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selftests/ftrace: Handle the absence of tput

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In environments where tput is not available, we get the following
error
$ ./ftracetest: 163: [: Illegal number:
because ncolors is an empty string. Fix that by setting it to 0 if the
tput command fails.

Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Juerg Haefliger <juergh@canonical.com>
Signed-off-by: Shuah Khan <shuah@kernel.org>
This commit is contained in:
Juerg Haefliger 2019-02-25 14:14:50 +01:00 committed by Shuah Khan
parent 4ce55a9ce1
commit 0e27ded115
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/ftrace/ftracetest
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@ -154,13 +154,13 @@ fi
# Define text colors
# Check available colors on the terminal, if any
ncolors=`tput colors 2>/dev/null`
ncolors=`tput colors 2>/dev/null || echo 0`
color_reset=
color_red=
color_green=
color_blue=
# If stdout exists and number of colors is eight or more, use them
if [ -t 1 -a "$ncolors" -a "$ncolors" -ge 8 ]; then
if [ -t 1 -a "$ncolors" -ge 8 ]; then
color_reset="\033[0m"
color_red="\033[31m"
color_green="\033[32m"