GNU has a very useful third argument to match() but this is not supported in the POSIX awk. It is a great shame.
Update the code to cope.
Signed-off-by: Simon Glass sjg@chromium.org ---
scripts/env2string.awk | 23 +++++++++++++++-------- 1 file changed, 15 insertions(+), 8 deletions(-)
diff --git a/scripts/env2string.awk b/scripts/env2string.awk index 57d0fc8f3ba..4c109eee32a 100644 --- a/scripts/env2string.awk +++ b/scripts/env2string.awk @@ -24,26 +24,33 @@ NF { # Quote quotes gsub(""", "\"")
+ # Avoid using the non-POSIX third parameter to match() which is very + # inconvenient + has_var = match($0, "^([^ \t=][^ =]*)=(.*)$", arr) + # Is this the start of a new environment variable? - if (match($0, "^([^ \t=][^ =]*)=(.*)$", arr)) { + if (has_var) { if (length(env) != 0) { # Record the value of the variable now completed vars[var] = env } - var = arr[1] - env = arr[2] + + # Collect the variable name. The value follows the '=' + match($0, "^([^ \t=][^ =]*)=") + var = substr($0, 1, RLENGTH - 1) + env = substr($0, RLENGTH + 1)
# Deal with += which concatenates the new string to the existing - # variable - if (length(env) != 0 && match(var, "^(.*)[+]$", var_arr)) - { + # variable. Again we are careful to use POSIX match() + if (length(env) != 0 && match(var, "^(.*)[+]$")) { + plusname = substr(var, RSTART, RLENGTH - 1) # Allow var+=val to indicate that the variable name is # var+ and this is not actually a concatenation - if (substr(var_arr[1], length(var_arr[1])) == "\") { + if (substr(plusname, length(plusname)) == "\") { # Drop the backslash sub(/\[+]$/, "+", var) } else { - var = var_arr[1] + var = plusname env = vars[var] env } }