Linux strncpy () and STRCAT usage Summary

Strcat prototype: Char *strcat (char *dest,const char *src);

Add the string src refers to at the end of the dest (overwrite ' + ' at the end of the dest) and add '% '. The memory areas referred to by SRC and dest cannot overlap and dest must have enough space to accommodate the SRC string.

strncpy () Prototype: char * strncpy (char *dest, const char *SRC, size_t N);

The parameter description dest is the target string pointer, and SRC is the source string pointer. strncpy () copies the first n characters of the string src to the string dest. The memory areas referred to by SRC and dest cannot overlap, and dest must have enough space to place n characters.

Unlike strcpy (), strncpy () does not append an end tag to dest ' \ ', so using strcat after strncpy () is problematic because it cannot be found.

Linux strncpy () and STRCAT usage Summary