1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/*
* Copyright (c) 2015-16 David Lamparter, for NetDEF, Inc.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <pthread.h>
#include <signal.h>
#include "ferr.h"
#include "vty.h"
#include "jhash.h"
#include "memory.h"
DEFINE_MTYPE_STATIC(LIB, ERRINFO, "error information")
static pthread_key_t errkey;
static void ferr_free(void *arg)
{
XFREE(MTYPE_ERRINFO, arg);
}
static void err_key_init(void) __attribute__((_CONSTRUCTOR(500)));
static void err_key_init(void)
{
pthread_key_create(&errkey, ferr_free);
}
static void err_key_fini(void) __attribute__((_DESTRUCTOR(500)));
static void err_key_fini(void)
{
pthread_key_delete(errkey);
}
const struct ferr *ferr_get_last(ferr_r errval)
{
struct ferr *last_error = pthread_getspecific(errkey);
if (!last_error || last_error->kind == 0)
return NULL;
return last_error;
}
ferr_r ferr_clear(void)
{
struct ferr *last_error = pthread_getspecific(errkey);
if (last_error)
last_error->kind = 0;
return ferr_ok();
}
static ferr_r ferr_set_va(const char *file, int line, const char *func,
enum ferr_kind kind, const char *pathname, int errno_val,
const char *text, va_list va)
{
struct ferr *error = pthread_getspecific(errkey);
if (!error) {
error = XCALLOC(MTYPE_ERRINFO, sizeof(*error));
if (!error) {
/* we're screwed */
zlog_err("out of memory while allocating error info");
raise(SIGSEGV);
}
pthread_setspecific(errkey, error);
}
error->file = file;
error->line = line;
error->func = func;
error->kind = kind;
error->unique_id = jhash(text, strlen(text),
jhash(file, strlen(file), 0xd4ed0298));
error->errno_val = errno_val;
if (pathname)
snprintf(error->pathname, sizeof(error->pathname),
"%s", pathname);
else
error->pathname[0] = '\0';
vsnprintf(error->message, sizeof(error->message), text, va);
return -1;
}
ferr_r ferr_set_internal(const char *file, int line, const char *func,
enum ferr_kind kind, const char *text, ...)
{
ferr_r rv;
va_list va;
va_start(va, text);
rv = ferr_set_va(file, line, func, kind, NULL, 0, text, va);
va_end(va);
return rv;
}
ferr_r ferr_set_internal_ext(const char *file, int line, const char *func,
enum ferr_kind kind, const char *pathname, int errno_val,
const char *text, ...)
{
ferr_r rv;
va_list va;
va_start(va, text);
rv = ferr_set_va(file, line, func, kind, pathname, errno_val, text, va);
va_end(va);
return rv;
}
#define REPLACE "$ERR"
void vty_print_error(struct vty *vty, ferr_r err, const char *msg, ...)
{
char tmpmsg[512], *replacepos;
const struct ferr *last_error = ferr_get_last(err);
va_list va;
va_start(va, msg);
vsnprintf(tmpmsg, sizeof(tmpmsg), msg, va);
va_end(va);
replacepos = strstr(tmpmsg, REPLACE);
if (!replacepos)
vty_out(vty, "%s\n", tmpmsg);
else {
replacepos[0] = '\0';
replacepos += sizeof(REPLACE) - 1;
vty_out(vty, "%s%s%s\n",
tmpmsg,
last_error ? last_error->message : "(no error?)",
replacepos);
}
}
|
