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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Standard C Library Functions

getcwd(3C)

DESCRIPTION
RETURN VALUES
ERRORS
USAGE
EXAMPLES
ATTRIBUTES
SEE ALSO

NAME

getcwd - get pathname of current working directory

SYNOPSIS

#include <unistd.h> char *getcwd(char *buf, size_t size);

The getcwd() function places an absolute pathname of the current working directory in the array pointed to by buf, and returns buf. 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 argument 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.

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 unexpected results.

EXAMPLES

Example 1. 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\n", cwd);
    return(0);
}

ATTRIBUTES

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

ATTRIBUTE TYPE	ATTRIBUTE VALUE
MT-Level	MT-Safe