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Top Forums Shell Programming and Scripting concatenate all duplicate line in a file. Post 302230132 by shamrock on Thursday 28th of August 2008 05:12:19 PM
Old 08-28-2008
Are you going back and forth between UNIX and DOS?? The Ctrl-M (^M) characters in your output are indicative of mixing UNIX and DOS.
 

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STRACAT(3pub)						       C Programmer's Manual						     STRACAT(3pub)

NAME
stracat - concatenate many strings into an allocated memory block SYNOPSIS
#include <publib.h> char *stracat(const char *s, ...); DESCRIPTION
stracat will allocate a block of memory with malloc and concatenate all arguments strings into this block. The user is supposed to free the returned block. The end of the argument list is signalled by a null pointer. RETURN VALUE
stracat returns a pointer to the allocated block, or NULL if it could not be allocated. EXAMPLE
To concatenate "hello, " and "world", one might say the following. p = stracat("hello, ", "world", (char *)NULL); if (p != NULL) puts(p); Please note that it is necessary to case NULL as in the example above, since there is no information about the type of the argument available in the prototype, and since an unadorned NULL might not be of the correct type. (See any good C reference book or the comp.lang.c FAQ for more information.) SEE ALSO
publib(3), strcat(3) AUTHOR
Lars Wirzenius (lars.wirzenius@helsinki.fi) Publib C Programmer's Manual STRACAT(3pub)
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