Table B-3. AIX and Linux System API Comparison: I/O Services
AIX | Linux | ERRNO(s) in AIX Not Implemented in Linux | Description |
|---|
access
accessx
faccessx | access | ESTALE
ETIMEDOUT | Checks user's permissions for a file. |
fclear
fclear64 | None | | Clears space in a file. |
fseek | fseek | EAGIN | Repositions a stream. |
ftell | ftell | EFBIG | |
rewind | rewind | EINTR | |
fgetpos | fgetpos | EIO | |
fsetpos | fsetpos | ENOSPC | |
fputc | fputc | EPIPE | Outputs character and strings. |
fputs | fputs | ENOMEM | |
putc | putc | EOVERFLOW | |
putchar | putchar | ESPIPE | |
puts | puts | | |
scanf | scanf | EAGIN | Inputs format conversion. |
fscanf | fscanf | EBADF | |
sscanf | sscanf | EINTR | |
| | | EIO | |
| | | EINVAL | |
| | | EILSEQ | |
| | | ENOMEM | |
fsync | fsync | EINVAL
EINTR | Synchronizes a file's complete in-core state with that on disk. |
getutent
setutent
enutent
utmptname
getutid
getutid_r
getutline_r
pututline_r
setutent_r
endutent_r
utmpname_r | getutent
getutent_r
getutid
getutid_r
gututline
gututline_r
putuline
setutent
endutent
utmpname | | Provides access user accounting database entries. Entries in the database are described by the definitions and data structures in <utmp.h>. |
lseek
lseek64
llseek | lseek
llseek
lseek64 | EOVERFLOW | Moves the read-write pointer to an open file. |
lockfx
lockf
flock | lockf
flock
fcntl | | Controls open files' descriptors. |
open
openx
creat | open
creat | EAGAIN
EDQUOT
EFBIG
EINTR
EIO
ENOSR
EOVERFLOW
ESTALE | Returns a file descriptor and creates files. |
pathconf
fpathconf | pathconf
fpathconf | ESTALE
ETIMEDOUT | Retrieves file implementation characteristics. |
read
readx
readv
readvx | read
readv, | EBADMSG
EDEADLK
EOVERFLOW
ENXIO
ESPIPE
ETIMEDOUT | Reads from a file descriptor. |
rename | rename | EDQUOT
ETIMEDOUT
ETXTBSY
ESTALE | Changes the name or location of a file. |
statx
stat
fstatx
fstat
fullstat
fullstat | stat
fstat
lstat | ESTALE
ETIMEDOUT
EIO | Gets file status. |
truncate
ftruncate
truncate64
ftruncate64 | truncate
ftrunncate
truncate64
ftruncate64 | EAGAIN
EDQUOT
EFBIG
EFBIG
EINTR
EMFILE
ENOSPC
ESTALE
ETIMEDOUT | Truncates a file to a specified length. |
umask | umask | | Sets file creation mask. |
utimes
utime | utimes
utime | EPERM
EACCES
EROFS | Changes access and/or modification times of an inode. |
write
writex
writev
writevx | write
writev, | EDQUOT
ENXIO
EFBIG
ERANGE
ESPIPE | Writes to a file descriptor. |
chdir | chdir | ESTALE
ETIMEDOUT | Changes working directory. |
chroot | chroot | ESTALE
ETIMEDOUT | Changes root directory. |
getwd
getcwd | get_current_
dir_name
getwd
getcwd | ENOMEM | Gets current working directory. |
glob
globfree | glob
globfree | | Finds path names matching a pattern, frees memory from glob(). |
link | link | EDQUOT
ENOSPC
ESTALE | Makes a new name for a file. |
mkdir | mkdir | EDQUOT
ETIMEOUT
ESTALE | Creates a directory. |
readdir
readdir_r | readdir
_syscall3 | | Returns current location in directory stream. |
printf | printf | EAGAIN | Formats output conversion. |
fprintf | fprintf | EABDF | |
sprintf | sprintf | EFBIG | |
snprintf | snprintf | EINTR | |
vprintf | vprintf | EIO | |
vfprintf | vfprintf | ENOSPC | |
vsprintf | vsprintf | EPIPE | |
vsnprintf | vsnprintf | ELSEQ | |
| | | EINVAL | |
| | | ENOMEM | |
| | | ENXIO | |
rmdir | rmdir | EEXIST | Removes a directory. |
| | | EINVAL | |
| | | ETIMEDOUT | |
| | | ESTALE | |
scandir
alphasort, | scandir
alphasor
versionsort | | Scans a directory for matching entries. |
readlink | readlink | ERANGE
ETIMEDOUT | Reads value of a symbolic link. |
remove | remove | EBUSY
ETIMEDOUT
ESTALE
EEXIST
EINVAL | Deletes a name and possibly the file it refers to. |
symlink | symlink | EDQUOT
ETIMEDOUT
ESTALE | Makes a new name for a a file. |
unlink | unlink | EBUSY
ETIMEDOUT
ESTALE | Deletes a name an possibly the file it refers to. |
fscntl | None | | Manipulates filesystem control operations. |
getfsent_r
getfsspec_r
getfsfile_r
getfstype_r
setfsent_r
endfsent_r | getfsent
getfsspec
getfsfile
setfsent
endfsent | | Gets information about a filesystem. In AIX, _r denotes REENTRANT, which means functions are threadsafe. In Linux, you must make your modules that are using the equivalent APIs thread safe. |
getvfsent | None | | Gets a (virtual file system) VFS file entry. |
getvfsbytype | | | |
getvfsbyname | | | |
getvfsbyflag | | | |
setvfsent | | | |
endvfsent | | | |
mnctl | None | | Returns mount status information. |
quotacl | quotacl | ELOOP | Manipulates disk quotas. |
| | | ENAMETOOLONG | |
| | | ENOENT | |
| | | EOPNOTSUPP | |
| | | EROFS | |
| | | EUSERS | |
statfs | statfs | ESTALE | Gets filesystem statistics. |
fstatfs | fstatfs | ETIMEDOUT | |
| | | EIO | |
sysconf | sysconf | | Provides a way for the application to determine values for system limits or options at runtime. Functions are compatible, but the information they return are specific to the platform they are running on. |
sync | sync | | Functions are not compatible. In Linux, sync returns an int; in AIX, this function returns void. Causes all information in memory that should be on disk to be written out. The information returned and its format differ. |
umask | umask | | Sets the umask to mask and 0777. |
vmount
uvmount | None | | AIX-specific. Creates what is known as a virtual file system (VFS). uvmount removes a VFS. umount can also be used as an alternative to uvmount. |
umount | umount | In AIX, ENOBLK is returned. In Linux, ENOTBLK is returned. | Unmounts a previously mounted filesystem, directory, or file. |
