1 files changed, 111 insertions, 0 deletions
diff --git a/login-utils/nologin.c b/login-utils/nologin.c
new file mode 100644
index 0000000..ecbd0d2
--- /dev/null
+++ b/login-utils/nologin.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2013 Karel Zak <kzak@redhat.com>
+ */
+
+#include <stdio.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <getopt.h>
+
+#include "c.h"
+#include "nls.h"
+#include "pathnames.h"
+#include "fileutils.h"
+
+/*
+ * Always return EXIT_FAILURE (1), don't try to be smart!
+ */
+
+static void __attribute__((__noreturn__)) usage(void)
+{
+	FILE *out = stdout;
+	fputs(USAGE_HEADER, out);
+	fprintf(out,
+		_(" %s [options]\n"), program_invocation_short_name);
+
+	fputs(USAGE_SEPARATOR, out);
+	fputs(_("Politely refuse a login.\n"), out);
+
+	fputs(USAGE_OPTIONS, out);
+	fputs(_(" -c, --command <command>  does nothing (for compatibility with su -c)\n"), out);
+	printf(USAGE_HELP_OPTIONS(26));
+
+	printf(USAGE_MAN_TAIL("nologin(8)"));
+	exit(EXIT_FAILURE);
+}
+
+int main(int argc, char *argv[])
+{
+	int c, fd = -1;
+	struct stat st;
+	enum {
+		OPT_INIT_FILE = CHAR_MAX + 1,
+		OPT_NOPROFILE,
+		OPT_NORC,
+		OPT_POSIX,
+		OPT_RCFILE
+	};
+	static const struct option longopts[] = {
+		{ "command",     required_argument, NULL, 'c'           },
+		{ "init-file",   required_argument, NULL, OPT_INIT_FILE },
+		{ "interactive", no_argument,       NULL, 'i'           },
+		{ "login",       no_argument,       NULL, 'l'           },
+		{ "noprofile",   no_argument,       NULL, OPT_NOPROFILE },
+		{ "norc",        no_argument,       NULL, OPT_NORC      },
+		{ "posix",       no_argument,       NULL, OPT_POSIX     },
+		{ "rcfile",      required_argument, NULL, OPT_RCFILE    },
+		{ "restricted",  no_argument,       NULL, 'r'           },
+		{ "help",        no_argument,       NULL, 'h'           },
+		{ "version",     no_argument,       NULL, 'V'           },
+		{ NULL, 0, NULL, 0 }
+	};
+
+	setlocale(LC_ALL, "");
+	bindtextdomain(PACKAGE, LOCALEDIR);
+	textdomain(PACKAGE);
+
+	while ((c = getopt_long(argc, argv, "c:ilrhV", longopts, NULL)) != -1) {
+		switch (c) {
+		case 'c':
+		case OPT_INIT_FILE:
+		case 'i':
+		case 'l':
+		case OPT_NOPROFILE:
+		case OPT_NORC:
+		case OPT_POSIX:
+		case OPT_RCFILE:
+		case 'r':
+			/* Ignore well known shell command-line options */
+			break;
+		case 'h':
+			usage();
+		case 'V':
+			print_version(EXIT_FAILURE);	/* yes FAILURE! */
+		default:
+			errtryhelp(EXIT_FAILURE);
+		}
+	}
+
+	fd = open(_PATH_NOLOGIN_TXT, O_RDONLY);
+	if (fd < 0)
+		goto dflt;
+
+	c = fstat(fd, &st);
+	if (c < 0 || !S_ISREG(st.st_mode))
+		goto dflt;
+	else {
+		ul_copy_file(fd, STDOUT_FILENO);
+		close(fd);
+		return EXIT_FAILURE;
+	}
+
+dflt:
+	if (fd >= 0)
+		close(fd);
+	fprintf(stdout, _("This account is currently not available.\n"));
+	return EXIT_FAILURE;
+}