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. |