You should have received a copy of the GNU General Public License
along with Wget; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+In addition, as a special exception, the Free Software Foundation
+gives permission to link the code of its release of Wget with the
+OpenSSL project's "OpenSSL" library (or with modified versions of it
+that use the same license as the "OpenSSL" library), and distribute
+the linked executables. You must obey the GNU General Public License
+in all respects for all of the code used other than "OpenSSL". If you
+modify this file, you may extend this exception to your version of the
+file, but you are not obligated to do so. If you do not wish to do
+so, delete this exception statement from your version. */
#include <config.h>
#endif
#include <fcntl.h>
#include <assert.h>
+
+/* For TIOCGWINSZ and friends: */
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
+#ifdef HAVE_TERMIOS_H
+# 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"
static void
memfatal (const char *what)
{
- /* HACK: expose save_log_p from log.c, so we can turn it off in
- order to prevent saving the log. Saving the log is dangerous
- because logprintf() and logputs() can call malloc(), so this
- could infloop. When logging is turned off, infloop can no longer
- happen.
-
- #### This is no longer really necessary because the new routines
- in log.c cons only if the line exceeds eighty characters. But
- this can come at the end of a line, so it's OK to be careful.
-
- On a more serious note, it would be good to have a
- log_forced_shutdown() routine that exposes this cleanly. */
- extern int save_log_p;
-
- save_log_p = 0;
+ /* Make sure we don't try to store part of the log line, and thus
+ call malloc. */
+ log_set_save_context (0);
logprintf (LOG_ALWAYS, _("%s: %s: Not enough memory.\n"), exec_name, what);
exit (1);
}
else if (pid != 0)
{
/* parent, no error */
- printf (_("Continuing in background.\n"));
+ printf (_("Continuing in background, pid %d.\n"), (int)pid);
if (changedp)
printf (_("Output will be written to `%s'.\n"), opt.lfilename);
- exit (0);
+ exit (0); /* #### should we use _exit()? */
}
- /* child: keep running */
-}
-#endif /* not WINDOWS */
-\f
-#if 0
-/* debug */
-char *
-ps (char *orig)
-{
- char *r = xstrdup (orig);
- path_simplify (r);
- return r;
-}
-#endif
-
-/* Canonicalize PATH, and return a new path. The new path differs from PATH
- in that:
- Multple `/'s are collapsed to a single `/'.
- Leading `./'s and trailing `/.'s are removed.
- Trailing `/'s are removed.
- Non-leading `../'s and trailing `..'s are handled by removing
- portions of the path.
-
- E.g. "a/b/c/./../d/.." will yield "a/b". This function originates
- from GNU Bash.
-
- Changes for Wget:
- Always use '/' as stub_char.
- Don't check for local things using canon_stat.
- Change the original string instead of strdup-ing.
- React correctly when beginning with `./' and `../'.
- Don't zip out trailing slashes. */
-int
-path_simplify (char *path)
-{
- register int i, start;
- int changes = 0;
- char stub_char;
-
- if (!*path)
- return 0;
-
- stub_char = '/';
-
- if (path[0] == '/')
- /* Preserve initial '/'. */
- ++path;
-
- /* Nix out leading `.' or `..' with. */
- if ((path[0] == '.' && path[1] == '\0')
- || (path[0] == '.' && path[1] == '.' && path[2] == '\0'))
- {
- path[0] = '\0';
- changes = 1;
- return changes;
- }
-
- /* Walk along PATH looking for things to compact. */
- i = 0;
- while (1)
- {
- if (!path[i])
- break;
-
- while (path[i] && path[i] != '/')
- i++;
-
- start = i++;
-
- /* If we didn't find any slashes, then there is nothing left to do. */
- if (!path[start])
- break;
-
- /* Handle multiple `/'s in a row. */
- while (path[i] == '/')
- i++;
-
- if ((start + 1) != i)
- {
- strcpy (path + start + 1, path + i);
- i = start + 1;
- changes = 1;
- }
-
- /* Check for `../', `./' or trailing `.' by itself. */
- if (path[i] == '.')
- {
- /* Handle trailing `.' by itself. */
- if (!path[i + 1])
- {
- path[--i] = '\0';
- changes = 1;
- break;
- }
-
- /* Handle `./'. */
- if (path[i + 1] == '/')
- {
- strcpy (path + i, path + i + 1);
- i = (start < 0) ? 0 : start;
- changes = 1;
- continue;
- }
- /* Handle `../' or trailing `..' by itself. */
- if (path[i + 1] == '.' &&
- (path[i + 2] == '/' || !path[i + 2]))
- {
- while (--start > -1 && path[start] != '/');
- strcpy (path + start + 1, path + i + 2 + (start == -1 && path[i + 2]));
- i = (start < 0) ? 0 : start;
- changes = 1;
- continue;
- }
- } /* path == '.' */
- } /* while */
-
- /* Addition: Remove all `./'-s and `../'-s preceding the string. */
- i = 0;
- while (1)
- {
- if (path[i] == '.' && path[i + 1] == '/')
- i += 2;
- else if (path[i] == '.' && path[i + 1] == '.' && path[i + 2] == '/')
- i += 3;
- else
- break;
- }
- if (i)
- {
- strcpy (path, path + i - 0);
- changes = 1;
- }
-
- return changes;
+ /* child: give up the privileges and keep running. */
+ setsid ();
+ freopen ("/dev/null", "r", stdin);
+ freopen ("/dev/null", "w", stdout);
+ freopen ("/dev/null", "w", stderr);
}
+#endif /* not WINDOWS */
\f
/* "Touch" FILE, i.e. make its atime and mtime equal to the time
specified with TM. */
return S_ISDIR (buf.st_mode) ? 0 : 1;
}
+/* Return the size of file named by FILENAME, or -1 if it cannot be
+ opened or seeked into. */
+long
+file_size (const char *filename)
+{
+ long size;
+ /* We use fseek rather than stat to determine the file size because
+ that way we can also verify whether the file is readable.
+ Inspired by the POST patch by Arnaud Wylie. */
+ FILE *fp = fopen (filename, "rb");
+ fseek (fp, 0, SEEK_END);
+ size = ftell (fp);
+ fclose (fp);
+ return size;
+}
+
/* Return a unique filename, given a prefix and count */
static char *
unique_name_1 (const char *fileprefix, int count)
{
int quit = 0;
int i;
+ int ret = 0;
char *dir;
/* Make a copy of dir, to be able to write to it. Otherwise, the
if (!dir[i])
quit = 1;
dir[i] = '\0';
- /* Check whether the directory already exists. */
+ /* Check whether the directory already exists. Allow creation of
+ of intermediate directories to fail, as the initial path components
+ are not necessarily directories! */
if (!file_exists_p (dir))
- {
- if (mkdir (dir, 0777) < 0)
- return -1;
- }
+ ret = mkdir (dir, 0777);
+ else
+ ret = 0;
if (quit)
break;
else
dir[i] = '/';
}
- return 0;
+ return ret;
}
/* Merge BASE with FILE. BASE can be a directory or a file name, FILE
- should be a file name. For example, file_merge("/foo/bar", "baz")
- will return "/foo/baz". file_merge("/foo/bar/", "baz") will return
- "foo/bar/baz".
+ should be a file name.
+
+ file_merge("/foo/bar", "baz") => "/foo/baz"
+ file_merge("/foo/bar/", "baz") => "/foo/bar/baz"
+ file_merge("foo", "bar") => "bar"
In other words, it's a simpler and gentler version of uri_merge_1. */
const char *cut = (const char *)strrchr (base, '/');
if (!cut)
- cut = base + strlen (base);
+ return xstrdup (file);
result = (char *)xmalloc (cut - base + 1 + strlen (file) + 1);
memcpy (result, base, cut - base);
return 1;
}
-/* Match the end of STRING against PATTERN. For instance:
+/* Return non-zero if STRING ends with TAIL. For instance:
+
+ match_tail ("abc", "bc", 0) -> 1
+ match_tail ("abc", "ab", 0) -> 0
+ match_tail ("abc", "abc", 0) -> 1
+
+ If FOLD_CASE_P is non-zero, the comparison will be
+ case-insensitive. */
- match_backwards ("abc", "bc") -> 1
- match_backwards ("abc", "ab") -> 0
- match_backwards ("abc", "abc") -> 1 */
int
-match_tail (const char *string, const char *pattern)
+match_tail (const char *string, const char *tail, int fold_case_p)
{
int i, j;
- for (i = strlen (string), j = strlen (pattern); i >= 0 && j >= 0; i--, j--)
- if (string[i] != pattern[j])
- break;
- /* If the pattern was exhausted, the match was succesful. */
+ /* We want this to be fast, so we code two loops, one with
+ case-folding, one without. */
+
+ if (!fold_case_p)
+ {
+ for (i = strlen (string), j = strlen (tail); i >= 0 && j >= 0; i--, j--)
+ if (string[i] != tail[j])
+ break;
+ }
+ else
+ {
+ for (i = strlen (string), j = strlen (tail); i >= 0 && j >= 0; i--, j--)
+ if (TOLOWER (string[i]) != TOLOWER (tail[j]))
+ break;
+ }
+
+ /* If the tail was exhausted, the match was succesful. */
if (j == -1)
return 1;
else
{
if (backward)
{
- if (match_tail (s, *accepts))
+ if (match_tail (s, *accepts, 0))
return 1;
}
else
return NULL;
}
-/* Read a line from FP. The function reallocs the storage as needed
- to accomodate for any length of the line. Reallocs are done
- storage exponentially, doubling the storage after each overflow to
- minimize the number of calls to realloc() and fgets(). The newline
- character at the end of line is retained.
+/* 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.
+
+ The length of the line is not limited, except by available memory.
+ The newline character at the end of line is retained. The line is
+ terminated with a zero character.
After end-of-file is encountered without anything being read, NULL
is returned. NULL is also returned on error. To distinguish
read_whole_line (FILE *fp)
{
int length = 0;
- int bufsize = 81;
+ int bufsize = 82;
char *line = (char *)xmalloc (bufsize);
while (fgets (line + length, bufsize - length, fp))
{
length += strlen (line + length);
- assert (length > 0);
+ if (length == 0)
+ /* Possible for example when reading from a binary file where
+ a line begins with \0. */
+ continue;
+
if (line[length - 1] == '\n')
break;
+
/* fgets() guarantees to read the whole line, or to use up the
space we've given it. We can double the buffer
unconditionally. */
{
char inbuf[24];
/* Print the number into the buffer. */
- long_to_string (inbuf, l);
+ number_to_string (inbuf, l);
return legible_1 (inbuf);
}
/* Count the digits in a (long) integer. */
int
-numdigit (long a)
+numdigit (long number)
{
- int res = 1;
- if (a < 0)
+ int cnt = 1;
+ if (number < 0)
{
- a = -a;
- ++res;
+ number = -number;
+ ++cnt;
}
- while ((a /= 10) != 0)
- ++res;
- return res;
+ while ((number /= 10) > 0)
+ ++cnt;
+ return cnt;
}
+/* A half-assed implementation of INT_MAX on machines that don't
+ bother to define one. */
+#ifndef INT_MAX
+# define INT_MAX ((int) ~((unsigned)1 << 8 * sizeof (int) - 1))
+#endif
+
#define ONE_DIGIT(figure) *p++ = n / (figure) + '0'
#define ONE_DIGIT_ADVANCE(figure) (ONE_DIGIT (figure), n %= (figure))
#define DIGITS_18(figure) ONE_DIGIT_ADVANCE (figure); DIGITS_17 ((figure) / 10)
#define DIGITS_19(figure) ONE_DIGIT_ADVANCE (figure); DIGITS_18 ((figure) / 10)
-/* Print NUMBER to BUFFER in base 10. This is completely equivalent
- to `sprintf(buffer, "%ld", number)', only much faster.
+/* Print NUMBER to BUFFER in base 10. This should be completely
+ equivalent to `sprintf(buffer, "%ld", number)', only much faster.
The speedup may make a difference in programs that frequently
convert numbers to strings. Some implementations of sprintf,
particularly the one in GNU libc, have been known to be extremely
slow compared to this function.
- BUFFER should accept as many bytes as you expect the number to take
- up. On machines with 64-bit longs the maximum needed size is 24
- bytes. That includes the worst-case digits, the optional `-' sign,
- and the trailing \0. */
+ Return the pointer to the location where the terminating zero was
+ printed. (Equivalent to calling buffer+strlen(buffer) after the
+ function is done.)
-void
-long_to_string (char *buffer, long number)
+ BUFFER should be big enough to accept as many bytes as you expect
+ the number to take up. On machines with 64-bit longs the maximum
+ needed size is 24 bytes. That includes the digits needed for the
+ largest 64-bit number, the `-' sign in case it's negative, and the
+ terminating '\0'. */
+
+char *
+number_to_string (char *buffer, long number)
{
char *p = buffer;
long n = number;
/* We are running in a strange or misconfigured environment. Let
sprintf cope with it. */
sprintf (buffer, "%ld", n);
+ p += strlen (buffer);
#else /* (SIZEOF_LONG == 4) || (SIZEOF_LONG == 8) */
if (n < 0)
{
+ if (n < -INT_MAX)
+ {
+ /* We cannot print a '-' and assign -n to n because -n would
+ overflow. Let sprintf deal with this border case. */
+ sprintf (buffer, "%ld", n);
+ p += strlen (buffer);
+ return p;
+ }
+
*p++ = '-';
n = -n;
}
*p = '\0';
#endif /* (SIZEOF_LONG == 4) || (SIZEOF_LONG == 8) */
+
+ return p;
}
#undef ONE_DIGIT
# endif
#endif /* not WINDOWS */
-struct wget_timer {
#ifdef TIMER_GETTIMEOFDAY
- long secs;
- long usecs;
+typedef struct timeval wget_sys_time;
#endif
#ifdef TIMER_TIME
- time_t secs;
+typedef time_t wget_sys_time;
#endif
#ifdef TIMER_WINDOWS
- ULARGE_INTEGER wintime;
+typedef ULARGE_INTEGER wget_sys_time;
#endif
+
+struct wget_timer {
+ /* The starting point in time which, subtracted from the current
+ time, yields elapsed time. */
+ wget_sys_time start;
+
+ /* The most recent elapsed time, calculated by wtimer_elapsed().
+ Measured in milliseconds. */
+ double elapsed_last;
+
+ /* Approximately, the time elapsed between the true start of the
+ measurement and the time represented by START. */
+ double elapsed_pre_start;
};
/* Allocate a timer. It is not legal to do anything with a freshly
xfree (wt);
}
-/* Reset timer WT. This establishes the starting point from which
- wtimer_elapsed() will return the number of elapsed
- milliseconds. It is allowed to reset a previously used timer. */
+/* Store system time to WST. */
-void
-wtimer_reset (struct wget_timer *wt)
+static void
+wtimer_sys_set (wget_sys_time *wst)
{
#ifdef TIMER_GETTIMEOFDAY
- struct timeval t;
- gettimeofday (&t, NULL);
- wt->secs = t.tv_sec;
- wt->usecs = t.tv_usec;
+ gettimeofday (wst, NULL);
#endif
#ifdef TIMER_TIME
- wt->secs = time (NULL);
+ time (wst);
#endif
#ifdef TIMER_WINDOWS
+ /* We use GetSystemTime to get the elapsed time. MSDN warns that
+ system clock adjustments can skew the output of GetSystemTime
+ when used as a timer and gives preference to GetTickCount and
+ high-resolution timers. But GetTickCount can overflow, and hires
+ timers are typically used for profiling, not for regular time
+ measurement. Since we handle clock skew anyway, we just use
+ GetSystemTime. */
FILETIME ft;
SYSTEMTIME st;
GetSystemTime (&st);
+
+ /* As recommended by MSDN, we convert SYSTEMTIME to FILETIME, copy
+ FILETIME to ULARGE_INTEGER, and use regular 64-bit integer
+ arithmetic on that. */
SystemTimeToFileTime (&st, &ft);
- wt->wintime.HighPart = ft.dwHighDateTime;
- wt->wintime.LowPart = ft.dwLowDateTime;
+ wst->HighPart = ft.dwHighDateTime;
+ wst->LowPart = ft.dwLowDateTime;
#endif
}
-/* Return the number of milliseconds elapsed since the timer was last
- reset. It is allowed to call this function more than once to get
- increasingly higher elapsed values. */
+/* Reset timer WT. This establishes the starting point from which
+ wtimer_elapsed() will return the number of elapsed
+ milliseconds. It is allowed to reset a previously used timer. */
-long
-wtimer_elapsed (struct wget_timer *wt)
+void
+wtimer_reset (struct wget_timer *wt)
+{
+ /* Set the start time to the current time. */
+ wtimer_sys_set (&wt->start);
+ wt->elapsed_last = 0;
+ wt->elapsed_pre_start = 0;
+}
+
+static double
+wtimer_sys_diff (wget_sys_time *wst1, wget_sys_time *wst2)
{
#ifdef TIMER_GETTIMEOFDAY
- struct timeval t;
- gettimeofday (&t, NULL);
- return (t.tv_sec - wt->secs) * 1000 + (t.tv_usec - wt->usecs) / 1000;
+ return ((double)(wst1->tv_sec - wst2->tv_sec) * 1000
+ + (double)(wst1->tv_usec - wst2->tv_usec) / 1000);
#endif
#ifdef TIMER_TIME
- time_t now = time (NULL);
- return 1000 * (now - wt->secs);
+ return 1000 * (*wst1 - *wst2);
#endif
#ifdef WINDOWS
- FILETIME ft;
- SYSTEMTIME st;
- ULARGE_INTEGER uli;
- GetSystemTime (&st);
- SystemTimeToFileTime (&st, &ft);
- uli.HighPart = ft.dwHighDateTime;
- uli.LowPart = ft.dwLowDateTime;
- return (long)((uli.QuadPart - wt->wintime.QuadPart) / 10000);
+ return (double)(wst1->QuadPart - wst2->QuadPart) / 10000;
#endif
}
-/* Return the assessed granularity of the timer implementation. This
- is important for certain code that tries to deal with "zero" time
- intervals. */
+/* Return the number of milliseconds elapsed since the timer was last
+ reset. It is allowed to call this function more than once to get
+ increasingly higher elapsed values. These timers handle clock
+ skew. */
-long
+double
+wtimer_elapsed (struct wget_timer *wt)
+{
+ wget_sys_time now;
+ double elapsed;
+
+ wtimer_sys_set (&now);
+ elapsed = wt->elapsed_pre_start + wtimer_sys_diff (&now, &wt->start);
+
+ /* Ideally we'd just return the difference between NOW and
+ wt->start. However, the system timer can be set back, and we
+ could return a value smaller than when we were last called, even
+ a negative value. Both of these would confuse the callers, which
+ expect us to return monotonically nondecreasing values.
+
+ Therefore: if ELAPSED is smaller than its previous known value,
+ we reset wt->start to the current time and effectively start
+ measuring from this point. But since we don't want the elapsed
+ value to start from zero, we set elapsed_pre_start to the last
+ elapsed time and increment all future calculations by that
+ amount. */
+
+ if (elapsed < wt->elapsed_last)
+ {
+ wt->start = now;
+ wt->elapsed_pre_start = wt->elapsed_last;
+ elapsed = wt->elapsed_last;
+ }
+
+ wt->elapsed_last = elapsed;
+ return elapsed;
+}
+
+/* Return the assessed granularity of the timer implementation, in
+ milliseconds. This is used by code that tries to substitute a
+ better value for timers that have returned zero. */
+
+double
wtimer_granularity (void)
{
#ifdef TIMER_GETTIMEOFDAY
- /* Granularity of gettimeofday is hugely architecture-dependent.
- However, it appears that on modern machines it is better than
- 1ms. */
- return 1;
+ /* Granularity of gettimeofday varies wildly between architectures.
+ However, it appears that on modern machines it tends to be better
+ than 1ms. Assume 100 usecs. (Perhaps the configure process
+ could actually measure this?) */
+ return 0.1;
#endif
#ifdef TIMER_TIME
#endif
#ifdef TIMER_WINDOWS
- /* ? */
+ /* According to MSDN, GetSystemTime returns a broken-down time
+ structure the smallest member of which are milliseconds. */
return 1;
#endif
}
#endif /* TIOCGWINSZ */
}
-#if 1
+/* Return a random number between 0 and MAX-1, inclusive.
+
+ If MAX is greater than the value of RAND_MAX+1 on the system, the
+ returned value will be in the range [0, RAND_MAX]. This may be
+ fixed in a future release.
+
+ The random number generator is seeded automatically the first time
+ it is called.
+
+ This uses rand() for portability. It has been suggested that
+ random() offers better randomness, but this is not required for
+ Wget, so I chose to go for simplicity and use rand
+ unconditionally. */
+
+int
+random_number (int max)
+{
+ static int seeded;
+ double bounded;
+ int rnd;
+
+ if (!seeded)
+ {
+ srand (time (NULL));
+ seeded = 1;
+ }
+ rnd = rand ();
+
+ /* On systems that don't define RAND_MAX, assume it to be 2**15 - 1,
+ and enforce that assumption by masking other bits. */
+#ifndef RAND_MAX
+# define RAND_MAX 32767
+ rnd &= RAND_MAX;
+#endif
+
+ /* This is equivalent to rand() % max, but uses the high-order bits
+ for better randomness on architecture where rand() is implemented
+ using a simple congruential generator. */
+
+ bounded = (double)max * rnd / (RAND_MAX + 1.0);
+ return (int)bounded;
+}
+
+#if 0
/* A debugging function for checking whether an MD5 library works. */
#include "gen-md5.h"
return res;
}
#endif
+\f
+/* Implementation of run_with_timeout, a generic timeout handler for
+ systems with Unix-like signal handling. */
+#ifdef USE_SIGNAL_TIMEOUT
+# 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 */
+#endif /* USE_SIGNAL_TIMEOUT */
+
+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
+}
+
projects / wget / blobdiff