libexplain
1.4.D001
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#include <libexplain/ac/unistd.h>
#include <libexplain/buffer/errno/setdomainname.h>
#include <libexplain/setdomainname.h>
Go to the source code of this file.
Functions | |
void | explain_message_errno_setdomainname (char *message, int message_size, int errnum, const char *data, size_t data_size) |
void explain_message_errno_setdomainname | ( | char * | message, |
int | message_size, | ||
int | errnum, | ||
const char * | data, | ||
size_t | data_size | ||
) |
The explain_message_errno_setdomainname function is used to obtain an explanation of an error returned by the setdomainname(2) system call. The least the message will contain is the value of strerror(errnum)
, but usually it will do much better, and indicate the underlying cause in more detail.
message | The location in which to store the returned message. If a suitable message return buffer is supplied, this function is thread safe. |
message_size | The size in bytes of the location in which to store the returned message. |
errnum | The error value to be decoded, usually obtained from the errno global variable just before this function is called. This is necessary if you need to call any code between the system call to be explained and this function, because many libc functions will alter the value of errno. |
data | The original data, exactly as passed to the setdomainname(2) system call. |
data_size | The original data_size, exactly as passed to the setdomainname(2) system call. |
if (setdomainname(data, data_size) < 0) { int err = errno; char message[3000]; explain_message_errno_setdomainname(message, sizeof(message), err, data, data_size); fprintf(stderr, "%s\n", message); exit(EXIT_FAILURE); }
Definition at line 26 of file setdomainname.c.