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3155489a DL |
1 | /* |
2 | * Copyright (c) 2015-16 David Lamparter, for NetDEF, Inc. | |
3 | * | |
4 | * Permission to use, copy, modify, and distribute this software for any | |
5 | * purpose with or without fee is hereby granted, provided that the above | |
6 | * copyright notice and this permission notice appear in all copies. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
9 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
10 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
11 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
12 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
14 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
15 | */ | |
16 | ||
17 | #include <stdlib.h> | |
18 | #include <stdarg.h> | |
19 | #include <string.h> | |
20 | #include <pthread.h> | |
21 | #include <signal.h> | |
22 | ||
23 | #include "ferr.h" | |
24 | #include "vty.h" | |
25 | #include "jhash.h" | |
26 | #include "memory.h" | |
27 | ||
28 | DEFINE_MTYPE_STATIC(LIB, ERRINFO, "error information") | |
29 | ||
30 | static pthread_key_t errkey; | |
31 | ||
32 | static void ferr_free(void *arg) | |
33 | { | |
34 | XFREE(MTYPE_ERRINFO, arg); | |
35 | } | |
36 | ||
37 | static void err_key_init(void) __attribute__((_CONSTRUCTOR(500))); | |
38 | static void err_key_init(void) | |
39 | { | |
40 | pthread_key_create(&errkey, ferr_free); | |
41 | } | |
42 | ||
43 | static void err_key_fini(void) __attribute__((_DESTRUCTOR(500))); | |
44 | static void err_key_fini(void) | |
45 | { | |
46 | pthread_key_delete(errkey); | |
47 | } | |
48 | ||
49 | const struct ferr *ferr_get_last(ferr_r errval) | |
50 | { | |
51 | struct ferr *last_error = pthread_getspecific(errkey); | |
52 | if (!last_error || last_error->kind == 0) | |
53 | return NULL; | |
54 | return last_error; | |
55 | } | |
56 | ||
57 | ferr_r ferr_clear(void) | |
58 | { | |
59 | struct ferr *last_error = pthread_getspecific(errkey); | |
60 | if (last_error) | |
61 | last_error->kind = 0; | |
62 | return ferr_ok(); | |
63 | } | |
64 | ||
65 | static ferr_r ferr_set_va(const char *file, int line, const char *func, | |
996c9314 LB |
66 | enum ferr_kind kind, const char *pathname, |
67 | int errno_val, const char *text, va_list va) | |
3155489a DL |
68 | { |
69 | struct ferr *error = pthread_getspecific(errkey); | |
70 | ||
71 | if (!error) { | |
72 | error = XCALLOC(MTYPE_ERRINFO, sizeof(*error)); | |
73 | if (!error) { | |
74 | /* we're screwed */ | |
75 | zlog_err("out of memory while allocating error info"); | |
76 | raise(SIGSEGV); | |
996c9314 LB |
77 | abort(); /* raise() can return, but raise(SIGSEGV) shall |
78 | not */ | |
3155489a DL |
79 | } |
80 | ||
81 | pthread_setspecific(errkey, error); | |
82 | } | |
83 | ||
84 | error->file = file; | |
85 | error->line = line; | |
86 | error->func = func; | |
87 | error->kind = kind; | |
88 | ||
89 | error->unique_id = jhash(text, strlen(text), | |
996c9314 | 90 | jhash(file, strlen(file), 0xd4ed0298)); |
3155489a DL |
91 | |
92 | error->errno_val = errno_val; | |
93 | if (pathname) | |
996c9314 LB |
94 | snprintf(error->pathname, sizeof(error->pathname), "%s", |
95 | pathname); | |
3155489a DL |
96 | else |
97 | error->pathname[0] = '\0'; | |
98 | ||
99 | vsnprintf(error->message, sizeof(error->message), text, va); | |
100 | return -1; | |
101 | } | |
102 | ||
103 | ferr_r ferr_set_internal(const char *file, int line, const char *func, | |
996c9314 | 104 | enum ferr_kind kind, const char *text, ...) |
3155489a DL |
105 | { |
106 | ferr_r rv; | |
107 | va_list va; | |
108 | va_start(va, text); | |
109 | rv = ferr_set_va(file, line, func, kind, NULL, 0, text, va); | |
110 | va_end(va); | |
111 | return rv; | |
112 | } | |
113 | ||
114 | ferr_r ferr_set_internal_ext(const char *file, int line, const char *func, | |
996c9314 LB |
115 | enum ferr_kind kind, const char *pathname, |
116 | int errno_val, const char *text, ...) | |
3155489a DL |
117 | { |
118 | ferr_r rv; | |
119 | va_list va; | |
120 | va_start(va, text); | |
121 | rv = ferr_set_va(file, line, func, kind, pathname, errno_val, text, va); | |
122 | va_end(va); | |
123 | return rv; | |
124 | } | |
125 | ||
126 | #define REPLACE "$ERR" | |
127 | void vty_print_error(struct vty *vty, ferr_r err, const char *msg, ...) | |
128 | { | |
129 | char tmpmsg[512], *replacepos; | |
130 | const struct ferr *last_error = ferr_get_last(err); | |
131 | ||
132 | va_list va; | |
133 | va_start(va, msg); | |
134 | vsnprintf(tmpmsg, sizeof(tmpmsg), msg, va); | |
135 | va_end(va); | |
136 | ||
137 | replacepos = strstr(tmpmsg, REPLACE); | |
138 | if (!replacepos) | |
139 | vty_out(vty, "%s\n", tmpmsg); | |
140 | else { | |
141 | replacepos[0] = '\0'; | |
142 | replacepos += sizeof(REPLACE) - 1; | |
996c9314 | 143 | vty_out(vty, "%s%s%s\n", tmpmsg, |
3155489a DL |
144 | last_error ? last_error->message : "(no error?)", |
145 | replacepos); | |
146 | } | |
147 | } |