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

Go to the source code of this file.

Functions

void explain_buffer_errno_ptrace (explain_string_buffer_t *sb, int errnum, int request, pid_t pid, void *addr, void *data)
void explain_buffer_errno_ptrace_explanation (explain_string_buffer_t *sb, int errnum, const char *syscall_name, int request, pid_t pid, void *addr, void *data)

Function Documentation

void explain_buffer_errno_ptrace ( explain_string_buffer_t sb,
int  errnum,
int  request,
pid_t  pid,
void *  addr,
void *  data 
)

The explain_buffer_errno_ptrace function is used to obtain an explanation of an error returned by the ptrace(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.

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.
requestThe original request, exactly as passed to the ptrace(2) system call.
pidThe original pid, exactly as passed to the ptrace(2) system call.
addrThe original addr, exactly as passed to the ptrace(2) system call.
dataThe original data, exactly as passed to the ptrace(2) system call.

Definition at line 562 of file ptrace.c.

void explain_buffer_errno_ptrace_explanation ( explain_string_buffer_t sb,
int  errnum,
const char *  syscall_name,
int  request,
pid_t  pid,
void *  addr,
void *  data 
)

The explain_buffer_errno_ptrace_explanation function is used to obtain the explanation (the part after "because") of an error returned by the ptrace(2) 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.
requestThe original request, exactly as passed to the ptrace(2) system call.
pidThe original pid, exactly as passed to the ptrace(2) system call.
addrThe original addr, exactly as passed to the ptrace(2) system call.
dataThe original data, exactly as passed to the ptrace(2) system call.

Definition at line 366 of file ptrace.c.