Changeset 670 for trunk/kernel/syscalls/sys_display.c

Timestamp:

Nov 19, 2020, 11:45:52 PM (3 years ago)

Author:

alain

Message:

1) Introduce up to 4 command lines arguments in the KSH "load" command.
These arguments are transfered to the user process through the
argc/argv mechanism, using the user space "args" vseg.

2) Introduce the named and anonymous "pipes", for inter-process communication
through the pipe() and mkfifo() syscalls.

3) Introduce the "chat" application to validate the two above mechanisms.

4) Improve printk() and assert() fonctions in printk.c.

File:

• trunk/kernel/syscalls/sys_display.c (modified) (4 diffs)

trunk/kernel/syscalls/sys_display.c

@@ -58 +58 @@
     else if( type == DISPLAY_FAT               ) return "FAT";
     else if( type == DISPLAY_SOCKET            ) return "SOCKET";
+    else if( type == DISPLAY_FD                ) return "FD";
+    else if( type == DISPLAY_WINDOWS           ) return "WINDOWS";
     else                                         return "undefined";
 }
@@ -500 +502 @@
 
 #if DEBUG_SYSCALLS_ERROR
-printk("\n[ERROR] in %s SOCKET : pid %x not found\n", __FUNCTION__ , pid );
+printk("\n[ERROR] in %s for SOCKET : pid %x not found\n", __FUNCTION__ , pid );
 #endif
                 this->errno = EINVAL;
@@ -513 +515 @@
 
 #if DEBUG_SYSCALLS_ERROR
-printk("\n[ERROR] in %s SOCKET : fdid %d not found\n", __FUNCTION__ , fdid );
+printk("\n[ERROR] in %s for SOCKET : fdid %d not found\n", __FUNCTION__ , fdid );
 #endif
                 this->errno = EINVAL;
@@ -528 +530 @@
             // display socket descriptor on TXT0
             socket_display( XPTR( file_cxy , socket ), NULL );
+
+            break;
+        }
+        ////////////////
+        case DISPLAY_FD:
+        {
+            pid_t   pid   = (pid_t)arg0;
+
+            // get extended pointer on owner process descriptor
+            xptr_t owner_xp = cluster_get_owner_process_from_pid( pid );
+
+            if( owner_xp == XPTR_NULL )
+            {
+
+#if DEBUG_SYSCALLS_ERROR
+printk("\n[ERROR] in %s for FD : pid %x not found\n", __FUNCTION__ , pid );
+#endif
+                this->errno = EINVAL;
+                return -1;
+            }
+
+            // display fd_array on TXT0
+            process_fd_display( owner_xp );
+
+            break;
+        }
+        /////////////////////
+        case DISPLAY_WINDOWS:
+        {
+            pid_t   pid   = (pid_t)arg0;
+
+            if( pid != 0 )  // only one target process
+            {
+                // get extended pointer on owner process descriptor
+                xptr_t owner_xp = cluster_get_owner_process_from_pid( pid );
+
+                if( owner_xp == XPTR_NULL )
+                {
+
+#if DEBUG_SYSCALLS_ERROR
+printk("\n[ERROR] in %s for FD : pid %x not found\n", __FUNCTION__ , pid );
+#endif
+                    this->errno = EINVAL;
+                    return -1;
+                }
+            }
+
+            // display windows state for one, or for all processes
+            dev_fbf_display_windows( pid );
 
             break;