1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
|
/* SPDX-FileCopyrightText: 2021 John Scott <jscott@posteo.net>
* SPDX-License-Identifier: GPL-3.0-or-later */
#define _POSIX_C_SOURCE 200809L
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main(int argc, char *argv[static argc+1]) {
size_t n = 1;
for(int i = 1; i < argc; i++) {
size_t k = strlen(argv[i]) + 1;
if(!k || n + k < n || n + k < k) {
errno = EOVERFLOW;
perror("Failed to concatenate string");
exit(EXIT_FAILURE);
}
n += k;
}
char str[n];
str[0] = '\0';
char *tmp = str;
for(int i = 1; i < argc; i++) {
tmp = stpcpy(tmp, argv[i]);
if(i != argc - 1) {
*tmp++ = ' ';
}
}
if(puts(str) == EOF) {
perror("Failed to print concatenated string");
exit(EXIT_FAILURE);
}
}
|
