int tune2fs_main(int argc UNUSED_PARAM, char **argv)
{
unsigned opts;
const char *label, *str_c, *str_i, *str_C;
struct ext2_super_block *sb;
int fd;
opt_complementary = "=1";
opts = getopt32(argv, "L:c:i:C:", &label, &str_c, &str_i, &str_C);
if (!opts)
bb_show_usage();
argv += optind; // argv[0] -- device
// read superblock
fd = xopen(argv[0], O_RDWR);
xlseek(fd, 1024, SEEK_SET);
sb = xzalloc(1024);
xread(fd, sb, 1024);
// mangle superblock
//STORE_LE(sb->s_wtime, time(NULL)); - why bother?
if (opts & OPT_C) {
int n = xatoi_range(str_C, 1, 0xfffe);
if (n == 0) n = 1;
STORE_LE(sb->s_mnt_count, (unsigned)n);
}
// set the label
if (opts & OPT_L)
safe_strncpy((char *)sb->s_volume_name, label, sizeof(sb->s_volume_name));
if (opts & OPT_c) {
int n = xatoi_range(str_c, -1, 0xfffe);
if (n == 0)
n = -1;
STORE_LE(sb->s_max_mnt_count, (unsigned)n);
}
if (opts & OPT_i) {
unsigned n = xatou_range(str_i, 0, (unsigned)0xffffffff / (24*60*60)) * 24*60*60;
STORE_LE(sb->s_checkinterval, n);
}
// write superblock
xlseek(fd, 1024, SEEK_SET);
xwrite(fd, sb, 1024);
if (ENABLE_FEATURE_CLEAN_UP) {
free(sb);
}
xclose(fd);
return EXIT_SUCCESS;
}
int nice_main(int argc, char **argv)
{
int old_priority, adjustment;
old_priority = getpriority(PRIO_PROCESS, 0);
if (!*++argv) { /* No args, so (GNU) output current nice value. */
printf("%d\n", old_priority);
fflush_stdout_and_exit(EXIT_SUCCESS);
}
adjustment = 10; /* Set default adjustment. */
if (argv[0][0] == '-') {
if (argv[0][1] == 'n') { /* -n */
if (argv[0][2]) { /* -nNNNN (w/o space) */
argv[0] += 2; argv--; argc++;
}
} else { /* -NNN (NNN may be negative) == -n NNN */
argv[0] += 1; argv--; argc++;
}
if (argc < 4) { /* Missing priority and/or utility! */
bb_show_usage();
}
adjustment = xatoi_range(argv[1], INT_MIN/2, INT_MAX/2);
argv += 2;
}
{ /* Set our priority. */
int prio = old_priority + adjustment;
if (setpriority(PRIO_PROCESS, 0, prio) < 0) {
bb_perror_msg_and_die("setpriority(%d)", prio);
}
}
execvp(*argv, argv); /* Now exec the desired program. */
/* The exec failed... */
xfunc_error_retval = (errno == ENOENT) ? 127 : 126; /* SUSv3 */
bb_perror_msg_and_die("%s", *argv);
}
int start_stop_daemon_main(int argc UNUSED_PARAM, char **argv)
{
unsigned opt;
char *signame;
char *startas;
char *chuid;
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
// char *retry_arg = NULL;
// int retries = -1;
char *opt_N;
#endif
INIT_G();
opt = GETOPT32(argv, "^"
"KSbqtma:n:s:u:c:x:p:"
IF_FEATURE_START_STOP_DAEMON_FANCY("ovN:R:")
/* -K or -S is required; they are mutually exclusive */
/* -p is required if -m is given */
/* -xpun (at least one) is required if -K is given */
/* -xa (at least one) is required if -S is given */
/* -q turns off -v */
"\0"
"K:S:K--S:S--K:m?p:K?xpun:S?xa"
IF_FEATURE_START_STOP_DAEMON_FANCY("q-v"),
LONGOPTS
&startas, &cmdname, &signame, &userspec, &chuid, &execname, &pidfile
IF_FEATURE_START_STOP_DAEMON_FANCY(,&opt_N)
/* We accept and ignore -R <param> / --retry <param> */
IF_FEATURE_START_STOP_DAEMON_FANCY(,NULL)
);
if (opt & OPT_s) {
signal_nr = get_signum(signame);
if (signal_nr < 0) bb_show_usage();
}
if (!(opt & OPT_a))
startas = execname;
if (!execname) /* in case -a is given and -x is not */
execname = startas;
if (execname) {
G.execname_sizeof = strlen(execname) + 1;
G.execname_cmpbuf = xmalloc(G.execname_sizeof + 1);
}
// IF_FEATURE_START_STOP_DAEMON_FANCY(
// if (retry_arg)
// retries = xatoi_positive(retry_arg);
// )
//argc -= optind;
argv += optind;
if (userspec) {
user_id = bb_strtou(userspec, NULL, 10);
if (errno)
user_id = xuname2uid(userspec);
}
/* Both start and stop need to know current processes */
do_procinit();
if (opt & CTX_STOP) {
int i = do_stop();
return (opt & OPT_OKNODO) ? 0 : (i <= 0);
}
if (G.found_procs) {
if (!QUIET)
printf("%s is already running\n%u\n", execname, (unsigned)G.found_procs->pid);
return !(opt & OPT_OKNODO);
}
#ifdef OLDER_VERSION_OF_X
if (execname)
xstat(execname, &G.execstat);
#endif
*--argv = startas;
if (opt & OPT_BACKGROUND) {
#if BB_MMU
bb_daemonize(DAEMON_DEVNULL_STDIO + DAEMON_CLOSE_EXTRA_FDS + DAEMON_DOUBLE_FORK);
/* DAEMON_DEVNULL_STDIO is superfluous -
* it's always done by bb_daemonize() */
#else
/* Daemons usually call bb_daemonize_or_rexec(), but SSD can do
* without: SSD is not itself a daemon, it _execs_ a daemon.
* The usual NOMMU problem of "child can't run indefinitely,
* it must exec" does not bite us: we exec anyway.
*/
pid_t pid = xvfork();
if (pid != 0) {
/* parent */
/* why _exit? the child may have changed the stack,
* so "return 0" may do bad things */
_exit(EXIT_SUCCESS);
}
/* Child */
setsid(); /* detach from controlling tty */
/* Redirect stdio to /dev/null, close extra FDs */
bb_daemon_helper(DAEMON_DEVNULL_STDIO + DAEMON_CLOSE_EXTRA_FDS);
#endif
}
if (opt & OPT_MAKEPID) {
/* User wants _us_ to make the pidfile */
write_pidfile(pidfile);
}
if (opt & OPT_c) {
struct bb_uidgid_t ugid;
parse_chown_usergroup_or_die(&ugid, chuid);
if (ugid.uid != (uid_t) -1L) {
struct passwd *pw = xgetpwuid(ugid.uid);
if (ugid.gid != (gid_t) -1L)
pw->pw_gid = ugid.gid;
/* initgroups, setgid, setuid: */
change_identity(pw);
} else if (ugid.gid != (gid_t) -1L) {
xsetgid(ugid.gid);
setgroups(1, &ugid.gid);
}
}
#if ENABLE_FEATURE_START_STOP_DAEMON_FANCY
if (opt & OPT_NICELEVEL) {
/* Set process priority */
int prio = getpriority(PRIO_PROCESS, 0) + xatoi_range(opt_N, INT_MIN/2, INT_MAX/2);
if (setpriority(PRIO_PROCESS, 0, prio) < 0) {
bb_perror_msg_and_die("setpriority(%d)", prio);
}
}
#endif
execvp(startas, argv);
bb_perror_msg_and_die("can't execute '%s'", startas);
}
int renice_main(int argc, char **argv)
{
static const char Xetpriority_msg[] ALIGN1 = "%cetpriority";
int retval = EXIT_SUCCESS;
int which = PRIO_PROCESS; /* Default 'which' value. */
int use_relative = 0;
int adjustment, new_priority;
unsigned who;
char *arg;
/* Yes, they are not #defines in glibc 2.4! #if won't work */
if (PRIO_PROCESS < CHAR_MIN || PRIO_PROCESS > CHAR_MAX)
BUG_bad_PRIO_PROCESS();
if (PRIO_PGRP < CHAR_MIN || PRIO_PGRP > CHAR_MAX)
BUG_bad_PRIO_PGRP();
if (PRIO_USER < CHAR_MIN || PRIO_USER > CHAR_MAX)
BUG_bad_PRIO_USER();
arg = *++argv;
/* Check if we are using a relative adjustment. */
if (arg && arg[0] == '-' && arg[1] == 'n') {
use_relative = 1;
if (!arg[2])
arg = *++argv;
else
arg += 2;
}
if (!arg) { /* No args? Then show usage. */
bb_show_usage();
}
/* Get the priority adjustment (absolute or relative). */
adjustment = xatoi_range(arg, INT_MIN/2, INT_MAX/2);
while ((arg = *++argv) != NULL) {
/* Check for a mode switch. */
if (arg[0] == '-' && arg[1]) {
static const char opts[] ALIGN1 = {
'p', 'g', 'u', 0, PRIO_PROCESS, PRIO_PGRP, PRIO_USER
};
const char *p = strchr(opts, arg[1]);
if (p) {
which = p[4];
if (!arg[2])
continue;
arg += 2;
}
}
/* Process an ID arg. */
if (which == PRIO_USER) {
struct passwd *p;
p = getpwnam(arg);
if (!p) {
bb_error_msg("unknown user: %s", arg);
goto HAD_ERROR;
}
who = p->pw_uid;
} else {
who = bb_strtou(arg, NULL, 10);
if (errno) {
bb_error_msg("bad value: %s", arg);
goto HAD_ERROR;
}
}
/* Get priority to use, and set it. */
if (use_relative) {
int old_priority;
errno = 0; /* Needed for getpriority error detection. */
old_priority = getpriority(which, who);
if (errno) {
bb_perror_msg(Xetpriority_msg, 'g');
goto HAD_ERROR;
}
new_priority = old_priority + adjustment;
} else {
new_priority = adjustment;
}
if (setpriority(which, who, new_priority) == 0) {
continue;
}
bb_perror_msg(Xetpriority_msg, 's');
HAD_ERROR:
retval = EXIT_FAILURE;
}
/* No need to check for errors outputing to stderr since, if it
* was used, the HAD_ERROR label was reached and retval was set. */
return retval;
}
