1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | #include <stdio.h>
#include <stdlib.h>
int main(int argc, char* argv[]) {
// ./append log.txt "Something happened!"
if (argc != 3) {
fprintf(stderr, "Usage: %s <filename> <message>\n", argv[0]);
return EXIT_FAILURE;
}
char* filename = argv[1];
FILE* fp = fopen(filename, "w"); // "a" to append
fprintf(fp, "%s\n", argv[2]);
fclose(fp);
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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