void nohup_main(void)
{
xsignal(SIGHUP, SIG_IGN);
if (isatty(1)) {
close(1);
if (-1 == open("nohup.out", O_CREAT|O_APPEND|O_WRONLY,
S_IRUSR|S_IWUSR ))
{
char *temp = getenv("HOME");
temp = xmprintf("%s/%s", temp ? temp : "", "nohup.out");
xcreate(temp, O_CREAT|O_APPEND|O_WRONLY, 0600);
free(temp);
}
}
if (isatty(0)) {
close(0);
xopen_stdio("/dev/null", O_RDONLY);
}
xexec(toys.optargs);
}
void pwdx_main(void)
{
char **optargs;
for (optargs = toys.optargs; *optargs; optargs++) {
char *path;
int num_bytes;
path = xmprintf("/proc/%s/cwd", *optargs);
num_bytes = readlink(path, toybuf, sizeof(toybuf)-1);
free(path);
if (num_bytes==-1) {
path = strerror(errno);
toys.exitval = 1;
} else {
path = toybuf;
toybuf[num_bytes] = 0;
}
xprintf("%s: %s\n", *optargs, path);
}
}
static void update_groupfiles(char *filename, char* username)
{
char *filenamesfx = NULL, *sfx = NULL, *line = NULL;
FILE *exfp, *newfp;
int ulen = strlen(username);
struct flock lock;
filenamesfx = xmprintf("%s+", filename);
sfx = strchr(filenamesfx, '+');
exfp = xfopen(filename, "r+");
*sfx = '-';
unlink(filenamesfx);
if (link(filename, filenamesfx)) error_msg("Can't create backup file");
*sfx = '+';
lock.l_type = F_WRLCK;
lock.l_whence = SEEK_SET;
lock.l_start = lock.l_len = 0;
if (fcntl(fileno(exfp), F_SETLK, &lock) < 0)
perror_msg("Couldn't lock file %s",filename);
lock.l_type = F_UNLCK; //unlocking at a later stage
newfp = xfopen(filenamesfx, "w+");
while ((line = get_line(fileno(exfp))) != NULL){
sprintf(toybuf, "%s:",username);
if (!strncmp(line, toybuf, ulen+1)) goto LOOP;
else {
char *n, *p = strrchr(line, ':');
if (p && *++p && (n = strstr(p, username))) {
do {
if (n[ulen] == ',') {
*n = '\0';
n += ulen + 1;
fprintf(newfp, "%s%s\n", line, n);
break;
} else if (!n[ulen]) {
if (n[-1] == ',') n[-1] = *n = '\0';
if (n[-1] == ':') *n = '\0';
fprintf(newfp, "%s%s\n", line, n);
break;
} else n += ulen;
} while (*n && (n=strstr(n, username)));
if (!n) fprintf(newfp, "%s\n", line);
} else fprintf(newfp, "%s\n", line);
}
LOOP:
free(line);
}
fcntl(fileno(exfp), F_SETLK, &lock);
fclose(exfp);
errno = 0;
fflush(newfp);
fsync(fileno(newfp));
fclose(newfp);
rename(filenamesfx, filename);
if (errno){
perror_msg("File Writing/Saving failed: ");
unlink(filenamesfx);
}
free(filenamesfx);
}
static void inittab_parsing(void)
{
int i, fd, line_number = 0, token_count = 0;
char *p, *q, *extracted_token, *tty_name = NULL, *command = NULL, *tmp;
uint8_t action = 0;
char *act_name = "sysinit\0wait\0once\0respawn\0askfirst\0ctrlaltdel\0"
"shutdown\0restart\0";
fd = open("/etc/inittab", O_RDONLY);
if (fd < 0) {
error_msg("Unable to open /etc/inittab. Using Default inittab");
add_new_action(SYSINIT, "/etc/init.d/rcS", "");
add_new_action(RESPAWN, "/sbin/getty -n -l /bin/sh -L 115200 tty1 vt100", "");
} else {
while((q = p = get_line(fd))) { //read single line from /etc/inittab
char *x;
if ((x = strchr(p, '#'))) *x = '\0';
line_number++;
token_count = 0;
action = 0;
while ((extracted_token = strsep(&p,":"))) {
token_count++;
switch (token_count) {
case 1:
if (*extracted_token) {
if (!strncmp(extracted_token, "/dev/", 5))
tty_name = xmprintf("%s",extracted_token);
else tty_name = xmprintf("/dev/%s",extracted_token);
} else tty_name = xstrdup("");
break;
case 2:
break;
case 3:
for (tmp = act_name, i = 0; *tmp; i++, tmp += strlen(tmp) +1) {
if (!strcmp(tmp, extracted_token)) {
action = 1 << i;
break;
}
}
if (!*tmp) error_msg("Invalid action at line number %d ---- ignoring",line_number);
break;
case 4:
command = xstrdup(extracted_token);
break;
default:
error_msg("Bad inittab entry at line %d", line_number);
break;
}
} //while token
if (q) free(q);
if (token_count != 4) continue;
if (action) add_new_action(action, command, tty_name);
free(tty_name);
free(command);
} //while line
close(fd);
}
}