strsignal(3p) — Linux manual page

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
       corresponding 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 returned pointer might also be invalidated if
       the calling thread is terminated.

       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(3p), setlocale(3p)

       The Base Definitions volume of POSIX.1‐2017, string.h(0p)

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic
       form from IEEE Std 1003.1-2017, Standard for Information
       Technology -- Portable Operating System Interface (POSIX), The
       Open Group Base Specifications Issue 7, 2018 Edition, Copyright
       (C) 2018 by the Institute of Electrical and Electronics
       Engineers, Inc and The Open Group.  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
       Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/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               2017                     STRSIGNAL(3P)

Pages that refer to this page: string.h(0p), psiginfo(3p), setlocale(3p)

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