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- const char *prefix = "/Users/jetbrains/Desktop/log-";
- const char *ext = ".txt";
- char file_name[strlen(prefix) + strlen(who_am_i()) + strlen(ext)];
- strcpy(file_name, prefix);
- strcat(file_name, who_am_i());
- strcat(file_name, ext);
- FILE *log = fopen(file_name, "a");
- fprintf(log, "\n|");
- char data[len];
- memcpy(data, buf, len);
- fwrite(data, len, 1, log);
- fprintf(log, "|\n");
- fclose(log);
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