Altra roba connessa con le pipe

[gapil.git] / sources / BarCode.c

diff --git a/sources/BarCode.c b/sources/BarCode.c
index 138e23ab5d3908538afeccfaea03d2018d13211b..44a08dab1a0924c7296cf20bbcf9bd686353b80b 100644 (file)
--- a/sources/BarCode.c
+++ b/sources/BarCode.c
@@ -18,7 +18,7 @@
  */
 /****************************************************************
  *
- * Program echod 
+ * Program barcode 
  * CGI for barcode generation
  *
  * Author: Simone Piccardi
@@ -29,7 +29,7 @@
  * http://localhost/cgi-bin/barcode?string
  * where string is the code to be converted
  *
- * $Id: BarCode.c,v 1.1 2002/06/18 22:11:06 piccardi Exp $ 
+ * $Id: BarCode.c,v 1.3 2002/06/23 22:03:28 piccardi Exp $ 
  *
  ****************************************************************/
 /* 
@@ -57,81 +57,23 @@ int main(int argc, char *argv[], char *envp[])
 /*
  * Variables definition         
  */
-    char buffer[8192];
-    pid_t pid;
-    size_t n;
-    int retval;
-    int pipein[2];
-    int pipeout[2];
-    char size[]="-pA9";
-    char psize[]="-sPAPERSIZE=a9";
+    FILE *file1, *file2, *file3;
     char content[]="Content-type: image/jpeg\n\n";
     /* 
      * 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 ppm 
-        * 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 ppm to gif using ppmtogif
-     */
-    close(pipein[0]);        /* close input side of input pipe */
-    n=write(pipein[1], argv[1], strlen(argv[1]));
-    close(pipein[1]);
-    waitpid(pid, NULL, 0);
-    /* 
-     * refork to use ppmtogif
-     */
-    pid = fork();
-    if (pid == -1) {
-       WriteMess("child creation error");
-       exit(0);
-    }
-    /*
-     * second child, convert ppm to gif
-     */
-    if (pid == 0) {
-       /* send mime type */
-       close(pipeout[1]);
-       dup2(pipeout[0], STDIN_FILENO);
-       write(STDOUT_FILENO, content, strlen(content));
-       n=read(pipeout[0], buffer, sizeof(buffer));
-       printf("Letti %n di %n, %s\n", n, sizeof(buffer), buffer);
-       exit(0);
-       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);
 }
 /*