*/
/****************************************************************
*
- * Program echod
+ * Program barcode
* CGI for barcode generation
*
* Author: Simone Piccardi
* http://localhost/cgi-bin/barcode?string
* where string is the code to be converted
*
- * $Id: BarCode.c,v 1.2 2002/06/21 22:24:10 piccardi Exp $
+ * $Id: BarCode.c,v 1.3 2002/06/23 22:03:28 piccardi Exp $
*
****************************************************************/
/*
/*
* Variables definition
*/
- pid_t pid;
- int retval;
- int pipein[2];
- int pipeout[2];
+ FILE *file1, *file2, *file3;
char content[]="Content-type: image/jpeg\n\n";
- char size[]="-pA9";
/*
* Begin
*/
- /* create two pipes to handle process communication */
- if ( (retval = pipe(pipein)) ) {
- WriteMess("input pipe creation error");
- exit(0);
- }
- if ( (retval = pipe(pipeout)) ) {
- WriteMess("output pipe creation error");
- exit(0);
- }
- /* fork child to run barcode program */
- pid = fork();
- if (pid == -1) {
- WriteMess("child creation error");
- exit(0);
- }
- /* if child */
- if (pid == 0) {
- /*
- * Child exec barcode program, that take input (string to encode)
- * from pipein, remapped to stdin, and write the output (a PS
- * image) to stdout, remapped to pipeout
- */
- close(pipein[1]); /* close output side of input pipe */
- 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);
- }
- /*
- * Parent write string to pipe input and close it,
- * then wait child execution and results form pipeout,
- * then fork to convert PS to JPEG using gs
- */
- close(pipein[0]); /* close input side of input pipe */
- write(pipein[1], argv[1], strlen(argv[1]));
- close(pipein[1]);
- waitpid(pid, NULL, 0);
- /*
- * refork to use gs
- */
- pid = fork();
- if (pid == -1) {
- WriteMess("child creation error");
- exit(0);
- }
- /*
- * second child, convert PS to JPEG
- */
- if (pid == 0) {
- /* send mime type */
- close(pipeout[1]);
- dup2(pipeout[0], STDIN_FILENO);
- write(STDOUT_FILENO, content, strlen(content));
- execlp("gs", "gs", "-q", "-sDEVICE=jpeg", "-sOutputFile=-", "-", NULL);
- }
- /*
- * still parent
- */
- close(pipeout[1]);
- waitpid(pid, NULL, 0);
+ /* write mime-type to stout */
+ write(STDOUT_FILENO, content, strlen(content));
+ /* convert PDF to JPEG */
+ file1 = popen("gs -q -sDEVICE=jpeg -sOutputFile=- -", "w");
+ /* convert EPS to PDF*/
+ dup2(fileno(file1), STDOUT_FILENO); /* set epstopdf stdout to file1 */
+ file2 = popen("epstopdf --filter", "w");
+// file2 = popen("eps2eps", "w");
+ /* create barcode */
+ dup2(fileno(file2), STDOUT_FILENO); /* set barcode stdout to file2 */
+ file3 = popen("barcode -E", "w");
+ write(fileno(file3), argv[1], strlen(argv[1]));
exit(0);
}
/*