psignal(3)

1psignal(3)                 Library Functions Manual                 psignal(3)
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NAME

6       psignal, psiginfo - print signal description
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LIBRARY

9       Standard C library (libc, -lc)
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SYNOPSIS

12       #include <signal.h>
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14       void psignal(int sig, const char *s);
15       void psiginfo(const siginfo_t *pinfo, const char *s);
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17   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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19       psignal():
20           Since glibc 2.19:
21                   _DEFAULT_SOURCE
22           glibc 2.19 and earlier:
23               _BSD_SOURCE || _SVID_SOURCE
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25       psiginfo():
26           _POSIX_C_SOURCE >= 200809L
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DESCRIPTION

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

45       The psignal() and psiginfo() functions return no value.
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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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STANDARDS

58       POSIX.1-2008.
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HISTORY

61       glibc 2.10.  POSIX.1-2008, 4.3BSD.
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BUGS

64       Up to glibc 2.12, psiginfo() had the following bugs:
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66       •  In some circumstances, a trailing newline is not printed.
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68       •  Additional details are not displayed for real-time signals.
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