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| author | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-09-24 09:26:10 +0000 |
|---|---|---|
| committer | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-09-24 09:26:10 +0000 |
| commit | 5e0ccb18da28cc9fdac725ef41a7c174125b56ac (patch) | |
| tree | 62b1616180a05329e925646f2754802367685d59 /linux-user | |
| parent | f0b6243d5d7c18efbfcc7e477ffb9b8f523e2fef (diff) | |
| download | qemu-5e0ccb18da28cc9fdac725ef41a7c174125b56ac.tar.gz | |
linux-user readlinkat() syscall, by Thayne Harbaugh.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3225 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'linux-user')
| -rw-r--r-- | linux-user/syscall.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index c7e5edf01e..639191f8aa 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -147,6 +147,7 @@ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \ #define __NR_sys_mkdirat __NR_mkdirat #define __NR_sys_mknodat __NR_mknodat #define __NR_sys_openat __NR_openat +#define __NR_sys_readlinkat __NR_readlinkat #define __NR_sys_renameat __NR_renameat #define __NR_sys_rt_sigqueueinfo __NR_rt_sigqueueinfo #define __NR_sys_symlinkat __NR_symlinkat @@ -192,6 +193,10 @@ _syscall4(int,sys_mknodat,int,dirfd,const char *,pathname, #if defined(TARGET_NR_openat) && defined(__NR_openat) _syscall4(int,sys_openat,int,dirfd,const char *,pathname,int,flags,mode_t,mode) #endif +#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat) +_syscall4(int,sys_readlinkat,int,dirfd,const char *,pathname, + char *,buf,size_t,bufsize) +#endif #if defined(TARGET_NR_renameat) && defined(__NR_renameat) _syscall4(int,sys_renameat,int,olddirfd,const char *,oldpath, int,newdirfd,const char *,newpath) @@ -3402,6 +3407,28 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3, unlock_user(p, arg1, 0); } break; +#if defined(TARGET_NR_readlinkat) && defined(__NR_readlinkat) + case TARGET_NR_readlinkat: + if (!arg2 || !arg3) { + ret = -EFAULT; + goto fail; + } + { + void *p2 = NULL; + p = lock_user_string(arg2); + p2 = lock_user(arg3, arg4, 0); + if (!access_ok(VERIFY_READ, p, 1) + || !access_ok(VERIFY_READ, p2, 1)) + ret = -EFAULT; + else + ret = get_errno(sys_readlinkat(arg1, path(p), p2, arg4)); + if (p2) + unlock_user(p2, arg3, ret); + if (p) + unlock_user(p, arg2, 0); + } + break; +#endif #ifdef TARGET_NR_uselib case TARGET_NR_uselib: goto unimplemented; |