I'm looking for an example of how to use the realpath function in a C program. I can't seem to find one on the web or in any of my C programming books.
The realpath()
function is not described in the C Standard. It is however described by POSIX 1997 and POSIX 2008. If that is what you mean, here is an example:
#include <limits.h> /* PATH_MAX */
#include <stdio.h>
#include <stdlib.h>
int main(void) {
char buf[PATH_MAX]; /* PATH_MAX incudes the \0 so +1 is not required */
char *res = realpath("this_source.c", buf);
if (res) {
printf("This source is at %s.\n", buf);
} else {
perror("realpath");
exit(EXIT_FAILURE);
}
return 0;
}
PATH_MAX is defined in <limits.h> (<limits.h> from POSIX 1997)