/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
dos mode handling functions
Copyright (C) Andrew Tridgell 1992-1998
#include "includes.h"
-extern int DEBUGLEVEL;
-
/****************************************************************************
change a dos mode to a unix mode
base permission for files:
- everybody gets read bit set
+ if inheriting
+ apply read/write bits from parent directory.
+ else
+ everybody gets read bit set
dos readonly is represented in unix by removing everyone's write bit
dos archive is represented in unix by the user's execute bit
dos system is represented in unix by the group's execute bit
dos hidden is represented in unix by the other's execute bit
- Then apply create mask,
- then add force bits.
+ if !inheriting {
+ Then apply create mask,
+ then add force bits.
+ }
base permission for directories:
dos directory is represented in unix by unix's dir bit and the exec bit
- Then apply create mask,
- then add force bits.
+ if !inheriting {
+ Then apply create mask,
+ then add force bits.
+ }
****************************************************************************/
-mode_t unix_mode(connection_struct *conn,int dosmode)
+mode_t unix_mode(connection_struct *conn,int dosmode,const char *fname)
{
mode_t result = (S_IRUSR | S_IRGRP | S_IROTH);
+ mode_t dir_mode = 0; /* Mode of the parent directory if inheriting. */
if ( !IS_DOS_READONLY(dosmode) )
result |= (S_IWUSR | S_IWGRP | S_IWOTH);
-
+
+ if (fname && lp_inherit_perms(SNUM(conn))) {
+ char *dname;
+ SMB_STRUCT_STAT sbuf;
+
+ dname = parent_dirname(fname);
+ DEBUG(2,("unix_mode(%s) inheriting from %s\n",fname,dname));
+ if (vfs_stat(conn,dname,&sbuf) != 0) {
+ DEBUG(4,("unix_mode(%s) failed, [dir %s]: %s\n",fname,dname,strerror(errno)));
+ return(0); /* *** shouldn't happen! *** */
+ }
+
+ /* Save for later - but explicitly remove setuid bit for safety. */
+ dir_mode = sbuf.st_mode & ~S_ISUID;
+ DEBUG(2,("unix_mode(%s) inherit mode %o\n",fname,(int)dir_mode));
+ /* Clear "result" */
+ result = 0;
+ }
+
if (IS_DOS_DIR(dosmode)) {
/* We never make directories read only for the owner as under DOS a user
can always create a file in a read-only directory. */
- result |= (S_IFDIR | S_IXUSR | S_IXGRP | S_IXOTH | S_IWUSR);
- /* Apply directory mask */
- result &= lp_dir_mode(SNUM(conn));
- /* Add in force bits */
- result |= lp_force_dir_mode(SNUM(conn));
+ result |= (S_IFDIR | S_IWUSR);
+
+ if (dir_mode) {
+ /* Inherit mode of parent directory. */
+ result |= dir_mode;
+ } else {
+ /* Provisionally add all 'x' bits */
+ result |= (S_IXUSR | S_IXGRP | S_IXOTH);
+
+ /* Apply directory mask */
+ result &= lp_dir_mask(SNUM(conn));
+ /* Add in force bits */
+ result |= lp_force_dir_mode(SNUM(conn));
+ }
} else {
if (lp_map_archive(SNUM(conn)) && IS_DOS_ARCHIVE(dosmode))
result |= S_IXUSR;
if (lp_map_hidden(SNUM(conn)) && IS_DOS_HIDDEN(dosmode))
result |= S_IXOTH;
-
- /* Apply mode mask */
- result &= lp_create_mode(SNUM(conn));
- /* Add in force bits */
- result |= lp_force_create_mode(SNUM(conn));
+
+ if (dir_mode) {
+ /* Inherit 666 component of parent directory mode */
+ result |= dir_mode
+ & (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IWGRP | S_IWOTH);
+ } else {
+ /* Apply mode mask */
+ result &= lp_create_mask(SNUM(conn));
+ /* Add in force bits */
+ result |= lp_force_create_mode(SNUM(conn));
+ }
}
+
+ DEBUG(3,("unix_mode(%s) returning 0%o\n",fname,(int)result ));
return(result);
}
/****************************************************************************
change a unix mode to a dos mode
****************************************************************************/
-int dos_mode(connection_struct *conn,char *path,struct stat *sbuf)
+uint32 dos_mode(connection_struct *conn,char *path,SMB_STRUCT_STAT *sbuf)
{
- int result = 0;
-
- DEBUG(8,("dos_mode: %s\n", path));
+ int result = 0;
- if ((sbuf->st_mode & S_IWUSR) == 0)
- result |= aRONLY;
+ DEBUG(8,("dos_mode: %s\n", path));
- if (MAP_ARCHIVE(conn) && ((sbuf->st_mode & S_IXUSR) != 0))
- result |= aARCH;
+ if ((sbuf->st_mode & S_IWUSR) == 0)
+ result |= aRONLY;
+
+ if (MAP_ARCHIVE(conn) && ((sbuf->st_mode & S_IXUSR) != 0))
+ result |= aARCH;
- if (MAP_SYSTEM(conn) && ((sbuf->st_mode & S_IXGRP) != 0))
- result |= aSYSTEM;
-
- if (MAP_HIDDEN(conn) && ((sbuf->st_mode & S_IXOTH) != 0))
- result |= aHIDDEN;
+ if (MAP_SYSTEM(conn) && ((sbuf->st_mode & S_IXGRP) != 0))
+ result |= aSYSTEM;
+
+ if (MAP_HIDDEN(conn) && ((sbuf->st_mode & S_IXOTH) != 0))
+ result |= aHIDDEN;
- if (S_ISDIR(sbuf->st_mode))
- result = aDIR | (result & aRONLY);
+ if (S_ISDIR(sbuf->st_mode))
+ result = aDIR | (result & aRONLY);
+ if (sbuf->st_size > sbuf->st_blocks * (SMB_OFF_T)sbuf->st_blksize) {
+ result |= FILE_ATTRIBUTE_SPARSE;
+ }
+
#ifdef S_ISLNK
#if LINKS_READ_ONLY
- if (S_ISLNK(sbuf->st_mode) && S_ISDIR(sbuf->st_mode))
- result |= aRONLY;
+ if (S_ISLNK(sbuf->st_mode) && S_ISDIR(sbuf->st_mode))
+ result |= aRONLY;
#endif
#endif
- /* hide files with a name starting with a . */
- if (lp_hide_dot_files(SNUM(conn)))
- {
- char *p = strrchr(path,'/');
- if (p)
- p++;
- else
- p = path;
-
- if (p[0] == '.' && p[1] != '.' && p[1] != 0)
- result |= aHIDDEN;
- }
-
- /* Optimization : Only call is_hidden_path if it's not already
- hidden. */
- if (!(result & aHIDDEN) && IS_HIDDEN_PATH(conn,path))
- {
- result |= aHIDDEN;
- }
-
- DEBUG(8,("dos_mode returning "));
-
- if (result & aHIDDEN) DEBUG(8, ("h"));
- if (result & aRONLY ) DEBUG(8, ("r"));
- if (result & aSYSTEM) DEBUG(8, ("s"));
- if (result & aDIR ) DEBUG(8, ("d"));
- if (result & aARCH ) DEBUG(8, ("a"));
-
- DEBUG(8,("\n"));
-
- return(result);
+ /* hide files with a name starting with a . */
+ if (lp_hide_dot_files(SNUM(conn))) {
+ char *p = strrchr_m(path,'/');
+ if (p)
+ p++;
+ else
+ p = path;
+
+ if (p[0] == '.' && p[1] != '.' && p[1] != 0)
+ result |= aHIDDEN;
+ }
+
+ /* Optimization : Only call is_hidden_path if it's not already
+ hidden. */
+ if (!(result & aHIDDEN) && IS_HIDDEN_PATH(conn,path)) {
+ result |= aHIDDEN;
+ }
+
+ DEBUG(8,("dos_mode returning "));
+
+ if (result & aHIDDEN) DEBUG(8, ("h"));
+ if (result & aRONLY ) DEBUG(8, ("r"));
+ if (result & aSYSTEM) DEBUG(8, ("s"));
+ if (result & aDIR ) DEBUG(8, ("d"));
+ if (result & aARCH ) DEBUG(8, ("a"));
+
+ DEBUG(8,("\n"));
+
+ return(result);
}
/*******************************************************************
chmod a file - but preserve some bits
********************************************************************/
-int dos_chmod(connection_struct *conn,char *fname,int dosmode,struct stat *st)
+int file_chmod(connection_struct *conn,char *fname, uint32 dosmode,SMB_STRUCT_STAT *st)
{
- struct stat st1;
- int mask=0;
- int tmp;
- int unixmode;
-
- if (!st) {
- st = &st1;
- if (sys_stat(fname,st)) return(-1);
- }
+ SMB_STRUCT_STAT st1;
+ int mask=0;
+ mode_t tmp;
+ mode_t unixmode;
+ int ret = -1;
+
+ if (!st) {
+ st = &st1;
+ if (vfs_stat(conn,fname,st))
+ return(-1);
+ }
- if (S_ISDIR(st->st_mode)) dosmode |= aDIR;
+ if (S_ISDIR(st->st_mode))
+ dosmode |= aDIR;
+ else
+ dosmode &= ~aDIR;
- if (dos_mode(conn,fname,st) == dosmode) return(0);
+ if (dos_mode(conn,fname,st) == dosmode)
+ return(0);
- unixmode = unix_mode(conn,dosmode);
+ unixmode = unix_mode(conn,dosmode,fname);
- /* preserve the s bits */
- mask |= (S_ISUID | S_ISGID);
+ /* preserve the s bits */
+ mask |= (S_ISUID | S_ISGID);
- /* preserve the t bit */
+ /* preserve the t bit */
#ifdef S_ISVTX
- mask |= S_ISVTX;
+ mask |= S_ISVTX;
#endif
- /* possibly preserve the x bits */
- if (!MAP_ARCHIVE(conn)) mask |= S_IXUSR;
- if (!MAP_SYSTEM(conn)) mask |= S_IXGRP;
- if (!MAP_HIDDEN(conn)) mask |= S_IXOTH;
-
- unixmode |= (st->st_mode & mask);
-
- /* if we previously had any r bits set then leave them alone */
- if ((tmp = st->st_mode & (S_IRUSR|S_IRGRP|S_IROTH))) {
- unixmode &= ~(S_IRUSR|S_IRGRP|S_IROTH);
- unixmode |= tmp;
- }
-
- /* if we previously had any w bits set then leave them alone
- if the new mode is not rdonly */
- if (!IS_DOS_READONLY(dosmode) &&
- (tmp = st->st_mode & (S_IWUSR|S_IWGRP|S_IWOTH))) {
- unixmode &= ~(S_IWUSR|S_IWGRP|S_IWOTH);
- unixmode |= tmp;
- }
-
- return(sys_chmod(fname,unixmode));
+ /* possibly preserve the x bits */
+ if (!MAP_ARCHIVE(conn))
+ mask |= S_IXUSR;
+ if (!MAP_SYSTEM(conn))
+ mask |= S_IXGRP;
+ if (!MAP_HIDDEN(conn))
+ mask |= S_IXOTH;
+
+ unixmode |= (st->st_mode & mask);
+
+ /* if we previously had any r bits set then leave them alone */
+ if ((tmp = st->st_mode & (S_IRUSR|S_IRGRP|S_IROTH))) {
+ unixmode &= ~(S_IRUSR|S_IRGRP|S_IROTH);
+ unixmode |= tmp;
+ }
+
+ /* if we previously had any w bits set then leave them alone
+ whilst adding in the new w bits, if the new mode is not rdonly */
+ if (!IS_DOS_READONLY(dosmode)) {
+ unixmode |= (st->st_mode & (S_IWUSR|S_IWGRP|S_IWOTH));
+ }
+
+ if ((ret = vfs_chmod(conn,fname,unixmode)) == 0)
+ return 0;
+
+ if((errno != EPERM) && (errno != EACCES))
+ return -1;
+
+ if(!lp_dos_filemode(SNUM(conn)))
+ return -1;
+
+ /* We want DOS semantics, ie allow non owner with write permission to change the
+ bits on a file. Just like file_utime below.
+ */
+
+ /* Check if we have write access. */
+ if (CAN_WRITE(conn)) {
+ /*
+ * We need to open the file with write access whilst
+ * still in our current user context. This ensures we
+ * are not violating security in doing the fchmod.
+ * This file open does *not* break any oplocks we are
+ * holding. We need to review this.... may need to
+ * break batch oplocks open by others. JRA.
+ */
+ files_struct *fsp = open_file_fchmod(conn,fname,st);
+ if (!fsp)
+ return -1;
+ become_root();
+ ret = conn->vfs_ops.fchmod(fsp, fsp->fd, unixmode);
+ unbecome_root();
+ close_file_fchmod(fsp);
+ }
+
+ return( ret );
}
/*******************************************************************
-Wrapper around sys_utime that possibly allows DOS semantics rather
+Wrapper around dos_utime that possibly allows DOS semantics rather
than POSIX.
*******************************************************************/
int file_utime(connection_struct *conn, char *fname, struct utimbuf *times)
{
extern struct current_user current_user;
- struct stat sb;
+ SMB_STRUCT_STAT sb;
int ret = -1;
errno = 0;
- if(sys_utime(fname, times) == 0)
+ if(conn->vfs_ops.utime(conn,fname, times) == 0)
return 0;
if((errno != EPERM) && (errno != EACCES))
(as DOS does).
*/
- if(sys_stat(fname,&sb) != 0)
+ if(vfs_stat(conn,fname,&sb) != 0)
return -1;
/* Check if we have write access. */
in_group(sb.st_gid,current_user.gid,
current_user.ngroups,current_user.groups)))) {
/* We are allowed to become root and change the filetime. */
- become_root(False);
- ret = sys_utime(fname, times);
- unbecome_root(False);
+ become_root();
+ ret = conn->vfs_ops.utime(conn,fname, times);
+ unbecome_root();
}
}
if (file_utime(conn, fname, ×)) {
DEBUG(4,("set_filetime(%s) failed: %s\n",fname,strerror(errno)));
+ return False;
}
return(True);
}
-
-
git.samba.org / samba.git / blobdiff