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

Go to the source code of this file.

Functions

void explain_buffer_errno_ungetc (explain_string_buffer_t *sb, int errnum, int c, FILE *fp)
void explain_buffer_errno_ungetc_explanation (explain_string_buffer_t *sb, int errnum, const char *syscall_name, int c, FILE *fp)

Function Documentation

void explain_buffer_errno_ungetc ( explain_string_buffer_t sb,
int  errnum,
int  c,
FILE *  fp 
)

The explain_buffer_errno_ungetc function is used to obtain an explanation of an error returned by the ungetc(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.
cThe original c, exactly as passed to the ungetc(3) system call.
fpThe original fp, exactly as passed to the ungetc(3) system call.

Definition at line 88 of file ungetc.c.

void explain_buffer_errno_ungetc_explanation ( explain_string_buffer_t sb,
int  errnum,
const char *  syscall_name,
int  c,
FILE *  fp 
)

The explain_buffer_errno_ungetc_explanation function is used to obtain the explanation (the part after "because") of an error returned by the ungetc(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.
cThe original c, exactly as passed to the ungetc(3) system call.
fpThe original fp, exactly as passed to the ungetc(3) system call.

Definition at line 46 of file ungetc.c.