libexplain  1.4.D001
Functions
libexplain/buffer/errno/unsetenv.h File Reference
#include <libexplain/string_buffer.h>

Go to the source code of this file.

Functions

void explain_buffer_errno_unsetenv (explain_string_buffer_t *sb, int errnum, const char *name)
void explain_buffer_errno_unsetenv_explanation (explain_string_buffer_t *sb, int errnum, const char *syscall_name, const char *name)

Function Documentation

void explain_buffer_errno_unsetenv ( explain_string_buffer_t sb,
int  errnum,
const char *  name 
)

The explain_buffer_errno_unsetenv function is used to obtain an explanation of an error returned by the unsetenv(3) 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.

Parameters:
sbThe string buffer to print the message into. If a suitable buffer is specified, this function is thread safe.
errnumThe 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.
nameThe original name, exactly as passed to the unsetenv(3) system call.

Definition at line 65 of file unsetenv.c.

void explain_buffer_errno_unsetenv_explanation ( explain_string_buffer_t sb,
int  errnum,
const char *  syscall_name,
const char *  name 
)

The explain_buffer_errno_unsetenv_explanation function is used to obtain the explanation (the part after "because") of an error returned by the unsetenv(3) system call (and similar).

Parameters:
sbThe string buffer to print the message into. If a suitable buffer is specified, this function is thread safe.
errnumThe 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.
syscall_nameThe name of the offending system call.
nameThe original name, exactly as passed to the unsetenv(3) system call.

Definition at line 41 of file unsetenv.c.