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

Go to the source code of this file.

Functions

void explain_buffer_errno_waitpid (explain_string_buffer_t *sb, int errnum, int pid, int *status, int options)
void explain_buffer_errno_waitpid_explanation (explain_string_buffer_t *sb, int errnum, const char *syscall_name, int pid, int *status, int options)

Function Documentation

void explain_buffer_errno_waitpid ( explain_string_buffer_t sb,
int  errnum,
int  pid,
int *  status,
int  options 
)

The explain_buffer_errno_waitpid function is used to obtain an explanation of an error returned by the waitpid(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 safe 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.
pidThe original pid, exactly as passed to the waitpid(2) system call.
statusThe original status, exactly as passed to the waitpid(2) system call.
optionsThe original options, exactly as passed to the waitpid(2) system call.

Definition at line 188 of file waitpid.c.

void explain_buffer_errno_waitpid_explanation ( explain_string_buffer_t sb,
int  errnum,
const char *  syscall_name,
int  pid,
int *  status,
int  options 
)

The explain_buffer_errno_waitpid_explanation function is used by explain_buffer_errno_waitpid function (and others) to obtain an explanation of an error returned by one of the wait*(2) system calls.

Parameters:
sbThe string buffer to print the message into.
errnumThe error value to be decoded.
syscall_nameThe name of the offending system call.
pidThe original pid, exactly as passed to the waitpid(2) system call.
statusThe original status, exactly as passed to the waitpid(2) system call.
optionsThe original options, exactly as passed to the waitpid(2) system call.

Definition at line 65 of file waitpid.c.