varie su read/pread/dup/dup2 ecc.

[gapil.git] / sources / BarCode.c

diff --git a/sources/BarCode.c b/sources/BarCode.c
index 138e23ab5d3908538afeccfaea03d2018d13211b..7852dae397a3bd165cab915e290b7743516f121e 100644 (file)
--- a/sources/BarCode.c
+++ b/sources/BarCode.c
@@ -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 1.2 2002/06/21 22:24:10 piccardi Exp $ 
  *
  ****************************************************************/
 /* 
@@ -57,15 +57,12 @@ 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";
     char content[]="Content-type: image/jpeg\n\n";
+    char size[]="-pA9";
     /* 
      * Begin
      */
@@ -88,7 +85,7 @@ int main(int argc, char *argv[], char *envp[])
     if (pid == 0) {
        /*
         * Child exec barcode program, that take input (string to encode)
-        * from pipein, remapped to stdin, and write the output (a ppm 
+        * 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 */
@@ -100,14 +97,14 @@ int main(int argc, char *argv[], char *envp[])
     /*
      * 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
+     * then fork to convert PS to JPEG using gs
      */
     close(pipein[0]);        /* close input side of input pipe */
-    n=write(pipein[1], argv[1], strlen(argv[1]));
+    write(pipein[1], argv[1], strlen(argv[1]));
     close(pipein[1]);
     waitpid(pid, NULL, 0);
     /* 
-     * refork to use ppmtogif
+     * refork to use gs
      */
     pid = fork();
     if (pid == -1) {
@@ -115,16 +112,13 @@ int main(int argc, char *argv[], char *envp[])
        exit(0);
     }
     /*
-     * second child, convert ppm to gif
+     * 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));
-       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);
     }
     /*