memchr(3p) — Linux manual page

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

       memchr — find byte in memory

SYNOPSIS

       #include <string.h>

       void *memchr(const void *s, int c, size_t n);

DESCRIPTION

       The functionality described on this reference page is aligned
       with the ISO C standard. Any conflict between the requirements
       described here and the ISO C standard is unintentional. This
       volume of POSIX.1‐2017 defers to the ISO C standard.

       The memchr() function shall locate the first occurrence of c
       (converted to an unsigned char) in the initial n bytes (each
       interpreted as unsigned char) pointed to by s.

       Implementations shall behave as if they read the memory byte by
       byte from the beginning of the bytes pointed to by s and stop at
       the first occurrence of c (if it is found in the initial n
       bytes).

RETURN VALUE

       The memchr() function shall return a pointer to the located byte,
       or a null pointer if the byte is not found.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       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                        MEMCHR(3P)

Pages that refer to this page: string.h(0p)

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