diff options
| author | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-01-30 20:09:01 +0000 |
|---|---|---|
| committer | aurel32 <aurel32@c046a42c-6fe2-441c-8c8c-71466251a162> | 2009-01-30 20:09:01 +0000 |
| commit | d088d664f2015ba9d168e61d56c599cee81f2aad (patch) | |
| tree | a299f658523698fc9e6ad3007e19003a5e60abd8 /linux-user/syscall.c | |
| parent | 04a6dfebb6b52532a1e0bd637899f1eba14e94c6 (diff) | |
| download | qemu-d088d664f2015ba9d168e61d56c599cee81f2aad.zip | |
linux-user: identify running binary in /proc/self/exe
Some applications like to test /proc/self/exe to find
out who they are. Fake the result of readlink() for
them. Use realpath() to return full path to binary
(which the links /proc/self/exe are)
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6485 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 3e21bb311c..8d52099cb9 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -4410,13 +4410,22 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, #endif case TARGET_NR_readlink: { - void *p2; + void *p2, *temp; p = lock_user_string(arg1); p2 = lock_user(VERIFY_WRITE, arg2, arg3, 0); if (!p || !p2) ret = -TARGET_EFAULT; - else - ret = get_errno(readlink(path(p), p2, arg3)); + else { + if (strncmp((const char *)p, "/proc/self/exe", 14) == 0) { + char real[PATH_MAX]; + temp = realpath(exec_path,real); + ret = (temp==NULL) ? get_errno(-1) : strlen(real) ; + snprintf((char *)p2, arg3, "%s", real); + } + else + ret = get_errno(readlink(path(p), p2, arg3)); + break; + } unlock_user(p2, arg2, ret); unlock_user(p, arg1, 0); } |