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Utilities & Libraries
C Library Reference
I
iofdinfo()
Retrieve server attributes

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        Retrieve server attributes
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        Verify that the client has a given resource manager ability
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        Handle an _IO_ACL message
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        Default handler for the acl callout
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        Initialize the per-name attribute structure associated with a device
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        Lock the attribute structure
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        I/O attribute structure
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        Try to lock the attribute structure
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        Unlock the attribute structure
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        Check access permissions
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        Handle an _IO_CHMOD message
      - iofunc_chmod_default()
        Default handler for _IO_CHMOD messages
      - iofunc_chown()
        Handle an _IO_CHOWN message
      - iofunc_chown_default()
        Default handler for _IO_CHOWN messages
      - iofunc_client_info_able()
        Return information about a client connection, including abilities
      - iofunc_client_info_ext()
        Return information about a client connection
      - iofunc_client_info_ext_free()
        Free the structure used for information about a client connection
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        Free all locks allocated for the client process
      - iofunc_close_dup_default()
        Default handler for _IO_CLOSE messages
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        Return the memory allocated for an OCB
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        Return the memory allocated for an OCB
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        Handle an _IO_DEVCTL message
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        Default handler for _IO_DEVCTL messages
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        Perform validation that's common to all handlers for _IO_DEVCTL messages
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        Handle an _IO_FDINFO message
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        Default handler for _IO_FDINFO messages
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        Initialize the default POSIX-layer function tables
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        Link two directory entries
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        Lock a resource
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        Default handler for _IO_LOCK messages
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        Default handler for the lock_ocb callout
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        Handle an _IO_LSEEK message
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        Default handler for _IO_LSEEK messages
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        Verify a client's ability to make a new filesystem entry point
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        Handle an _IO_MMAP message
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        Default handler for _IO_MMAP messages
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        Handle an _IO_MMAP message
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        Clean up the IOFUNC_MOUNT_T structure
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        Install, poll, or remove a notification handler
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        Initialize an Open Control Block
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        Allocate an iofunc Open Control Block
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        Release Open Control Block resources
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        Deallocate an iofunc Open Control Block's memory
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        Open Control Block structure
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        Verify a client's ability to open or to create a resource
      - iofunc_open_default(), iofunc_open_default_cinfo()
        Default handler for _IO_CONNECT messages
      - iofunc_openfd()
        Increment count and locking flags
      - iofunc_openfd_default()
        Default handler for _IO_OPENFD messages
      - iofunc_pathconf()
        Support pathconf() requests
      - iofunc_pathconf_default()
        Default handler for _IO_PATHCONF messages
      - iofunc_read_default()
        Default handler for _IO_READ messages
      - iofunc_read_verify()
        Verify a client's read access to a resource
      - iofunc_readlink()
        Verify the attributes being used to read a link
      - iofunc_rename()
        Do permission checks for a _IO_CONNECT_RENAME message
      - iofunc_space_verify()
        Do permission checks for the _IO_SPACE message
      - iofunc_stat(), iofunc_stat_format()
        Populate a stat structure
      - iofunc_stat_default()
        Default handler for _IO_STAT messages
      - iofunc_sync()
        Indicate if synchronization is needed
      - iofunc_sync_default()
        Default handler for _IO_SYNC messages
      - iofunc_sync_verify()
        Verify permissions to sync
      - iofunc_time_update()
        Update time stamps
      - iofunc_unblock()
        Unblock OCBs
      - iofunc_unblock_default()
        Default unblock handler
      - iofunc_unlink()
        Verify that an entry can be unlinked
      - iofunc_unlock_ocb_default()
        Default handler for the unlock_ocb callout
      - iofunc_utime()
        Update time stamps
      - iofunc_utime_default()
        Default handler for _IO_UTIME messages
      - iofunc_write_default()
        Default handler for _IO_WRITE messages
      - iofunc_write_verify()
        Verify a client's write access to a resource
      - ionotify()
        Arm a resource manager
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        Test a character to see if it's alphanumeric
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        Test a character to see if it's alphabetic
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        Test a character to see if it's a 7-bit ASCII character
      - isatty()
        Test to see if a file descriptor is associated with a terminal
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        Test a character to see if it's a blank character
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        Test a character to see if it's a control character
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        Test a character to see if it's a decimal digit
      - isfdtype()
        Determine whether a file descriptor refers to a socket
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        Determine if a number is finite
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        Test a character to see if it's any printable character except a space
      - isgreater()
        Determine whether one floating-point number is greater than another
      - isgreaterequal()
        Determine whether one floating-point number is greater than or equal to another
      - isinf()
        Test for infinity
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        Determine whether one floating-point number is less than another
      - islessequal()
        Determine whether one floating-point number is less than or equal to another
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        Determine whether one floating-point number is less than or greater than another
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        Test a character to see if it's a lowercase letter
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        Test for not-a-number (NaN)
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        Determine whether a floating-point number is normal
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        Test a character to see if it's any printable character, including a space
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        Test a character to see if it's any punctuation character
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        Test a character to see if it's a whitespace character
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        Determine whether two floating-point numbers are unordered
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        Test a character to see if it's an uppercase letter
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        Test a wide character to see if it's alphanumeric
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        Test a wide character to see if it's alphabetic
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        Test a wide character to see if it's a blank character
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        Test a wide character to see if it's a control character
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        Test a wide character to see if it's a decimal digit
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        Test a wide character to see if it's any printable character except space
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        Test a wide character to see if it's a lowercase letter
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        Test a wide character to see if it's a hexadecimal digit
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        Test a character to see if it's a hexadecimal digit
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iofdinfo()

QNX SDP8.0C Library ReferenceAPIDeveloper

Retrieve server attributes

Synopsis:

#include <sys/iomgr.h>

int iofdinfo( int filedes,
              unsigned flags, 
              struct _fdinfo * info, 
              char * path, 
              int maxlen );

Arguments:

filedes: A file descriptor for the connection that you want to query.
flags: Currently, no flags are supported. Pass in 0 for this field.
info: NULL, or a pointer to an _fdinfo structure that contains the connection information defined in <sys/iomgr.h>. Specify NULL if it's not required.
path: A pointer to a buffer where the function can store the path associated with the file descriptor. The pathname is always null-terminated. You can specify NULL if it's not required.
maxlen: The length of the buffer pointed to by path. If the given length is too small to hold the entire pathname, the pathname is truncated.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The iofdinfo() function retrieves the server's attribute information for the connection referred to by filedes.

Returns:

The size of the buffer needed to store the path, which is equal to the length of the filedes pathname plus one (for the null-terminator), or -1 if an error occurs (errno is set).

Errors:

EFAULT: A fault occurred in the server's address space when it tried to access the caller's message buffers.
EMSGSIZE: Insufficient space is available in the server's buffer for the _fdinfo data structure.

Classification:


Safety:
Cancellation point	No
Signal handler	Yes
Thread	Yes

Page updated: August 09, 2024