--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libpwon/readconf.c	Sun Feb 02 17:40:25 2020 +0000
@@ -0,0 +1,63 @@
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+
+static char conf_file_pathname[] = "/opt/freecalypso/bootctrl.conf";
+
+#define	MAX_BOOTCTRL_CONF_LINE	510
+
+char bootctrl_pwon_cmd[MAX_BOOTCTRL_CONF_LINE+1];
+
+find_bootctrl_entry(soughtname)
+	char *soughtname;
+{
+	FILE *inf;
+	char linebuf[MAX_BOOTCTRL_CONF_LINE+2];
+	int lineno;
+	char *cp, *np;
+
+	inf = fopen(conf_file_pathname, "r");
+	if (!inf) {
+		perror(conf_file_pathname);
+		return(-1);
+	}
+	for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++) {
+		cp = index(linebuf, '\n');
+		if (!cp) {
+			fprintf(stderr,
+				"%s line %d: too long or missing newline\n",
+				conf_file_pathname, lineno);
+			fclose(inf);
+			return(-1);
+		}
+		*cp = '\0';
+		for (cp = linebuf; isspace(*cp); cp++)
+			;
+		if (*cp == '\0' || *cp == '#')
+			continue;
+		for (np = cp; *cp && !isspace(*cp); cp++)
+			;
+		if (!*cp) {
+invalid_syntax:		fprintf(stderr, "%s line %d: invalid syntax\n",
+				conf_file_pathname, lineno);
+			fclose(inf);
+			return(-1);
+		}
+		*cp++ = '\0';
+		while (isspace(*cp))
+			cp++;
+		if (*cp == '\0' || *cp == '#')
+			goto invalid_syntax;
+		if (!strcmp(np, soughtname)) {
+			strcpy(bootctrl_pwon_cmd, cp);
+			fclose(inf);
+			return(0);
+		}
+	}
+	fclose(inf);
+	fprintf(stderr, "error: no \"%s\" entry found in %s\n", soughtname,
+		conf_file_pathname);
+	return(-1);
+}