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>

1 files changed, 82 insertions, 0 deletions

diff --git a/util/sbase/cmp.c b/util/sbase/cmp.c
new file mode 100644
index 00000000..83ab149e
--- /dev/null
+++ b/util/sbase/cmp.c
@@ -0,0 +1,82 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+static void
+usage(void)
+{
+	enprintf(2, "usage: %s [-l | -s] file1 file2\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	FILE *fp[2];
+	size_t line = 1, n;
+	int ret = 0, lflag = 0, sflag = 0, same = 1, b[2];
+
+	ARGBEGIN {
+	case 'l':
+		lflag = 1;
+		break;
+	case 's':
+		sflag = 1;
+		break;
+	default:
+		usage();
+	} ARGEND
+
+	if (argc != 2 || (lflag && sflag))
+		usage();
+
+	for (n = 0; n < 2; n++) {
+		if (!strcmp(argv[n], "-")) {
+			argv[n] = "<stdin>";
+			fp[n] = stdin;
+		} else {
+			if (!(fp[n] = fopen(argv[n], "r"))) {
+				if (!sflag)
+					weprintf("fopen %s:", argv[n]);
+				return 2;
+			}
+		}
+	}
+
+	for (n = 1; ; n++) {
+		b[0] = getc(fp[0]);
+		b[1] = getc(fp[1]);
+
+		if (b[0] == b[1]) {
+			if (b[0] == EOF)
+				break;
+			else if (b[0] == '\n')
+				line++;
+			continue;
+		} else if (b[0] == EOF || b[1] == EOF) {
+			if (!sflag)
+				weprintf("EOF on %s\n", argv[(b[0] != EOF)]);
+			same = 0;
+			break;
+		} else if (!lflag) {
+			if (!sflag)
+				printf("%s %s differ: byte %zu, line %zu\n",
+				       argv[0], argv[1], n, line);
+			same = 0;
+			break;
+		} else {
+			printf("%zu %o %o\n", n, b[0], b[1]);
+			same = 0;
+		}
+	}
+
+	if (!ret)
+		ret = !same;
+	if (fshut(fp[0], argv[0]) | (fp[0] != fp[1] && fshut(fp[1], argv[1])) |
+	    fshut(stdout, "<stdout>"))
+		ret = 2;
+
+	return ret;
+}