aboutsummaryrefslogtreecommitdiff
path: root/stdio-common/psiginfo.c
blob: 6954a42458b06a191f044391e2c58333ecd01de7 (plain)
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
/* Copyright (C) 2009-2017 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <libintl.h>
#include <signal.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <not-cancel.h>


#define MF(l) MF1 (l)
#define MF1(l) str_##l
#define C(s1, s2) C1 (s1, s2)
#define C1(s1, s2) s1##s2

#define NOW SIGILL
#include "psiginfo-define.h"

#define NOW SIGFPE
#include "psiginfo-define.h"

#define NOW SIGSEGV
#include "psiginfo-define.h"

#define NOW SIGBUS
#include "psiginfo-define.h"

#define NOW SIGTRAP
#include "psiginfo-define.h"

#define NOW SIGCLD
#include "psiginfo-define.h"

#define NOW SIGPOLL
#include "psiginfo-define.h"


/* Print out on stderr a line consisting of the test in S, a colon, a space,
   a message describing the meaning of the signal number PINFO and a newline.
   If S is NULL or "", the colon and space are omitted.  */
void
psiginfo (const siginfo_t *pinfo, const char *s)
{
  char buf[512];
  FILE *fp = __fmemopen (buf, sizeof (buf), "w");
  if (fp == NULL)
    {
      const char *colon;

      if (s == NULL || *s == '\0')
	s = colon = "";
      else
	colon = ": ";

      __fxprintf (NULL, "%s%ssignal %d\n", s, colon, pinfo->si_signo);
      return;
    }

  if (s != NULL && *s != '\0')
    fprintf (fp, "%s: ", s);

  const char *desc;
  if (pinfo->si_signo >= 0 && pinfo->si_signo < NSIG
      && ((desc = _sys_siglist[pinfo->si_signo]) != NULL
#ifdef SIGRTMIN
	  || (pinfo->si_signo >= SIGRTMIN && pinfo->si_signo < SIGRTMAX)
#endif
	 ))
    {
#ifdef SIGRTMIN
      if (desc == NULL)
	{
	  if (pinfo->si_signo - SIGRTMIN < SIGRTMAX - pinfo->si_signo)
	    {
	      if (pinfo->si_signo == SIGRTMIN)
		fprintf (fp, "SIGRTMIN (");
	      else
		fprintf (fp, "SIGRTMIN+%d (", pinfo->si_signo - SIGRTMIN);
	    }
	  else
	    {
	      if (pinfo->si_signo == SIGRTMAX)
		fprintf (fp, "SIGRTMAX (");
	      else
		fprintf (fp, "SIGRTMAX-%d (", SIGRTMAX - pinfo->si_signo);
	    }
	}
      else
#endif
	fprintf (fp, "%s (", _(desc));

      const char *base = NULL;
      const uint8_t *offarr = NULL;
      size_t offarr_len = 0;
      switch (pinfo->si_signo)
	{
#define H(sig) \
	case sig:							      \
	  base = C(codestrs_, sig).str;					      \
	  offarr = C (codes_, sig);					      \
	  offarr_len = sizeof (C (codes_, sig)) / sizeof (C (codes_, sig)[0]);\
	  break

	  H (SIGILL);
	  H (SIGFPE);
	  H (SIGSEGV);
	  H (SIGBUS);
	  H (SIGTRAP);
	  H (SIGCHLD);
	  H (SIGPOLL);
	}

      const char *str = NULL;
      if (offarr != NULL
	  && pinfo->si_code >= 1 && pinfo->si_code <= offarr_len)
	str = base + offarr[pinfo->si_code - 1];
      else
	switch (pinfo->si_code)
	  {
	  case SI_USER:
	    str = N_("Signal sent by kill()");
	    break;
	  case SI_QUEUE:
	    str = N_("Signal sent by sigqueue()");
	    break;
	  case SI_TIMER:
	    str = N_("Signal generated by the expiration of a timer");
	    break;
	  case SI_ASYNCIO:
	    str = N_("\
Signal generated by the completion of an asynchronous I/O request");
	    break;
	  case SI_MESGQ:
	    str = N_("\
Signal generated by the arrival of a message on an empty message queue");
	    break;
#ifdef SI_TKILL
	  case SI_TKILL:
	    str = N_("Signal sent by tkill()");
	    break;
#endif
#ifdef SI_ASYNCNL
	  case SI_ASYNCNL:
	    str = N_("\
Signal generated by the completion of an asynchronous name lookup request");
	    break;
#endif
#ifdef SI_SIGIO
	  case SI_SIGIO:
	    str = N_("\
Signal generated by the completion of an I/O request");
	    break;
#endif
#ifdef SI_KERNEL
	  case SI_KERNEL:
	    str = N_("Signal sent by the kernel");
	    break;
#endif
	  }

      if (str != NULL)
	fprintf (fp, "%s ", _(str));
      else
	fprintf (fp, "%d ", pinfo->si_code);

      if (pinfo->si_signo == SIGILL || pinfo->si_signo == SIGFPE
	  || pinfo->si_signo == SIGSEGV || pinfo->si_signo == SIGBUS)
	fprintf (fp, "[%p])\n", pinfo->si_addr);
      else if (pinfo->si_signo == SIGCHLD)
	fprintf (fp, "%ld %d %ld)\n",
		 (long int) pinfo->si_pid, pinfo->si_status,
		 (long int) pinfo->si_uid);
      else if (pinfo->si_signo == SIGPOLL)
	fprintf (fp, "%ld)\n", (long int) pinfo->si_band);
      else
	fprintf (fp, "%ld %ld)\n",
		 (long int) pinfo->si_pid, (long int) pinfo->si_uid);
    }
  else
    fprintf (fp, _("Unknown signal %d\n"),  pinfo->si_signo);

  fclose (fp);

  write_not_cancel (STDERR_FILENO, buf, strlen (buf));
}