X-Git-Url: https://gapil.gnulinux.it/gitweb/?p=gapil.git;a=blobdiff_plain;f=sources%2FBarCodePage.c;h=419e9c0e1898ae9dacd460716dba303d9f70ce4d;hp=ef48ce77bcd4d2d6c2fb43e7e9673d47b935fc08;hb=af52f000f3956b58885a317c51faaa57aa543472;hpb=247c7ba624f39b283f9e85816c0616348f39c1b6

diff --git a/sources/BarCodePage.c b/sources/BarCodePage.c
index ef48ce7..419e9c0 100644
--- a/sources/BarCodePage.c
+++ b/sources/BarCodePage.c
@@ -1,4 +1,4 @@
-/* BarCodeOld.c
+/* BarCodePage.c
  * 
  * Copyright (C) 2002 Simone Piccardi
  * 
@@ -29,7 +29,7 @@
  * http://localhost/cgi-bin/barcode?string
  * where string is the code to be converted
  *
- * $Id: BarCodePage.c,v 1.1 2002/06/30 13:26:17 piccardi Exp $ 
+ * $Id: BarCodePage.c,v 1.2 2002/08/10 14:22:53 piccardi Exp $ 
  *
  ****************************************************************/
 /* 
@@ -38,7 +38,6 @@
 #include <sys/types.h>   /* predefined types */
 #include <sys/stat.h>    /* stat deinitiions */
 #include <unistd.h>      /* include unix standard library */
-/* */
 #include <stdio.h>	 /* include standard I/O library */
 #include <stdlib.h>	 /* include standard library */
 #include <string.h>	 /* include string library */
@@ -50,7 +49,6 @@
 #include"macros.h"
 void WriteMess(char *mess);
 
-
 /* Program begin */
 int main(int argc, char *argv[], char *envp[])
 {
@@ -66,7 +64,7 @@ int main(int argc, char *argv[], char *envp[])
     /* 
      * Begin
      */
-    /* create two pipes to handle process communication */
+    /* create two pipes, pipein and pipeout, to handle communication */
     if ( (retval = pipe(pipein)) ) {
 	WriteMess("input pipe creation error");
 	exit(0);	
@@ -75,11 +73,10 @@ int main(int argc, char *argv[], char *envp[])
 	WriteMess("output pipe creation error");
 	exit(0);	
     }	 
-    /* fork child to run barcode program */
-    pid = fork();
-    if (pid == -1) {
+    /* First fork: use child to run barcode program */
+    if ( (pid = fork()) == -1 ) {
 	WriteMess("child creation error");
-	exit(0);	
+	exit(0);
     }
     /* if child */
     if (pid == 0) {
@@ -92,7 +89,7 @@ int main(int argc, char *argv[], char *envp[])
   	dup2(pipein[0], STDIN_FILENO);   /* remap stdin in pipe input */
 	close(pipeout[0]);
 	dup2(pipeout[1], STDOUT_FILENO); /* remap stdout in pipe output */
-	execlp("barcode", "barcode", size, NULL); //"-o", "-",  NULL);
+	execlp("barcode", "barcode", size, NULL); 
     } 
     /*
      * Parent write string to pipe input and close it, 
@@ -103,9 +100,8 @@ int main(int argc, char *argv[], char *envp[])
     write(pipein[1], argv[1], strlen(argv[1]));
     close(pipein[1]);
     waitpid(pid, NULL, 0);
-    /* Second fork use child to run ghostscript*/
-    pid = fork();
-    if (pid == -1) {
+    /* Second fork: use child to run ghostscript*/
+    if ( (pid = fork()) == -1) {
 	WriteMess("child creation error");
 	exit(0);
     }