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scripts/showSamples.sh
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Sun May 20 13:48:26 2007 +0000 (2007-05-20)
changeset 112 ea15433daba0
child 124 851120479fb9
permissions -rwxr-xr-x
Ah! I finally have a progress bar that doesn't stall the build!
- pipe size in Linux is only 8*512=4096 bytes
- pipe size is not setable
- when the feeding process spits out data faster than the eating
process can read it, then the feeding process stalls after 4KiB
of data sent to the pipe
- for us, the progress bar would spawn a sub-shell every line,
and the sub-shell would in turn spawn a 'date' command.
Which was sloooww as hell, and would cause some kind of a
starvation: the pipe was full most of the time, and the
feeding process was stalled all this time.

Now, we use internal variables and a little hack based onan offset
to determine the elapsed time. Much faster this way, but still
CPU-intensive. 
     1 #!/bin/bash

     2 

     3 # Parses all samples on the command line, and for each of them, prints

     4 # the versions of the main tools

     5 

     6 # GREP_OPTIONS screws things up.

     7 export GREP_OPTIONS=

     8 

     9 # Dump a single sample

    10 dump_single_sample() {

    11     local width="$1"

    12     local sample="$2"

    13     . "${CT_TOP_DIR}/samples/${sample}/crosstool.config"

    14     # Build the components string

    15     local str="${CT_KERNEL}-${CT_KERNEL_VERSION}"

    16     str="${str} binutils-${CT_BINUTILS_VERSION}"

    17     str="${str} ${CT_CC}-${CT_CC_VERSION}"

    18     str="${str} ${CT_LIBC}-${CT_LIBC_VERSION}"

    19     printf "  %-*s - %s\n" ${width} "${sample}" "${str}"

    20 }

    21 

    22 # Get largest sample width

    23 width=0

    24 for sample in "${@}"; do

    25     [ ${#sample} -gt ${width} ] && width=${#sample}

    26 done

    27 

    28 for sample in "${@}"; do

    29     ( dump_single_sample ${width} "${sample}" )

    30 done
crosstool-ng