-/*
- Copyright (C) Andrew Tridgell 1996
- Copyright (C) Paul Mackerras 1996
-
- 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.
-*/
-
/*
- Utilities used in rsync
+ * Utility routines used in rsync.
+ *
+ * Copyright (C) 1996-2000 Andrew Tridgell
+ * Copyright (C) 1996 Paul Mackerras
+ * Copyright (C) 2001, 2002 Martin Pool <mbp@samba.org>
+ * Copyright (C) 2003-2009 Wayne Davison
+ *
+ * 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 3 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, visit the http://fsf.org website.
+ */
- tridge, June 1996
- */
#include "rsync.h"
-
-int num_waiting(int fd)
+#include "ifuncs.h"
+#include "itypes.h"
+#include "inums.h"
+
+extern int dry_run;
+extern int module_id;
+extern int modify_window;
+extern int relative_paths;
+extern int preserve_xattrs;
+extern char *module_dir;
+extern unsigned int module_dirlen;
+extern mode_t orig_umask;
+extern char *partial_dir;
+extern filter_rule_list daemon_filter_list;
+
+int sanitize_paths = 0;
+
+char curr_dir[MAXPATHLEN];
+unsigned int curr_dir_len;
+int curr_dir_depth; /* This is only set for a sanitizing daemon. */
+
+/* Set a fd into nonblocking mode. */
+void set_nonblocking(int fd)
{
- int len=0;
- ioctl(fd,FIONREAD,&len);
- return(len);
-}
-
-
-struct map_struct *map_file(int fd,off_t len)
-{
- struct map_struct *ret;
- ret = (struct map_struct *)malloc(sizeof(*ret));
- if (!ret) out_of_memory("map_file");
-
- ret->map = NULL;
- ret->fd = fd;
- ret->size = len;
- ret->p = NULL;
- ret->p_size = 0;
- ret->p_offset = 0;
- ret->p_len = 0;
+ int val;
-#ifdef HAVE_MMAP
- if (len < MAX_MAP_SIZE)
- ret->map = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
-#endif
- return ret;
+ if ((val = fcntl(fd, F_GETFL)) == -1)
+ return;
+ if (!(val & NONBLOCK_FLAG)) {
+ val |= NONBLOCK_FLAG;
+ fcntl(fd, F_SETFL, val);
+ }
}
-
-char *map_ptr(struct map_struct *map,off_t offset,int len)
+/* Set a fd into blocking mode. */
+void set_blocking(int fd)
{
- int nread = -2;
-
- if (map->map)
- return map->map+offset;
-
- if (len == 0)
- return NULL;
-
- if (len > (map->size-offset))
- len = map->size-offset;
+ int val;
- if (offset >= map->p_offset &&
- offset+len <= map->p_offset+map->p_len) {
- return (map->p + (offset - map->p_offset));
- }
-
- len = MAX(len,CHUNK_SIZE);
- if (len > (map->size-offset))
- len = map->size-offset;
-
- if (len > map->p_size) {
- if (map->p) free(map->p);
- map->p = (char *)malloc(len);
- if (!map->p) out_of_memory("map_ptr");
- map->p_size = len;
- }
-
- if (lseek(map->fd,offset,SEEK_SET) != offset ||
- (nread=read(map->fd,map->p,len)) != len) {
- fprintf(FERROR,"EOF in map_ptr! (offset=%d len=%d nread=%d errno=%d)\n",
- (int)offset, len, nread, errno);
- exit_cleanup(1);
- }
-
- map->p_offset = offset;
- map->p_len = len;
-
- return map->p;
-}
-
-
-void unmap_file(struct map_struct *map)
-{
-#ifdef HAVE_MMAP
- if (map->map)
- munmap(map->map,map->size);
-#endif
- if (map->p) free(map->p);
- free(map);
+ if ((val = fcntl(fd, F_GETFL)) == -1)
+ return;
+ if (val & NONBLOCK_FLAG) {
+ val &= ~NONBLOCK_FLAG;
+ fcntl(fd, F_SETFL, val);
+ }
}
-
-/* this is taken from CVS */
-int piped_child(char **command,int *f_in,int *f_out)
+/**
+ * Create a file descriptor pair - like pipe() but use socketpair if
+ * possible (because of blocking issues on pipes).
+ *
+ * Always set non-blocking.
+ */
+int fd_pair(int fd[2])
{
- int pid;
- int to_child_pipe[2];
- int from_child_pipe[2];
+ int ret;
- if (pipe(to_child_pipe) < 0 ||
- pipe(from_child_pipe) < 0) {
- fprintf(FERROR,"pipe: %s\n",strerror(errno));
- exit_cleanup(1);
- }
-
-
- pid = do_fork();
- if (pid < 0) {
- fprintf(FERROR,"fork: %s\n",strerror(errno));
- exit_cleanup(1);
- }
-
- if (pid == 0)
- {
- extern int orig_umask;
- if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 ||
- close(to_child_pipe[1]) < 0 ||
- close(from_child_pipe[0]) < 0 ||
- dup2(from_child_pipe[1], STDOUT_FILENO) < 0) {
- fprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno));
- exit_cleanup(1);
- }
- if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]);
- if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]);
- umask(orig_umask);
- execvp(command[0], command);
- fprintf(FERROR,"Failed to exec %s : %s\n",
- command[0],strerror(errno));
- exit_cleanup(1);
- }
+#ifdef HAVE_SOCKETPAIR
+ ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+#else
+ ret = pipe(fd);
+#endif
- if (close(from_child_pipe[1]) < 0 ||
- close(to_child_pipe[0]) < 0) {
- fprintf(FERROR,"Failed to close : %s\n",strerror(errno));
- exit_cleanup(1);
- }
+ if (ret == 0) {
+ set_nonblocking(fd[0]);
+ set_nonblocking(fd[1]);
+ }
- *f_in = from_child_pipe[0];
- *f_out = to_child_pipe[1];
-
- return pid;
+ return ret;
}
-int local_child(int argc, char **argv,int *f_in,int *f_out)
+void print_child_argv(const char *prefix, char **cmd)
{
- int pid;
- int to_child_pipe[2];
- int from_child_pipe[2];
-
- if (pipe(to_child_pipe) < 0 ||
- pipe(from_child_pipe) < 0) {
- fprintf(FERROR,"pipe: %s\n",strerror(errno));
- exit_cleanup(1);
- }
-
-
- pid = do_fork();
- if (pid < 0) {
- fprintf(FERROR,"fork: %s\n",strerror(errno));
- exit_cleanup(1);
- }
-
- if (pid == 0) {
- extern int am_sender;
- extern int am_server;
-
- am_sender = !am_sender;
- am_server = 1;
-
- if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 ||
- close(to_child_pipe[1]) < 0 ||
- close(from_child_pipe[0]) < 0 ||
- dup2(from_child_pipe[1], STDOUT_FILENO) < 0) {
- fprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno));
- exit_cleanup(1);
+ rprintf(FCLIENT, "%s ", prefix);
+ for (; *cmd; cmd++) {
+ /* Look for characters that ought to be quoted. This
+ * is not a great quoting algorithm, but it's
+ * sufficient for a log message. */
+ if (strspn(*cmd, "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+ "0123456789"
+ ",.-_=+@/") != strlen(*cmd)) {
+ rprintf(FCLIENT, "\"%s\" ", *cmd);
+ } else {
+ rprintf(FCLIENT, "%s ", *cmd);
}
- if (to_child_pipe[0] != STDIN_FILENO) close(to_child_pipe[0]);
- if (from_child_pipe[1] != STDOUT_FILENO) close(from_child_pipe[1]);
- start_server(argc, argv);
- }
-
- if (close(from_child_pipe[1]) < 0 ||
- close(to_child_pipe[0]) < 0) {
- fprintf(FERROR,"Failed to close : %s\n",strerror(errno));
- exit_cleanup(1);
}
-
- *f_in = from_child_pipe[0];
- *f_out = to_child_pipe[1];
-
- return pid;
+ rprintf(FCLIENT, "\n");
}
-
-
-void out_of_memory(char *str)
+NORETURN void out_of_memory(const char *str)
{
- fprintf(FERROR,"ERROR: out of memory in %s\n",str);
- exit_cleanup(1);
+ rprintf(FERROR, "ERROR: out of memory in %s [%s]\n", str, who_am_i());
+ exit_cleanup(RERR_MALLOC);
}
-void overflow(char *str)
+NORETURN void overflow_exit(const char *str)
{
- fprintf(FERROR,"ERROR: buffer overflow in %s\n",str);
- exit_cleanup(1);
+ rprintf(FERROR, "ERROR: buffer overflow in %s [%s]\n", str, who_am_i());
+ exit_cleanup(RERR_MALLOC);
}
+int set_modtime(const char *fname, time_t modtime, uint32 mod_nsec, mode_t mode)
+{
+#ifndef CAN_SET_SYMLINK_TIMES
+ if (S_ISLNK(mode))
+ return 1;
+#endif
+
+ if (DEBUG_GTE(TIME, 1)) {
+ rprintf(FINFO, "set modtime of %s to (%ld) %s",
+ fname, (long)modtime,
+ asctime(localtime(&modtime)));
+ }
+ if (dry_run)
+ return 0;
-int set_modtime(char *fname,time_t modtime)
-{
- extern int dry_run;
- if (dry_run) return 0;
{
-#ifdef HAVE_UTIMBUF
- struct utimbuf tbuf;
+#ifdef HAVE_UTIMENSAT
+ struct timespec t[2];
+ t[0].tv_sec = 0;
+ t[0].tv_nsec = UTIME_NOW;
+ t[1].tv_sec = modtime;
+ t[1].tv_nsec = mod_nsec;
+ if (utimensat(AT_FDCWD, fname, t, AT_SYMLINK_NOFOLLOW) < 0)
+ return S_ISLNK(mode) && errno == ENOSYS ? 1 : -1;
+ return 0;
+#elif defined HAVE_UTIMES || defined HAVE_LUTIMES
+ struct timeval t[2];
+ t[0].tv_sec = time(NULL);
+ t[0].tv_usec = 0;
+ t[1].tv_sec = modtime;
+ t[1].tv_usec = mod_nsec / 1000;
+# ifdef HAVE_LUTIMES
+ if (lutimes(fname, t) < 0)
+ return S_ISLNK(mode) && errno == ENOSYS ? 1 : -1;
+ return 0;
+# else
+ return utimes(fname, t);
+# endif
+#elif defined HAVE_STRUCT_UTIMBUF
+ struct utimbuf tbuf;
tbuf.actime = time(NULL);
tbuf.modtime = modtime;
return utime(fname,&tbuf);
-#elif defined(HAVE_UTIME)
+#elif defined HAVE_UTIME
time_t t[2];
t[0] = time(NULL);
t[1] = modtime;
return utime(fname,t);
#else
- struct timeval t[2];
- t[0].tv_sec = time(NULL);
- t[0].tv_usec = 0;
- t[1].tv_sec = modtime;
- t[1].tv_usec = 0;
- return utimes(fname,t);
+#error No file-time-modification routine found!
#endif
}
}
+/* This creates a new directory with default permissions. Since there
+ * might be some directory-default permissions affecting this, we can't
+ * force the permissions directly using the original umask and mkdir(). */
+int mkdir_defmode(char *fname)
+{
+ int ret;
+
+ umask(orig_umask);
+ ret = do_mkdir(fname, ACCESSPERMS);
+ umask(0);
+ return ret;
+}
-/****************************************************************************
-Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
-else
-if SYSV use O_NDELAY
-if BSD use FNDELAY
-****************************************************************************/
-int set_blocking(int fd, int set)
+/* Create any necessary directories in fname. Any missing directories are
+ * created with default permissions. Returns < 0 on error, or the number
+ * of directories created. */
+int make_path(char *fname, int flags)
{
- int val;
-#ifdef O_NONBLOCK
-#define FLAG_TO_SET O_NONBLOCK
-#else
-#ifdef SYSV
-#define FLAG_TO_SET O_NDELAY
-#else /* BSD */
-#define FLAG_TO_SET FNDELAY
-#endif
-#endif
+ char *end, *p;
+ int ret = 0;
- if((val = fcntl(fd, F_GETFL, 0)) == -1)
- return -1;
- if(set) /* Turn blocking on - ie. clear nonblock flag */
- val &= ~FLAG_TO_SET;
- else
- val |= FLAG_TO_SET;
- return fcntl( fd, F_SETFL, val);
-#undef FLAG_TO_SET
-}
-
-/****************************************************************************
-create any necessary directories in fname. Unfortunately we don't know
-what perms to give the directory when this is called so we need to rely
-on the umask
-****************************************************************************/
-int create_directory_path(char *fname)
-{
- extern int orig_umask;
- char *p;
+ if (flags & MKP_SKIP_SLASH) {
+ while (*fname == '/')
+ fname++;
+ }
- while (*fname == '/') fname++;
- while (strncmp(fname,"./",2)==0) fname += 2;
+ while (*fname == '.' && fname[1] == '/')
+ fname += 2;
+
+ if (flags & MKP_DROP_NAME) {
+ end = strrchr(fname, '/');
+ if (!end)
+ return 0;
+ *end = '\0';
+ } else
+ end = fname + strlen(fname);
+
+ umask(orig_umask); /* NOTE: don't return before setting this back to 0! */
+
+ /* Try to find an existing dir, starting from the deepest dir. */
+ for (p = end; ; ) {
+ if (do_mkdir(fname, ACCESSPERMS) == 0) {
+ ret++;
+ break;
+ }
+ if (errno != ENOENT) {
+ if (errno != EEXIST)
+ ret = -ret - 1;
+ break;
+ }
+ while (1) {
+ if (p == fname) {
+ ret = -ret - 1;
+ goto double_break;
+ }
+ if (*--p == '/') {
+ if (p == fname) {
+ ret = -ret - 1; /* impossible... */
+ goto double_break;
+ }
+ *p = '\0';
+ break;
+ }
+ }
+ }
+ double_break:
- p = fname;
- while ((p=strchr(p,'/'))) {
- *p = 0;
- mkdir(fname,0777 & ~orig_umask);
+ /* Make all the dirs that we didn't find on the way here. */
+ while (p != end) {
*p = '/';
- p++;
+ p += strlen(p);
+ if (ret < 0) /* Skip mkdir on error, but keep restoring the path. */
+ continue;
+ if (do_mkdir(fname, ACCESSPERMS) < 0)
+ ret = -ret - 1;
+ else
+ ret++;
}
- return 0;
-}
+ umask(0);
-/* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted.
- Return LEN upon success, write's (negative) error code otherwise.
+ if (flags & MKP_DROP_NAME)
+ *end = '/';
- derived from GNU C's cccp.c.
-*/
-int full_write(int desc, char *ptr, int len)
+ return ret;
+}
+
+/**
+ * Write @p len bytes at @p ptr to descriptor @p desc, retrying if
+ * interrupted.
+ *
+ * @retval len upon success
+ *
+ * @retval <0 write's (negative) error code
+ *
+ * Derived from GNU C's cccp.c.
+ */
+int full_write(int desc, const char *ptr, size_t len)
{
int total_written;
-
+
total_written = 0;
while (len > 0) {
- int written = write (desc, ptr, len);
+ int written = write(desc, ptr, len);
if (written < 0) {
-#ifdef EINTR
if (errno == EINTR)
continue;
-#endif
return written;
}
total_written += written;
return total_written;
}
-/* Read LEN bytes at PTR from descriptor DESC, retrying if interrupted.
- Return the actual number of bytes read, zero for EOF, or negative
- for an error.
-
- derived from GNU C's cccp.c. */
-int safe_read(int desc, char *ptr, int len)
+/**
+ * Read @p len bytes at @p ptr from descriptor @p desc, retrying if
+ * interrupted.
+ *
+ * @retval >0 the actual number of bytes read
+ *
+ * @retval 0 for EOF
+ *
+ * @retval <0 for an error.
+ *
+ * Derived from GNU C's cccp.c. */
+static int safe_read(int desc, char *ptr, size_t len)
{
int n_chars;
-
- if (len <= 0)
+
+ if (len == 0)
return len;
-
-#ifdef EINTR
+
do {
n_chars = read(desc, ptr, len);
} while (n_chars < 0 && errno == EINTR);
-#else
- n_chars = read(desc, ptr, len);
-#endif
-
+
return n_chars;
}
-
-/* copy a file - this is used in conjunction with the --temp-dir option */
-int copy_file(char *source, char *dest, mode_t mode)
+/* Copy a file. If ofd < 0, copy_file unlinks and opens the "dest" file.
+ * Otherwise, it just writes to and closes the provided file descriptor.
+ * In either case, if --xattrs are being preserved, the dest file will
+ * have its xattrs set from the source file.
+ *
+ * This is used in conjunction with the --temp-dir, --backup, and
+ * --copy-dest options. */
+int copy_file(const char *source, const char *dest, int ofd, mode_t mode)
{
int ifd;
- int ofd;
char buf[1024 * 8];
int len; /* Number of bytes read into `buf'. */
- ifd = open(source, O_RDONLY);
- if (ifd == -1) {
- fprintf(FERROR,"open %s: %s\n",
- source,strerror(errno));
- return -1;
- }
-
- if (do_unlink(dest) && errno != ENOENT) {
- fprintf(FERROR,"unlink %s: %s\n",
- dest,strerror(errno));
+ if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
+ int save_errno = errno;
+ rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
+ errno = save_errno;
return -1;
}
- ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode);
if (ofd < 0) {
- fprintf(FERROR,"open %s: %s\n",
- dest,strerror(errno));
- close(ifd);
- return -1;
+ if (robust_unlink(dest) && errno != ENOENT) {
+ int save_errno = errno;
+ rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
+ errno = save_errno;
+ return -1;
+ }
+
+ if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0) {
+ int save_errno = errno;
+ rsyserr(FERROR_XFER, save_errno, "open %s", full_fname(dest));
+ close(ifd);
+ errno = save_errno;
+ return -1;
+ }
}
- while ((len = safe_read(ifd, buf, sizeof(buf))) > 0) {
+ while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
if (full_write(ofd, buf, len) < 0) {
- fprintf(FERROR,"write %s: %s\n",
- dest,strerror(errno));
+ int save_errno = errno;
+ rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
close(ifd);
close(ofd);
+ errno = save_errno;
return -1;
}
}
- close(ifd);
- close(ofd);
-
if (len < 0) {
- fprintf(FERROR,"read %s: %s\n",
- source,strerror(errno));
+ int save_errno = errno;
+ rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
+ close(ifd);
+ close(ofd);
+ errno = save_errno;
return -1;
}
+ if (close(ifd) < 0) {
+ rsyserr(FWARNING, errno, "close failed on %s",
+ full_fname(source));
+ }
+
+ if (close(ofd) < 0) {
+ int save_errno = errno;
+ rsyserr(FERROR_XFER, errno, "close failed on %s",
+ full_fname(dest));
+ errno = save_errno;
+ return -1;
+ }
+
+#ifdef SUPPORT_XATTRS
+ if (preserve_xattrs)
+ copy_xattrs(source, dest);
+#endif
+
return 0;
}
-/* sleep for a while via select */
-void u_sleep(int usec)
+/* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */
+#define MAX_RENAMES_DIGITS 3
+#define MAX_RENAMES 1000
+
+/**
+ * Robust unlink: some OS'es (HPUX) refuse to unlink busy files, so
+ * rename to <path>/.rsyncNNN instead.
+ *
+ * Note that successive rsync runs will shuffle the filenames around a
+ * bit as long as the file is still busy; this is because this function
+ * does not know if the unlink call is due to a new file coming in, or
+ * --delete trying to remove old .rsyncNNN files, hence it renames it
+ * each time.
+ **/
+int robust_unlink(const char *fname)
{
- struct timeval tv;
+#ifndef ETXTBSY
+ return do_unlink(fname);
+#else
+ static int counter = 1;
+ int rc, pos, start;
+ char path[MAXPATHLEN];
+
+ rc = do_unlink(fname);
+ if (rc == 0 || errno != ETXTBSY)
+ return rc;
+
+ if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN)
+ pos = MAXPATHLEN - 1;
- tv.tv_sec = 0;
- tv.tv_usec = usec;
- select(0, NULL, NULL, NULL, &tv);
+ while (pos > 0 && path[pos-1] != '/')
+ pos--;
+ pos += strlcpy(path+pos, ".rsync", MAXPATHLEN-pos);
+
+ if (pos > (MAXPATHLEN-MAX_RENAMES_DIGITS-1)) {
+ errno = ETXTBSY;
+ return -1;
+ }
+
+ /* start where the last one left off to reduce chance of clashes */
+ start = counter;
+ do {
+ snprintf(&path[pos], MAX_RENAMES_DIGITS+1, "%03d", counter);
+ if (++counter >= MAX_RENAMES)
+ counter = 1;
+ } while ((rc = access(path, 0)) == 0 && counter != start);
+
+ if (INFO_GTE(MISC, 1)) {
+ rprintf(FWARNING, "renaming %s to %s because of text busy\n",
+ fname, path);
+ }
+
+ /* maybe we should return rename()'s exit status? Nah. */
+ if (do_rename(fname, path) != 0) {
+ errno = ETXTBSY;
+ return -1;
+ }
+ return 0;
+#endif
}
+/* Returns 0 on successful rename, 1 if we successfully copied the file
+ * across filesystems, -2 if copy_file() failed, and -1 on other errors.
+ * If partialptr is not NULL and we need to do a copy, copy the file into
+ * the active partial-dir instead of over the destination file. */
+int robust_rename(const char *from, const char *to, const char *partialptr,
+ int mode)
+{
+ int tries = 4;
+
+ while (tries--) {
+ if (do_rename(from, to) == 0)
+ return 0;
+
+ switch (errno) {
+#ifdef ETXTBSY
+ case ETXTBSY:
+ if (robust_unlink(to) != 0) {
+ errno = ETXTBSY;
+ return -1;
+ }
+ errno = ETXTBSY;
+ break;
+#endif
+ case EXDEV:
+ if (partialptr) {
+ if (!handle_partial_dir(partialptr,PDIR_CREATE))
+ return -2;
+ to = partialptr;
+ }
+ if (copy_file(from, to, -1, mode) != 0)
+ return -2;
+ do_unlink(from);
+ return 1;
+ default:
+ return -1;
+ }
+ }
+ return -1;
+}
static pid_t all_pids[10];
static int num_pids;
-/* fork and record the pid of the child */
+/** Fork and record the pid of the child. **/
pid_t do_fork(void)
{
pid_t newpid = fork();
-
- if (newpid) {
+
+ if (newpid != 0 && newpid != -1) {
all_pids[num_pids++] = newpid;
}
return newpid;
}
-/* kill all children */
+/**
+ * Kill all children.
+ *
+ * @todo It would be kind of nice to make sure that they are actually
+ * all our children before we kill them, because their pids may have
+ * been recycled by some other process. Perhaps when we wait for a
+ * child, we should remove it from this array. Alternatively we could
+ * perhaps use process groups, but I think that would not work on
+ * ancient Unix versions that don't support them.
+ **/
void kill_all(int sig)
{
int i;
- for (i=0;i<num_pids;i++) {
- if (all_pids[i] != getpid())
- kill(all_pids[i], sig);
+
+ for (i = 0; i < num_pids; i++) {
+ /* Let's just be a little careful where we
+ * point that gun, hey? See kill(2) for the
+ * magic caused by negative values. */
+ pid_t p = all_pids[i];
+
+ if (p == getpid())
+ continue;
+ if (p <= 0)
+ continue;
+
+ kill(p, sig);
+ }
+}
+
+/** Lock a byte range in a open file */
+int lock_range(int fd, int offset, int len)
+{
+ struct flock lock;
+
+ lock.l_type = F_WRLCK;
+ lock.l_whence = SEEK_SET;
+ lock.l_start = offset;
+ lock.l_len = len;
+ lock.l_pid = 0;
+
+ return fcntl(fd,F_SETLK,&lock) == 0;
+}
+
+#define ENSURE_MEMSPACE(buf, type, sz, req) \
+ if ((req) > sz && !(buf = realloc_array(buf, type, sz = MAX(sz * 2, req)))) \
+ out_of_memory("glob_expand")
+
+static inline void call_glob_match(const char *name, int len, int from_glob,
+ char *arg, int abpos, int fbpos);
+
+static struct glob_data {
+ char *arg_buf, *filt_buf, **argv;
+ int absize, fbsize, maxargs, argc;
+} glob;
+
+static void glob_match(char *arg, int abpos, int fbpos)
+{
+ int len;
+ char *slash;
+
+ while (*arg == '.' && arg[1] == '/') {
+ if (fbpos < 0) {
+ ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, glob.absize);
+ memcpy(glob.filt_buf, glob.arg_buf, abpos + 1);
+ fbpos = abpos;
+ }
+ ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + 3);
+ glob.arg_buf[abpos++] = *arg++;
+ glob.arg_buf[abpos++] = *arg++;
+ glob.arg_buf[abpos] = '\0';
+ }
+ if ((slash = strchr(arg, '/')) != NULL) {
+ *slash = '\0';
+ len = slash - arg;
+ } else
+ len = strlen(arg);
+ if (strpbrk(arg, "*?[")) {
+ struct dirent *di;
+ DIR *d;
+
+ if (!(d = opendir(abpos ? glob.arg_buf : ".")))
+ return;
+ while ((di = readdir(d)) != NULL) {
+ char *dname = d_name(di);
+ if (dname[0] == '.' && (dname[1] == '\0'
+ || (dname[1] == '.' && dname[2] == '\0')))
+ continue;
+ if (!wildmatch(arg, dname))
+ continue;
+ call_glob_match(dname, strlen(dname), 1,
+ slash ? arg + len + 1 : NULL,
+ abpos, fbpos);
+ }
+ closedir(d);
+ } else {
+ call_glob_match(arg, len, 0,
+ slash ? arg + len + 1 : NULL,
+ abpos, fbpos);
+ }
+ if (slash)
+ *slash = '/';
+}
+
+static inline void call_glob_match(const char *name, int len, int from_glob,
+ char *arg, int abpos, int fbpos)
+{
+ char *use_buf;
+
+ ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, abpos + len + 2);
+ memcpy(glob.arg_buf + abpos, name, len);
+ abpos += len;
+ glob.arg_buf[abpos] = '\0';
+
+ if (fbpos >= 0) {
+ ENSURE_MEMSPACE(glob.filt_buf, char, glob.fbsize, fbpos + len + 2);
+ memcpy(glob.filt_buf + fbpos, name, len);
+ fbpos += len;
+ glob.filt_buf[fbpos] = '\0';
+ use_buf = glob.filt_buf;
+ } else
+ use_buf = glob.arg_buf;
+
+ if (from_glob || (arg && len)) {
+ STRUCT_STAT st;
+ int is_dir;
+
+ if (do_stat(glob.arg_buf, &st) != 0)
+ return;
+ is_dir = S_ISDIR(st.st_mode) != 0;
+ if (arg && !is_dir)
+ return;
+
+ if (daemon_filter_list.head
+ && check_filter(&daemon_filter_list, FLOG, use_buf, is_dir) < 0)
+ return;
+ }
+
+ if (arg) {
+ glob.arg_buf[abpos++] = '/';
+ glob.arg_buf[abpos] = '\0';
+ if (fbpos >= 0) {
+ glob.filt_buf[fbpos++] = '/';
+ glob.filt_buf[fbpos] = '\0';
+ }
+ glob_match(arg, abpos, fbpos);
+ } else {
+ ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
+ if (!(glob.argv[glob.argc++] = strdup(glob.arg_buf)))
+ out_of_memory("glob_match");
+ }
+}
+
+/* This routine performs wild-card expansion of the pathname in "arg". Any
+ * daemon-excluded files/dirs will not be matched by the wildcards. Returns 0
+ * if a wild-card string is the only returned item (due to matching nothing). */
+int glob_expand(const char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
+{
+ int ret, save_argc;
+ char *s;
+
+ if (!arg) {
+ if (glob.filt_buf)
+ free(glob.filt_buf);
+ free(glob.arg_buf);
+ memset(&glob, 0, sizeof glob);
+ return -1;
+ }
+
+ if (sanitize_paths)
+ s = sanitize_path(NULL, arg, "", 0, SP_KEEP_DOT_DIRS);
+ else {
+ s = strdup(arg);
+ if (!s)
+ out_of_memory("glob_expand");
+ clean_fname(s, CFN_KEEP_DOT_DIRS
+ | CFN_KEEP_TRAILING_SLASH
+ | CFN_COLLAPSE_DOT_DOT_DIRS);
+ }
+
+ ENSURE_MEMSPACE(glob.arg_buf, char, glob.absize, MAXPATHLEN);
+ *glob.arg_buf = '\0';
+
+ glob.argc = save_argc = *argc_p;
+ glob.argv = *argv_p;
+ glob.maxargs = *maxargs_p;
+
+ ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, 100);
+
+ glob_match(s, 0, -1);
+
+ /* The arg didn't match anything, so add the failed arg to the list. */
+ if (glob.argc == save_argc) {
+ ENSURE_MEMSPACE(glob.argv, char *, glob.maxargs, glob.argc + 1);
+ glob.argv[glob.argc++] = s;
+ ret = 0;
+ } else {
+ free(s);
+ ret = 1;
+ }
+
+ *maxargs_p = glob.maxargs;
+ *argv_p = glob.argv;
+ *argc_p = glob.argc;
+
+ return ret;
+}
+
+/* This routine is only used in daemon mode. */
+void glob_expand_module(char *base1, char *arg, char ***argv_p, int *argc_p, int *maxargs_p)
+{
+ char *p, *s;
+ char *base = base1;
+ int base_len = strlen(base);
+
+ if (!arg || !*arg)
+ return;
+
+ if (strncmp(arg, base, base_len) == 0)
+ arg += base_len;
+
+ if (!(arg = strdup(arg)))
+ out_of_memory("glob_expand_module");
+
+ if (asprintf(&base," %s/", base1) <= 0)
+ out_of_memory("glob_expand_module");
+ base_len++;
+
+ for (s = arg; *s; s = p + base_len) {
+ if ((p = strstr(s, base)) != NULL)
+ *p = '\0'; /* split it at this point */
+ glob_expand(s, argv_p, argc_p, maxargs_p);
+ if (!p)
+ break;
+ }
+
+ free(arg);
+ free(base);
+}
+
+/**
+ * Convert a string to lower case
+ **/
+void strlower(char *s)
+{
+ while (*s) {
+ if (isUpper(s))
+ *s = toLower(s);
+ s++;
+ }
+}
+
+/* Join strings p1 & p2 into "dest" with a guaranteed '/' between them. (If
+ * p1 ends with a '/', no extra '/' is inserted.) Returns the length of both
+ * strings + 1 (if '/' was inserted), regardless of whether the null-terminated
+ * string fits into destsize. */
+size_t pathjoin(char *dest, size_t destsize, const char *p1, const char *p2)
+{
+ size_t len = strlcpy(dest, p1, destsize);
+ if (len < destsize - 1) {
+ if (!len || dest[len-1] != '/')
+ dest[len++] = '/';
+ if (len < destsize - 1)
+ len += strlcpy(dest + len, p2, destsize - len);
+ else {
+ dest[len] = '\0';
+ len += strlen(p2);
+ }
+ }
+ else
+ len += strlen(p2) + 1; /* Assume we'd insert a '/'. */
+ return len;
+}
+
+/* Join any number of strings together, putting them in "dest". The return
+ * value is the length of all the strings, regardless of whether the null-
+ * terminated whole fits in destsize. Your list of string pointers must end
+ * with a NULL to indicate the end of the list. */
+size_t stringjoin(char *dest, size_t destsize, ...)
+{
+ va_list ap;
+ size_t len, ret = 0;
+ const char *src;
+
+ va_start(ap, destsize);
+ while (1) {
+ if (!(src = va_arg(ap, const char *)))
+ break;
+ len = strlen(src);
+ ret += len;
+ if (destsize > 1) {
+ if (len >= destsize)
+ len = destsize - 1;
+ memcpy(dest, src, len);
+ destsize -= len;
+ dest += len;
+ }
+ }
+ *dest = '\0';
+ va_end(ap);
+
+ return ret;
+}
+
+int count_dir_elements(const char *p)
+{
+ int cnt = 0, new_component = 1;
+ while (*p) {
+ if (*p++ == '/')
+ new_component = (*p != '.' || (p[1] != '/' && p[1] != '\0'));
+ else if (new_component) {
+ new_component = 0;
+ cnt++;
+ }
+ }
+ return cnt;
+}
+
+/* Turns multiple adjacent slashes into a single slash (possible exception:
+ * the preserving of two leading slashes at the start), drops all leading or
+ * interior "." elements unless CFN_KEEP_DOT_DIRS is flagged. Will also drop
+ * a trailing '.' after a '/' if CFN_DROP_TRAILING_DOT_DIR is flagged, removes
+ * a trailing slash (perhaps after removing the aforementioned dot) unless
+ * CFN_KEEP_TRAILING_SLASH is flagged, and will also collapse ".." elements
+ * (except at the start) if CFN_COLLAPSE_DOT_DOT_DIRS is flagged. If the
+ * resulting name would be empty, returns ".". */
+unsigned int clean_fname(char *name, int flags)
+{
+ char *limit = name - 1, *t = name, *f = name;
+ int anchored;
+
+ if (!name)
+ return 0;
+
+ if ((anchored = *f == '/') != 0) {
+ *t++ = *f++;
+#ifdef __CYGWIN__
+ /* If there are exactly 2 slashes at the start, preserve
+ * them. Would break daemon excludes unless the paths are
+ * really treated differently, so used this sparingly. */
+ if (*f == '/' && f[1] != '/')
+ *t++ = *f++;
+#endif
+ } else if (flags & CFN_KEEP_DOT_DIRS && *f == '.' && f[1] == '/') {
+ *t++ = *f++;
+ *t++ = *f++;
+ }
+ while (*f) {
+ /* discard extra slashes */
+ if (*f == '/') {
+ f++;
+ continue;
+ }
+ if (*f == '.') {
+ /* discard interior "." dirs */
+ if (f[1] == '/' && !(flags & CFN_KEEP_DOT_DIRS)) {
+ f += 2;
+ continue;
+ }
+ if (f[1] == '\0' && flags & CFN_DROP_TRAILING_DOT_DIR)
+ break;
+ /* collapse ".." dirs */
+ if (flags & CFN_COLLAPSE_DOT_DOT_DIRS
+ && f[1] == '.' && (f[2] == '/' || !f[2])) {
+ char *s = t - 1;
+ if (s == name && anchored) {
+ f += 2;
+ continue;
+ }
+ while (s > limit && *--s != '/') {}
+ if (s != t - 1 && (s < name || *s == '/')) {
+ t = s + 1;
+ f += 2;
+ continue;
+ }
+ limit = t + 2;
+ }
+ }
+ while (*f && (*t++ = *f++) != '/') {}
+ }
+
+ if (t > name+anchored && t[-1] == '/' && !(flags & CFN_KEEP_TRAILING_SLASH))
+ t--;
+ if (t == name)
+ *t++ = '.';
+ *t = '\0';
+
+ return t - name;
+}
+
+/* Make path appear as if a chroot had occurred. This handles a leading
+ * "/" (either removing it or expanding it) and any leading or embedded
+ * ".." components that attempt to escape past the module's top dir.
+ *
+ * If dest is NULL, a buffer is allocated to hold the result. It is legal
+ * to call with the dest and the path (p) pointing to the same buffer, but
+ * rootdir will be ignored to avoid expansion of the string.
+ *
+ * The rootdir string contains a value to use in place of a leading slash.
+ * Specify NULL to get the default of "module_dir".
+ *
+ * The depth var is a count of how many '..'s to allow at the start of the
+ * path.
+ *
+ * We also clean the path in a manner similar to clean_fname() but with a
+ * few differences:
+ *
+ * Turns multiple adjacent slashes into a single slash, gets rid of "." dir
+ * elements (INCLUDING a trailing dot dir), PRESERVES a trailing slash, and
+ * ALWAYS collapses ".." elements (except for those at the start of the
+ * string up to "depth" deep). If the resulting name would be empty,
+ * change it into a ".". */
+char *sanitize_path(char *dest, const char *p, const char *rootdir, int depth,
+ int flags)
+{
+ char *start, *sanp;
+ int rlen = 0, drop_dot_dirs = !relative_paths || !(flags & SP_KEEP_DOT_DIRS);
+
+ if (dest != p) {
+ int plen = strlen(p);
+ if (*p == '/') {
+ if (!rootdir)
+ rootdir = module_dir;
+ rlen = strlen(rootdir);
+ depth = 0;
+ p++;
+ }
+ if (dest) {
+ if (rlen + plen + 1 >= MAXPATHLEN)
+ return NULL;
+ } else if (!(dest = new_array(char, rlen + plen + 1)))
+ out_of_memory("sanitize_path");
+ if (rlen) {
+ memcpy(dest, rootdir, rlen);
+ if (rlen > 1)
+ dest[rlen++] = '/';
+ }
+ }
+
+ if (drop_dot_dirs) {
+ while (*p == '.' && p[1] == '/')
+ p += 2;
+ }
+
+ start = sanp = dest + rlen;
+ /* This loop iterates once per filename component in p, pointing at
+ * the start of the name (past any prior slash) for each iteration. */
+ while (*p) {
+ /* discard leading or extra slashes */
+ if (*p == '/') {
+ p++;
+ continue;
+ }
+ if (drop_dot_dirs) {
+ if (*p == '.' && (p[1] == '/' || p[1] == '\0')) {
+ /* skip "." component */
+ p++;
+ continue;
+ }
+ }
+ if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) {
+ /* ".." component followed by slash or end */
+ if (depth <= 0 || sanp != start) {
+ p += 2;
+ if (sanp != start) {
+ /* back up sanp one level */
+ --sanp; /* now pointing at slash */
+ while (sanp > start && sanp[-1] != '/')
+ sanp--;
+ }
+ continue;
+ }
+ /* allow depth levels of .. at the beginning */
+ depth--;
+ /* move the virtual beginning to leave the .. alone */
+ start = sanp + 3;
+ }
+ /* copy one component through next slash */
+ while (*p && (*sanp++ = *p++) != '/') {}
+ }
+ if (sanp == dest) {
+ /* ended up with nothing, so put in "." component */
+ *sanp++ = '.';
+ }
+ *sanp = '\0';
+
+ return dest;
+}
+
+/* Like chdir(), but it keeps track of the current directory (in the
+ * global "curr_dir"), and ensures that the path size doesn't overflow.
+ * Also cleans the path using the clean_fname() function. */
+int change_dir(const char *dir, int set_path_only)
+{
+ static int initialised;
+ unsigned int len;
+
+ if (!initialised) {
+ initialised = 1;
+ if (getcwd(curr_dir, sizeof curr_dir - 1) == NULL) {
+ rsyserr(FERROR, errno, "getcwd()");
+ exit_cleanup(RERR_FILESELECT);
+ }
+ curr_dir_len = strlen(curr_dir);
+ }
+
+ if (!dir) /* this call was probably just to initialize */
+ return 0;
+
+ len = strlen(dir);
+ if (len == 1 && *dir == '.')
+ return 1;
+
+ if (*dir == '/') {
+ if (len >= sizeof curr_dir) {
+ errno = ENAMETOOLONG;
+ return 0;
+ }
+ if (!set_path_only && chdir(dir))
+ return 0;
+ memcpy(curr_dir, dir, len + 1);
+ } else {
+ if (curr_dir_len + 1 + len >= sizeof curr_dir) {
+ errno = ENAMETOOLONG;
+ return 0;
+ }
+ curr_dir[curr_dir_len] = '/';
+ memcpy(curr_dir + curr_dir_len + 1, dir, len + 1);
+
+ if (!set_path_only && chdir(curr_dir)) {
+ curr_dir[curr_dir_len] = '\0';
+ return 0;
+ }
+ }
+
+ curr_dir_len = clean_fname(curr_dir, CFN_COLLAPSE_DOT_DOT_DIRS);
+ if (sanitize_paths) {
+ if (module_dirlen > curr_dir_len)
+ module_dirlen = curr_dir_len;
+ curr_dir_depth = count_dir_elements(curr_dir + module_dirlen);
+ }
+
+ if (DEBUG_GTE(CHDIR, 1) && !set_path_only)
+ rprintf(FINFO, "[%s] change_dir(%s)\n", who_am_i(), curr_dir);
+
+ return 1;
+}
+
+/* This will make a relative path absolute and clean it up via clean_fname().
+ * Returns the string, which might be newly allocated, or NULL on error. */
+char *normalize_path(char *path, BOOL force_newbuf, unsigned int *len_ptr)
+{
+ unsigned int len;
+
+ if (*path != '/') { /* Make path absolute. */
+ int len = strlen(path);
+ if (curr_dir_len + 1 + len >= sizeof curr_dir)
+ return NULL;
+ curr_dir[curr_dir_len] = '/';
+ memcpy(curr_dir + curr_dir_len + 1, path, len + 1);
+ if (!(path = strdup(curr_dir)))
+ out_of_memory("normalize_path");
+ curr_dir[curr_dir_len] = '\0';
+ } else if (force_newbuf) {
+ if (!(path = strdup(path)))
+ out_of_memory("normalize_path");
+ }
+
+ len = clean_fname(path, CFN_COLLAPSE_DOT_DOT_DIRS | CFN_DROP_TRAILING_DOT_DIR);
+
+ if (len_ptr)
+ *len_ptr = len;
+
+ return path;
+}
+
+/**
+ * Return a quoted string with the full pathname of the indicated filename.
+ * The string " (in MODNAME)" may also be appended. The returned pointer
+ * remains valid until the next time full_fname() is called.
+ **/
+char *full_fname(const char *fn)
+{
+ static char *result = NULL;
+ char *m1, *m2, *m3;
+ char *p1, *p2;
+
+ if (result)
+ free(result);
+
+ if (*fn == '/')
+ p1 = p2 = "";
+ else {
+ p1 = curr_dir + module_dirlen;
+ for (p2 = p1; *p2 == '/'; p2++) {}
+ if (*p2)
+ p2 = "/";
+ }
+ if (module_id >= 0) {
+ m1 = " (in ";
+ m2 = lp_name(module_id);
+ m3 = ")";
+ } else
+ m1 = m2 = m3 = "";
+
+ if (asprintf(&result, "\"%s%s%s\"%s%s%s", p1, p2, fn, m1, m2, m3) <= 0)
+ out_of_memory("full_fname");
+
+ return result;
+}
+
+static char partial_fname[MAXPATHLEN];
+
+char *partial_dir_fname(const char *fname)
+{
+ char *t = partial_fname;
+ int sz = sizeof partial_fname;
+ const char *fn;
+
+ if ((fn = strrchr(fname, '/')) != NULL) {
+ fn++;
+ if (*partial_dir != '/') {
+ int len = fn - fname;
+ strncpy(t, fname, len); /* safe */
+ t += len;
+ sz -= len;
+ }
+ } else
+ fn = fname;
+ if ((int)pathjoin(t, sz, partial_dir, fn) >= sz)
+ return NULL;
+ if (daemon_filter_list.head) {
+ t = strrchr(partial_fname, '/');
+ *t = '\0';
+ if (check_filter(&daemon_filter_list, FLOG, partial_fname, 1) < 0)
+ return NULL;
+ *t = '/';
+ if (check_filter(&daemon_filter_list, FLOG, partial_fname, 0) < 0)
+ return NULL;
+ }
+
+ return partial_fname;
+}
+
+/* If no --partial-dir option was specified, we don't need to do anything
+ * (the partial-dir is essentially '.'), so just return success. */
+int handle_partial_dir(const char *fname, int create)
+{
+ char *fn, *dir;
+
+ if (fname != partial_fname)
+ return 1;
+ if (!create && *partial_dir == '/')
+ return 1;
+ if (!(fn = strrchr(partial_fname, '/')))
+ return 1;
+
+ *fn = '\0';
+ dir = partial_fname;
+ if (create) {
+ STRUCT_STAT st;
+ int statret = do_lstat(dir, &st);
+ if (statret == 0 && !S_ISDIR(st.st_mode)) {
+ if (do_unlink(dir) < 0) {
+ *fn = '/';
+ return 0;
+ }
+ statret = -1;
+ }
+ if (statret < 0 && do_mkdir(dir, 0700) < 0) {
+ *fn = '/';
+ return 0;
+ }
+ } else
+ do_rmdir(dir);
+ *fn = '/';
+
+ return 1;
+}
+
+/* Determine if a symlink points outside the current directory tree.
+ * This is considered "unsafe" because e.g. when mirroring somebody
+ * else's machine it might allow them to establish a symlink to
+ * /etc/passwd, and then read it through a web server.
+ *
+ * Returns 1 if unsafe, 0 if safe.
+ *
+ * Null symlinks and absolute symlinks are always unsafe.
+ *
+ * Basically here we are concerned with symlinks whose target contains
+ * "..", because this might cause us to walk back up out of the
+ * transferred directory. We are not allowed to go back up and
+ * reenter.
+ *
+ * "dest" is the target of the symlink in question.
+ *
+ * "src" is the top source directory currently applicable at the level
+ * of the referenced symlink. This is usually the symlink's full path
+ * (including its name), as referenced from the root of the transfer. */
+int unsafe_symlink(const char *dest, const char *src)
+{
+ const char *name, *slash;
+ int depth = 0;
+
+ /* all absolute and null symlinks are unsafe */
+ if (!dest || !*dest || *dest == '/')
+ return 1;
+
+ /* find out what our safety margin is */
+ for (name = src; (slash = strchr(name, '/')) != 0; name = slash+1) {
+ /* ".." segment starts the count over. "." segment is ignored. */
+ if (*name == '.' && (name[1] == '/' || (name[1] == '.' && name[2] == '/'))) {
+ if (name[1] == '.')
+ depth = 0;
+ } else
+ depth++;
+ while (slash[1] == '/') slash++; /* just in case src isn't clean */
+ }
+ if (*name == '.' && name[1] == '.' && name[2] == '\0')
+ depth = 0;
+
+ for (name = dest; (slash = strchr(name, '/')) != 0; name = slash+1) {
+ if (*name == '.' && (name[1] == '/' || (name[1] == '.' && name[2] == '/'))) {
+ if (name[1] == '.') {
+ /* if at any point we go outside the current directory
+ then stop - it is unsafe */
+ if (--depth < 0)
+ return 1;
+ }
+ } else
+ depth++;
+ while (slash[1] == '/') slash++;
+ }
+ if (*name == '.' && name[1] == '.' && name[2] == '\0')
+ depth--;
+
+ return depth < 0;
+}
+
+/* Return the date and time as a string. Some callers tweak returned buf. */
+char *timestring(time_t t)
+{
+ static char TimeBuf[200];
+ struct tm *tm = localtime(&t);
+ char *p;
+
+#ifdef HAVE_STRFTIME
+ strftime(TimeBuf, sizeof TimeBuf - 1, "%Y/%m/%d %H:%M:%S", tm);
+#else
+ strlcpy(TimeBuf, asctime(tm), sizeof TimeBuf);
+#endif
+
+ if ((p = strchr(TimeBuf, '\n')) != NULL)
+ *p = '\0';
+
+ return TimeBuf;
+}
+
+/**
+ * Sleep for a specified number of milliseconds.
+ *
+ * Always returns TRUE. (In the future it might return FALSE if
+ * interrupted.)
+ **/
+int msleep(int t)
+{
+ int tdiff = 0;
+ struct timeval tval, t1, t2;
+
+ gettimeofday(&t1, NULL);
+
+ while (tdiff < t) {
+ tval.tv_sec = (t-tdiff)/1000;
+ tval.tv_usec = 1000*((t-tdiff)%1000);
+
+ errno = 0;
+ select(0,NULL,NULL, NULL, &tval);
+
+ gettimeofday(&t2, NULL);
+ tdiff = (t2.tv_sec - t1.tv_sec)*1000 +
+ (t2.tv_usec - t1.tv_usec)/1000;
+ }
+
+ return True;
+}
+
+/* Determine if two time_t values are equivalent (either exact, or in
+ * the modification timestamp window established by --modify-window).
+ *
+ * @retval 0 if the times should be treated as the same
+ *
+ * @retval +1 if the first is later
+ *
+ * @retval -1 if the 2nd is later
+ **/
+int cmp_time(time_t file1, time_t file2)
+{
+ if (file2 > file1) {
+ if (file2 - file1 <= modify_window)
+ return 0;
+ return -1;
+ }
+ if (file1 - file2 <= modify_window)
+ return 0;
+ return 1;
+}
+
+
+#ifdef __INSURE__XX
+#include <dlfcn.h>
+
+/**
+ This routine is a trick to immediately catch errors when debugging
+ with insure. A xterm with a gdb is popped up when insure catches
+ a error. It is Linux specific.
+**/
+int _Insure_trap_error(int a1, int a2, int a3, int a4, int a5, int a6)
+{
+ static int (*fn)();
+ int ret;
+ char *cmd;
+
+ asprintf(&cmd, "/usr/X11R6/bin/xterm -display :0 -T Panic -n Panic -e /bin/sh -c 'cat /tmp/ierrs.*.%d ; gdb /proc/%d/exe %d'",
+ getpid(), getpid(), getpid());
+
+ if (!fn) {
+ static void *h;
+ h = dlopen("/usr/local/parasoft/insure++lite/lib.linux2/libinsure.so", RTLD_LAZY);
+ fn = dlsym(h, "_Insure_trap_error");
+ }
+
+ ret = fn(a1, a2, a3, a4, a5, a6);
+
+ system(cmd);
+
+ free(cmd);
+
+ return ret;
+}
+#endif
+
+#define MALLOC_MAX 0x40000000
+
+void *_new_array(unsigned long num, unsigned int size, int use_calloc)
+{
+ if (num >= MALLOC_MAX/size)
+ return NULL;
+ return use_calloc ? calloc(num, size) : malloc(num * size);
+}
+
+void *_realloc_array(void *ptr, unsigned int size, size_t num)
+{
+ if (num >= MALLOC_MAX/size)
+ return NULL;
+ if (!ptr)
+ return malloc(size * num);
+ return realloc(ptr, size * num);
+}
+
+/* Take a filename and filename length and return the most significant
+ * filename suffix we can find. This ignores suffixes such as "~",
+ * ".bak", ".orig", ".~1~", etc. */
+const char *find_filename_suffix(const char *fn, int fn_len, int *len_ptr)
+{
+ const char *suf, *s;
+ BOOL had_tilde;
+ int s_len;
+
+ /* One or more dots at the start aren't a suffix. */
+ while (fn_len && *fn == '.') fn++, fn_len--;
+
+ /* Ignore the ~ in a "foo~" filename. */
+ if (fn_len > 1 && fn[fn_len-1] == '~')
+ fn_len--, had_tilde = True;
+ else
+ had_tilde = False;
+
+ /* Assume we don't find an suffix. */
+ suf = "";
+ *len_ptr = 0;
+
+ /* Find the last significant suffix. */
+ for (s = fn + fn_len; fn_len > 1; ) {
+ while (*--s != '.' && s != fn) {}
+ if (s == fn)
+ break;
+ s_len = fn_len - (s - fn);
+ fn_len = s - fn;
+ if (s_len == 4) {
+ if (strcmp(s+1, "bak") == 0
+ || strcmp(s+1, "old") == 0)
+ continue;
+ } else if (s_len == 5) {
+ if (strcmp(s+1, "orig") == 0)
+ continue;
+ } else if (s_len > 2 && had_tilde
+ && s[1] == '~' && isDigit(s + 2))
+ continue;
+ *len_ptr = s_len;
+ suf = s;
+ if (s_len == 1)
+ break;
+ /* Determine if the suffix is all digits. */
+ for (s++, s_len--; s_len > 0; s++, s_len--) {
+ if (!isDigit(s))
+ return suf;
+ }
+ /* An all-digit suffix may not be that signficant. */
+ s = suf;
+ }
+
+ return suf;
+}
+
+/* This is an implementation of the Levenshtein distance algorithm. It
+ * was implemented to avoid needing a two-dimensional matrix (to save
+ * memory). It was also tweaked to try to factor in the ASCII distance
+ * between changed characters as a minor distance quantity. The normal
+ * Levenshtein units of distance (each signifying a single change between
+ * the two strings) are defined as a "UNIT". */
+
+#define UNIT (1 << 16)
+
+uint32 fuzzy_distance(const char *s1, int len1, const char *s2, int len2)
+{
+ uint32 a[MAXPATHLEN], diag, above, left, diag_inc, above_inc, left_inc;
+ int32 cost;
+ int i1, i2;
+
+ if (!len1 || !len2) {
+ if (!len1) {
+ s1 = s2;
+ len1 = len2;
+ }
+ for (i1 = 0, cost = 0; i1 < len1; i1++)
+ cost += s1[i1];
+ return (int32)len1 * UNIT + cost;
+ }
+
+ for (i2 = 0; i2 < len2; i2++)
+ a[i2] = (i2+1) * UNIT;
+
+ for (i1 = 0; i1 < len1; i1++) {
+ diag = i1 * UNIT;
+ above = (i1+1) * UNIT;
+ for (i2 = 0; i2 < len2; i2++) {
+ left = a[i2];
+ if ((cost = *((uchar*)s1+i1) - *((uchar*)s2+i2)) != 0) {
+ if (cost < 0)
+ cost = UNIT - cost;
+ else
+ cost = UNIT + cost;
+ }
+ diag_inc = diag + cost;
+ left_inc = left + UNIT + *((uchar*)s1+i1);
+ above_inc = above + UNIT + *((uchar*)s2+i2);
+ a[i2] = above = left < above
+ ? (left_inc < diag_inc ? left_inc : diag_inc)
+ : (above_inc < diag_inc ? above_inc : diag_inc);
+ diag = left;
+ }
+ }
+
+ return a[len2-1];
+}
+
+#define BB_SLOT_SIZE (16*1024) /* Desired size in bytes */
+#define BB_PER_SLOT_BITS (BB_SLOT_SIZE * 8) /* Number of bits per slot */
+#define BB_PER_SLOT_INTS (BB_SLOT_SIZE / 4) /* Number of int32s per slot */
+
+struct bitbag {
+ uint32 **bits;
+ int slot_cnt;
+};
+
+struct bitbag *bitbag_create(int max_ndx)
+{
+ struct bitbag *bb = new(struct bitbag);
+ bb->slot_cnt = (max_ndx + BB_PER_SLOT_BITS - 1) / BB_PER_SLOT_BITS;
+
+ if (!(bb->bits = (uint32**)calloc(bb->slot_cnt, sizeof (uint32*))))
+ out_of_memory("bitbag_create");
+
+ return bb;
+}
+
+void bitbag_set_bit(struct bitbag *bb, int ndx)
+{
+ int slot = ndx / BB_PER_SLOT_BITS;
+ ndx %= BB_PER_SLOT_BITS;
+
+ if (!bb->bits[slot]) {
+ if (!(bb->bits[slot] = (uint32*)calloc(BB_PER_SLOT_INTS, 4)))
+ out_of_memory("bitbag_set_bit");
+ }
+
+ bb->bits[slot][ndx/32] |= 1u << (ndx % 32);
+}
+
+#if 0 /* not needed yet */
+void bitbag_clear_bit(struct bitbag *bb, int ndx)
+{
+ int slot = ndx / BB_PER_SLOT_BITS;
+ ndx %= BB_PER_SLOT_BITS;
+
+ if (!bb->bits[slot])
+ return;
+
+ bb->bits[slot][ndx/32] &= ~(1u << (ndx % 32));
+}
+
+int bitbag_check_bit(struct bitbag *bb, int ndx)
+{
+ int slot = ndx / BB_PER_SLOT_BITS;
+ ndx %= BB_PER_SLOT_BITS;
+
+ if (!bb->bits[slot])
+ return 0;
+
+ return bb->bits[slot][ndx/32] & (1u << (ndx % 32)) ? 1 : 0;
+}
+#endif
+
+/* Call this with -1 to start checking from 0. Returns -1 at the end. */
+int bitbag_next_bit(struct bitbag *bb, int after)
+{
+ uint32 bits, mask;
+ int i, ndx = after + 1;
+ int slot = ndx / BB_PER_SLOT_BITS;
+ ndx %= BB_PER_SLOT_BITS;
+
+ mask = (1u << (ndx % 32)) - 1;
+ for (i = ndx / 32; slot < bb->slot_cnt; slot++, i = mask = 0) {
+ if (!bb->bits[slot])
+ continue;
+ for ( ; i < BB_PER_SLOT_INTS; i++, mask = 0) {
+ if (!(bits = bb->bits[slot][i] & ~mask))
+ continue;
+ /* The xor magic figures out the lowest enabled bit in
+ * bits, and the switch quickly computes log2(bit). */
+ switch (bits ^ (bits & (bits-1))) {
+#define LOG2(n) case 1u << n: return slot*BB_PER_SLOT_BITS + i*32 + n
+ LOG2(0); LOG2(1); LOG2(2); LOG2(3);
+ LOG2(4); LOG2(5); LOG2(6); LOG2(7);
+ LOG2(8); LOG2(9); LOG2(10); LOG2(11);
+ LOG2(12); LOG2(13); LOG2(14); LOG2(15);
+ LOG2(16); LOG2(17); LOG2(18); LOG2(19);
+ LOG2(20); LOG2(21); LOG2(22); LOG2(23);
+ LOG2(24); LOG2(25); LOG2(26); LOG2(27);
+ LOG2(28); LOG2(29); LOG2(30); LOG2(31);
+ }
+ return -1; /* impossible... */
+ }
+ }
+
+ return -1;
+}
+
+void flist_ndx_push(flist_ndx_list *lp, int ndx)
+{
+ struct flist_ndx_item *item;
+
+ if (!(item = new(struct flist_ndx_item)))
+ out_of_memory("flist_ndx_push");
+ item->next = NULL;
+ item->ndx = ndx;
+ if (lp->tail)
+ lp->tail->next = item;
+ else
+ lp->head = item;
+ lp->tail = item;
+}
+
+int flist_ndx_pop(flist_ndx_list *lp)
+{
+ struct flist_ndx_item *next;
+ int ndx;
+
+ if (!lp->head)
+ return -1;
+
+ ndx = lp->head->ndx;
+ next = lp->head->next;
+ free(lp->head);
+ lp->head = next;
+ if (!next)
+ lp->tail = NULL;
+
+ return ndx;
+}
+
+void *expand_item_list(item_list *lp, size_t item_size,
+ const char *desc, int incr)
+{
+ /* First time through, 0 <= 0, so list is expanded. */
+ if (lp->malloced <= lp->count) {
+ void *new_ptr;
+ size_t new_size = lp->malloced;
+ if (incr < 0)
+ new_size += -incr; /* increase slowly */
+ else if (new_size < (size_t)incr)
+ new_size += incr;
+ else
+ new_size *= 2;
+ if (new_size < lp->malloced)
+ overflow_exit("expand_item_list");
+ /* Using _realloc_array() lets us pass the size, not a type. */
+ new_ptr = _realloc_array(lp->items, item_size, new_size);
+ if (DEBUG_GTE(FLIST, 3)) {
+ rprintf(FINFO, "[%s] expand %s to %s bytes, did%s move\n",
+ who_am_i(), desc, big_num(new_size * item_size),
+ new_ptr == lp->items ? " not" : "");
+ }
+ if (!new_ptr)
+ out_of_memory("expand_item_list");
+
+ lp->items = new_ptr;
+ lp->malloced = new_size;
}
+ return (char*)lp->items + (lp->count++ * item_size);
}