What error is errno=2?

I called execl() and found errno=2.

What does errno=2 mean? What if I just give you the error number?

2022-09-21 17:53

1 Answers

Each errno has its own meaning. But it's just uncomfortable for people to read

trror() or error can replace the error number with a human-readable form.

#include <errno.h>

int main(void) {
    FILE* fp;
    if((fp = fopen("hello", "r") == 0){ // open missing file
        printf("strerror(errno) : %s\n", strerror(errno));
        perror("perror : ");
    }
}

Output:

strerror(errno) : No such file or directory
perror : : No such file or directory

2022-09-21 17:53

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