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author | Warner Losh <imp@bsdimp.com> | 2022-06-14 14:44:10 -0600 |
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committer | Warner Losh <imp@bsdimp.com> | 2022-07-02 07:52:42 -0600 |
commit | c7b62b4a87b21c22ab9c227666b98e11e5afd34e (patch) | |
tree | 1dc4ec3d009c00f4c1774fab7afe31c454f518c1 | |
parent | af2ae2e8acfe2f64c12607be48a9f6a677b29a07 (diff) | |
download | qemu-c7b62b4a87b21c22ab9c227666b98e11e5afd34e.zip qemu-c7b62b4a87b21c22ab9c227666b98e11e5afd34e.tar.gz qemu-c7b62b4a87b21c22ab9c227666b98e11e5afd34e.tar.bz2 |
bsd-user: Implement symlink, symlinkat, readlink and readlinkat
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Jung-uk Kim <jkim@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
-rw-r--r-- | bsd-user/bsd-file.h | 74 | ||||
-rw-r--r-- | bsd-user/freebsd/os-syscall.c | 16 |
2 files changed, 90 insertions, 0 deletions
diff --git a/bsd-user/bsd-file.h b/bsd-user/bsd-file.h index a0f0310..635ac8d 100644 --- a/bsd-user/bsd-file.h +++ b/bsd-user/bsd-file.h @@ -601,4 +601,78 @@ static abi_long do_bsd_nmount(abi_long arg1, abi_long count, return ret; } +/* symlink(2) */ +static abi_long do_bsd_symlink(abi_long arg1, abi_long arg2) +{ + abi_long ret; + void *p1, *p2; + + LOCK_PATH2(p1, arg1, p2, arg2); + ret = get_errno(symlink(p1, p2)); /* XXX path(p1), path(p2) */ + UNLOCK_PATH2(p1, arg1, p2, arg2); + + return ret; +} + +/* symlinkat(2) */ +static abi_long do_bsd_symlinkat(abi_long arg1, abi_long arg2, + abi_long arg3) +{ + abi_long ret; + void *p1, *p2; + + LOCK_PATH2(p1, arg1, p2, arg3); + ret = get_errno(symlinkat(p1, arg2, p2)); /* XXX path(p1), path(p2) */ + UNLOCK_PATH2(p1, arg1, p2, arg3); + + return ret; +} + +/* readlink(2) */ +static abi_long do_bsd_readlink(CPUArchState *env, abi_long arg1, + abi_long arg2, abi_long arg3) +{ + abi_long ret; + void *p1, *p2; + + LOCK_PATH(p1, arg1); + p2 = lock_user(VERIFY_WRITE, arg2, arg3, 0); + if (p2 == NULL) { + UNLOCK_PATH(p1, arg1); + return -TARGET_EFAULT; + } + if (strcmp(p1, "/proc/curproc/file") == 0) { + CPUState *cpu = env_cpu(env); + TaskState *ts = (TaskState *)cpu->opaque; + strncpy(p2, ts->bprm->fullpath, arg3); + ret = MIN((abi_long)strlen(ts->bprm->fullpath), arg3); + } else { + ret = get_errno(readlink(path(p1), p2, arg3)); + } + unlock_user(p2, arg2, ret); + UNLOCK_PATH(p1, arg1); + + return ret; +} + +/* readlinkat(2) */ +static abi_long do_bsd_readlinkat(abi_long arg1, abi_long arg2, + abi_long arg3, abi_long arg4) +{ + abi_long ret; + void *p1, *p2; + + LOCK_PATH(p1, arg2); + p2 = lock_user(VERIFY_WRITE, arg3, arg4, 0); + if (p2 == NULL) { + UNLOCK_PATH(p1, arg2); + return -TARGET_EFAULT; + } + ret = get_errno(readlinkat(arg1, p1, p2, arg4)); + unlock_user(p2, arg3, ret); + UNLOCK_PATH(p1, arg2); + + return ret; +} + #endif /* BSD_FILE_H */ diff --git a/bsd-user/freebsd/os-syscall.c b/bsd-user/freebsd/os-syscall.c index bd4dfa6..80ec9dd 100644 --- a/bsd-user/freebsd/os-syscall.c +++ b/bsd-user/freebsd/os-syscall.c @@ -386,6 +386,22 @@ static abi_long freebsd_syscall(void *cpu_env, int num, abi_long arg1, ret = do_bsd_nmount(arg1, arg2, arg3); break; + case TARGET_FREEBSD_NR_symlink: /* symlink(2) */ + ret = do_bsd_symlink(arg1, arg2); + break; + + case TARGET_FREEBSD_NR_symlinkat: /* symlinkat(2) */ + ret = do_bsd_symlinkat(arg1, arg2, arg3); + break; + + case TARGET_FREEBSD_NR_readlink: /* readlink(2) */ + ret = do_bsd_readlink(cpu_env, arg1, arg2, arg3); + break; + + case TARGET_FREEBSD_NR_readlinkat: /* readlinkat(2) */ + ret = do_bsd_readlinkat(arg1, arg2, arg3, arg4); + break; + default: qemu_log_mask(LOG_UNIMP, "Unsupported syscall: %d\n", num); ret = -TARGET_ENOSYS; |