libexplain
1.4.D001
|
Go to the source code of this file.
Functions | |
void | explain_message_chmod (char *message, int message_size, const char *pathname, int mode) |
void explain_message_chmod | ( | char * | message, |
int | message_size, | ||
const char * | pathname, | ||
int | mode | ||
) |
The explain_message_chmod function is used to obtain an explanation of an error returned by the chmod(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.
The errno global variable will be used to obtain the error value to be decoded.
This function is intended to be used in a fashion similar to the following example:
if (chmod(pathname, mode) < 0) { char message[3000]; explain_message_chmod(message, sizeof(message), pathname, mode); fprintf(stderr, "%s\n", message); exit(EXIT_FAILURE); }
The above code example is available pre-packaged as the explain_chmod_or_die function.
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. |
pathname | The original pathname, exactly as passed to the chmod(2) system call. |
mode | The original mode, exactly as passed to the chmod(2) system call. |