0.8.9claws18

[claws.git] / src / plugins / spamassassin / utils.c

diff --git a/src/plugins/spamassassin/utils.c b/src/plugins/spamassassin/utils.c
index e21280832ebcc46f6898dff96070a5d90b809ac3..62d9c688dd301c1ce0656e51b21ba9c1fc807dd6 100644 (file)
--- a/src/plugins/spamassassin/utils.c
+++ b/src/plugins/spamassassin/utils.c
@@ -1,13 +1,18 @@
 /*
  * This code is copyright 2001 by Craig Hughes
  * Portions copyright 2002 by Brad Jorsch
- * It is licensed for use with SpamAssassin according to the terms of the Perl Artistic License
- * The text of this license is included in the SpamAssassin distribution in the file named "License"
+ * It is licensed under the same license as Perl itself.  The text of this
+ * license is included in the SpamAssassin distribution in the file named
+ * "License".
  */
 
 #include <unistd.h>
 #include <errno.h>
-
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+#include <stdio.h>
 #include "utils.h"
 
 /* Dec 13 2001 jm: added safe full-read and full-write functions.  These
@@ -16,17 +21,62 @@
  */
 /* Aug 14, 2002 bj: EINTR and EAGAIN aren't fatal, are they? */
 /* Aug 14, 2002 bj: moved these to utils.c */
+/* Jan 13, 2003 ym: added timeout functionality */
+
+typedef void    sigfunc(int);   /* for signal handlers */
+
+sigfunc* sig_catch(int sig, void (*f)(int))
+{
+  struct sigaction act, oact;
+  act.sa_handler = f;
+  act.sa_flags = 0;
+  sigemptyset(&act.sa_mask);
+  sigaction(sig, &act, &oact);
+  return oact.sa_handler;
+}
+
+static void catch_alrm(int x) {
+  /* dummy */
+}
+
+ssize_t timeout_read(ssize_t (*reader)(int d, void *buf, size_t nbytes),
+                     int fd, void *buf, size_t nbytes) {
+  ssize_t nred;
+  sigfunc* sig;
+
+  sig = sig_catch(SIGALRM, catch_alrm);
+  if (libspamc_timeout > 0) {
+    alarm(libspamc_timeout);
+  }
+
+  do {
+    nred = reader(fd, buf, nbytes);
+  } while(nred < 0 && errno == EAGAIN);
+
+  if(nred < 0 && errno == EINTR)
+    errno = ETIMEDOUT;
+
+  if (libspamc_timeout > 0) {
+    alarm(0);
+  }
+
+  /* restore old signal handler */
+  sig_catch(SIGALRM, sig);
+
+  return nred;
+}
+
 int
 full_read (int fd, unsigned char *buf, int min, int len)
 {
   int total;
   int thistime;
 
+
   for (total = 0; total < min; ) {
-    thistime = read (fd, buf+total, len-total);
+    thistime = timeout_read (read, fd, buf+total, len-total);
 
     if (thistime < 0) {
-      if(EINTR == errno || EAGAIN == errno) continue;
       return -1;
     } else if (thistime == 0) {
       /* EOF, but we didn't read the minimum.  return what we've read