# include <termios.h>
#endif
+/* Needed for run_with_timeout. */
+#undef USE_SIGNAL_TIMEOUT
+#ifdef HAVE_SIGNAL_H
+# include <signal.h>
+#endif
+#ifdef HAVE_SETJMP_H
+# include <setjmp.h>
+#endif
+/* If sigsetjmp is a macro, configure won't pick it up. */
+#ifdef sigsetjmp
+# define HAVE_SIGSETJMP
+#endif
+#ifdef HAVE_SIGNAL
+# ifdef HAVE_SIGSETJMP
+# define USE_SIGNAL_TIMEOUT
+# endif
+# ifdef HAVE_SIGBLOCK
+# define USE_SIGNAL_TIMEOUT
+# endif
+#endif
+
#include "wget.h"
#include "utils.h"
#include "fnmatch.h"
return NULL;
}
+/* Return non-zero if FNAME ends with a typical HTML suffix. The
+ following (case-insensitive) suffixes are presumed to be HTML files:
+
+ html
+ htm
+ ?html (`?' matches one character)
+
+ #### CAVEAT. This is not necessarily a good indication that FNAME
+ refers to a file that contains HTML! */
+int
+has_html_suffix_p (const char *fname)
+{
+ char *suf;
+
+ if ((suf = suffix (fname)) == NULL)
+ return 0;
+ if (!strcasecmp (suf, "html"))
+ return 1;
+ if (!strcasecmp (suf, "htm"))
+ return 1;
+ if (suf[0] && !strcasecmp (suf + 1, "html"))
+ return 1;
+ return 0;
+}
+
/* Read a line from FP and return the pointer to freshly allocated
storage. The stoarage space is obtained through malloc() and
should be freed with free() when it is no longer needed.
return res;
}
#endif
+\f
+/* Implementation of run_with_timeout, a generic timeout handler for
+ systems with Unix-like signal handling. */
+#ifdef HAVE_SIGSETJMP
+#define SETJMP(env) sigsetjmp (env, 1)
+
+static sigjmp_buf run_with_timeout_env;
+
+static RETSIGTYPE
+abort_run_with_timeout (int sig)
+{
+ assert (sig == SIGALRM);
+ siglongjmp (run_with_timeout_env, -1);
+}
+#else /* not HAVE_SIGSETJMP */
+#define SETJMP(env) setjmp (env)
+
+static jmp_buf run_with_timeout_env;
+
+static RETSIGTYPE
+abort_run_with_timeout (int sig)
+{
+ assert (sig == SIGALRM);
+ /* We don't have siglongjmp to preserve the set of blocked signals;
+ if we longjumped out of the handler at this point, SIGALRM would
+ remain blocked. We must unblock it manually. */
+ int mask = siggetmask ();
+ mask &= ~sigmask(SIGALRM);
+ sigsetmask (mask);
+
+ /* Now it's safe to longjump. */
+ longjmp (run_with_timeout_env, -1);
+}
+#endif /* not HAVE_SIGSETJMP */
+
+int
+run_with_timeout (long timeout, void (*fun) (void *), void *arg)
+{
+#ifndef USE_SIGNAL_TIMEOUT
+ fun (arg);
+ return 0;
+#else
+ int saved_errno;
+
+ if (timeout == 0)
+ {
+ fun (arg);
+ return 0;
+ }
+
+ signal (SIGALRM, abort_run_with_timeout);
+ if (SETJMP (run_with_timeout_env) != 0)
+ {
+ /* Longjumped out of FUN with a timeout. */
+ signal (SIGALRM, SIG_DFL);
+ return 1;
+ }
+ alarm (timeout);
+ fun (arg);
+
+ /* Preserve errno in case alarm() or signal() modifies it. */
+ saved_errno = errno;
+ alarm (0);
+ signal (SIGALRM, SIG_DFL);
+ errno = saved_errno;
+
+ return 0;
+#endif
+}
+