#include <config.h>
-/* This allows the architecture-specific .h files to specify the use
- of stdargs regardless of __STDC__. */
-#ifndef WGET_USE_STDARG
-/* Use stdarg only if the compiler supports ANSI C and stdarg.h is
- present. We check for both because there are configurations where
- stdarg.h exists, but doesn't work. */
-# ifdef __STDC__
-# ifdef HAVE_STDARG_H
-# define WGET_USE_STDARG
-# endif
-# endif
-#endif /* not WGET_USE_STDARG */
-
#include <stdio.h>
#ifdef HAVE_STRING_H
# include <string.h>
FILE *fp;
check_redirect_output ();
- if (!(fp = get_log_fp ()))
+ if ((fp = get_log_fp ()) == NULL)
return;
CHECK_VERBOSE (o);
fflush (fp);
}
\f
+/* String escape functions. */
+
+/* Return the number of non-printable characters in SOURCE.
+
+ Non-printable characters are determined as per safe-ctype.h,
+ i.e. the non-printable characters of the "C" locale. This code is
+ meant to be used to protect the user from binary characters in
+ (normally ASCII) server messages. */
+
+static int
+count_nonprint (const char *source)
+{
+ const char *p;
+ int cnt;
+ for (p = source, cnt = 0; *p; p++)
+ if (!ISPRINT (*p))
+ ++cnt;
+ return cnt;
+}
+
+/* Copy SOURCE to DEST, escaping non-printable characters. If FOR_URI
+ is 0, they are escaped as \ooo; otherwise, they are escaped as
+ %xx.
+
+ DEST must point to a location with sufficient room to store an
+ encoded version of SOURCE. */
+
+static void
+copy_and_escape (const char *source, char *dest, int for_uri)
+{
+ const char *from;
+ char *to;
+
+ /* Copy the string, escaping non-printable chars. */
+ if (!for_uri)
+ {
+ for (from = source, to = dest; *from; from++)
+ if (ISPRINT (*from))
+ *to++ = *from;
+ else
+ {
+ const unsigned char c = *from;
+ *to++ = '\\';
+ *to++ = '0' + (c >> 6);
+ *to++ = '0' + ((c >> 3) & 7);
+ *to++ = '0' + (c & 7);
+ }
+ }
+ else
+ {
+ for (from = source, to = dest; *from; from++)
+ if (ISPRINT (*from))
+ *to++ = *from;
+ else
+ {
+ const unsigned char c = *from;
+ *to++ = '%';
+ *to++ = XNUM_TO_DIGIT (c >> 4);
+ *to++ = XNUM_TO_DIGIT (c & 0xf);
+ }
+ }
+ *to = '\0';
+}
+
+#define RING_SIZE 3
+struct ringel {
+ char *buffer;
+ int size;
+};
+
+static const char *
+escnonprint_internal (const char *str, int for_uri)
+{
+ static struct ringel ring[RING_SIZE]; /* ring data */
+ static int ringpos; /* current ring position */
+
+ int nprcnt = count_nonprint (str);
+ if (nprcnt == 0)
+ /* If there are no non-printable chars in STR, don't bother
+ copying anything, just return STR. */
+ return str;
+
+ {
+ /* Set up a pointer to the current ring position, so we can write
+ simply r->X instead of ring[ringpos].X. */
+ struct ringel *r = ring + ringpos;
+
+ /* Every non-printable character is replaced with "\ooo",
+ i.e. with three *additional* chars (two in URI-mode). Size
+ must also include the length of the original string and an
+ additional char for the terminating \0. */
+ int needed_size = strlen (str) + 1 + for_uri ? (2 * nprcnt) : (3 * nprcnt);
+
+ /* If the current buffer is uninitialized or too small,
+ (re)allocate it. */
+ if (r->buffer == NULL || r->size < needed_size)
+ r->buffer = xrealloc (r->buffer, needed_size);
+
+ copy_and_escape (str, r->buffer, for_uri);
+ ringpos = (ringpos + 1) % RING_SIZE;
+ return r->buffer;
+ }
+}
+
+/* Return a pointer to a static copy of STR with the non-printable
+ characters escaped as \ooo. If there are no non-printable
+ characters in STR, STR is returned.
+
+ NOTE: since this function can return a pointer to static data, be
+ careful to copy its result before calling it again. However, to be
+ more useful with printf, it maintains an internal ring of static
+ buffers to return. Currently the ring size is 3, which means you
+ can print up to three values in the same printf; if more is needed,
+ bump RING_SIZE. */
+
+const char *
+escnonprint (const char *str)
+{
+ return escnonprint_internal (str, 0);
+}
+
+/* Return a pointer to a static copy of STR with the non-printable
+ characters escaped as %XX. If there are no non-printable
+ characters in STR, STR is returned.
+
+ This function returns a pointer to static data which will be
+ overwritten by subsequent calls -- see escnonprint for details. */
+
+const char *
+escnonprint_uri (const char *str)
+{
+ return escnonprint_internal (str, 1);
+}
+\f
/* When SIGHUP or SIGUSR1 are received, the output is redirected
elsewhere. Such redirection is only allowed once. */
enum { RR_NONE, RR_REQUESTED, RR_DONE } redirect_request = RR_NONE;
static void
redirect_output (void)
{
- char *logfile = unique_name (DEFAULT_LOGFILE, 0);
- fprintf (stderr, _("\n%s received, redirecting output to `%s'.\n"),
- redirect_request_signal_name, logfile);
- logfp = fopen (logfile, "w");
- if (!logfp)
+ char *logfile;
+ logfp = unique_create (DEFAULT_LOGFILE, 0, &logfile);
+ if (logfp)
+ {
+ fprintf (stderr, _("\n%s received, redirecting output to `%s'.\n"),
+ redirect_request_signal_name, logfile);
+ xfree (logfile);
+ /* Dump the context output to the newly opened log. */
+ log_dump_context ();
+ }
+ else
{
/* Eek! Opening the alternate log file has failed. Nothing we
can do but disable printing completely. */
+ fprintf (stderr, _("\n%s received.\n"), redirect_request_signal_name);
fprintf (stderr, _("%s: %s; disabling logging.\n"),
logfile, strerror (errno));
inhibit_logging = 1;
}
- else
- {
- /* Dump the context output to the newly opened log. */
- log_dump_context ();
- }
- xfree (logfile);
save_context_p = 0;
}
projects / wget / blobdiff