X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=bsd-user%2Fbsdload.c;h=5b3c061a452a6025eb0fe54f34d24a02ec4c8938;hb=9d14db15b121c81a008098c46053d98cd6a0da6b;hp=379015c74441f6aa9906fadf775d7947388c540b;hpb=223005f0584ece2868b0b5ac11b06f3984aad569;p=mirror_qemu.git

diff --git a/bsd-user/bsdload.c b/bsd-user/bsdload.c
index 379015c744..5b3c061a45 100644
--- a/bsd-user/bsdload.c
+++ b/bsd-user/bsdload.c
@@ -19,8 +19,6 @@
 
 #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)
@@ -98,7 +96,7 @@ static int prepare_binprm(struct bsd_binprm *bprm)
 
 /* 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;
@@ -108,13 +106,6 @@ abi_ulong loader_build_argptr(int envc, int argc, abi_ulong sp,
     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);
@@ -139,21 +130,55 @@ abi_ulong loader_build_argptr(int envc, int argc, abi_ulong 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)
 {
+    char *path, fullpath[PATH_MAX];
     int retval, i;
 
     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);