ps: use %hs instead of %s format specifiers

Use %hs (locale-based encoding) instead of %s (UTF-8) format for
strings that are expected to be in current locale encoding (date/time,
process names/argument list).

PR:		241491
Reviewed by:	phil
Differential Revision:	https://reviews.freebsd.org/D22160

bin/ps/keyword.c

@@ -254,7 +254,7 @@ showkey(void)
 			i = len;
 			sep = "\n";
 		}
-		xo_emit("{P:/%s}{l:key/%s}", sep, p);
+		xo_emit("{P:/%hs}{l:key/%hs}", sep, p);
 		sep = " ";
 	}
 	xo_emit("\n");

bin/ps/print.c

@@ -89,11 +89,11 @@ printheader(void)
 		v = vent->var;
 		if (v->flag & LJUST) {
 			if (STAILQ_NEXT(vent, next_ve) == NULL)	/* last one */
-				xo_emit("{T:/%s}", vent->header);
+				xo_emit("{T:/%hs}", vent->header);
 			else
-				xo_emit("{T:/%-*s}", v->width, vent->header);
+				xo_emit("{T:/%-*hs}", v->width, vent->header);
 		} else
-			xo_emit("{T:/%*s}", v->width, vent->header);
+			xo_emit("{T:/%*hs}", v->width, vent->header);
 		if (STAILQ_NEXT(vent, next_ve) != NULL)
 			xo_emit("{P: }");
 	}

bin/ps/ps.c

@@ -192,6 +192,7 @@ main(int argc, char *argv[])
 	char fmtbuf[_POSIX2_LINE_MAX];
 
 	(void) setlocale(LC_ALL, "");
+	xo_no_setlocale();
 	time(&now);			/* Used by routines in print.c. */
 
 	/*
@@ -696,7 +697,7 @@ main(int argc, char *argv[])
 			fwidthmin = (xo_get_style(NULL) != XO_STYLE_TEXT ||
 			    (STAILQ_NEXT(vent, next_ve) == NULL &&
 			    (vent->var->flag & LJUST))) ? 0 : vent->var->width;
-			snprintf(fmtbuf, sizeof(fmtbuf), "{:%s/%%%s%d..%ds}",
+			snprintf(fmtbuf, sizeof(fmtbuf), "{:%s/%%%s%d..%dhs}",
 			    vent->var->field ? vent->var->field : vent->var->name,
 			    (vent->var->flag & LJUST) ? "-" : "",
 			    fwidthmin, fwidthmax);