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New APIs: is-chardev, is-blockdev, is-fifo, is-symlink, is-socket

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These complement the existing is-file and is-dir APIs.
This commit is contained in:
Richard Jones
2010-09-09 22:43:32 +01:00
parent 3a99114360
commit 43eed09112
3 changed files with 126 additions and 20 deletions
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82
daemon/is.c
View File

@@ -41,30 +41,73 @@ do_exists (const char *path)
return r == 0;
}
static int get_mode (const char *path, mode_t *mode);
int
do_is_file (const char *path)
{
int r;
struct stat buf;
CHROOT_IN;
r = lstat (path, &buf);
CHROOT_OUT;
if (r == -1) {
if (errno != ENOENT && errno != ENOTDIR) {
reply_with_perror ("stat: %s", path);
return -1;
}
else
return 0; /* Not a file. */
}
return S_ISREG (buf.st_mode);
mode_t mode;
int r = get_mode (path, &mode);
if (r <= 0) return r;
return S_ISREG (mode);
}
int
do_is_dir (const char *path)
{
mode_t mode;
int r = get_mode (path, &mode);
if (r <= 0) return r;
return S_ISDIR (mode);
}
int
do_is_chardev (const char *path)
{
mode_t mode;
int r = get_mode (path, &mode);
if (r <= 0) return r;
return S_ISCHR (mode);
}
int
do_is_blockdev (const char *path)
{
mode_t mode;
int r = get_mode (path, &mode);
if (r <= 0) return r;
return S_ISBLK (mode);
}
int
do_is_fifo (const char *path)
{
mode_t mode;
int r = get_mode (path, &mode);
if (r <= 0) return r;
return S_ISFIFO (mode);
}
int
do_is_symlink (const char *path)
{
mode_t mode;
int r = get_mode (path, &mode);
if (r <= 0) return r;
return S_ISLNK (mode);
}
int
do_is_socket (const char *path)
{
mode_t mode;
int r = get_mode (path, &mode);
if (r <= 0) return r;
return S_ISSOCK (mode);
}
static int
get_mode (const char *path, mode_t *mode)
{
int r;
struct stat buf;
@@ -79,8 +122,9 @@ do_is_dir (const char *path)
return -1;
}
else
return 0; /* Not a directory. */
return 0; /* Doesn't exist, means return false. */
}
return S_ISDIR (buf.st_mode);
*mode = buf.st_mode;
return 1;
}

2
src/MAX_PROC_NR
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@@ -1 +1 @@
266
271

62
src/generator.ml
View File

@@ -5356,6 +5356,68 @@ filesystem can be found.
To find the label of a filesystem, use C<guestfs_vfs_label>.");
("is_chardev", (RBool "flag", [Pathname "path"]), 267, [],
[InitISOFS, Always, TestOutputFalse (
[["is_chardev"; "/directory"]]);
InitBasicFS, Always, TestOutputTrue (
[["mknod_c"; "0o777"; "99"; "66"; "/test"];
["is_chardev"; "/test"]])],
"test if character device",
"\
This returns C<true> if and only if there is a character device
with the given C<path> name.
See also C<guestfs_stat>.");
("is_blockdev", (RBool "flag", [Pathname "path"]), 268, [],
[InitISOFS, Always, TestOutputFalse (
[["is_blockdev"; "/directory"]]);
InitBasicFS, Always, TestOutputTrue (
[["mknod_b"; "0o777"; "99"; "66"; "/test"];
["is_blockdev"; "/test"]])],
"test if block device",
"\
This returns C<true> if and only if there is a block device
with the given C<path> name.
See also C<guestfs_stat>.");
("is_fifo", (RBool "flag", [Pathname "path"]), 269, [],
[InitISOFS, Always, TestOutputFalse (
[["is_fifo"; "/directory"]]);
InitBasicFS, Always, TestOutputTrue (
[["mkfifo"; "0o777"; "/test"];
["is_fifo"; "/test"]])],
"test if FIFO (named pipe)",
"\
This returns C<true> if and only if there is a FIFO (named pipe)
with the given C<path> name.
See also C<guestfs_stat>.");
("is_symlink", (RBool "flag", [Pathname "path"]), 270, [],
[InitISOFS, Always, TestOutputFalse (
[["is_symlink"; "/directory"]]);
InitISOFS, Always, TestOutputTrue (
[["is_symlink"; "/abssymlink"]])],
"test if symbolic link",
"\
This returns C<true> if and only if there is a symbolic link
with the given C<path> name.
See also C<guestfs_stat>.");
("is_socket", (RBool "flag", [Pathname "path"]), 271, [],
(* XXX Need a positive test for sockets. *)
[InitISOFS, Always, TestOutputFalse (
[["is_socket"; "/directory"]])],
"test if socket",
"\
This returns C<true> if and only if there is a Unix domain socket
with the given C<path> name.
See also C<guestfs_stat>.");
]
let all_functions = non_daemon_functions @ daemon_functions