Linux Certif

Toute la documentation sur la certification Linux LPI

explain

NAME

explain - explain system call error messages

SYNOPSIS

explain [ option ... ] function [ argument ... ]

explain --version

DESCRIPTION

The explain command is used to decode an error return read from an strace(1) listing, or silimar. Because thisd is being deciphered in a different process than the orginal, the results will be less accurate than if the program itself were to use libexplain(3).

Functions

The functions understood include:

accept fildes addr addrlen

The accept(2) system call.

accept4 fildes [[ sock_addr sock_addr_size ] flags ]

The accept4(2) system call.

access pathname

The access(2) system call.

acct pathname

The acct(2) system call.

adjtime delta olddelta

The adjtime(2) system call.

adjtimex data

The adjtimex(2) system call.

bind fildes addr sockaddr_size

The bind(2) system call.

chdir pathname

The chdir(2) system call.

chmod pathname permission-mode

The chmod(2) system call.

chown pathname owner group

The chown(2) system call.

chroot pathname

The chroot(2) system call.

close fildes

The close(2) system call.

closedir dir

The closedir(3) system call.

connect fildes serv_addr serv_addr_size

The connect(2) system call.

creat pathname [ permission-mode

The creat(2) system call.

dirfd dir

The dirfd(3) system call.

dup fildes

The dup(2) system call.

dup2 oldfd newfd

The dup2(2) system call.

eventfd initval flags

The eventfd(2) system call.

execve pathname arg...

The execve(2) system call.

execvp pathname arg...

The execvp(3) system call.

fchdir pathname

The fchdir(2) system call.

fchown fildes owner group

The fchown(2) system call.

fcntl fildes command [ arg ]

The fcntl(2) system call.

fdopen fd mode

The fdopen(3) system call.

ferror fp

The ferror(3) system call.

fflush fp

The fflush(3) system call.

fgetc fp

The fgetc(3) system call.

fgets data data_size fp

The fgets(3) system call.

fileno fp

The fileno(3) system call.

flock fildes command

The flock(2) system call.

fork

The fork(2) system call.

fpathconf fildes name

The fpathconf(3) system call.

fread ptr size nmemb fp

The fread(3) system call.

fopen pathname mode

The fopen(2) system call. The pathname argument may need to be quoted to insulate white space and punctuation from the shell. The mode argument (a textual equivalent of the open system call's flags argument). See fopen(3) for more information.

fputc c [ fp ]

The fputc(3) system call.

fstat pathname

The fstat(2) system call.

fstatfs fildes data

The fstatfs(2) system call.

ftime tp

The ftime(3) system call.

ftruncate fildes length

The ftruncate(2) system call.

futimes fildes tv[0] tv[1]

The futimes(3) system call.

getc fp

The getc(3) system call.

getchar

The getchar(3) system call.

getcwd buf size

The getcwd(2) system call.

getdomainname data data_size

The getdomainname(2) system call.

getgroups data_size data

The getgroups(2) system call.

getpeername fildes sock_addr sock_addr_size

The getpeername(2) system call.

gethostname [ data data_size ]

The gethostname(2) system call.

setsockopt fildes level name data data_size

The setsockopt(2) system call.

getrlimit resource rlim

The getrlimit(2) system call.

getsockname fildes [ sock_addr [ sock_addr_size ]]

The getsockname(2) system call.

getsockopt fildes level name data data_size

The getsockopt(2) system call.

gettimeofday [ tv [ tz ] ]

The gettimeofday(2) system call.

ioctl fildes request data

The ioctl(2) system call.

kill pid sig

The kill(2) system call.

lchown pathname owner group

The lchown(2) system call.

link oldpath newpath

The link(2) system call.

listen fildes backlog

The listen(2) system call.

lseek fildes offset whence

The lseek(2) system call.

lstat pathname

The lstat(2) system call.

malloc size

The malloc(3) system call.

mkdir pathname [ mode ]

The mkdir(2) system call.

nice inc

The nice(2) system call.

open pathname flags [ mode ]

The open(2) system call. The pathname argument may need to be quoted to insulate white space and punctuation from the shell. The flags argument may be numeric or symbolic. The mode argument may be numeric or symbolic.

opendir pathname

The opendir(3) system call.

pathconf pathname name

The pathconf(3) system call.

pclose fp

The pclose(3) system call.

pipe pipefd

The pipe(2) system call.

popen command flags

The popen(3) system call.

pread fildes data data_size offset

The pread(2) system call.

putc c fp

The putc(3) system call.

putchar c

The putchar(3) system call.

pwrite fildes data data_size offset

The pwrite(2) system call.

read fildes data data-size

The read(2) system call.

realloc ptr size

The realloc(3) system call.

rename oldpath newpath

The rename(2) system call.

readv fildes iov ...

The readv(2) system call.

select nfds readfds writefds exceptfds timeout

The select(2) system call.

setdomainname data data_size

The setdomainname(2) system call.

setgroups data_size data

The setgroups(2) system call.

sethostname name [ name_size ]

The sethostname(2) system call.

signalfd fildes mask flags

The signalfd(2) system call.

socket domain type protocol

The socket(2) system call.

stat pathname

The stat(2) system call.

statfs pathname data

The statfs(2) system call.

strdup data

The strdup(3) system call.

strerror

The error given will be printed out with all known detail.

strndup data data_size

The strndup(3) system call.

strtod nptr endptr

The strtod(3) system call.

strtof nptr endptr

The strtof(3) system call.

strtol nptr endptr base

The strtol(3) system call.

strtold nptr endptr

The strtold(3) system call.

strtoll nptr endptr base

The strtoll(3) system call.

strtoul nptr endptr base

The strtoul(3) system call.

strtoull nptr endptr base

The strtoull(3) system call.

symlink oldpath newpath

The symlink(2) system call.

system command

The system(3) system call.

tcdrain fildes

The tcdrain(3) system call.

tcflow fildes action

The tcflow(3) system call.

tcflush fildes selector

The tcflush(3) system call.

tcgetattr fildes data

The tcgetattr(3) system call.

tcsendbreak fildes duration

The tcsendbreak(3) system call.

tcsetattr fildes options data

The tcsetattr(3) system call.

telldir dir

The telldir(3) system call.

time t

The time(2) system call.

timerfd_create clockid flags

The timerfd_create(2) system call.

truncate pathname size

The truncate(2) system call.

unlink pathname

The unlink(2) system call.

ustat dev ubuf

The ustat(2) system call.

utime pathname [ times ]

The utime(2) system call.

wait status

The wait(2) system call.

wait3 status options rusage

The wait3(2) system call.

wait4 pid status options rusage

The wait4(2) system call.

waitpid pid status options

The waitpid(2) system call.

write fildes data data-size

The write(2) system call.

writev fildes data data_size

The writev(2) system call.

Do not include the perentheses used to make the call.

OPTIONS

The explain command understands the following options:

-e number

The value of errno as a number (e.g. 2), or as a symbol (e.g. ENOENT), or as the text of its meaning (e.g. No such file or directory). You will need quotes to insulate spaces and punctuation from the shell.

-V

Print the version of the explain executing.

EXIT STATUS

The explain command exits with status 1 on any error. The explain command only exits with status 0 if there are no errors.

COPYRIGHT

explain version 0.19
Copyright (C) 2008, 2009 Peter Miller

AUTHOR

Written by Peter Miller <pmiller@opensource.org.au>