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, 111 insertions, 0 deletions

diff --git a/util/sbase/split.c b/util/sbase/split.c
new file mode 100644
index 00000000..7033a284
--- /dev/null
+++ b/util/sbase/split.c
@@ -0,0 +1,111 @@
+/* See LICENSE file for copyright and license details. */
+#include <ctype.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+static int base = 26, start = 'a';
+
+static int
+itostr(char *str, int x, int n)
+{
+	str[n] = '\0';
+	while (n-- > 0) {
+		str[n] = start + (x % base);
+		x /= base;
+	}
+
+	return x ? -1 : 0;
+}
+
+static FILE *
+nextfile(FILE *f, char *buf, int plen, int slen)
+{
+	static int filecount = 0;
+
+	if (f)
+		fshut(f, "<file>");
+	if (itostr(buf + plen, filecount++, slen) < 0)
+		return NULL;
+
+	if (!(f = fopen(buf, "w")))
+		eprintf("'%s':", buf);
+
+	return f;
+}
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-a num] [-b num[k|m|g] | -l num] [-d] "
+	        "[file [prefix]]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	FILE *in = stdin, *out = NULL;
+	off_t size = 1000, n;
+	int ret = 0, ch, plen, slen = 2, always = 0;
+	char name[NAME_MAX + 1], *prefix = "x", *file = NULL;
+
+	ARGBEGIN {
+	case 'a':
+		slen = estrtonum(EARGF(usage()), 0, INT_MAX);
+		break;
+	case 'b':
+		always = 1;
+		if ((size = parseoffset(EARGF(usage()))) < 0)
+			return 1;
+		if (!size)
+			eprintf("size needs to be positive\n");
+		break;
+	case 'd':
+		base = 10;
+		start = '0';
+		break;
+	case 'l':
+		always = 0;
+		size = estrtonum(EARGF(usage()), 1, MIN(LLONG_MAX, SSIZE_MAX));
+		break;
+	default:
+		usage();
+	} ARGEND
+
+	if (*argv)
+		file = *argv++;
+	if (*argv)
+		prefix = *argv++;
+	if (*argv)
+		usage();
+
+	plen = strlen(prefix);
+	if (plen + slen > NAME_MAX)
+		eprintf("names cannot exceed %d bytes\n", NAME_MAX);
+	estrlcpy(name, prefix, sizeof(name));
+
+	if (file && strcmp(file, "-")) {
+		if (!(in = fopen(file, "r")))
+			eprintf("fopen %s:", file);
+	}
+
+	n = 0;
+	while ((ch = getc(in)) != EOF) {
+		if (!out || n >= size) {
+			if (!(out = nextfile(out, name, plen, slen)))
+				eprintf("fopen: %s:", name);
+			n = 0;
+		}
+		n += (always || ch == '\n');
+		putc(ch, out);
+	}
+
+	ret |= (in != stdin) && fshut(in, "<infile>");
+	ret |= out && (out != stdout) && fshut(out, "<outfile>");
+	ret |= fshut(stdin, "<stdin>") | fshut(stdout, "<stdout>");
+
+	return ret;
+}