(tok_srch[strlen(tok_srch)-1] == '\n')
         {
-            return 1;
+            return NULL;
         } 
         else
         {
@@ -253,5 +254,5 @@ int process_line(char *line)
         }
     }
 
-    return 0;
+    return NULL;
 }

src/functions.h

@@ -5,4 +5,4 @@
     View README file supplied with this software for more details
 */
 
-int process_line(char *line);
+char *process_line(char *line);

src/main.c

@@ -34,11 +34,14 @@ int main(int argc, char **argv)
 	/* Run while loop if file is empty. */
 	if(script != NULL) 
 	{
-			
 		/* parse each line from the script in order. */
 		while(fgets(script_line, sizeof(script_line), script) != NULL) 
 		{
-			process_line(script_line);
+            char *return_dat;
+			return_dat = process_line(script_line);
+            if(return_dat == NULL) continue;
+            // If return is not null, provide the return
+            printf("%s\n", return_dat);
 		} /* end of while */
 	} /* file null */