# Use the original STDIN STDOUT and STDERR when rear was launched by the user # to get input from the user and to show output to the user (cf. _input-output-functions.sh). ####################### BEGIN Progress Indicator # Call StartProgressSubsystem to get more detailed progress reports: if tty -s <&7 ; then # There is a tty on the original STDOUT. if test "plain" = "$PROGRESS_MODE" ; then # The 'plain' progress mode outputs the same content # as below but without ANSI escape sequences: function ProgressStart () { echo "${MESSAGE_PREFIX}$*" 1>&7 } function ProgressStop () { echo "${MESSAGE_PREFIX}OK" 1>&7 } function ProgressError () { echo "${MESSAGE_PREFIX}FAILED" 1>&7 } function ProgressInfo () { echo "${MESSAGE_PREFIX}$*" 1>&7 } else # If the 'plain' progress mode is not explicitly requested # (default/fallback behaviour when there is a tty on stdout) # do progress animated display via ANSI escape sequences, # see http://ascii-table.com/ansi-escape-sequences-vt-100.php # for the ANSI escape sequences as they appear below: # Esc[2K : Clear entire line # Esc7 : Save cursor position and attributes # Esc8 : Restore cursor position and attributes # Esc[K : Clear line from cursor right function ProgressStart () { echo -en "\e[2K\r${MESSAGE_PREFIX}$*\e7" 1>&7 } function ProgressStop () { echo -e "\e8\e[K${MESSAGE_PREFIX}OK" 1>&7 } function ProgressError () { echo -e "\e8\e[K${MESSAGE_PREFIX}FAILED" 1>&7 } function ProgressInfo () { echo -en "\e[2K\r${MESSAGE_PREFIX}$*\e7" 1>&7 } fi else # No tty on the original STDOUT, disable progress animated display altogether. # The main difference to the 'plain' progress mode above is that # there is no ProgressInfo when there is no tty the original STDOUT: function ProgressStart () { echo -n "${MESSAGE_PREFIX}$*" 1>&7 } function ProgressStop () { echo -e "${MESSAGE_PREFIX}OK" 1>&7 } function ProgressError () { echo -e "${MESSAGE_PREFIX}FAILED" 1>&7 } fi ####################### END Progress Indicator