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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14 | .\" manual page may be incorrect or out-of-date.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) | |
58ac0956 | 30 | .TH PSIGNAL 3 2010-10-06 "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> | |
36 | .sp | |
37 | .BI "void psignal(int " sig ", const char *" s ); | |
58ac0956 | 38 | .BI "void psiginfo(const siginfo_t *" pinfo ", const char *" s ); |
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39 | .sp |
40 | .BI "extern const char *const " sys_siglist []; | |
41 | .fi | |
cc4615cc MK |
42 | .sp |
43 | .in -4n | |
44 | Feature Test Macro Requirements for glibc (see | |
45 | .BR feature_test_macros (7)): | |
46 | .in | |
47 | .sp | |
48 | .BR psignal (): | |
49 | _SVID_SOURCE || _BSD_SOURCE | |
50 | .br | |
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51 | .BR psiginfo (): |
52 | _XOPEN_SOURCE\ >=\ 700 || _POSIX_C_SOURCE\ >=\ 200809L | |
53 | .br | |
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54 | .IR sys_siglist : |
55 | _BSD_SOURCE | |
fea681da | 56 | .SH DESCRIPTION |
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57 | The |
58 | .BR psignal () | |
59 | function displays a message on \fIstderr\fP | |
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60 | consisting of the string \fIs\fP, a colon, a space, a string |
61 | describing the signal number \fIsig\fP, and a trailing newline. | |
62 | If the string \fIs\fP is NULL or empty, the colon and space are omitted. | |
1c44bd5b | 63 | If \fIsig\fP is invalid, |
fea681da | 64 | the message displayed will indicate an unknown signal. |
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65 | |
66 | The | |
67 | .BR psiginfo () | |
68 | function is like | |
69 | .BR psignal (), | |
70 | except that it displays information about the signal described by | |
71 | .IR pinfo , | |
72 | which should point to a valid | |
73 | .I siginfo_t | |
74 | structure. | |
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75 | As well as the signal description, |
76 | .BR psiginfo () | |
77 | displays information about the origin of the signal, | |
78 | and other information relevant to the signal | |
79 | (e.g., the relevant memory address for hardware-generated signals, | |
80 | the child process ID for | |
81 | .BR SIGCHLD , | |
82 | and the user ID and process ID of the sender, for signals set using | |
83 | .BR kill (2) | |
84 | or | |
485ab701 | 85 | .BR sigqueue (3)). |
58ac0956 | 86 | |
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87 | The array \fIsys_siglist\fP holds the signal description strings |
88 | indexed by signal number. | |
47297adb | 89 | .SH RETURN VALUE |
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90 | The |
91 | .BR psignal () | |
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92 | and |
93 | .BR psiginfo () | |
94 | functions return no value. | |
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95 | .SH VERSIONS |
96 | The | |
b1e9ce70 | 97 | .BR psiginfo () |
a2d58b15 | 98 | function was added to glibc in version 2.10. |
47297adb | 99 | .SH CONFORMING TO |
2773008f | 100 | POSIX.1-2008, 4.3BSD. |
a2d58b15 | 101 | .SH BUGS |
930e3731 | 102 | In glibc versions up to 2.12, |
a2d58b15 | 103 | .BR psiginfo () |
930e3731 | 104 | had the following bugs: |
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105 | .IP * 3 |
106 | In some circumstances, a trailing newline is not printed. | |
107 | .\" FIXME http://sourceware.org/bugzilla/show_bug.cgi?id=12107 | |
930e3731 | 108 | .\" Reportedly now fixed; check glibc 2.13 |
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109 | .IP * |
110 | Additional details are not displayed for real-time signals. | |
111 | .\" FIXME http://sourceware.org/bugzilla/show_bug.cgi?id=12108 | |
930e3731 | 112 | .\" Reportedly now fixed; check glibc 2.13 |
47297adb | 113 | .SH SEE ALSO |
0de14770 | 114 | .BR sigaction (2), |
fea681da | 115 | .BR perror (3), |
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116 | .BR strsignal (3), |
117 | .BR signal (7) |