linux 写文件 write

ssize_t write(int fd, const void *buf, size_t count);

#include <fcntl.h>
#include <unistd.h>
#include <string.h>

int main() {
    int fd = open("example.txt", O_WRONLY | O_CREAT, 0644);
    if (fd == -1) {
        // 错误处理
        return 1;
    }

    const char *message = "Hello, Linux!\n";
    ssize_t bytes_written = write(fd, message, strlen(message));

    if (bytes_written == -1) {
        // 错误处理
        close(fd);
        return 1;
    }

    close(fd);
    return 0;
}

ssize_t total_written = 0;
while (total_written < count) {
    ssize_t bytes = write(fd, buf + total_written, count - total_written);
    if (bytes == -1) {
        // 错误处理
        break;
    }
    total_written += bytes;
}