1 /* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
5 * Copyright (C) 2011 Data Differential, http://datadifferential.com/
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are
12 * * Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
15 * * Redistributions in binary form must reproduce the above
16 * copyright notice, this list of conditions and the following disclaimer
17 * in the documentation and/or other materials provided with the
20 * * The names of its contributors may not be used to endorse or
21 * promote products derived from this software without specific prior
24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
25 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
26 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
27 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
28 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
29 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
30 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 #include <libmemcached/common.h>
41 #define MAX_ERROR_LENGTH 2048
42 struct memcached_error_t
46 struct memcached_error_t
*next
;
47 memcached_return_t rc
;
50 char message
[MAX_ERROR_LENGTH
];
53 static void _set(memcached_server_st
& server
, memcached_st
& memc
)
55 if (server
.error_messages
&& server
.error_messages
->query_id
!= server
.root
->query_id
)
57 memcached_error_free(server
);
60 if (memc
.error_messages
== NULL
)
65 memcached_error_t
*error
= libmemcached_xmalloc(&memc
, memcached_error_t
);
66 if (error
== NULL
) // Bad business if this happens
71 memcpy(error
, memc
.error_messages
, sizeof(memcached_error_t
));
72 error
->next
= server
.error_messages
;
73 server
.error_messages
= error
;
77 static int error_log_fd
= -1;
80 static void _set(memcached_st
& memc
, memcached_string_t
*str
, memcached_return_t
&rc
, const char *at
, int local_errno
= 0)
82 if (memc
.error_messages
&& memc
.error_messages
->query_id
!= memc
.query_id
)
84 memcached_error_free(memc
);
87 // For memory allocation we use our error since it is a bit more specific
88 if (local_errno
== ENOMEM
and rc
== MEMCACHED_ERRNO
)
90 rc
= MEMCACHED_MEMORY_ALLOCATION_FAILURE
;
93 if (rc
== MEMCACHED_MEMORY_ALLOCATION_FAILURE
)
98 if (rc
== MEMCACHED_ERRNO
and not local_errno
)
104 if (rc
== MEMCACHED_ERRNO
and local_errno
== ENOTCONN
)
106 rc
= MEMCACHED_CONNECTION_FAILURE
;
109 if (local_errno
== EINVAL
)
111 rc
= MEMCACHED_INVALID_ARGUMENTS
;
114 if (local_errno
== ECONNREFUSED
)
116 rc
= MEMCACHED_CONNECTION_FAILURE
;
119 memcached_error_t
*error
= libmemcached_xmalloc(&memc
, memcached_error_t
);
120 if (error
== NULL
) // Bad business if this happens
126 error
->query_id
= memc
.query_id
;
128 error
->local_errno
= local_errno
;
130 const char *errmsg_ptr
;
131 char errmsg
[MAX_ERROR_LENGTH
];
137 #ifdef STRERROR_R_CHAR_P
138 errmsg_ptr
= strerror_r(local_errno
, errmsg
, sizeof(errmsg
));
140 strerror_r(local_errno
, errmsg
, sizeof(errmsg
));
146 if (str
and str
->size
and local_errno
)
148 error
->size
= (int)snprintf(error
->message
, MAX_ERROR_LENGTH
, "(%lu) %s(%s), %.*s -> %s",
150 memcached_strerror(&memc
, rc
),
152 memcached_string_printf(*str
), at
);
154 else if (local_errno
)
156 error
->size
= (int)snprintf(error
->message
, MAX_ERROR_LENGTH
, "(%lu) %s(%s) -> %s",
158 memcached_strerror(&memc
, rc
),
162 else if (rc
== MEMCACHED_PARSE_ERROR
and str
and str
->size
)
164 error
->size
= (int)snprintf(error
->message
, MAX_ERROR_LENGTH
, "(%lu) %.*s -> %s",
166 int(str
->size
), str
->c_str
, at
);
168 else if (str
and str
->size
)
170 error
->size
= (int)snprintf(error
->message
, MAX_ERROR_LENGTH
, "(%lu) %s, %.*s -> %s",
172 memcached_strerror(&memc
, rc
),
173 int(str
->size
), str
->c_str
, at
);
177 error
->size
= (int)snprintf(error
->message
, MAX_ERROR_LENGTH
, "(%lu) %s -> %s",
179 memcached_strerror(&memc
, rc
), at
);
182 error
->next
= memc
.error_messages
;
183 memc
.error_messages
= error
;
186 if (error_log_fd
== -1)
188 // unlink("/tmp/libmemcachd.log");
189 if ((error_log_fd
= open("/tmp/libmemcachd.log", O_CREAT
| O_WRONLY
| O_APPEND
, 0644)) < 0)
195 ::write(error_log_fd
, error
->message
, error
->size
);
196 ::write(error_log_fd
, "\n", 1);
200 memcached_return_t
memcached_set_error(memcached_st
& memc
, memcached_return_t rc
, const char *at
, const char *str
, size_t length
)
202 assert_msg(rc
!= MEMCACHED_ERRNO
, "Programmer error, MEMCACHED_ERRNO was set to be returned to client");
203 memcached_string_t tmp
= { str
, length
};
204 return memcached_set_error(memc
, rc
, at
, tmp
);
207 memcached_return_t
memcached_set_error(memcached_server_st
& self
, memcached_return_t rc
, const char *at
, const char *str
, size_t length
)
209 assert_msg(rc
!= MEMCACHED_ERRNO
, "Programmer error, MEMCACHED_ERRNO was set to be returned to client");
210 assert_msg(rc
!= MEMCACHED_SOME_ERRORS
, "Programmer error, MEMCACHED_SOME_ERRORS was about to be set on a memcached_server_st");
211 memcached_string_t tmp
= { str
, length
};
212 return memcached_set_error(self
, rc
, at
, tmp
);
215 memcached_return_t
memcached_set_error(memcached_st
& memc
, memcached_return_t rc
, const char *at
, memcached_string_t
& str
)
217 assert_msg(rc
!= MEMCACHED_ERRNO
, "Programmer error, MEMCACHED_ERRNO was set to be returned to client");
218 if (memcached_fatal(rc
) == false)
223 _set(memc
, &str
, rc
, at
);
228 memcached_return_t
memcached_set_parser_error(memcached_st
& memc
,
230 const char *format
, ...)
235 va_start(args
, format
);
236 int length
= vsnprintf(buffer
, sizeof(buffer
), format
, args
);
239 return memcached_set_error(memc
, MEMCACHED_PARSE_ERROR
, at
, buffer
, length
);
242 memcached_return_t
memcached_set_error(memcached_server_st
& self
, memcached_return_t rc
, const char *at
, memcached_string_t
& str
)
244 assert_msg(rc
!= MEMCACHED_ERRNO
, "Programmer error, MEMCACHED_ERRNO was set to be returned to client");
245 assert_msg(rc
!= MEMCACHED_SOME_ERRORS
, "Programmer error, MEMCACHED_SOME_ERRORS was about to be set on a memcached_server_st");
246 if (memcached_fatal(rc
) == false)
251 char hostname_port_message
[MAX_ERROR_LENGTH
];
255 size
= snprintf(hostname_port_message
, sizeof(hostname_port_message
), "%.*s, host: %s:%d",
256 memcached_string_printf(str
),
257 self
.hostname
, int(self
.port
));
261 size
= snprintf(hostname_port_message
, sizeof(hostname_port_message
), "host: %s:%d",
262 self
.hostname
, int(self
.port
));
265 memcached_string_t error_host
= { hostname_port_message
, size
};
268 if (self
.root
== NULL
)
273 _set(*self
.root
, &error_host
, rc
, at
);
274 _set(self
, (*self
.root
));
275 assert(self
.root
->error_messages
);
276 assert(self
.error_messages
);
281 memcached_return_t
memcached_set_error(memcached_server_st
& self
, memcached_return_t rc
, const char *at
)
283 assert_msg(rc
!= MEMCACHED_SOME_ERRORS
, "Programmer error, MEMCACHED_SOME_ERRORS was about to be set on a memcached_server_st");
284 if (memcached_fatal(rc
) == false)
289 char hostname_port
[NI_MAXHOST
+NI_MAXSERV
+ sizeof("host : ")];
290 int size
= snprintf(hostname_port
, sizeof(hostname_port
), "host: %s:%d", self
.hostname
, int(self
.port
));
292 memcached_string_t error_host
= { hostname_port
, size
};
294 if (self
.root
== NULL
)
299 _set(*self
.root
, &error_host
, rc
, at
);
300 _set(self
, *self
.root
);
305 memcached_return_t
memcached_set_error(memcached_st
& self
, memcached_return_t rc
, const char *at
)
307 assert_msg(rc
!= MEMCACHED_ERRNO
, "Programmer error, MEMCACHED_ERRNO was set to be returned to client");
308 if (memcached_fatal(rc
) == false)
313 _set(self
, NULL
, rc
, at
);
318 memcached_return_t
memcached_set_errno(memcached_st
& self
, int local_errno
, const char *at
, const char *str
, size_t length
)
320 memcached_string_t tmp
= { str
, length
};
321 return memcached_set_errno(self
, local_errno
, at
, tmp
);
324 memcached_return_t
memcached_set_errno(memcached_server_st
& self
, int local_errno
, const char *at
, const char *str
, size_t length
)
326 memcached_string_t tmp
= { str
, length
};
327 return memcached_set_errno(self
, local_errno
, at
, tmp
);
330 memcached_return_t
memcached_set_errno(memcached_st
& self
, int local_errno
, const char *at
)
332 if (local_errno
== 0)
334 return MEMCACHED_SUCCESS
;
337 memcached_return_t rc
= MEMCACHED_ERRNO
;
338 _set(self
, NULL
, rc
, at
, local_errno
);
343 memcached_return_t
memcached_set_errno(memcached_st
& memc
, int local_errno
, const char *at
, memcached_string_t
& str
)
345 if (local_errno
== 0)
347 return MEMCACHED_SUCCESS
;
350 memcached_return_t rc
= MEMCACHED_ERRNO
;
351 _set(memc
, &str
, rc
, at
, local_errno
);
356 memcached_return_t
memcached_set_errno(memcached_server_st
& self
, int local_errno
, const char *at
, memcached_string_t
& str
)
358 if (local_errno
== 0)
360 return MEMCACHED_SUCCESS
;
363 char hostname_port_message
[MAX_ERROR_LENGTH
];
367 size
= snprintf(hostname_port_message
, sizeof(hostname_port_message
), "%.*s, host: %s:%d",
368 memcached_string_printf(str
),
369 self
.hostname
, int(self
.port
));
373 size
= snprintf(hostname_port_message
, sizeof(hostname_port_message
), "host: %s:%d",
374 self
.hostname
, int(self
.port
));
377 memcached_string_t error_host
= { hostname_port_message
, size
};
379 memcached_return_t rc
= MEMCACHED_ERRNO
;
380 if (self
.root
== NULL
)
385 _set(*self
.root
, &error_host
, rc
, at
, local_errno
);
386 _set(self
, (*self
.root
));
391 memcached_return_t
memcached_set_errno(memcached_server_st
& self
, int local_errno
, const char *at
)
393 if (local_errno
== 0)
395 return MEMCACHED_SUCCESS
;
398 char hostname_port_message
[MAX_ERROR_LENGTH
];
399 int size
= snprintf(hostname_port_message
, sizeof(hostname_port_message
), "host: %s:%d",
400 self
.hostname
, int(self
.port
));
402 memcached_string_t error_host
= { hostname_port_message
, size
};
404 memcached_return_t rc
= MEMCACHED_ERRNO
;
405 if (self
.root
== NULL
)
410 _set(*self
.root
, &error_host
, rc
, at
, local_errno
);
411 _set(self
, (*self
.root
));
416 static void _error_print(const memcached_error_t
*error
)
423 if (error
->size
== 0)
425 fprintf(stderr
, "\t%s\n", memcached_strerror(NULL
, error
->rc
) );
429 fprintf(stderr
, "\t%s %s\n", memcached_strerror(NULL
, error
->rc
), error
->message
);
432 _error_print(error
->next
);
435 void memcached_error_print(const memcached_st
*self
)
442 _error_print(self
->error_messages
);
444 for (uint32_t x
= 0; x
< memcached_server_count(self
); x
++)
446 memcached_server_instance_st instance
= memcached_server_instance_by_position(self
, x
);
448 _error_print(instance
->error_messages
);
452 static void _error_free(memcached_error_t
*error
)
459 _error_free(error
->next
);
461 if (error
&& error
->root
)
463 libmemcached_free(error
->root
, error
);
471 void memcached_error_free(memcached_st
& self
)
473 _error_free(self
.error_messages
);
474 self
.error_messages
= NULL
;
477 void memcached_error_free(memcached_server_st
& self
)
479 _error_free(self
.error_messages
);
480 self
.error_messages
= NULL
;
483 const char *memcached_last_error_message(memcached_st
*memc
)
487 return memcached_strerror(memc
, MEMCACHED_INVALID_ARGUMENTS
);
490 if (memc
->error_messages
== NULL
)
492 return memcached_strerror(memc
, MEMCACHED_SUCCESS
);
495 if (memc
->error_messages
->size
== 0)
497 return memcached_strerror(memc
, memc
->error_messages
->rc
);
500 return memc
->error_messages
->message
;
503 bool memcached_has_current_error(memcached_st
&memc
)
505 if (memc
.error_messages
506 and memc
.error_messages
->query_id
== memc
.query_id
507 and memcached_failed(memc
.error_messages
->rc
))
515 bool memcached_has_current_error(memcached_server_st
& server
)
517 return memcached_has_current_error(*(server
.root
));
520 memcached_return_t
memcached_last_error(memcached_st
*memc
)
524 return MEMCACHED_INVALID_ARGUMENTS
;
527 if (not memc
->error_messages
)
529 return MEMCACHED_SUCCESS
;
532 return memc
->error_messages
->rc
;
535 int memcached_last_error_errno(memcached_st
*memc
)
542 if (not memc
->error_messages
)
547 return memc
->error_messages
->local_errno
;
550 const char *memcached_server_error(memcached_server_instance_st server
)
557 if (not server
->error_messages
)
559 return memcached_strerror(server
->root
, MEMCACHED_SUCCESS
);
562 if (not server
->error_messages
->size
)
564 return memcached_strerror(server
->root
, server
->error_messages
->rc
);
567 return server
->error_messages
->message
;
571 memcached_error_t
*memcached_error_copy(const memcached_server_st
& server
)
573 if (server
.error_messages
== NULL
)
578 memcached_error_t
*error
= libmemcached_xmalloc(server
.root
, memcached_error_t
);
579 memcpy(error
, server
.error_messages
, sizeof(memcached_error_t
));
585 memcached_return_t
memcached_server_error_return(memcached_server_instance_st ptr
)
589 return MEMCACHED_INVALID_ARGUMENTS
;
592 if (ptr
and ptr
->error_messages
)
594 return ptr
->error_messages
->rc
;
597 return MEMCACHED_SUCCESS
;