/*
- * $Id: unix.c,v 1.9 2010-02-10 14:05:37 franklahm Exp $
- *
* Copyright (c) 1990,1993 Regents of The University of Michigan.
* All Rights Reserved. See COPYRIGHT.
- *
*/
#ifdef HAVE_CONFIG_H
#include <unistd.h>
#include <errno.h>
+#include <stdlib.h>
#include <sys/param.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <atalk/volume.h>
#include <atalk/logger.h>
#include <atalk/unix.h>
-
-/* -----------------------------
- a dropbox is a folder where w is set but not r eg:
- rwx-wx-wx or rwx-wx--
- rwx----wx (is not asked by a Mac with OS >= 8.0 ?)
-*/
-int stickydirmode(const char *name, const mode_t mode, const int dropbox, const mode_t v_umask)
-{
- int retval = 0;
-
-#ifdef DROPKLUDGE
- /* Turn on the sticky bit if this is a drop box, also turn off the setgid bit */
- if ((dropbox & AFPVOL_DROPBOX)) {
- int uid;
-
- if ( ( (mode & S_IWOTH) && !(mode & S_IROTH)) ||
- ( (mode & S_IWGRP) && !(mode & S_IRGRP)) )
- {
- uid=geteuid();
- if ( seteuid(0) < 0) {
- LOG(log_error, logtype_afpd, "stickydirmode: unable to seteuid root: %s", strerror(errno));
- }
- if ( (retval=chmod( name, ( (DIRBITS | mode | S_ISVTX) & ~v_umask) )) < 0) {
- LOG(log_error, logtype_afpd, "stickydirmode: chmod \"%s\": %s", fullpathname(name), strerror(errno) );
- } else {
- LOG(log_debug, logtype_afpd, "stickydirmode: chmod \"%s\": %s", fullpathname(name), strerror(retval) );
- }
- seteuid(uid);
- return retval;
- }
- }
-#endif /* DROPKLUDGE */
-
- /*
- * Ignore EPERM errors: We may be dealing with a directory that is
- * group writable, in which case chmod will fail.
- */
- if ( (chmod( name, (DIRBITS | mode) & ~v_umask ) < 0) && errno != EPERM &&
- !(errno == ENOENT && (dropbox & AFPVOL_NOADOUBLE)) )
- {
- LOG(log_error, logtype_afpd, "stickydirmode: chmod \"%s\": %s", fullpathname(name), strerror(errno) );
- retval = -1;
- }
-
- return retval;
-}
+#include <atalk/acl.h>
+#include <atalk/compat.h>
+#include <atalk/errchk.h>
+#include <atalk/ea.h>
/* ------------------------- */
int dir_rx_set(mode_t mode)
}
/* --------------------- */
-int setfilmode(const char * name, mode_t mode, struct stat *st, mode_t v_umask)
+int setfilmode(const struct vol *vol, const char *name, mode_t mode, struct stat *st)
{
struct stat sb;
mode_t mask = S_IRWXU | S_IRWXG | S_IRWXO; /* rwx for owner group and other, by default */
st = &sb;
}
- if (S_ISLNK(st->st_mode))
- return 0; /* we don't want to change link permissions */
-
mode |= st->st_mode & ~mask; /* keep other bits from previous mode */
- if ( chmod( name, mode & ~v_umask ) < 0 && errno != EPERM ) {
+ if (ochmod((char *)name, mode & ~vol->v_umask, st, vol_syml_opt(vol) | O_NETATALK_ACL) < 0 && errno != EPERM ) {
return -1;
}
return 0;
}
-/* -------------------
- system rmdir with afp error code.
-*/
-int netatalk_rmdir_all_errors(const char *name)
+/*
+ * @brief system rmdir with afp error code.
+ *
+ * Supports *at semantics (cf openat) if HAVE_ATFUNCS. Pass dirfd=-1 to ignore this.
+ */
+int netatalk_rmdir_all_errors(int dirfd, const char *name)
{
- if (rmdir(name) < 0) {
+ int err;
+
+#ifdef HAVE_ATFUNCS
+ if (dirfd == -1)
+ dirfd = AT_FDCWD;
+ err = unlinkat(dirfd, name, AT_REMOVEDIR);
+#else
+ err = rmdir(name);
+#endif
+
+ if (err < 0) {
switch ( errno ) {
case ENOENT :
return AFPERR_NOOBJ;
case ENOTEMPTY :
+ case EEXIST:
return AFPERR_DIRNEMPT;
case EPERM:
case EACCES :
return AFP_OK;
}
-/* -------------------
- system rmdir with afp error code.
- ENOENT is not an error.
-*/
-int netatalk_rmdir(const char *name)
+/*
+ * @brief System rmdir with afp error code, but ENOENT is not an error.
+ *
+ * Supports *at semantics (cf openat) if HAVE_ATFUNCS. Pass dirfd=-1 to ignore this.
+ */
+int netatalk_rmdir(int dirfd, const char *name)
{
- int ret = netatalk_rmdir_all_errors(name);
+ int ret = netatalk_rmdir_all_errors(dirfd, name);
if (ret == AFPERR_NOOBJ)
return AFP_OK;
return ret;
return AFP_OK;
}
-char *fullpathname(const char *name)
-{
- static char wd[ MAXPATHLEN + 1];
-
- if ( getcwd( wd , MAXPATHLEN) ) {
- strlcat(wd, "/", MAXPATHLEN);
- strlcat(wd, name, MAXPATHLEN);
- }
- else {
- strlcpy(wd, name, MAXPATHLEN);
- }
- return wd;
-}
+/**************************************************************************
+ * *at semnatics support functions (like openat, renameat standard funcs)
+ **************************************************************************/
-int copy_file(const char *src, const char *dst, mode_t mode)
+/* Copy all file data from one file fd to another */
+int copy_file_fd(int sfd, int dfd)
{
- int ret = 0;
- int sfd = -1;
- int dfd = -1;
+ EC_INIT;
ssize_t cc;
size_t buflen;
- char filebuf[8192];
-
- if ((sfd = open(src, O_RDONLY)) < 0) {
- LOG(log_error, logtype_afpd, "copy_file('%s'/'%s'): open '%s' error: %s",
- src, dst, src, strerror(errno));
- return -1;
- }
-
- if ((dfd = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
- LOG(log_error, logtype_afpd, "copy_file('%s'/'%s'): open '%s' error: %s",
- src, dst, dst, strerror(errno));
- ret = -1;
- goto exit;
- }
+ char filebuf[NETATALK_DIOSZ_STACK];
while ((cc = read(sfd, filebuf, sizeof(filebuf)))) {
if (cc < 0) {
if (errno == EINTR)
continue;
- LOG(log_error, logtype_afpd, "copy_file('%s'/'%s'): read '%s' error: %s",
- src, dst, src, strerror(errno));
- ret = -1;
- goto exit;
+ LOG(log_error, logtype_afpd, "copy_file_fd: %s", strerror(errno));
+ EC_FAIL;
}
buflen = cc;
if ((cc = write(dfd, filebuf, buflen)) < 0) {
if (errno == EINTR)
continue;
- LOG(log_error, logtype_afpd, "copy_file('%s'/'%s'): read '%s' error: %s",
- src, dst, dst, strerror(errno));
- ret = -1;
- goto exit;
+ LOG(log_error, logtype_afpd, "copy_file_fd: %s", strerror(errno));
+ EC_FAIL;
}
buflen -= cc;
}
}
+EC_CLEANUP:
+ EC_EXIT;
+}
+
+/*
+ * Supports *at semantics if HAVE_ATFUNCS, pass dirfd=-1 to ignore this
+ */
+int copy_file(int dirfd, const char *src, const char *dst, mode_t mode)
+{
+ int ret = 0;
+ int sfd = -1;
+ int dfd = -1;
+
+#ifdef HAVE_ATFUNCS
+ if (dirfd == -1)
+ dirfd = AT_FDCWD;
+ sfd = openat(dirfd, src, O_RDONLY);
+#else
+ sfd = open(src, O_RDONLY);
+#endif
+ if (sfd < 0) {
+ LOG(log_info, logtype_afpd, "copy_file('%s'/'%s'): open '%s' error: %s",
+ src, dst, src, strerror(errno));
+ return -1;
+ }
+
+ if ((dfd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, mode)) < 0) {
+ LOG(log_info, logtype_afpd, "copy_file('%s'/'%s'): open '%s' error: %s",
+ src, dst, dst, strerror(errno));
+ ret = -1;
+ goto exit;
+ }
+
+ ret = copy_file_fd(sfd, dfd);
+
exit:
if (sfd != -1)
close(sfd);
return ret;
}
-/* This is equivalent of unix rename(). */
-int unix_rename(const char *oldpath, const char *newpath)
+/*!
+ * Copy an EA from one file to another
+ *
+ * Supports *at semantics if HAVE_ATFUNCS, pass dirfd=-1 to ignore this
+ */
+int copy_ea(const char *ea, int dirfd, const char *src, const char *dst, mode_t mode)
+{
+ EC_INIT;
+ int sfd = -1;
+ int dfd = -1;
+ size_t easize;
+ char *eabuf = NULL;
+
+#ifdef HAVE_ATFUNCS
+ if (dirfd == -1)
+ dirfd = AT_FDCWD;
+ EC_NEG1_LOG( sfd = openat(dirfd, src, O_RDONLY) );
+#else
+ EC_NEG1_LOG( sfd = open(src, O_RDONLY) );
+#endif
+ EC_NEG1_LOG( dfd = open(dst, O_WRONLY, mode) );
+
+ if ((easize = sys_fgetxattr(sfd, ea, NULL, 0)) > 0) {
+ EC_NULL_LOG( eabuf = malloc(easize));
+ EC_NEG1_LOG( easize = sys_fgetxattr(sfd, ea, eabuf, easize) );
+ EC_NEG1_LOG( easize = sys_fsetxattr(dfd, ea, eabuf, easize, 0) );
+ }
+
+EC_CLEANUP:
+ if (sfd != -1)
+ close(sfd);
+ if (dfd != -1)
+ close(dfd);
+ free(eabuf);
+ EC_EXIT;
+}
+
+/*
+ * at wrapper for netatalk_unlink
+ */
+int netatalk_unlinkat(int dirfd, const char *name)
{
-#if 0
- char pd_name[PATH_MAX+1];
- int i;
- struct stat pd_stat;
- uid_t uid;
+#ifdef HAVE_ATFUNCS
+ if (dirfd == -1)
+ dirfd = AT_FDCWD;
+
+ if (unlinkat(dirfd, name, 0) < 0) {
+ switch (errno) {
+ case ENOENT :
+ break;
+ case EROFS:
+ return AFPERR_VLOCK;
+ case EPERM:
+ case EACCES :
+ return AFPERR_ACCESS;
+ default :
+ return AFPERR_PARAM;
+ }
+ }
+ return AFP_OK;
+#else
+ return netatalk_unlink(name);
#endif
+ /* DEADC0DE */
+ return 0;
+}
+
+/*
+ * @brief This is equivalent of unix rename()
+ *
+ * unix_rename mulitplexes rename and renameat. If we dont HAVE_ATFUNCS, sfd and dfd
+ * are ignored.
+ *
+ * @param sfd (r) if we HAVE_ATFUNCS, -1 gives AT_FDCWD
+ * @param oldpath (r) guess what
+ * @param dfd (r) same as sfd
+ * @param newpath (r) guess what
+ */
+int unix_rename(int sfd, const char *oldpath, int dfd, const char *newpath)
+{
+#ifdef HAVE_ATFUNCS
+ if (sfd == -1)
+ sfd = AT_FDCWD;
+ if (dfd == -1)
+ dfd = AT_FDCWD;
+
+ if (renameat(sfd, oldpath, dfd, newpath) < 0)
+ return -1;
+#else
if (rename(oldpath, newpath) < 0)
return -1;
-#if 0
- for (i = 0; i <= PATH_MAX && newpath[i] != '\0'; i++)
- pd_name[i] = newpath[i];
- pd_name[i] = '\0';
+#endif /* HAVE_ATFUNCS */
+
+ return 0;
+}
- while (i > 0 && pd_name[i] != '/') i--;
- if (pd_name[i] == '/') i++;
+/*
+ * @brief stat/fsstatat multiplexer
+ *
+ * statat mulitplexes stat and fstatat. If we dont HAVE_ATFUNCS, dirfd is ignored.
+ *
+ * @param dirfd (r) Only used if HAVE_ATFUNCS, ignored else, -1 gives AT_FDCWD
+ * @param path (r) pathname
+ * @param st (rw) pointer to struct stat
+ */
+int statat(int dirfd, const char *path, struct stat *st)
+{
+#ifdef HAVE_ATFUNCS
+ if (dirfd == -1)
+ dirfd = AT_FDCWD;
+ return (fstatat(dirfd, path, st, 0));
+#else
+ return (stat(path, st));
+#endif
+
+ /* DEADC0DE */
+ return -1;
+}
- pd_name[i++] = '.'; pd_name[i++] = '\0';
+/*
+ * @brief opendir wrapper for *at semantics support
+ *
+ * opendirat chdirs to dirfd if dirfd != -1 before calling opendir on path.
+ *
+ * @param dirfd (r) if != -1, chdir(dirfd) before opendir(path)
+ * @param path (r) pathname
+ */
+DIR *opendirat(int dirfd, const char *path)
+{
+ DIR *ret;
+ int cwd = -1;
- if (stat(pd_name, &pd_stat) < 0) {
- LOG(log_error, logtype_afpd, "stat() of parent dir failed: pd_name = %s, uid = %d: %s",
- pd_name, geteuid(), strerror(errno));
- return 0;
+ if (dirfd != -1) {
+ if (((cwd = open(".", O_RDONLY)) == -1) || (fchdir(dirfd) != 0)) {
+ ret = NULL;
+ goto exit;
+ }
}
- /* So we have SGID bit set... */
- if ((S_ISGID & pd_stat.st_mode) != 0) {
- uid = geteuid();
- if (seteuid(0) < 0)
- LOG(log_error, logtype_afpd, "seteuid() failed: %s", strerror(errno));
- if (recursive_chown(newpath, uid, pd_stat.st_gid) < 0)
- LOG(log_error, logtype_afpd, "chown() of parent dir failed: newpath=%s, uid=%d: %s",
- pd_name, geteuid(), strerror(errno));
- seteuid(uid);
+ ret = opendir(path);
+
+ if (dirfd != -1 && fchdir(cwd) != 0) {
+ LOG(log_error, logtype_afpd, "opendirat: cant chdir back. exit!");
+ exit(EXITERR_SYS);
}
-#endif
- return 0;
+
+exit:
+ if (cwd != -1)
+ close(cwd);
+
+ return ret;
}
projects / netatalk.git / blobdiff