Why segmentation(coredump) in the following code in C? Post: 302530484

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strnlen

STRNLEN(3)						     Linux Programmer's Manual							STRNLEN(3)

NAME

       strnlen - determine the length of a fixed-size string

SYNOPSIS

       #include <string.h>

       size_t strnlen(const char *s, size_t maxlen);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       strnlen():
	   Since glibc 2.10:
	       _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
	   Before glibc 2.10:
	       _GNU_SOURCE

DESCRIPTION

       The  strnlen()  function  returns the number of bytes in the string pointed to by s, excluding the terminating null bye (''), but at most
       maxlen.	In doing this, strnlen() looks only at the first maxlen bytes at s and never beyond s+maxlen.

RETURN VALUE

       The strnlen() function returns strlen(s), if that is less than maxlen, or maxlen if there is no null byte ('')  among	the  first  maxlen
       bytes pointed to by s.

CONFORMING TO

       POSIX.1-2008.

SEE ALSO

       strlen(3)

COLOPHON

       This  page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2012-05-10								STRNLEN(3)