/* Virtual File System switch code Copyright (C) 1995 The Free Software Foundation Written by: 1995 Miguel de Icaza 1995 Jakub Jelinek 1998 Pavel Machek This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Warning: funtions like extfs_lstat() have right to destroy any * strings you pass to them. This is acutally ok as you strdup what * you are passing to them, anyway; still, beware. */ #include #include #include /* For atol() */ #include #include #include #include #include #include #include #ifdef SCO_FLAVOR #include /* alex: for struct timeb definition */ #endif /* SCO_FLAVOR */ #include #include #include "../src/fs.h" #include "../src/mad.h" #include "../src/dir.h" #include "../src/util.h" #include "../src/main.h" #ifndef VFS_STANDALONE #include "../src/panel.h" #include "../src/key.h" /* Required for the async alarm handler */ #include "../src/layout.h" /* For get_panel_widget and get_other_index */ #endif #include "vfs.h" #include "mcfs.h" #include "names.h" #include "extfs.h" #ifdef USE_NETCODE # include "tcputil.h" #endif extern int get_other_type (void); extern int extfs_which (char *path); int vfs_timeout = 60; /* VFS timeout in seconds */ int vfs_flags = /* Flags */ #ifdef VFS_STANDALONE 0; #else FL_ALWAYS_MAGIC; #endif extern int cd_symlinks; /* Defined in main.c */ /* They keep track of the current directory */ static vfs *current_vfs = &local_vfs_ops; char *current_dir = NULL; /* * FIXME: this is broken. It depends on mc not crossing border on month! */ static int current_mday; static int current_mon; static int current_year; uid_t vfs_uid = 0; gid_t vfs_gid = 0; /* Open files managed by the vfs layer */ #define MAX_VFS_FILES 100 static struct { void *fs_info; vfs *operations; } vfs_file_table [MAX_VFS_FILES]; static int get_bucket (void) { int i; /* 0, 1, 2 are reserved file descriptors, while (DIR *) 0 means error */ for (i = 3; i < MAX_VFS_FILES; i++){ if (!vfs_file_table [i].fs_info) return i; } vfs_die ("No more virtual file handles"); } vfs *vfs_type_from_op (char *path) { #ifdef USE_NETCODE if (!(vfs_flags & FL_NO_MCFS) && !strncmp (path, "mc:", 3)) return &mcfs_vfs_ops; if (!(vfs_flags & FL_NO_FTPFS) && !strncmp (path, "ftp:", 4)) return &ftpfs_vfs_ops; #endif #ifdef USE_EXT2FSLIB if (!(vfs_flags & FL_NO_UNDELFS) && !strncmp (path, "undel:", 6)) return &undelfs_vfs_ops; #endif if (!(vfs_flags & FL_NO_FISH) && !strncmp (path, "sh:", 3)) return &fish_vfs_ops; if (!(vfs_flags & FL_NO_TARFS) && !strcmp (path, "utar")) return &tarfs_vfs_ops; if (!(vfs_flags & FL_NO_EXTFS) && extfs_which (path) != -1) return &extfs_vfs_ops; if (!(vfs_flags & FL_NO_SFS) && sfs_which (path) != -1) return &sfs_vfs_ops; return NULL; } int path_magic( char *path ) { int res; res = !strncmp( path, "/#/", 3 ); if (res) path[1] = '/'; return res || (vfs_flags & FL_ALWAYS_MAGIC); } /* * Splits path '/p1#op/inpath' into inpath,op; returns which vfs it is. * What is left in path is p1. You still want to free(path), you DON'T * want to free neither *inpath nor *op */ vfs *vfs_split (char *path, char **inpath, char **op) { char *semi = strrchr (path, '#'); char *slash; vfs *ret; if (!semi) return NULL; slash = strchr (semi, '/'); *semi = 0; if (op) *op = NULL; if (inpath) *inpath = NULL; if (slash) *slash = 0; if ((ret = vfs_type_from_op (semi+1))){ if (op) *op = semi+1; if (inpath) *inpath = slash?slash+1:NULL; return ret; } if (slash) *slash = '/'; ret = vfs_split (path, inpath, op); *semi = '#'; return ret; } vfs* vfs_rosplit (char *path) { char *semi = strrchr (path, '#'); char *slash; vfs *ret; if (!semi) return NULL; slash = strchr (semi, '/'); *semi = 0; if (slash) *slash = 0; ret = vfs_type_from_op (semi+1); if (slash) *slash = '/'; if (!ret) ret = vfs_rosplit (path); *semi = '#'; return ret; } vfs *vfs_type (char *path) { vfs *vfs = vfs_rosplit(path); if (!vfs) vfs = &local_vfs_ops; return vfs; } static struct vfs_stamping *stamps; /* Returns the number of seconds remaining to the vfs timeout * * FIXME: currently this is set to 10 seconds. We should compute this. */ int vfs_timeouts () { return stamps ? 10 : 0; } void vfs_addstamp (vfs *v, vfsid id, struct vfs_stamping *parent) { if (v != &local_vfs_ops && id != (vfsid)-1){ struct vfs_stamping *stamp, *st1; for (stamp = stamps; stamp != NULL; st1 = stamp, stamp = stamp->next) if (stamp->v == v && stamp->id == id){ gettimeofday(&(stamp->time), NULL); return; } stamp = xmalloc (sizeof (struct vfs_stamping), "vfs stamping"); stamp->v = v; stamp->id = id; if (parent){ struct vfs_stamping *st = stamp; for (; parent;){ st->parent = xmalloc (sizeof (struct vfs_stamping), "vfs stamping"); *st->parent = *parent; parent = parent->parent; st = st->parent; } st->parent = 0; } else stamp->parent = 0; gettimeofday (&(stamp->time), NULL); stamp->next = 0; if (stamps) st1->next = stamp; else stamps = stamp; } } void vfs_stamp (vfs *v, vfsid id) { struct vfs_stamping *stamp; for (stamp = stamps; stamp != NULL; stamp = stamp->next) if (stamp->v == v && stamp->id == id){ gettimeofday (&(stamp->time), NULL); if (stamp->parent != NULL) vfs_stamp (stamp->parent->v, stamp->parent->id); return; } } void vfs_rm_parents (struct vfs_stamping *stamp) { struct vfs_stamping *st2, *st3; if (stamp){ for (st2 = stamp, st3 = st2->parent; st3 != NULL; st2 = st3, st3 = st3->parent) free (st2); free (st2); } } void vfs_rmstamp (vfs *v, vfsid id, int removeparents) { struct vfs_stamping *stamp, *st1; for (stamp = stamps, st1 = NULL; stamp != NULL; st1 = stamp, stamp = stamp->next) if (stamp->v == v && stamp->id == id){ if (stamp->parent != NULL){ if (removeparents) vfs_rmstamp (stamp->parent->v, stamp->parent->id, 1); vfs_rm_parents (stamp->parent); } if (st1 == NULL){ stamps = stamp->next; } else { st1->next = stamp->next; } free (stamp); return; } } static int ferrno (vfs *vfs) { return vfs->ferrno ? (*vfs->ferrno)() : EOPNOTSUPP; /* Hope that error message is obscure enough ;-) */ } int mc_open (char *file, int flags, ...) { int handle; int mode; void *info; vfs *vfs; va_list ap; file = vfs_canon (file); vfs = vfs_type (file); /* Get the mode flag */ /* FIXME: should look if O_CREAT is present */ va_start (ap, flags); mode = va_arg (ap, int); va_end (ap); if (!vfs->open) vfs_die( "VFS must support open.\n" ); info = (*vfs->open) (file, flags, mode); /* open must be supported */ free (file); if (!info){ errno = ferrno (vfs); return -1; } handle = get_bucket (); vfs_file_table [handle].fs_info = info; vfs_file_table [handle].operations = vfs; return handle; } #define vfs_op(handle) vfs_file_table [handle].operations #define vfs_info(handle) vfs_file_table [handle].fs_info #define vfs_free_bucket(handle) vfs_info(handle) = 0; #define MC_OP(name, inarg, callarg, pre, post) \ int mc_##name inarg \ { \ vfs *vfs; \ int result; \ \ pre \ result = vfs->name ? (*vfs->name)callarg : -1; \ post \ if (result == -1) \ errno = vfs->name ? ferrno (vfs) : EOPNOTSUPP; \ return result; \ } #define MC_NAMEOP(name, inarg, callarg) \ MC_OP (name, inarg, callarg, path = vfs_canon (path); vfs = vfs_type (path);, free (path); ) #define MC_HANDLEOP(name, inarg, callarg) \ MC_OP (name, inarg, callarg, if (handle == -1) return -1; vfs = vfs_op (handle);, ) MC_HANDLEOP(read, (int handle, char *buffer, int count), (vfs_info (handle), buffer, count) ); int mc_ctl (int handle, int ctlop, int arg) { vfs *vfs; int result; vfs = vfs_op (handle); result = vfs->ctl ? (*vfs->ctl)(vfs_info (handle), ctlop, arg) : 0; return result; } int mc_setctl (char *path, int ctlop, char *arg) { vfs *vfs; int result; path = vfs_canon (path); vfs = vfs_type (path); result = vfs->setctl ? (*vfs->setctl)(path, ctlop, arg) : 0; free (path); return result; } int mc_close (int handle) { vfs *vfs; int result; if (handle == -1 || !vfs_info (handle)) return -1; vfs = vfs_op (handle); if (handle < 3) return close (handle); if (!vfs->close) vfs_die( "VFS must support close.\n" ); result = (*vfs->close)(vfs_info (handle)); vfs_free_bucket (handle); if (result == -1) errno = ferrno (vfs); return result; } DIR *mc_opendir (char *dirname) { int handle, *handlep; void *info; vfs *vfs; char *p = NULL; int i = strlen (dirname); if (dirname [i - 1] != '/'){ /* We should make possible reading of the root directory in a tar file */ p = xmalloc (i + 2, "slash"); strcpy (p, dirname); strcpy (p + i, "/"); dirname = p; } dirname = vfs_canon (dirname); vfs = vfs_type (dirname); info = vfs->opendir ? (*vfs->opendir)(dirname) : NULL; free (dirname); if (p) free (p); if (!info){ errno = vfs->opendir ? ferrno (vfs) : EOPNOTSUPP; return NULL; } handle = get_bucket (); vfs_file_table [handle].fs_info = info; vfs_file_table [handle].operations = vfs; handlep = (int *) xmalloc (sizeof (int), "opendir handle"); *handlep = handle; return (DIR *) handlep; } /* This should strip the non needed part of a path name */ #define vfs_name(x) x void mc_seekdir (DIR *dirp, int offset) { int handle; vfs *vfs; if (!dirp){ errno = EFAULT; return; } handle = *(int *) dirp; vfs = vfs_op (handle); if (vfs->seekdir) (*vfs->seekdir) (vfs_info (handle), offset); else errno = EOPNOTSUPP; } #define MC_DIROP(name, type, onerr ) \ type mc_##name (DIR *dirp) \ { \ int handle; \ vfs *vfs; \ type result; \ \ if (!dirp){ \ errno = EFAULT; \ return onerr; \ } \ handle = *(int *) dirp; \ vfs = vfs_op (handle); \ result = vfs->name ? (*vfs->name) (vfs_info (handle)) : onerr; \ if (result == onerr) \ errno = vfs->name ? ferrno(vfs) : EOPNOTSUPP; \ return result; \ } MC_DIROP (readdir, struct dirent *, NULL) MC_DIROP (telldir, int, -1) int mc_closedir (DIR *dirp) { int handle = *(int *) dirp; vfs *vfs = vfs_op (handle); int result; result = vfs->closedir ? (*vfs->closedir)(vfs_info (handle)) : -1; vfs_free_bucket (handle); free (dirp); return result; } MC_NAMEOP (stat, (char *path, struct stat *buf), (vfs_name (path), buf)) MC_NAMEOP (lstat, (char *path, struct stat *buf), (vfs_name (path), buf)) MC_HANDLEOP (fstat, (int handle, struct stat *buf), (vfs_info (handle), buf)) /* * You must strdup whatever this function returns, static buffers are in use */ char *mc_return_cwd (void) { char *p; struct stat my_stat, my_stat2; if (!vfs_rosplit (current_dir)){ static char buffer[MC_MAXPATHLEN]; p = get_current_wd (buffer, MC_MAXPATHLEN); if (!p) /* One of the directories in the path is not readable */ return current_dir; /* Otherwise check if it is O.K. to use the current_dir */ mc_stat (p, &my_stat); mc_stat (current_dir, &my_stat2); if (my_stat.st_ino != my_stat2.st_ino || my_stat.st_dev != my_stat2.st_dev || !cd_symlinks){ free (current_dir); current_dir = strdup (p); return p; } /* Otherwise we return current_dir below */ } return current_dir; } char *mc_get_current_wd (char *buffer, int size) { char *cwd = mc_return_cwd(); if (strlen (cwd) > size){ vfs_die ("Current_dir size overflow.\n"); } strcpy (buffer, cwd); return buffer; } MC_NAMEOP (chmod, (char *path, int mode), (vfs_name (path), mode)) MC_NAMEOP (chown, (char *path, int owner, int group), (vfs_name (path), owner, group)) MC_NAMEOP (utime, (char *path, struct utimbuf *times), (vfs_name (path), times)) MC_NAMEOP (readlink, (char *path, char *buf, int bufsiz), (vfs_name (path), buf, bufsiz)) MC_NAMEOP (unlink, (char *path), (vfs_name (path))) MC_NAMEOP (symlink, (char *name1, char *path), (vfs_name (name1), vfs_name (path))) #define MC_RENAMEOP(name) \ int mc_##name (char *name1, char *name2) \ { \ vfs *vfs; \ int result; \ \ name1 = vfs_canon (name1); \ vfs = vfs_type (name1); \ name2 = vfs_canon (name2); \ if (vfs != vfs_type (name2)){ \ errno = EXDEV; \ free (name1); \ free (name2); \ return -1; \ } \ \ result = vfs->name ? (*vfs->name)(vfs_name (name1), vfs_name (name2)) : -1; \ free (name1); \ free (name2); \ if (result == -1) \ errno = vfs->name ? ferrno (vfs) : EOPNOTSUPP; \ return result; \ } MC_RENAMEOP (link); MC_RENAMEOP (rename); MC_HANDLEOP (write, (int handle, char *buf, int nbyte), (vfs_info (handle), buf, nbyte)); off_t mc_lseek (int fd, off_t offset, int whence) { vfs *vfs; int result; if (fd == -1) return -1; vfs = vfs_op (fd); result = vfs->lseek ? (*vfs->lseek)(vfs_info (fd), offset, whence) : -1; if (result == -1) errno = vfs->lseek ? ferrno (vfs) : EOPNOTSUPP; return result; } /* * remove //, /./ and /../, local should point to big enough buffer */ #define ISSLASH(a) (!a || (a == '/')) void vfs_kill_dots (char *path, char *local) { char *s = path, *t = local; char *last_slash = path; *t++ = *s++; while (1){ if (ISSLASH (*s)){ if (*last_slash != '/') vfs_die ("/ not there.\n"); if (ISSLASH (last_slash [1])) t--; if (last_slash [1] == '.'){ if (ISSLASH(last_slash [2])) t -= 2; if ((last_slash [2] == '.') && (ISSLASH (last_slash [3]))){ t -= 4; while ((t >= local) && (*t != '/')) t--; } } last_slash = s; } if (t <= local){ *local = '/'; t = local; } if (!*s) break; *t++ = *s++; *t = 0; } *t = 0; if (!(*local)){ local [0] = '/'; local [1] = 0; } } char *vfs_canon (char *path) { if (*path == '~'){ /* Tilde expansion */ char *local, *result; local = tilde_expand (path); if (local){ result = vfs_canon (local); free (local); return result; } else return strdup (path); } if (*path != '/'){ /* Relative to current directory */ char *local, *result; if (current_dir [strlen (current_dir) - 1] == '/') local = copy_strings (current_dir, path, NULL); else local = copy_strings (current_dir, "/", path, NULL); result = vfs_canon (local); free (local); return result; } /* So we have path of following form: * /p1/p2#op/.././././p3#op/p4. Good luck. */ canonicalize_pathname (path); return strdup (path); } vfsid vfs_ncs_getid (vfs *nvfs, char *dir, struct vfs_stamping **par) { vfsid nvfsid; int freeit = 0; if (dir [strlen (dir) - 1] != '/'){ dir = copy_strings (dir, "/", NULL); freeit = 1; } nvfsid = (*nvfs->getid)(dir, par); if (freeit) free (dir); return nvfsid; } static int is_parent (vfs * nvfs, vfsid nvfsid, struct vfs_stamping *parent) { struct vfs_stamping *stamp; for (stamp = parent; stamp; stamp = stamp->parent) if (stamp->v == nvfs && stamp->id == nvfsid) break; return (stamp ? 1 : 0); } void vfs_add_noncurrent_stamps (vfs * oldvfs, vfsid oldvfsid, struct vfs_stamping *parent) { #ifndef VFS_STANDALONE vfs *nvfs, *n2vfs, *n3vfs; vfsid nvfsid, n2vfsid, n3vfsid; struct vfs_stamping *par, *stamp; int f; /* FIXME: As soon as we convert to multiple panels, this stuff has to change. It works like this: We do not time out the vfs's which are current in any panel and on the other side we add the old directory with all its parents which are not in any panel (if we find such one, we stop adding parents to the time-outing structure. */ /* There are three directories we have to take care of: current_dir, cpanel->cwd and opanel->cwd. Athough most of the time either current_dir and cpanel->cwd or current_dir and opanel->cwd are the same, it's possible that all three are different -- Norbert */ if (!cpanel) return; nvfs = vfs_type (current_dir); nvfsid = vfs_ncs_getid (nvfs, current_dir, &par); vfs_rmstamp (nvfs, nvfsid, 1); f = is_parent (oldvfs, oldvfsid, par); vfs_rm_parents (par); if ((nvfs == oldvfs && nvfs == oldvfsid) || oldvfsid == (vfsid *)-1 || f){ return; } if (get_current_type () == view_listing){ n2vfs = vfs_type (cpanel->cwd); n2vfsid = vfs_ncs_getid (n2vfs, cpanel->cwd, &par); f = is_parent (oldvfs, oldvfsid, par); vfs_rm_parents (par); if ((n2vfs == oldvfs && n2vfsid == oldvfsid) || f) return; } else { n2vfs = (vfs *) -1; n2vfsid = (vfs *) -1; } if (get_other_type () == view_listing){ n3vfs = vfs_type (opanel->cwd); n3vfsid = vfs_ncs_getid (n3vfs, opanel->cwd, &par); f = is_parent (oldvfs, oldvfsid, par); vfs_rm_parents (par); if ((n3vfs == oldvfs && n3vfsid == oldvfsid) || f) return; } else { n3vfs = (vfs *)-1; n3vfsid = (vfs *)-1; } if ((*oldvfs->nothingisopen) (oldvfsid)){ if (oldvfs == &extfs_vfs_ops && ((extfs_archive *) oldvfsid)->name == 0){ /* Free the resources immediatly when we leave a mtools fs ('cd a:') instead of waiting for the vfs-timeout */ (oldvfs->free) (oldvfsid); } else vfs_addstamp (oldvfs, oldvfsid, parent); for (stamp = parent; stamp != NULL; stamp = stamp->parent){ if ((stamp->v == nvfs && stamp->id == nvfsid) || (stamp->v == n2vfs && stamp->id == n2vfsid) || (stamp->v == n3vfs && stamp->id == n3vfsid) || stamp->id == (vfsid) - 1 || !(*stamp->v->nothingisopen) (stamp->id)) break; if (stamp->v == &extfs_vfs_ops && ((extfs_archive *) stamp->id)->name == 0){ (stamp->v->free) (stamp->id); vfs_rmstamp (stamp->v, stamp->id, 0); } else vfs_addstamp (stamp->v, stamp->id, stamp->parent); } } #else vfs_addstamp (oldvfs, oldvfsid, parent); #endif } static void vfs_stamp_path (char *path) { vfs *vfs; vfsid id; struct vfs_stamping *par, *stamp; vfs = vfs_type (path); id = vfs_ncs_getid (vfs, path, &par); vfs_addstamp (vfs, id, par); for (stamp = par; stamp != NULL; stamp = stamp->parent) vfs_addstamp (stamp->v, stamp->id, stamp->parent); vfs_rm_parents (par); } #ifndef VFS_STANDALONE void vfs_add_current_stamps (void) { vfs_stamp_path (current_dir); if (get_current_type () == view_listing) vfs_stamp_path (cpanel->cwd); if (get_other_type () == view_listing) vfs_stamp_path (opanel->cwd); } #endif /* This function is really broken */ int mc_chdir (char *path) { char *a, *b; int result; char *p = NULL; int i = strlen (path); vfs *oldvfs; vfsid oldvfsid; struct vfs_stamping *parent; if (path [i - 1] != '/'){ /* We should make possible reading of the root directory in a tar archive */ p = xmalloc (i + 2, "slash"); strcpy (p, path); strcpy (p + i, "/"); path = p; } a = current_dir; /* Save a copy for case of failure */ current_dir = vfs_canon (path); current_vfs = vfs_type (current_dir); b = strdup (current_dir); result = (*current_vfs->chdir)(vfs_name (b)); free (b); if (result == -1){ errno = ferrno (current_vfs); free (current_dir); current_vfs = vfs_type (a); current_dir = a; } else { oldvfs = vfs_type (a); oldvfsid = vfs_ncs_getid (oldvfs, a, &parent); free (a); vfs_add_noncurrent_stamps (oldvfs, oldvfsid, parent); vfs_rm_parents (parent); } if (p) free (p); if (*current_dir){ p = strchr (current_dir, 0) - 1; if (*p == '/' && p > current_dir) *p = 0; /* Sometimes we assume no trailing slash on cwd */ } return result; } int vfs_current_is_local (void) { return current_vfs == &local_vfs_ops; } int vfs_current_is_extfs (void) { return current_vfs == &extfs_vfs_ops; } int vfs_current_is_tarfs (void) { return current_vfs == &tarfs_vfs_ops; } int vfs_file_is_local (char *filename) { vfs *vfs; filename = vfs_canon (filename); vfs = vfs_type (filename); free (filename); return vfs == &local_vfs_ops; } int vfs_file_is_ftp (char *filename) { #ifdef USE_NETCODE vfs *vfs; filename = vfs_canon (filename); vfs = vfs_type (filename); free (filename); return vfs == &ftpfs_vfs_ops; #else return 0; #endif } char *vfs_get_current_dir (void) { return current_dir; } void vfs_setup_wd (void) { current_dir = strdup ("/"); if (!(vfs_flags & FL_NO_CWDSETUP)) mc_return_cwd(); if (strlen(current_dir)>MC_MAXPATHLEN-2) vfs_die ("Current dir too long.\n"); return; } MC_NAMEOP (mkdir, (char *path, mode_t mode), (vfs_name (path), mode)) MC_NAMEOP (rmdir, (char *path), (vfs_name (path))) MC_NAMEOP (mknod, (char *path, int mode, int dev), (vfs_name (path), mode, dev)) #ifdef HAVE_MMAP struct mc_mmapping { caddr_t addr; void *vfs_info; vfs *vfs; struct mc_mmapping *next; } *mc_mmaparray = NULL; caddr_t mc_mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t offset) { vfs *vfs; caddr_t result; struct mc_mmapping *mcm; if (fd == -1) return (caddr_t) -1; vfs = vfs_op (fd); result = vfs->mmap ? (*vfs->mmap)(addr, len, prot, flags, vfs_info (fd), offset) : (caddr_t)-1; if (result == (caddr_t)-1){ errno = ferrno (vfs); return (caddr_t)-1; } mcm = (struct mc_mmapping *) xmalloc (sizeof (struct mc_mmapping), "vfs: mmap handling"); mcm->addr = result; mcm->vfs_info = vfs_info (fd); mcm->vfs = vfs; mcm->next = mc_mmaparray; mc_mmaparray = mcm; return result; } int mc_munmap (caddr_t addr, size_t len) { struct mc_mmapping *mcm, *mcm2 = NULL; for (mcm = mc_mmaparray; mcm != NULL; mcm2 = mcm, mcm = mcm->next){ if (mcm->addr == addr){ if (mcm2 == NULL) mc_mmaparray = mcm->next; else mcm2->next = mcm->next; if (*mcm->vfs->munmap) (*mcm->vfs->munmap)(addr, len, mcm->vfs_info); free (mcm); return 0; } } return -1; } #endif char *mc_def_getlocalcopy (char *filename) { char *tmp; int fdin, fdout, i; char buffer[8192]; struct stat mystat; fdin = mc_open (filename, O_RDONLY); if (fdin == -1) return NULL; tmp = tmpnam(NULL); fdout = creat (tmp, 0600); /* FIXME: What about symlink attack ? */ if (fdout == -1){ mc_close (fdin); return NULL; } tmp = strdup (tmp); while ((i = mc_read (fdin, buffer, sizeof (buffer))) == sizeof (buffer)){ write (fdout, buffer, i); } if (i != -1) write (fdout, buffer, i); mc_close (fdin); close (fdout); if (mc_stat (filename, &mystat) != -1){ chmod (tmp, mystat.st_mode); } return tmp; } char *mc_getlocalcopy (char *path) { vfs *vfs; char *result; path = vfs_canon (path); vfs = vfs_type (path); result = vfs->getlocalcopy ? (*vfs->getlocalcopy)(vfs_name (path)) : mc_def_getlocalcopy (vfs_name (path)); free (path); if (!result) errno = ferrno (vfs); return result; } void mc_def_ungetlocalcopy (char *filename, char *local, int has_changed) { if (has_changed){ int fdin, fdout, i; char buffer [8192]; fdin = open (local, O_RDONLY); if (fdin == -1){ unlink (local); free (local); return; } fdout = mc_open (filename, O_WRONLY | O_TRUNC); if (fdout == -1){ close (fdin); unlink (local); free (local); return; } while ((i = read (fdin, buffer, sizeof (buffer))) == sizeof (buffer)){ mc_write (fdout, buffer, i); } if (i != -1) mc_write (fdout, buffer, i); close (fdin); mc_close (fdout); } unlink (local); free (local); } void mc_ungetlocalcopy (char *path, char *local, int has_changed) { vfs *vfs; path = vfs_canon (path); vfs = vfs_type (path); vfs->ungetlocalcopy ? (*vfs->ungetlocalcopy)(vfs_name (path), local, has_changed) : mc_def_ungetlocalcopy (vfs_name (path), local, has_changed); free (path); } /* * Hmm, as timeout is minute or so, do we need to care about usecs? */ inline int timeoutcmp (struct timeval *t1, struct timeval *t2) { return ((t1->tv_sec < t2->tv_sec) || ((t1->tv_sec == t2->tv_sec) && (t1->tv_usec <= t2->tv_usec))); } void vfs_timeout_handler (void) { struct timeval time; struct vfs_stamping *stamp, *st; gettimeofday (&time, NULL); time.tv_sec -= vfs_timeout; for (stamp = stamps; stamp != NULL;){ if (timeoutcmp (&stamp->time, &time)){ st = stamp->next; (*stamp->v->free) (stamp->id); vfs_rmstamp (stamp->v, stamp->id, 0); stamp = st; } else stamp = stamp->next; } } void vfs_init (void) { time_t current_time; struct tm *t; memset (vfs_file_table, 0, sizeof (vfs_file_table)); current_time = time (NULL); t = localtime (¤t_time); current_mday = t->tm_mday; current_mon = t->tm_mon; current_year = t->tm_year; #ifdef USE_NETCODE tcp_init(); ftpfs_init(); #endif fish_init (); extfs_init (); sfs_init (); vfs_setup_wd (); } void vfs_free_resources (char *path) { vfs *vfs; vfsid vid; struct vfs_stamping *parent; vfs = vfs_type (path); vid = vfs_ncs_getid (vfs, path, &parent); if (vid != (vfsid) -1) (*vfs->free)(vid); vfs_rm_parents (parent); } #if 0 /* Shutdown a vfs given a path name */ void vfs_shut_path (char *p) { vfs *the_vfs; struct vfs_stamping *par; the_vfs = vfs_type (p); vfs_ncs_getid (the_vfs, p, &par); (*par->v->free)(par->id); vfs_rm_parents (par); } #endif void vfs_shut (void) { struct vfs_stamping *stamp, *st; for (stamp = stamps, stamps = 0; stamp != NULL;){ (*stamp->v->free)(stamp->id); st = stamp->next; free (stamp); stamp = st; } if (stamps) vfs_rmstamp (stamps->v, stamps->id, 1); if (current_dir) free (current_dir); extfs_done (); sfs_done(); #ifdef USE_NETCODE fish_done(); ftpfs_done(); #endif } /* These ones grab information from the VFS * and handles them to an upper layer */ void vfs_fill_names (void (*func)(char *)) { #ifdef USE_NETCODE mcfs_fill_names (func); ftpfs_fill_names (func); fish_fill_names (func); #endif tarfs_fill_names (func); extfs_fill_names (func); sfs_fill_names (func); } /* Following stuff (parse_ls_lga) is used by ftpfs and extfs */ #define MAXCOLS 30 static char *columns [MAXCOLS]; /* Points to the string in column n */ static int column_ptr [MAXCOLS]; /* Index from 0 to the starting positions of the columns */ int split_text (char *p) { char *original = p; int numcols; for (numcols = 0; *p && numcols < MAXCOLS; numcols++){ while (*p == ' ' || *p == '\r' || *p == '\n'){ *p = 0; p++; } columns [numcols] = p; column_ptr [numcols] = p - original; while (*p && *p != ' ' && *p != '\r' && *p != '\n') p++; } return numcols; } static int is_num (int idx) { if (!columns [idx] || columns [idx][0] < '0' || columns [idx][0] > '9') return 0; return 1; } static int is_time (char *str, struct tm *tim) { char *p, *p2; if ((p=strchr(str, ':')) && (p2=strrchr(str, ':'))) { if (p != p2) { if (sscanf (str, "%2d:%2d:%2d", &tim->tm_hour, &tim->tm_min, &tim->tm_sec) != 3) return (0); } else { if (sscanf (str, "%2d:%2d", &tim->tm_hour, &tim->tm_min) != 2) return (0); } } else return (0); return (1); } static int is_year(char *str, struct tm *tim) { /* Old code recognized 02904baa as year identification :-( */ long year; if (strchr(str,':')) return 0; if (strlen(str)!=4) return 0; if (sscanf(str, "%d", &year) != 1) return 0; if (year < 1900 || year > 3000) return 0; tim->tm_year = (int) (year - 1900); return 1; } /* * FIXME: this is broken. Consider following entry: -rwx------ 1 root root 1 Aug 31 10:04 2904 1234 where "2904 1234" is filename. Well, this code decodes it as year :-(. */ int parse_filetype (char c) { switch (c){ case 'd': return S_IFDIR; case 'b': return S_IFBLK; case 'c': return S_IFCHR; case 'l': return S_IFLNK; case 's': #ifdef IS_IFSOCK /* And if not, we fall through to IFIFO, which is pretty close */ return S_IFSOCK; #endif case 'p': return S_IFIFO; case 'm': case 'n': /* Don't know what these are :-) */ case '-': case '?': return S_IFREG; default: return -1; } } int parse_filemode (char *p) { /* converts rw-rw-rw- into 0666 */ int res = 0; switch (*(p++)){ case 'r': res |= 0400; break; case '-': break; default: return -1; } switch (*(p++)){ case 'w': res |= 0200; break; case '-': break; default: return -1; } switch (*(p++)){ case 'x': res |= 0100; break; case 's': res |= 0100 | S_ISUID; break; case 'S': res |= S_ISUID; break; case '-': break; default: return -1; } switch (*(p++)){ case 'r': res |= 0040; break; case '-': break; default: return -1; } switch (*(p++)){ case 'w': res |= 0020; break; case '-': break; default: return -1; } switch (*(p++)){ case 'x': res |= 0010; break; case 's': res |= 0010 | S_ISGID; break; case 'S': res |= S_ISGID; break; case '-': break; default: return -1; } switch (*(p++)){ case 'r': res |= 0004; break; case '-': break; default: return -1; } switch (*(p++)){ case 'w': res |= 0002; break; case '-': break; default: return -1; } switch (*(p++)){ case 'x': res |= 0001; break; case 't': res |= 0001 | S_ISVTX; break; case 'T': res |= S_ISVTX; break; case '-': break; default: return -1; } return res; } int parse_filedate(int idx, time_t *t) { /* This thing parses from idx in columns[] array */ static char *month = "JanFebMarAprMayJunJulAugSepOctNovDec"; static char *week = "SunMonTueWedThuFriSat"; char *p, *pos; int extfs_format_date = 0; struct tm tim; /* Let's setup default time values */ tim.tm_year = current_year; tim.tm_mon = current_mon; tim.tm_mday = current_mday; tim.tm_hour = 0; tim.tm_min = 0; tim.tm_sec = 0; tim.tm_isdst = 0; p = columns [idx++]; if((pos=strstr(week, p)) != NULL){ tim.tm_wday = (pos - week)/3; p = columns [idx++]; } if((pos=strstr(month, p)) != NULL) tim.tm_mon = (pos - month)/3; else { /* This case should not normaly happen, but in extfs we allow these date formats: Mon DD hh:mm Mon DD YYYY Mon DD YYYY hh:mm Wek Mon DD hh:mm:ss YYYY MM-DD-YY hh:mm where Mon is Jan-Dec, DD, MM, YY two digit day, month, year, YYYY four digit year, hh, mm two digit hour and minute. */ if (strlen (p) == 8 && p [2] == '-' && p [5] == '-'){ p [2] = 0; p [5] = 0; tim.tm_mon = (int) atol (p); if (!tim.tm_mon) return 0; else tim.tm_mon--; tim.tm_mday = (int) atol (p + 3); tim.tm_year = (int) atol (p + 6); if (tim.tm_year < 70) tim.tm_year += 70; extfs_format_date = 1; } else return 0; } if (!extfs_format_date){ if (!is_num (idx)) return 0; tim.tm_mday = (int)atol (columns [idx++]); } if (is_num (idx)) { if(is_time(columns[idx], &tim) || is_year(columns[idx], &tim)) { idx++; if(is_num (idx) && (is_year(columns[idx], &tim) || is_time(columns[idx], &tim))) idx++; /* time & year or reverse */ } /* only time or date */ } else return 0; /* Nor time or date */ if ((*t = mktime(&tim)) ==-1) *t = 0; return idx; } #define free_and_return(x) { free (p_copy); return (x); } int parse_ls_lga (char *p, struct stat *s, char **filename, char **linkname) { int idx, idx2, num_cols, isconc = 0; int i; char *p_copy; if (strncmp (p, "total", 5) == 0) return 0; if ((i = parse_filetype(*(p++))) == -1) return 0; s->st_mode = i; if (*p == '['){ if (strlen (p) <= 8 || p [8] != ']') return 0; /* Should parse here the Notwell permissions :) */ if (S_ISDIR (s->st_mode)) s->st_mode |= (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR | S_IXUSR | S_IXGRP | S_IXOTH); else s->st_mode |= (S_IRUSR | S_IRGRP | S_IROTH | S_IWUSR); p += 9; } else { if ((i = parse_filemode(p)) ==-1) return 0; s->st_mode |= i; p += 9; } p_copy = strdup (p); num_cols = split_text (p); s->st_nlink = atol (columns [0]); if (s->st_nlink <= 0) free_and_return (0); if (!is_num (1)) s->st_uid = finduid (columns [1]); else s->st_uid = (uid_t) atol (columns [1]); /* Mhm, the ls -lg did not produce a group field */ for (idx = 3; idx <= 5; idx++) if ((*columns [idx] >= 'A' && *columns [idx] <= 'S' && strlen (columns[idx]) == 3) || (strlen (columns[idx])==8 && columns [idx][2] == '-' && columns [idx][5] == '-')) break; if (idx == 6 || (idx == 5 && !S_ISCHR (s->st_mode) && !S_ISBLK (s->st_mode))) free_and_return (0); if (idx < 5){ char *p = strchr(columns [idx - 1], ','); if (p && p[1] >= '0' && p[1] <= '9') isconc = 1; } if (idx == 3 || (idx == 4 && !isconc && (S_ISCHR(s->st_mode) || S_ISBLK (s->st_mode)))) idx2 = 2; else { if (is_num (2)) s->st_gid = (gid_t) atol (columns [2]); else s->st_gid = findgid (columns [2]); idx2 = 3; } if (S_ISCHR (s->st_mode) || S_ISBLK (s->st_mode)){ char *p; if (!is_num (idx2)) free_and_return (0); #ifdef HAVE_ST_RDEV s->st_rdev = (atol (columns [idx2]) & 0xff) << 8; #endif if (isconc){ p = strchr (columns [idx2], ','); if (!p || p [1] < '0' || p [1] > '9') free_and_return (0); p++; } else { p = columns [idx2 + 1]; if (!is_num (idx2+1)) free_and_return (0); } #ifdef HAVE_ST_RDEV s->st_rdev |= (atol (p) & 0xff); #endif s->st_size = 0; } else { if (!is_num (idx2)) free_and_return (0); s->st_size = (size_t) atol (columns [idx2]); #ifdef HAVE_ST_RDEV s->st_rdev = 0; #endif } idx = parse_filedate(idx, &s->st_mtime); if (!idx) free_and_return (0); /* Use resulting time value */ s->st_atime = s->st_ctime = s->st_mtime; s->st_dev = 0; s->st_ino = 0; #ifdef HAVE_ST_BLKSIZE s->st_blksize = 512; #endif #ifdef HAVE_ST_BLOCKS s->st_blocks = (s->st_size + 511) / 512; #endif for (i = idx + 1, idx2 = 0; i < num_cols; i++ ) if (strcmp (columns [i], "->") == 0){ idx2 = i; break; } if (((S_ISLNK (s->st_mode) || (num_cols == idx + 3 && s->st_nlink > 1))) /* Maybe a hardlink? (in extfs) */ && idx2){ int p; char *s; if (filename){ p = column_ptr [idx2] - column_ptr [idx]; s = xmalloc (p, "filename"); strncpy (s, p_copy + column_ptr [idx], p - 1); s[p - 1] = '\0'; *filename = s; } if (linkname){ s = strdup (p_copy + column_ptr [idx2+1]); p = strlen (s); if (s [p-1] == '\r' || s [p-1] == '\n') s [p-1] = 0; if (s [p-2] == '\r' || s [p-2] == '\n') s [p-2] = 0; *linkname = s; } } else { /* Extract the filename from the string copy, not from the columns * this way we have a chance of entering hidden directories like ". ." */ if (filename){ /* *filename = strdup (columns [idx++]); */ int p; char *s; s = strdup (p_copy + column_ptr [idx++]); p = strlen (s); if (s [p-1] == '\r' || s [p-1] == '\n') s [p-1] = 0; if (s [p-2] == '\r' || s [p-2] == '\n') s [p-2] = 0; *filename = s; } if (linkname) *linkname = NULL; } free_and_return (1); } void vfs_force_expire (char *pathname) { vfs *vfs; pathname = vfs_canon (pathname); vfs = vfs_type (pathname); if (vfs->forget_about) (*vfs->forget_about) (pathname); free (pathname); } void vfs_die (char *m) { message_1s (1, "Internal error:", m); exit (1); } #ifndef VFS_STANDALONE char * vfs_get_password (char *msg) { return (char *) input_dialog (msg, _("Password:"), ""); } #endif