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, 108 insertions, 0 deletions

diff --git a/util/sbase/getconf.c b/util/sbase/getconf.c
new file mode 100644
index 00000000..ca3e186f
--- /dev/null
+++ b/util/sbase/getconf.c
@@ -0,0 +1,108 @@
+/* See LICENSE file for copyright and license details. */
+#include <errno.h>
+#include <unistd.h>
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "util.h"
+
+struct var {
+	const char *k;
+	long v;
+};
+
+#include "getconf.h"
+
+void
+usage(void)
+{
+	eprintf("usage: %s [-v spec] var [path]\n", argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	size_t len;
+	long res;
+	int i;
+	char *str;
+
+	ARGBEGIN {
+	case 'v':
+		/* ignore */
+		EARGF(usage());
+		break;
+	default:
+		usage();
+		break;
+	} ARGEND
+
+	if (argc == 1) {
+		/* sysconf */
+		for (i = 0; i < LEN(sysconf_l); i++) {
+			if (strcmp(argv[0], sysconf_l[i].k))
+				continue;
+			errno = 0;
+			if ((res = sysconf(sysconf_l[i].v)) < 0) {
+				if (errno)
+					eprintf("sysconf %ld:", sysconf_l[i].v);
+				puts("undefined");
+			} else {
+				printf("%ld\n", res);
+			}
+			return fshut(stdout, "<stdout>");
+		}
+		/* confstr */
+		for (i = 0; i < LEN(confstr_l); i++) {
+			if (strcmp(argv[0], confstr_l[i].k))
+				continue;
+			errno = 0;
+			if (!(len = confstr(confstr_l[i].v, NULL, 0))) {
+				if (errno)
+					eprintf("confstr %ld:", confstr_l[i].v);
+				puts("undefined");
+			} else {
+				str = emalloc(len);
+				errno = 0;
+				if (!confstr(confstr_l[i].v, str, len)) {
+					if (errno)
+						eprintf("confstr %ld:", confstr_l[i].v);
+					puts("undefined");
+				} else {
+					puts(str);
+				}
+				free(str);
+			}
+			return fshut(stdout, "<stdout>");
+		}
+		/* limits */
+		for (i = 0; i < LEN(limits_l); i++) {
+			if (strcmp(argv[0], limits_l[i].k))
+				continue;
+			printf("%ld\n", limits_l[i].v);
+			return fshut(stdout, "<stdout>");
+		}
+	} else if (argc == 2) {
+		/* pathconf */
+		for (i = 0; i < LEN(pathconf_l); i++) {
+			if (strcmp(argv[0], pathconf_l[i].k))
+				continue;
+			errno = 0;
+			if ((res = pathconf(argv[1], pathconf_l[i].v)) < 0) {
+				if (errno)
+					eprintf("pathconf %ld:", pathconf_l[i].v);
+				puts("undefined");
+			} else {
+				printf("%ld\n", res);
+			}
+			return fshut(stdout, "<stdout>");
+		}
+	} else {
+		usage();
+	}
+
+	eprintf("invalid variable: %s\n", argv[0]);
+
+	return 0;
+}