Changeset 2419 for trunk/packages/vizservers/pymolproxy/pymolproxy.c

Timestamp:

Aug 26, 2011, 11:06:14 AM (13 years ago)

Author:

gah

Message:

 

File:

• trunk/packages/vizservers/pymolproxy/pymolproxy.c (modified) (5 diffs)

trunk/packages/vizservers/pymolproxy/pymolproxy.c

@@ -107 +107 @@
 
 typedef struct Image {
-    struct Image *nextPtr;      /* Next image in chain of images. The list is
-                                 * ordered by the most recently received image
-                                 * from the pymol server to the least. */
-    struct Image *prevPtr;      /* Previous image in chain of images. The list
-                                 * is ordered by the most recently received
-                                 * image from the pymol server to the
-                                 * least. */
-    ssize_t nWritten;           /* Number of bytes of image data already
-                                 * delivered.*/
-    size_t bytesLeft;           /* Number of bytes of image data left to
-                                 * delivered to the client. */
-    char data[1];               /* Start of image data. We allocate the size
-                                 * of the Image structure plus the size of the
-                                 * image data. */
+    struct Image *nextPtr;              /* Next image in chain of images. The
+                                         * list is ordered by the most
+                                         * recently received image from the
+                                         * pymol server to the least. */
+    struct Image *prevPtr;              /* Previous image in chain of
+                                         * images. The list is ordered by the
+                                         * most recently received image from
+                                         * the pymol server to the least. */
+    ssize_t nWritten;                   /* Number of bytes of image data
+                                         * already delivered.*/
+    size_t bytesLeft;                   /* Number of bytes of image data left
+                                         * to delivered to the client. */
+    char data[1];                       /* Start of image data. We allocate
+                                         * the size of the Image structure
+                                         * plus the size of the image data. */
 } Image;
 
@@ -2075 +2076 @@
     close(proxy.sin);
 
-    status = waitpid(child, &result, WNOHANG);
-    if (status == -1) {
+    if (waitpid(child, &result, 0) < 0) {
         ERROR("error waiting on pymol server to exit: %s", strerror(errno));
-    } else if (status == 0) {
-        ERROR("attempting to signal (SIGTERM) pymol server.");
-        kill(-child, SIGTERM);          // Kill process group
-        alarm(5);
-        status = waitpid(child, &result, 0);
-        alarm(0);
-        
-        while ((status == -1) && (errno == EINTR)) {
-            ERROR("Attempting to signal (SIGKILL) pymol server.");
-            kill(-child, SIGKILL);      // Kill process group
-            alarm(10);
-            status = waitpid(child, &result, 0);
-            alarm(0); 
-        }
-    }
+    }
+    INFO("attempting to signal (SIGTERM) pymol server.");
+    kill(-child, SIGTERM);              // Kill process group
+    alarm(5);
     
-    ERROR("pymol server process ended (result=%d)", result);
+    if (waitpid(child, &result, 0) < 0) {
+        ERROR("error waiting on pymol server to exit after SIGTERM: %s", 
+              strerror(errno));
+    }
+    status = -1;
+    while ((status == -1) && (errno == EINTR)) {
+        ERROR("Attempting to signal (SIGKILL) pymol server.");
+        kill(-child, SIGKILL);  // Kill process group
+        alarm(10);
+        status = waitpid(child, &result, 0);
+        alarm(0); 
+    }
+    INFO("pymol server process ended (result=%d)", result);
+
     DestroyTmpDir();
-
     Tcl_DeleteInterp(interp);
     
@@ -2117 +2118 @@
     fcntl(proxyPtr->cin, F_SETFL, flags|O_NONBLOCK);
 
-    pollResults[0].fd = proxyPtr->cout;
-    pollResults[1].fd = proxyPtr->sout;
-    pollResults[2].fd = proxyPtr->serr;
+    /* Read file descriptors. */
+    pollResults[0].fd = proxyPtr->cout; /* Client standard output  */
+    pollResults[1].fd = proxyPtr->sout; /* Server standard error.  */
+    pollResults[2].fd = proxyPtr->serr; /* Server standard error.  */
     pollResults[0].events = pollResults[1].events = 
         pollResults[2].events = POLLIN;
 
-    pollResults[3].fd = proxyPtr->cin;
+    /* Write file descriptors. */
+    pollResults[3].fd = proxyPtr->cin;  /* Client standard input. */
     pollResults[3].events = POLLOUT;
 
@@ -2163 +2166 @@
             } else {
                 ERROR("Failed reading pymol stdout (nBytes=%d)\n", nBytes);
-                goto error;     /* Get out on EOF or error. */
+                goto error;             /* Get out on EOF or error. */
             }
         }
@@ -2180 +2183 @@
                 if (errno != EINTR) { 
                     ERROR("lost connection (stderr) to pymol server.");
-                    return;
+                    goto error;
                 }
             }