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1 | .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk) |
2 | .\" | |
93015253 | 3 | .\" %%%LICENSE_START(VERBATIM) |
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4 | .\" Permission is granted to make and distribute verbatim copies of this |
5 | .\" manual provided the copyright notice and this permission notice are | |
6 | .\" preserved on all copies. | |
7 | .\" | |
8 | .\" Permission is granted to copy and distribute modified versions of this | |
9 | .\" manual under the conditions for verbatim copying, provided that the | |
10 | .\" entire resulting derived work is distributed under the terms of a | |
11 | .\" permission notice identical to this one. | |
c13182ef | 12 | .\" |
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13 | .\" Since the Linux kernel and libraries are constantly changing, this |
14 | .\" manual page may be incorrect or out-of-date. The author(s) assume no | |
15 | .\" responsibility for errors or omissions, or for damages resulting from | |
16 | .\" the use of the information contained herein. The author(s) may not | |
17 | .\" have taken the same level of care in the production of this manual, | |
18 | .\" which is licensed free of charge, as they might when working | |
19 | .\" professionally. | |
c13182ef | 20 | .\" |
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21 | .\" Formatted or processed versions of this manual, if unaccompanied by |
22 | .\" the source, must acknowledge the copyright and authors of this work. | |
4b72fb64 | 23 | .\" %%%LICENSE_END |
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24 | .\" |
25 | .\" References consulted: | |
26 | .\" Linux libc source code | |
27 | .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991) | |
28 | .\" 386BSD man pages | |
29 | .\" Modified Sat Jul 24 18:45:17 1993 by Rik Faith (faith@cs.unc.edu) | |
4b8c67d9 | 30 | .TH PSIGNAL 3 2017-09-15 "GNU" "Linux Programmer's Manual" |
fea681da | 31 | .SH NAME |
58ac0956 | 32 | psignal, psiginfo \- print signal message |
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33 | .SH SYNOPSIS |
34 | .nf | |
35 | .B #include <signal.h> | |
68e4db0a | 36 | .PP |
fea681da | 37 | .BI "void psignal(int " sig ", const char *" s ); |
58ac0956 | 38 | .BI "void psiginfo(const siginfo_t *" pinfo ", const char *" s ); |
68e4db0a | 39 | .PP |
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40 | .BI "extern const char *const " sys_siglist []; |
41 | .fi | |
68e4db0a | 42 | .PP |
cc4615cc MK |
43 | .in -4n |
44 | Feature Test Macro Requirements for glibc (see | |
45 | .BR feature_test_macros (7)): | |
46 | .in | |
68e4db0a | 47 | .PP |
cc4615cc | 48 | .BR psignal (): |
51c612fb MK |
49 | Since glibc 2.19: |
50 | _DEFAULT_SOURCE | |
51 | Glibc 2.19 and earlier: | |
52 | _BSD_SOURCE || _SVID_SOURCE | |
cc4615cc | 53 | .br |
58ac0956 | 54 | .BR psiginfo (): |
b0da7b8b | 55 | _POSIX_C_SOURCE\ >=\ 200809L |
58ac0956 | 56 | .br |
cc4615cc | 57 | .IR sys_siglist : |
51c612fb MK |
58 | Since glibc 2.19: |
59 | _DEFAULT_SOURCE | |
60 | Glibc 2.19 and earlier: | |
61 | _BSD_SOURCE | |
fea681da | 62 | .SH DESCRIPTION |
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63 | The |
64 | .BR psignal () | |
65 | function displays a message on \fIstderr\fP | |
58ac0956 GJ |
66 | consisting of the string \fIs\fP, a colon, a space, a string |
67 | describing the signal number \fIsig\fP, and a trailing newline. | |
68 | If the string \fIs\fP is NULL or empty, the colon and space are omitted. | |
1c44bd5b | 69 | If \fIsig\fP is invalid, |
fea681da | 70 | the message displayed will indicate an unknown signal. |
847e0d88 | 71 | .PP |
58ac0956 GJ |
72 | The |
73 | .BR psiginfo () | |
74 | function is like | |
75 | .BR psignal (), | |
76 | except that it displays information about the signal described by | |
77 | .IR pinfo , | |
78 | which should point to a valid | |
79 | .I siginfo_t | |
80 | structure. | |
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81 | As well as the signal description, |
82 | .BR psiginfo () | |
83 | displays information about the origin of the signal, | |
84 | and other information relevant to the signal | |
85 | (e.g., the relevant memory address for hardware-generated signals, | |
86 | the child process ID for | |
87 | .BR SIGCHLD , | |
88 | and the user ID and process ID of the sender, for signals set using | |
89 | .BR kill (2) | |
90 | or | |
485ab701 | 91 | .BR sigqueue (3)). |
847e0d88 | 92 | .PP |
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93 | The array \fIsys_siglist\fP holds the signal description strings |
94 | indexed by signal number. | |
47297adb | 95 | .SH RETURN VALUE |
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96 | The |
97 | .BR psignal () | |
58ac0956 GJ |
98 | and |
99 | .BR psiginfo () | |
100 | functions return no value. | |
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101 | .SH VERSIONS |
102 | The | |
b1e9ce70 | 103 | .BR psiginfo () |
a2d58b15 | 104 | function was added to glibc in version 2.10. |
d71055db ZL |
105 | .SH ATTRIBUTES |
106 | For an explanation of the terms used in this section, see | |
107 | .BR attributes (7). | |
108 | .TS | |
109 | allbox; | |
110 | lbw21 lb lb | |
111 | l l l. | |
112 | Interface Attribute Value | |
113 | T{ | |
114 | .BR psignal (), | |
115 | .BR psiginfo () | |
116 | T} Thread safety MT-Safe locale | |
117 | .TE | |
847e0d88 | 118 | .sp 1 |
47297adb | 119 | .SH CONFORMING TO |
2773008f | 120 | POSIX.1-2008, 4.3BSD. |
a2d58b15 | 121 | .SH BUGS |
930e3731 | 122 | In glibc versions up to 2.12, |
a2d58b15 | 123 | .BR psiginfo () |
930e3731 | 124 | had the following bugs: |
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125 | .IP * 3 |
126 | In some circumstances, a trailing newline is not printed. | |
bea08fec | 127 | .\" FIXME . http://sourceware.org/bugzilla/show_bug.cgi?id=12107 |
930e3731 | 128 | .\" Reportedly now fixed; check glibc 2.13 |
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129 | .IP * |
130 | Additional details are not displayed for real-time signals. | |
bea08fec | 131 | .\" FIXME . http://sourceware.org/bugzilla/show_bug.cgi?id=12108 |
930e3731 | 132 | .\" Reportedly now fixed; check glibc 2.13 |
47297adb | 133 | .SH SEE ALSO |
0de14770 | 134 | .BR sigaction (2), |
fea681da | 135 | .BR perror (3), |
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136 | .BR strsignal (3), |
137 | .BR signal (7) |