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author | Al Viro <viro@zeniv.linux.org.uk> | 2012-09-30 17:38:55 (GMT) |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-10-01 02:20:51 (GMT) |
commit | 38b983b3461e7d3c64a981e2338bb34605c46f30 (patch) | |
tree | fb7dc311ba4d175746fb693530cf63db9ddb8616 /fs | |
parent | 282124d18626379a20b41d25e0c580f290cd09d4 (diff) | |
download | linux-38b983b3461e7d3c64a981e2338bb34605c46f30.tar.xz |
generic sys_execve()
Selected by __ARCH_WANT_SYS_EXECVE in unistd.h. Requires
* working current_pt_regs()
* *NOT* doing a syscall-in-kernel kind of kernel_execve()
implementation. Using generic kernel_execve() is fine.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs')
-rw-r--r-- | fs/exec.c | 38 |
1 files changed, 34 insertions, 4 deletions
@@ -401,7 +401,7 @@ struct user_arg_ptr { union { const char __user *const __user *native; #ifdef CONFIG_COMPAT - compat_uptr_t __user *compat; + const compat_uptr_t __user *compat; #endif } ptr; }; @@ -1600,9 +1600,9 @@ int do_execve(const char *filename, } #ifdef CONFIG_COMPAT -int compat_do_execve(char *filename, - compat_uptr_t __user *__argv, - compat_uptr_t __user *__envp, +int compat_do_execve(const char *filename, + const compat_uptr_t __user *__argv, + const compat_uptr_t __user *__envp, struct pt_regs *regs) { struct user_arg_ptr argv = { @@ -2319,6 +2319,36 @@ int dump_seek(struct file *file, loff_t off) } EXPORT_SYMBOL(dump_seek); +#ifdef __ARCH_WANT_SYS_EXECVE +SYSCALL_DEFINE3(execve, + const char __user *, filename, + const char __user *const __user *, argv, + const char __user *const __user *, envp) +{ + const char *path = getname(filename); + int error = PTR_ERR(path); + if (!IS_ERR(path)) { + error = do_execve(path, argv, envp, current_pt_regs()); + putname(path); + } + return error; +} +#ifdef CONFIG_COMPAT +asmlinkage long compat_sys_execve(const char __user * filename, + const compat_uptr_t __user * argv, + const compat_uptr_t __user * envp) +{ + const char *path = getname(filename); + int error = PTR_ERR(path); + if (!IS_ERR(path)) { + error = compat_do_execve(path, argv, envp, current_pt_regs()); + putname(path); + } + return error; +} +#endif +#endif + #ifdef __ARCH_WANT_KERNEL_EXECVE int kernel_execve(const char *filename, const char *const argv[], |