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Alphabetical listing for C

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cuserid(3)
NAME
  cuserid - Get the alphanumeric username associated with the current process

SYNOPSIS
  #include <stdio.h>

  char *cuserid(
	  char *s );

LIBRARY
  Standard C Library (libc)

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  cuserid():  XPG4, XPG4-UNIX

  Refer to the standards(5) reference page for more information about
  industry standards and associated tags.

PARAMETERS
  s   Points to the character array into which the cuserid() function copies
      the string representing the username. This array must contain at least
      L_cuserid bytes.	L_cuserid is a constant defined in the stdio.h header
      file, and has a value greater than 0 (zero). If you specify a null
      pointer for s, the character string is stored into an internal thread-
      specific buffer, the address of which is returned.

DESCRIPTION
  The cuserid() function generates a character string representing the real
  or effective username of the owner of the current process.

NOTES
  If the s parameter is a null pointer, the character string is stored into
  an internal thread-specific buffer, the address of which is returned.
  Subsequent calls to the cuserid() function from the same thread overwrite
  the contents of the internal buffer.

  The cuserid() function is scheduled to be withdrawn from a future version
  of the X/Open CAE Specification.

RETURN VALUES
  If the s parameter is not a null pointer, the cuserid() function returns
  the character string in the array pointed to by s. If the username cannot
  be found, an empty string is returned.

  If the s parameter is a null pointer, the character string is stored into
  an internal thread-specific buffer, the address of which is returned. If
  the username cannot be found, a null pointer is returned.

SEE ALSO
  Functions: getlogin(2), getpwent(3)

  Standards: standards(5)

Index for Section 3

Alphabetical listing for C

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