08-29-2012
Thanks for your quick replies!
pravin27, unfortunatelly haven't been able to execute the code successfully. Probably due to my lack of knowlege and understanding.
I am a rookie, I'm afraid
Don Kragun, that worked perfectly, problem solved.
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LEARN ABOUT DEBIAN
xstrdup
XMALLOC(3pub) C Programmer's Manual XMALLOC(3pub)
NAME
xmalloc, xrealloc, xfree, xstrdup, xmemdup, memdup - memory allocation functions for Publib
SYNOPSIS
#include <publib.h>
void *xmalloc(size_t bytes);
void *xrealloc(void *ptr, size_t bytes);
void xfree(void *ptr);
char *xstrdup(const char *string);
void *memdup(const void *mem, size_t bytes);
void *xmemdup(const void *mem, size_t bytes);
DESCRIPTION
These functions are utility functions for memory allocation from the publib library. xmalloc, xrealloc, and xfree are error checking ver-
sions of the standard library routines malloc, realloc, and free, respectively. They are guaranteed to never return unless there was no
problem: if, for example, xmalloc is unable to allocate the requested amount of memory, it prints an error message and terminates the pro-
gram. Hence, the caller does not need to check for a NULL return value, and the code that calls these functions is simpler due to the lack
of error checks.
Similarly, xstrdup is an error checking version of the common (though not standard) strdup routine, which creates a duplicate of a string
by allocating memory for the copy with malloc. (For systems that lack strdup, publib provides one in its portability module; it is always
declared in <publib.h>.)
memdup is similar to strdup, it creates a copy of an arbitrary memory area (the arguments are a pointer to the beginning of the area, and
its size) by allocating memory for the copy with malloc. xmemdup is its error checking version.
NOTE
xmalloc and xrealloc treat a request to allocate a block of 0 bytes as an error. xrealloc will allow its first argument to be NULL.
SEE ALSO
publib(3), malloc(3), strdup(3)
AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi)
Publib C Programmer's Manual XMALLOC(3pub)