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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/******************************************************/
/* tpax: a topological pax implementation */
/* Copyright (C) 2020 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.TPAX. */
/******************************************************/
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <tpax/tpax.h>
#include "tpax_driver_impl.h"
#include "tpax_dprintf_impl.h"
static const char aclr_reset[] = "\x1b[0m";
static const char aclr_bold[] = "\x1b[1m";
static const char aclr_red[] = "\x1b[31m";
static const char aclr_green[] = "\x1b[32m";
static const char aclr_blue[] = "\x1b[34m";
static const char aclr_magenta[] = "\x1b[35m";
static const char * const tpax_error_strings[TPAX_ERR_CAP] = {
[TPAX_ERR_FLOW_ERROR] = "flow error: unexpected condition or other",
[TPAX_ERR_FLEE_ERROR] = "flees and bugs and cats and mice",
[TPAX_ERR_NULL_CONTEXT] = "null driver or unit context",
[TPAX_ERR_BAD_DATA] = "corrupt or wrong daata",
[TPAX_ERR_FILE_CHANGED] = "file has changed",
[TPAX_ERR_REGION_SIZE] = "file too large for a memory snapshot",
};
static const char * tpax_output_error_header(const struct tpax_error_info * erri)
{
if (erri->eflags & TPAX_ERROR_CHILD)
return "exec error upon";
else if (erri->eflags & TPAX_ERROR_TOP_LEVEL)
return "error logged in";
else if (erri->eflags & TPAX_ERROR_NESTED)
return "< returned to >";
else
return "distorted state";
}
static const char * tpax_output_unit_header(const struct tpax_error_info * erri)
{
if (!(erri->eflags & TPAX_ERROR_CUSTOM))
return "while opening";
else
return "while parsing";
}
static const char * tpax_output_strerror(
const struct tpax_error_info * erri,
char (*errbuf)[256])
{
if (erri->eflags & TPAX_ERROR_CUSTOM)
return ((erri->elibcode < 0) || (erri->elibcode >= TPAX_ERR_CAP))
? "internal error: please report to the maintainer"
: tpax_error_strings[erri->elibcode];
else if (erri->eflags & TPAX_ERROR_NESTED)
return "";
else if (erri->eflags & TPAX_ERROR_CHILD)
return "(see child process error messages)";
else if (erri->esyscode == ENOBUFS)
return "input error: string length exceeds buffer size";
else
return strerror_r(erri->esyscode,*errbuf,sizeof(*errbuf))
? "internal error: strerror_r(3) call failed"
: *errbuf;
}
static int tpax_output_error_record_plain(
const struct tpax_driver_ctx * dctx,
const struct tpax_error_info * erri)
{
const char * epath;
char errbuf[256];
int fderr = tpax_driver_fderr(dctx);
const char * errdesc = tpax_output_strerror(erri,&errbuf);
epath = erri->euctx
? *erri->euctx->path
: erri->eunit;
if (epath && !(erri->eflags & TPAX_ERROR_NESTED))
if (tpax_dprintf(
fderr,
"%s: [%s] '%s':\n",
dctx->program,
tpax_output_unit_header(erri),
epath) < 0)
return -1;
if (tpax_dprintf(
fderr,
"%s: %s %s(), line %d%s%s.\n",
dctx->program,
tpax_output_error_header(erri),
erri->efunction,
erri->eline,
strlen(errdesc) ? ": " : "",
errdesc) < 0)
return -1;
return 0;
}
static int tpax_output_error_record_annotated(
const struct tpax_driver_ctx * dctx,
const struct tpax_error_info * erri)
{
const char * epath;
char errbuf[256];
int fderr = tpax_driver_fderr(dctx);
const char * errdesc = tpax_output_strerror(erri,&errbuf);
epath = erri->euctx
? *erri->euctx->path
: erri->eunit;
if (epath && !(erri->eflags & TPAX_ERROR_NESTED))
if (tpax_dprintf(
fderr,
"%s%s%s:%s %s[%s]%s %s%s'%s'%s:\n",
aclr_bold,aclr_magenta,
dctx->program,
aclr_reset,
aclr_bold,
tpax_output_unit_header(erri),
aclr_reset,
aclr_bold,aclr_red,
epath,
aclr_reset) < 0)
return -1;
if (tpax_dprintf(
fderr,
"%s%s%s:%s %s%s%s %s%s%s()%s, %s%sline %d%s%s%s%s%s.\n",
aclr_bold,aclr_magenta,
dctx->program,
aclr_reset,
aclr_bold,
tpax_output_error_header(erri),
aclr_reset,
aclr_bold,aclr_blue,
erri->efunction,
aclr_reset,
aclr_bold,aclr_green,
erri->eline,
aclr_reset,
strlen(errdesc) ? ": " : "",
aclr_bold,
errdesc,
aclr_reset) < 0)
return -1;
return 0;
}
int tpax_output_error_record(
const struct tpax_driver_ctx * dctx,
const struct tpax_error_info * erri)
{
if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_NEVER)
return tpax_output_error_record_plain(dctx,erri);
else if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_ALWAYS)
return tpax_output_error_record_annotated(dctx,erri);
else if (isatty(tpax_driver_fderr(dctx)))
return tpax_output_error_record_annotated(dctx,erri);
else
return tpax_output_error_record_plain(dctx,erri);
}
static int tpax_output_error_vector_plain(const struct tpax_driver_ctx * dctx)
{
struct tpax_error_info ** perr;
for (perr=dctx->errv; *perr; perr++)
if (tpax_output_error_record_plain(dctx,*perr))
return -1;
return 0;
}
static int tpax_output_error_vector_annotated(const struct tpax_driver_ctx * dctx)
{
struct tpax_error_info ** perr;
for (perr=dctx->errv; *perr; perr++)
if (tpax_output_error_record_annotated(dctx,*perr))
return -1;
return 0;
}
int tpax_output_error_vector(const struct tpax_driver_ctx * dctx)
{
if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_NEVER)
return tpax_output_error_vector_plain(dctx);
else if (dctx->cctx->drvflags & TPAX_DRIVER_ANNOTATE_ALWAYS)
return tpax_output_error_vector_annotated(dctx);
else if (isatty(tpax_driver_fderr(dctx)))
return tpax_output_error_vector_annotated(dctx);
else
return tpax_output_error_vector_plain(dctx);
}
|
