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   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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16       psignal():
17           Since glibc 2.19:
18                   _DEFAULT_SOURCE
19           Glibc 2.19 and earlier:
20               _BSD_SOURCE || _SVID_SOURCE
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22       psiginfo():
23           _POSIX_C_SOURCE >= 200809L
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DESCRIPTION

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

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

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

48       For an  explanation  of  the  terms  used  in  this  section,  see  at‐
49       tributes(7).
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51       ┌─────────────────────────────────────┬───────────────┬────────────────┐
52       │Interface                            │ Attribute     │ Value          │
53       ├─────────────────────────────────────┼───────────────┼────────────────┤
54       │psignal(), psiginfo()                │ Thread safety │ MT-Safe locale │
55       └─────────────────────────────────────┴───────────────┴────────────────┘
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CONFORMING TO

58       POSIX.1-2008, 4.3BSD.
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BUGS

61       In glibc versions up to 2.12, psiginfo() had the following bugs:
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63       *  In some circumstances, a trailing newline is not printed.
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65       *  Additional details are not displayed for real-time signals.
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SEE ALSO

68       sigaction(2), perror(3), strsignal(3), signal(7)
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COLOPHON

71       This  page  is  part of release 5.12 of the Linux man-pages project.  A
72       description of the project, information about reporting bugs,  and  the
73       latest     version     of     this    page,    can    be    found    at
74       https://www.kernel.org/doc/man-pages/.
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78GNU                               2021-03-22                        PSIGNAL(3)
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