_NAME_
readFromFile

_PROTOTYPE_
int readFromFile(int fd, char *buffer, int bytesToRead);

_SHORT-DESCRIPTION_
Read from a file

_DESCRIPTION_
readFromFile is a low level routine used internally in the CRIS/SIS
routines. Primarily it just adds a little error checking to the usual read
calls. If the routine does not read the expected number of bytes into
the buffer, it will exit. 

_SHORT-CODE-SAMPLE_
int bytesToRead = 1024;
char buffer[1024];
int fileDescriptor;
char *path = "/home/idunn/rgr/data/sis/1997.09/1997.09.24/sis.1997.09.24.hsk";
_
fileDescriptor = openOrCreateFileToReadWrite(path);
readFromFile(fileDescriptor, buffer, bytesToRead);
close(fileDescriptor);

_INPUT_
* fd is the file descriptor for the already opened file.
* buffer is the user allocated buffer to read into from the file.
* bytesToRead is the number of bytes to read from file (cannot be
larger than the buffer size.)

_OUTPUT_
* buffer is written to and 1 is returned.
* If readFromFile is unsuccessful, the program terminates.