Redirect perror output to fprintf(stderr, “ ”)

问题

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);

回答1:

#include <errno.h>

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

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

来源：https://stackoverflow.com/questions/5483120/redirect-perror-output-to-fprintfstderr