Aggiunte i listati per poter usare le modifiche di Mirko, con la generazione

separata delle figure con gli esempi di codice. Qui ci va tutto quello che
prima era messo in un environment lstlisting

diff --git a/listati/ForkTest.c b/listati/ForkTest.c
new file mode 100644 (file)
index 0000000..3ca965f
--- /dev/null
+++ b/listati/ForkTest.c
@@ -0,0 +1,44 @@
+#include <errno.h>       /* error definitions and routines */ 
+#include <stdlib.h>      /* C standard library */
+#include <unistd.h>      /* unix standard library */
+#include <stdio.h>       /* standard I/O library */
+#include <string.h>      /* string functions */
+
+/* Help printing routine */
+void usage(void);
+
+int main(int argc, char *argv[])
+{
+/* 
+ * Variables definition  
+ */
+    int nchild, i;
+    pid_t pid;
+    int wait_child  = 0;
+    int wait_parent = 0;
+    int wait_end    = 0;
+    ...        /* handling options */
+    nchild = atoi(argv[optind]);
+    printf("Test for forking %d child\n", nchild);
+    /* loop to fork children */
+    for (i=0; i<nchild; i++) {
+        if ( (pid = fork()) < 0) { 
+            /* on error exit */ 
+            printf("Error on %d child creation, %s\n", i+1, strerror(errno));
+            exit(-1); 
+        }
+        if (pid == 0) {   /* child */
+            printf("Child %d successfully executing\n", ++i);
+            if (wait_child) sleep(wait_child);
+            printf("Child %d, parent %d, exiting\n", i, getppid());
+            exit(0);
+        } else {          /* parent */
+            printf("Spawned %d child, pid %d \n", i+1, pid);
+            if (wait_parent) sleep(wait_parent);
+            printf("Go to next child \n");
+        }
+    }
+    /* normal exit */
+    if (wait_end) sleep(wait_end);
+    return 0;
+}

diff --git a/listati/char_list.c b/listati/char_list.c
new file mode 100644 (file)
index 0000000..0044b02
--- /dev/null
+++ b/listati/char_list.c
@@ -0,0 +1 @@
+    char *arg0, char *arg1,  ..., char *argn, NULL

diff --git a/listati/env_ptr.c b/listati/env_ptr.c
new file mode 100644 (file)
index 0000000..80bd95b
--- /dev/null
+++ b/listati/env_ptr.c
@@ -0,0 +1 @@
+    extern char ** environ;

diff --git a/listati/exec_sample.c b/listati/exec_sample.c
new file mode 100644 (file)
index 0000000..e9f719c
--- /dev/null
+++ b/listati/exec_sample.c
@@ -0,0 +1 @@
+    int execl(const char *path, const char *arg, ...);

diff --git a/listati/main_def.c b/listati/main_def.c
new file mode 100644 (file)
index 0000000..f653bde
--- /dev/null
+++ b/listati/main_def.c
@@ -0,0 +1 @@
+    int main (int argc, char *argv[])

diff --git a/listati/option_code.c b/listati/option_code.c
new file mode 100644 (file)
index 0000000..7918bb7
--- /dev/null
+++ b/listati/option_code.c
@@ -0,0 +1,28 @@
+    opterr = 0;  /* don't want writing to stderr */
+    while ( (i = getopt(argc, argv, "hp:c:e:")) != -1) {
+        switch (i) {
+        /* 
+         * Handling options 
+         */ 
+        case 'h':   /* help option */
+            printf("Wrong -h option use\n");
+            usage();
+            return -1;
+            break;
+        case 'c':   /* take wait time for children */
+            wait_child = strtol(optarg, NULL, 10);    /* convert input */
+            break;
+        case 'p':   /* take wait time for children */
+            wait_parent = strtol(optarg, NULL, 10);   /* convert input */
+            break;
+        case 'e':   /* take wait before parent exit */
+            wait_end = strtol(optarg, NULL, 10);      /* convert input */
+            break;
+        case '?':   /* unrecognized options */
+            printf("Unrecognized options -%c\n",optopt);
+            usage();
+        default:    /* should not reached */
+            usage();
+        }
+    }
+    debug("Optind %d, argc %d\n",optind,argc);

diff --git a/listati/pi.c b/listati/pi.c
new file mode 100644 (file)
index 0000000..1ded269
--- /dev/null
+++ b/listati/pi.c
@@ -0,0 +1 @@
+     double pi = 3.14;

diff --git a/listati/vect.c b/listati/vect.c
new file mode 100644 (file)
index 0000000..87641d6
--- /dev/null
+++ b/listati/vect.c
@@ -0,0 +1 @@
+    int vect[100];