将perror输出重定向到fprintf（stderr，“”）

Question

In case a system call function fails, we normally use perror to output the error message. I want to use fprintf to output the perror string. How can I do something like this:

fprintf(stderr, perror output string here);

Answer 1

#include <errno.h>

fprintf(stderr, "%s\n", strerror(errno));

Note: strerror doesn't apply \\n to the end of the message