config/git: import suckless sbase

i currently use the output of sha512sum in several
places of xbmk, which is a bit unreliable in case
output changes.

other cases where i use util outputs in variables
are probably reliable, because i'm using mostly
posix utilities in those.

to mitigate this, i now import suckless sbase, which
has a reasonable sha512sum implementation.

*every* binary it builds is being placed in build.list,
because i'll probably start using more of them.

for example, i may start modifying the "date"
implementation, adding the GNU-specific options that
i need as mentioned on init.sh

i'm importing it in util/ because the sha512sum
util is needed for verifying project sources, so
if sbase itself is a "project source", that means
we can into a chicken and egg bootstrapping problem.

this is sbase at revision:
055cc1ae1b3a13c3d8f25af0a4a3316590efcd48

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/sbase/logger.c

@@ -0,0 +1,91 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#define SYSLOG_NAMES
+#include <syslog.h>
+#include <unistd.h>
+
+#include "util.h"
+
+static int
+decodetable(CODE *table, char *name)
+{
+	CODE *c;
+
+	for (c = table; c->c_name; c++)
+		if (!strcasecmp(name, c->c_name))
+			return c->c_val;
+	eprintf("invalid priority name: %s\n", name);
+
+	return -1; /* not reached */
+}
+
+static int
+decodepri(char *pri)
+{
+	char *lev, *fac = pri;
+
+	if (!(lev = strchr(pri, '.')))
+		eprintf("invalid priority name: %s\n", pri);
+	*lev++ = '\0';
+	if (!*lev)
+		eprintf("invalid priority name: %s\n", pri);
+
+	return (decodetable(facilitynames, fac) & LOG_FACMASK) |
+	       (decodetable(prioritynames, lev) & LOG_PRIMASK);
+}
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-is] [-p priority] [-t tag] [message ...]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	size_t sz;
+	int logflags = 0, priority = LOG_NOTICE, i;
+	char *buf = NULL, *tag = NULL;
+
+	ARGBEGIN {
+	case 'i':
+		logflags |= LOG_PID;
+		break;
+	case 'p':
+		priority = decodepri(EARGF(usage()));
+		break;
+	case 's':
+		logflags |= LOG_PERROR;
+		break;
+	case 't':
+		tag = EARGF(usage());
+		break;
+	default:
+		usage();
+	} ARGEND
+
+	openlog(tag ? tag : getlogin(), logflags, 0);
+
+	if (!argc) {
+		while (getline(&buf, &sz, stdin) > 0)
+			syslog(priority, "%s", buf);
+	} else {
+		for (i = 0, sz = 0; i < argc; i++)
+			sz += strlen(argv[i]);
+		sz += argc;
+		buf = ecalloc(1, sz);
+		for (i = 0; i < argc; i++) {
+			estrlcat(buf, argv[i], sz);
+			if (i + 1 < argc)
+				estrlcat(buf, " ", sz);
+		}
+		syslog(priority, "%s", buf);
+	}
+
+	closelog();
+
+	return fshut(stdin, "<stdin>");
+}