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/* SPDX-License-Identifier: BSD-3-Clause */
/*
* Copyright (C) 2022, 2023 Ferass El Hafidi <vitali64pmemail@protonmail.com>
*/
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#define REQ_PRINT_USAGE /* Require print_usage() from ../common/common.h */
#define REQ_ERRPRINT /* Require errprint() from ../common/common.h */
#define DESCRIPTION "Link files."
#define OPERANDS "[-fs] [-P|-L] source_file target_file"
#include "../common/common.h"
int getopt(int argc, char *const argv[], const char *optstring);
int main(int argc, char *const argv[]) {
int argument;
char param[256], *buffer = NULL, *argv0 = strdup(argv[0]);
while ((argument = getopt(argc, argv, "fsPL")) != -1) {
if (argument == '?') {
print_usage(argv[0], DESCRIPTION, OPERANDS, VERSION);
return 1;
}
param[argument] = argument;
} argc -= optind; argv += optind;
if (argc != 2) {
print_usage(argv[0], DESCRIPTION, OPERANDS, VERSION);
return 1;
}
if (param['f']) remove(argv[1]);
if (errno && errno != ENOENT) return errprint(argv0, argv[0], errno);
errno = 0; /* Not reached if errno == ENOENT (no such file) */
if (param['s']) symlink(argv[0], argv[1]);
/* The -P option is the default behavior (at least on musl),
* so no if statement.
*/
else if (param['L']) {
readlink(argv[0], buffer, strlen(buffer)); /* Read the link */
if (errno) return errprint(argv0, argv[0], errno);
link(buffer, argv[1]);
}
else link(argv[0], argv[1]);
return errprint(argv0, argv[0], errno);
}
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