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NAME

tell - return a file offset for a file descriptor
 

SYNOPSIS

#include <unistd.h>

off_t tell(int fd);

DESCRIPTION

The tell() function obtains the current value of the file-position indicator for the file descriptor fd.  

RETURN VALUES

Upon successful completion, tell() returns the current value of the file-position indicator for fd measured in bytes from the beginning of the file.

Otherwise, it returns -1 and sets errno to indicate the error.  

ERRORS

The tell() function will fail if:

EBADF

The file descriptor fd is not an open file descriptor.

EOVERFLOW

The current file offset cannot be represented correctly in an object of type off_t.

ESPIPE

The file descriptor fd is associated with a pipe or FIFO.

USAGE

The tell() function is equivalent to lseek(fd, 0, SEEK_CUR).  

ATTRIBUTES

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

ATTRIBUTE TYPE ATTRIBUTE VALUE MT-Level MT-Safe

SEE ALSO

lseek(2), attributes(5)

Index

NAME

SYNOPSIS

DESCRIPTION

RETURN VALUES

ERRORS

USAGE

ATTRIBUTES

SEE ALSO

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