Many files:

Many files:
  unix.c: Add support for calculating a progress bar if the -C0 option
  	is given.  The function e2fsck_clear_progbar() clears the progress bar
  	and must be called before any message is issued.  SIGUSR1 will enable
  	the progress bar, and SIGUSR2 will disable the progress bar.  This is
  	used by fsck to handle parallel filesystem checks.  Also, set the
  	device_name from the filesystem label if it is available.
  e2fsck.h: Add new flags E2F_FLAG_PROG_BAR and E2F_FLAG_PROG_SUPRESS.
  	Add new field in the e2fsck structure which contains the last tenth of
  	a percent printed for the user.
  message.c (print_e2fsck_message): Add call to e2fsck_clear_progbar().
  pass1.c (e2fsck_pass1):
  pass2.c (e2fsck_pass2):
  pass3.c (e2fsck_pass3):
  pass4.c (e2fsck_pass4):
  pass5.c (e2fsck_pass5): Add call to e2fsck_clear_progbar when printing
  	the resource tracking information.
  pass5.c (check_block_bitmaps, check_inode_bitmaps): If there is an
  	error in the bitmaps, suppress printing the progress bar using the
  	suppression flag for the remainder of the check, in order to clean up
  	the display.