#include "qemu.h"
-#define TARGET_NGROUPS 32
-
/* ??? This should really be somewhere else. */
abi_long memcpy_to_target(abi_ulong dest, const void *src,
unsigned long len)
/* Construct the envp and argv tables on the target stack. */
abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
- abi_ulong stringp, int push_ptr)
+ abi_ulong stringp)
{
int n = sizeof(abi_ulong);
abi_ulong envp;
envp = sp;
sp -= (argc + 1) * n;
argv = sp;
- if (push_ptr) {
- /* FIXME - handle put_user() failures */
- sp -= n;
- put_user_ual(envp, sp);
- sp -= n;
- put_user_ual(argv, sp);
- }
sp -= n;
/* FIXME - handle put_user() failures */
put_user_ual(argc, sp);
return sp;
}
+static bool is_there(const char *candidate)
+{
+ struct stat fin;
+
+ /* XXX work around access(2) false positives for superuser */
+ if (access(candidate, X_OK) == 0 && stat(candidate, &fin) == 0 &&
+ S_ISREG(fin.st_mode) && (getuid() != 0 ||
+ (fin.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)) != 0)) {
+ return true;
+ }
+
+ return false;
+}
+
int loader_exec(const char *filename, char **argv, char **envp,
struct target_pt_regs *regs, struct image_info *infop,
struct bsd_binprm *bprm)
{
- int retval;
- int i;
+ char *path, fullpath[PATH_MAX];
+ int retval, i;
- bprm->p = TARGET_PAGE_SIZE * MAX_ARG_PAGES - sizeof(unsigned int);
+ bprm->p = TARGET_PAGE_SIZE * MAX_ARG_PAGES;
for (i = 0; i < MAX_ARG_PAGES; i++) { /* clear page-table */
bprm->page[i] = NULL;
}
- retval = open(filename, O_RDONLY);
+
+ if (strchr(filename, '/') != NULL) {
+ path = realpath(filename, fullpath);
+ if (path == NULL) {
+ /* Failed to resolve. */
+ return -1;
+ }
+ if (!is_there(path)) {
+ return -1;
+ }
+ } else {
+ path = g_find_program_in_path(filename);
+ if (path == NULL) {
+ return -1;
+ }
+ }
+
+ retval = open(path, O_RDONLY);
if (retval < 0) {
+ g_free(path);
return retval;
}
+ bprm->fullpath = path;
bprm->fd = retval;
bprm->filename = (char *)filename;
bprm->argc = count(argv);