Code snippet for signals Post: 302465447

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LEARN ABOUT POSIX

strsignal

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

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       strsignal -- get name of signal

SYNOPSIS

       #include <string.h>

       char *strsignal(int signum);

DESCRIPTION

       The strsignal() function shall map the signal number in signum to an implementation-defined string and shall return a pointer  to  it.	It
       shall use the same set of messages as the psignal() function.

       The  application shall not modify the string returned. The returned pointer might be invalidated or the string content might be overwritten
       by a subsequent call to strsignal() or setlocale().

       The contents of the message strings returned by strsignal() should be determined by the setting of the LC_MESSAGES category in the  current
       locale.

       The implementation shall behave as if no function defined in this standard calls strsignal().

       Since  no  return  value is reserved to indicate an error, an application wishing to check for error situations should set errno to 0, then
       call strsignal(), then check errno.

       The strsignal() function need not be thread-safe.

RETURN VALUE

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

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

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

FUTURE DIRECTIONS

       None.

SEE ALSO

       psiginfo(), setlocale()

       The Base Definitions volume of POSIX.1-2008, <string.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy  --	Portable  Operating  System  Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
       event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most likely to have been introduced during the conversion of the source
       files to man page format. To report such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE
/The Open Group						       2013							     STRSIGNAL(3P)