char *xmalloc_readlink_or_warn(const char *path)
{
char *buf = xmalloc_readlink(path);
if (!buf) {
/* EINVAL => "file: Invalid argument" => puzzled user */
bb_error_msg("%s: cannot read link (not a symlink?)", path);
}
return buf;
}
char* FAST_FUNC xmalloc_readlink_or_warn(const char *path)
{
char *buf = xmalloc_readlink(path);
if (!buf) {
/* EINVAL => "file: Invalid argument" => puzzled user */
const char *errmsg = "not a symlink";
int err = errno;
if (err != EINVAL)
errmsg = strerror(err);
bb_error_msg("%s: cannot read link: %s", path, errmsg);
}
return buf;
}
/*
* This routine is not the same as realpath(), which
* canonicalizes the given path completely. This routine only
* follows trailing symlinks until a real file is reached and
* returns its name. If the path ends in a dangling link or if
* the target doesn't exist, the path is returned in any case.
* Intermediate symlinks in the path are not expanded -- only
* those at the tail.
* A malloced char* is returned, which must be freed by the caller.
*/
char* FAST_FUNC xmalloc_follow_symlinks(const char *path)
{
char *buf;
char *lpc;
char *linkpath;
int bufsize;
int looping = MAXSYMLINKS + 1;
buf = xstrdup(path);
goto jump_in;
while (1) {
linkpath = xmalloc_readlink(buf);
if (!linkpath) {
/* not a symlink, or doesn't exist */
if (errno == EINVAL || errno == ENOENT)
return buf;
goto free_buf_ret_null;
}
if (!--looping) {
free(linkpath);
free_buf_ret_null:
free(buf);
return NULL;
}
if (*linkpath != '/') {
bufsize += strlen(linkpath);
buf = xrealloc(buf, bufsize);
lpc = bb_get_last_path_component_strip(buf);
strcpy(lpc, linkpath);
free(linkpath);
} else {
free(buf);
buf = linkpath;
jump_in:
bufsize = strlen(buf) + 1;
}
}
}
static int pid_is_exec(pid_t pid)
{
ssize_t bytes;
char buf[sizeof("/proc/%u/cmdline") + sizeof(int)*3];
char *procname, *exelink;
int match;
procname = buf + sprintf(buf, "/proc/%u/exe", (unsigned)pid) - 3;
exelink = xmalloc_readlink(buf);
match = (exelink && strcmp(execname, exelink) == 0);
free(exelink);
if (match)
return match;
strcpy(procname, "cmdline");
bytes = open_read_close(buf, G.execname_cmpbuf, G.execname_sizeof);
if (bytes > 0) {
G.execname_cmpbuf[bytes] = '\0';
return strcmp(execname, G.execname_cmpbuf) == 0;
}
return 0;
}
static smallint scan_recursive(const char *path)
{
DIR *d;
struct dirent *d_ent;
smallint stop_scan;
smallint retval;
d = opendir(path);
if (d == NULL)
return 0;
G.recursion_depth++;
retval = 0;
stop_scan = 0;
while (!stop_scan && (d_ent = readdir(d)) != NULL) {
struct stat statbuf;
pid_t pid;
char *subpath;
subpath = concat_subpath_file(path, d_ent->d_name);
if (subpath == NULL)
continue; /* . or .. */
switch (G.recursion_depth) {
case PROC_DIR:
pid = (pid_t)bb_strtou(d_ent->d_name, NULL, 10);
if (errno != 0
|| pid == G.mypid
/* "this PID doesn't use specified FILEs or PORT/PROTO": */
|| scan_recursive(subpath) == 0
) {
break;
}
if (option_mask32 & OPT_KILL) {
if (kill(pid, G.killsig) != 0) {
bb_perror_msg("kill pid %s", d_ent->d_name);
G.kill_failed = 1;
}
}
if (!(option_mask32 & OPT_SILENT))
printf("%s ", d_ent->d_name);
retval = 1;
break;
case PROC_DIR_LINKS:
switch (
index_in_substrings(
"cwd" "\0" "exe" "\0"
"root" "\0" "fd" "\0"
"lib" "\0" "mmap" "\0"
"maps" "\0",
d_ent->d_name
)
) {
enum {
CWD_LINK,
EXE_LINK,
ROOT_LINK,
FD_DIR_LINKS,
LIB_DIR_LINKS,
MMAP_DIR_LINKS,
MAPS,
};
case CWD_LINK:
case EXE_LINK:
case ROOT_LINK:
goto scan_link;
case FD_DIR_LINKS:
case LIB_DIR_LINKS:
case MMAP_DIR_LINKS:
// change for ofgwrite
retval = scan_recursive(subpath);
break;
case MAPS:
// change for ofgwrite
retval = scan_proc_net_or_maps(subpath, 0);
default:
break;
}
break;
case PROC_SUBDIR_LINKS:
scan_link:
if (stat(subpath, &statbuf) < 0)
break;
// change for ofgwrite
retval = search_dev_inode(&statbuf);
if (retval)
{
if (strcmp(d_ent->d_name, "exe") == 0)
{
char* ln = xmalloc_readlink(subpath);
if (ln != NULL)
{
// change for ofgwrite: Don't kill VU+ and GB specific processes
if (strcmp(ln, "/oldroot/usr/bin/dvb_server") == 0
|| strcmp(ln, "/oldroot/usr/bin/init_client") == 0
|| strcmp(ln, "/oldroot/usr/bin/ntfs-3g") == 0
|| strcmp(ln, "/oldroot/usr/share/platform/dvb_init") == 0
|| strcmp(ln, "/oldroot/usr/bin/nxserver") == 0
|| strcmp(ln, "/oldroot/usr/bin/init_driver") == 0
|| strcmp(ln, "/oldroot/usr/share/platform/dvb_init.bin") == 0
|| strcmp(ln, "/oldroot/usr/share/platform/nxserver") == 0
|| strcmp(ln, "/oldroot/usr/bin/showiframe") == 0
|| strcmp(ln, "/oldroot/usr/bin/libreader") == 0
|| ( strncmp(ln, "/oldroot/lib/modules/", 21) == 0
&& strstr(ln, "/extra/hi_play.ko") != NULL )
)
{
my_printf("found vu or gb or octagon or ntfs process %s -> don't kill\n", ln);
retval = 0;
stop_scan=1;
}
free(ln);
}
}
}
default:
break;
}
free(subpath);
}
closedir(d);
G.recursion_depth--;
return retval;
}
