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hurd: Consolidate file_name_lookup implementation

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Instead of __file_name_lookup_at delegating to __file_name_lookup
in simple cases, make __file_name_lookup_at deal with both cases, and
have __file_name_lookup simply wrap __file_name_lookup_at.

This factorizes handling the empy name case.

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230130125216.6254-2-bugaevc@gmail.com>
This commit is contained in:
Sergey Bugaev 2023-01-30 15:52:14 +03:00 committed by Samuel Thibault
parent 98f9435f33
commit d011ab5708
2 changed files with 37 additions and 24 deletions
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10
hurd/hurdlookup.c
View File

@ -16,6 +16,7 @@
<https://www.gnu.org/licenses/>. */
#include <hurd.h>
#include <hurd/fd.h>
#include <hurd/lookup.h>
#include <string.h>
#include <fcntl.h>
@ -220,14 +221,7 @@ weak_alias (__hurd_directory_name_split, hurd_directory_name_split)
file_t
__file_name_lookup (const char *file_name, int flags, mode_t mode)
{
error_t err;
file_t result;
err = __hurd_file_name_lookup (&_hurd_ports_use, &__getdport, 0,
file_name, flags, mode & ~_hurd_umask,
&result);
return err ? (__hurd_fail (err), MACH_PORT_NULL) : result;
return __file_name_lookup_at (AT_FDCWD, 0, file_name, flags, mode);
}
weak_alias (__file_name_lookup, file_name_lookup)

51
hurd/lookup-at.c
View File

@ -36,9 +36,6 @@ __file_name_lookup_at (int fd, int at_flags,
if (err)
return (__hurd_fail (err), MACH_PORT_NULL);
if (fd == AT_FDCWD || file_name[0] == '/')
return __file_name_lookup (file_name, flags, mode);
if (empty != 0 && file_name[0] == '\0')
{
enum retry_type doretry;
@ -56,22 +53,44 @@ __file_name_lookup_at (int fd, int at_flags,
return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
}
file_t startdir;
error_t use_init_port (int which, error_t (*operate) (mach_port_t))
if (fd == AT_FDCWD || file_name[0] == '/')
{
return (which == INIT_PORT_CWDIR ? (*operate) (startdir)
: _hurd_ports_use (which, operate));
err = __hurd_file_name_lookup (&_hurd_ports_use, &__getdport, 0,
file_name, flags, mode & ~_hurd_umask,
&result);
if (err)
{
__hurd_fail (err);
return MACH_PORT_NULL;
}
}
else
{
file_t startdir;
/* We need to look the file up relative to the given directory (and
not our cwd). For this to work, we supply our own wrapper for
_hurd_ports_use, which replaces cwd with our startdir. */
error_t use_init_port (int which, error_t (*operate) (mach_port_t))
{
return (which == INIT_PORT_CWDIR ? (*operate) (startdir)
: _hurd_ports_use (which, operate));
}
err = HURD_DPORT_USE (fd, (startdir = port,
__hurd_file_name_lookup (&use_init_port,
&__getdport, NULL,
file_name,
flags,
mode & ~_hurd_umask,
&result)));
if (err)
{
__hurd_dfail (fd, err);
return MACH_PORT_NULL;
}
}
err = HURD_DPORT_USE (fd, (startdir = port,
__hurd_file_name_lookup (&use_init_port,
&__getdport, NULL,
file_name,
flags,
mode & ~_hurd_umask,
&result)));
return err ? (__hurd_dfail (fd, err), MACH_PORT_NULL) : result;
return result;
}
file_t