To comply with SUSv3, duplicate the variable contents for each given format,

so that multiple -ovar=header lines do not overwrite eachother.

This means that ps -ouser=USERNAME -ouser=WHO would now possibly print:
USERNAME WHO
juli     juli

Whereas before it would be:
WHO WHO
juli juli

1 files changed, 4 insertions, 1 deletions

diff --git a/bin/ps/keyword.c b/bin/ps/keyword.c
index 0e4241a..7c84691 100644
--- a/bin/ps/keyword.c
+++ b/bin/ps/keyword.c
@@ -246,7 +246,10 @@ parsefmt(const char *p)
 			continue;
 		if ((vent = malloc(sizeof(struct varent))) == NULL)
 			err(1, NULL);
-		vent->var = v;
+		vent->var = malloc(sizeof(*vent->var));
+		if (vent->var == NULL)
+			err(1, NULL);
+		memcpy(vent->var, v, sizeof(*vent->var));
 		vent->next = NULL;
 		if (vhead == NULL)
 			vhead = vtail = vent;