psignal(3)

1PSIGNAL(3)                 Linux Programmer's Manual                PSIGNAL(3)
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NAME

6       psignal, psiginfo - print signal description
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SYNOPSIS

9       #include <signal.h>
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11       void psignal(int sig, const char *s);
12       void psiginfo(const siginfo_t *pinfo, const char *s);
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14       extern const char *const sys_siglist[];
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16   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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18       psignal():
19           Since glibc 2.19:
20               _DEFAULT_SOURCE
21           Glibc 2.19 and earlier:
22               _BSD_SOURCE || _SVID_SOURCE
23       psiginfo(): _POSIX_C_SOURCE >= 200809L
24       sys_siglist:
25           Since glibc 2.19:
26               _DEFAULT_SOURCE
27           Glibc 2.19 and earlier:
28               _BSD_SOURCE
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DESCRIPTION

31       The  psignal()  function displays a message on stderr consisting of the
32       string s, a colon, a space, a string describing the signal number  sig,
33       and  a  trailing  newline.  If the string s is NULL or empty, the colon
34       and space are omitted.  If sig is invalid, the message  displayed  will
35       indicate an unknown signal.
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37       The  psiginfo()  function  is  like  psignal(), except that it displays
38       information about the signal described by pinfo, which should point  to
39       a  valid siginfo_t structure.  As well as the signal description, psig‐
40       info() displays information about the origin of the signal,  and  other
41       information  relevant  to the signal (e.g., the relevant memory address
42       for hardware-generated signals, the child process ID for  SIGCHLD,  and
43       the user ID and process ID of the sender, for signals set using kill(2)
44       or sigqueue(3)).
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46       The array sys_siglist holds the signal description strings  indexed  by
47       signal number.
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RETURN VALUE

50       The psignal() and psiginfo() functions return no value.
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VERSIONS

53       The psiginfo() function was added to glibc in version 2.10.
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ATTRIBUTES

56       For   an   explanation   of   the  terms  used  in  this  section,  see
57       attributes(7).
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59       ┌──────────────────────┬───────────────┬────────────────┐
60       │Interface             │ Attribute     │ Value          │
61       ├──────────────────────┼───────────────┼────────────────┤
62       │psignal(), psiginfo() │ Thread safety │ MT-Safe locale │
63       └──────────────────────┴───────────────┴────────────────┘
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CONFORMING TO

66       POSIX.1-2008, 4.3BSD.
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BUGS

69       In glibc versions up to 2.12, psiginfo() had the following bugs:
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71       *  In some circumstances, a trailing newline is not printed.
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73       *  Additional details are not displayed for real-time signals.
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COLOPHON

79       This page is part of release 5.07 of the Linux  man-pages  project.   A
80       description  of  the project, information about reporting bugs, and the
81       latest    version    of    this    page,    can     be     found     at
82       https://www.kernel.org/doc/man-pages/.
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86GNU                               2017-09-15                        PSIGNAL(3)