books/apitue/sample-code/04/lns.c

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2024-01-20 14:39:54 +00:00
/* This file is part of the sample code and exercises
* used by the class "Advanced Programming in the UNIX
* Environment" taught by Jan Schaumann
* <jschauma@netmeister.org> at Stevens Institute of
* Technology.
*
* This file is in the public domain.
*
* You don't have to, but if you feel like
* acknowledging where you got this code, you may
* reference me by name, email address, or point
* people to the course website:
* https://stevens.netmeister.org/631/
*/
/* The world's most trivial 'ln -s', in a way. */
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
int
main(int argc, char **argv) {
if (argc != 3) {
fprintf(stderr, "Usage: %s source target\n", argv[0]);
exit(EXIT_FAILURE);
}
if (symlink(argv[1], argv[2]) < 0) {
fprintf(stderr, "Unable to symlink '%s' to '%s': %s\n",
argv[2], argv[1], strerror(errno));
exit(EXIT_FAILURE);
}
return EXIT_SUCCESS;
}