getcwd(3C)						   Standard C Library Functions 						getcwd(3C)

NAME

       getcwd - get pathname of current working directory

SYNOPSIS

       #include <unistd.h>

       char *getcwd(char *buf, size_t size);

DESCRIPTION

       The  getcwd()  function	places	an absolute pathname of the current working directory in the array pointed to by buf, and returns buf. The
       pathname copied to the array contains no components that are symbolic links. The size argument is the size in bytes of the character  array
       pointed to by buf and must be at least one greater than the length of the pathname to be returned.

       If buf is not a null pointer, the pathname is stored in the space pointed to by buf.

       If  buf is a null pointer, getcwd() obtains size bytes of space using malloc(3C). The pointer returned by getcwd() can be used as the argu-
       ment in a subsequent call to free().

RETURN VALUES

       Upon successful completion, getcwd() returns the buf argument. Otherwise, the function returns a null pointer and sets  errno  to  indicate
       the error.

ERRORS

       The getcwd() function will fail if:

       EINVAL	       The size argument is equal to 0.

       ERANGE	       The size argument is greater than 0 and less than the length of the pathname plus 1.

       The getcwd() function may fail if:

       EACCES	       A parent directory cannot be read to get its name.

       ENOMEM	       Insufficient storage space is available.

EXAMPLES

       Example 1: Determine the absolute pathname of the current working directory.

       The  following  example	returns  a  pointer  to an array that holds the absolute pathname of the current working directory. The pointer is
       returned in the ptr variable, which points to the buf array where the pathname is stored.

       #include <stdlib.h>
       #include <unistd.h>
       ...
       long size;
       char *buf;
       char *ptr;
       size = pathconf(".", _PC_PATH_MAX);
       if ((buf = (char *)malloc((size_t)size)) != NULL)
	      ptr = getcwd(buf, (size_t)size);
       ...

USAGE

       Applications should exercise care when using chdir(2) in conjunction with getcwd(). The current working directory is global to all  threads
       within  a process. If more than one thread calls chdir() to change the working directory, a subsequent call to getcwd() could produce unex-
       pected results.

EXAMPLES

       Example 2: Printing the current working directory

       The following example prints the current working directory.

       #include <unistd.h>
       #include <stdio.h>

       main()
       {
	   char *cwd;
	   if ((cwd = getcwd(NULL, 64)) == NULL) {
	       perror("pwd");
	       exit(2);
	   }
	   (void)printf("%s
", cwd);
	   free(cwd); /* free memory allocated by getcwd() */
	   return(0);
       }

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       chdir(2), malloc(3C), attributes(5), standards(5)

SunOS 5.10							    18 Oct 2004 							getcwd(3C)