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/*
* 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"
/*
* 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 {
char buf[BUFSIZ];
ssize_t rd;
while ((rd = read(fd, buf, sizeof(buf))) > 0)
ignore_result( write(STDOUT_FILENO, buf, rd) );
close(fd);
return EXIT_FAILURE;
}
dflt:
if (fd >= 0)
close(fd);
fprintf(stdout, _("This account is currently not available.\n"));
return EXIT_FAILURE;
}
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