1STRSIGNAL(3P)              POSIX Programmer's Manual             STRSIGNAL(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

13       strsignal — get name of signal
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SYNOPSIS

16       #include <string.h>
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18       char *strsignal(int signum);
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DESCRIPTION

21       The strsignal() function shall map the signal number in  signum  to  an
22       implementation-defined  string  and  shall  return a pointer to it.  It
23       shall use the same set of messages as the psignal() function.
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25       The application shall not modify  the  string  returned.  The  returned
26       pointer might be invalidated or the string content might be overwritten
27       by a subsequent call to strsignal() or setlocale().
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29       The contents of the message strings returned by strsignal()  should  be
30       determined  by  the  setting of the LC_MESSAGES category in the current
31       locale.
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33       The implementation shall behave as if no function defined in this stan‐
34       dard calls strsignal().
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36       Since  no return value is reserved to indicate an error, an application
37       wishing to check for error situations should set errno to 0, then  call
38       strsignal(), then check errno.
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40       The strsignal() function need not be thread-safe.
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RETURN VALUE

43       Upon  successful  completion,  strsignal()  shall return a pointer to a
44       string. Otherwise, if signum is not a valid signal number,  the  return
45       value is unspecified.
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ERRORS

48       No errors are defined.
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50       The following sections are informative.
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EXAMPLES

53       None.
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APPLICATION USAGE

56       None.
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RATIONALE

59       If  signum  is  not  a valid signal number, some implementations return
60       NULL, while for others the strsignal() function returns a pointer to  a
61       string  containing  an  unspecified message denoting an unknown signal.
62       POSIX.1‐2008 leaves this return value unspecified.
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FUTURE DIRECTIONS

65       None.
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SEE ALSO

68       psiginfo(), setlocale()
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70       The Base Definitions volume of POSIX.1‐2008, <string.h>
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73       Portions of this text are reprinted and reproduced in  electronic  form
74       from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
75       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
76       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
77       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
78       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
79       event of any discrepancy between this version and the original IEEE and
80       The  Open Group Standard, the original IEEE and The Open Group Standard
81       is the referee document. The original Standard can be  obtained  online
82       at http://www.unix.org/online.html .
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84       Any  typographical  or  formatting  errors that appear in this page are
85       most likely to have been introduced during the conversion of the source
86       files  to  man page format. To report such errors, see https://www.ker‐
87       nel.org/doc/man-pages/reporting_bugs.html .
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91IEEE/The Open Group                  2013                        STRSIGNAL(3P)
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