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, 131 insertions, 0 deletions

diff --git a/util/sbase/kill.c b/util/sbase/kill.c
new file mode 100644
index 00000000..b09f55cb
--- /dev/null
+++ b/util/sbase/kill.c
@@ -0,0 +1,131 @@
+/* See LICENSE file for copyright and license details. */
+#include <sys/wait.h>
+
+#include <ctype.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+
+#include "util.h"
+
+struct {
+	const char *name;
+	const int   sig;
+} sigs[] = {
+	{ "0", 0 },
+#define SIG(n) { #n, SIG##n }
+	SIG(ABRT), SIG(ALRM), SIG(BUS),  SIG(CHLD), SIG(CONT), SIG(FPE),  SIG(HUP),
+	SIG(ILL),  SIG(INT),  SIG(KILL), SIG(PIPE), SIG(QUIT), SIG(SEGV), SIG(STOP),
+	SIG(TERM), SIG(TRAP), SIG(TSTP), SIG(TTIN), SIG(TTOU), SIG(USR1), SIG(USR2),
+	SIG(URG),
+#undef SIG
+};
+
+const char *
+sig2name(const int sig)
+{
+	size_t i;
+
+	for (i = 0; i < LEN(sigs); i++)
+		if (sigs[i].sig == sig)
+			return sigs[i].name;
+	eprintf("%d: bad signal number\n", sig);
+
+	return NULL; /* not reached */
+}
+
+int
+name2sig(const char *name)
+{
+	size_t i;
+
+	for (i = 0; i < LEN(sigs); i++)
+		if (!strcasecmp(sigs[i].name, name))
+			return sigs[i].sig;
+	eprintf("%s: bad signal name\n", name);
+
+	return -1; /* not reached */
+}
+
+static void
+usage(void)
+{
+	eprintf("usage: %s [-s signame | -num | -signame] pid ...\n"
+	        "       %s -l [num]\n", argv0, argv0);
+}
+
+int
+main(int argc, char *argv[])
+{
+	pid_t pid;
+	size_t i;
+	int ret = 0, sig = SIGTERM;
+
+	argv0 = *argv, argv0 ? (argc--, argv++) : (void *)0;
+
+	if (!argc)
+		usage();
+
+	if ((*argv)[0] == '-') {
+		switch ((*argv)[1]) {
+		case 'l':
+			if ((*argv)[2])
+				goto longopt;
+			argc--, argv++;
+			if (!argc) {
+				for (i = 0; i < LEN(sigs); i++)
+					puts(sigs[i].name);
+			} else if (argc == 1) {
+				sig = estrtonum(*argv, 0, INT_MAX);
+				if (sig > 128)
+					sig = WTERMSIG(sig);
+				puts(sig2name(sig));
+			} else {
+				usage();
+			}
+			return fshut(stdout, "<stdout>");
+		case 's':
+			if ((*argv)[2])
+				goto longopt;
+			argc--, argv++;
+			if (!argc)
+				usage();
+			sig = name2sig(*argv);
+			argc--, argv++;
+			break;
+		case '-':
+			if ((*argv)[2])
+				goto longopt;
+			argc--, argv++;
+			break;
+		default:
+		longopt:
+			/* XSI-extensions -argnum and -argname*/
+			if (isdigit((*argv)[1])) {
+				sig = estrtonum((*argv) + 1, 0, INT_MAX);
+				sig2name(sig);
+			} else {
+				sig = name2sig((*argv) + 1);
+			}
+			argc--, argv++;
+		}
+	}
+
+	if (argc && !strcmp(*argv, "--"))
+		argc--, argv++;
+
+	if (!argc)
+		usage();
+
+	for (; *argv; argc--, argv++) {
+		pid = estrtonum(*argv, INT_MIN, INT_MAX);
+		if (kill(pid, sig) < 0) {
+			weprintf("kill %d:", pid);
+			ret = 1;
+		}
+	}
+
+	return ret;
+}