lscpu: add support for LSCPU_{CACHES_}COLUMNS environment variables

This provides alternate ways of specifying output columns similar
to the '--parse', '--extended' and '--caches' options.

Addresses: #2816
Signed-off-by: Christian Goeschel Ndjomouo <cgoesc2@wgu.edu>

diff --git a/sys-utils/lscpu.c b/sys-utils/lscpu.c
index 99799594e7e8810aaad6b033dbde4a2462597528..fe0eac9e7e9bffbbb6d53376593f50970ffbcaf4 100644 (file)
--- a/sys-utils/lscpu.c
+++ b/sys-utils/lscpu.c
@@ -1395,6 +1395,11 @@ int main(int argc, char *argv[])
        if (hierarchic == -1)
                hierarchic = isatty(STDOUT_FILENO);     /* default */
 
+       if (!outarg && (cxt->mode == LSCPU_OUTPUT_CACHES))
+               outarg = getenv("LSCPU_CACHES_COLUMNS");
+       if (!outarg && ((cxt->mode == LSCPU_OUTPUT_PARSABLE) || (cxt->mode == LSCPU_OUTPUT_READABLE)))
+               outarg = getenv("LSCPU_COLUMNS");
+
        switch(cxt->mode) {
        case LSCPU_OUTPUT_SUMMARY:
                print_summary(cxt);