-/*
- 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
-
- tridge, June 1996
- */
-#include "rsync.h"
+/* -*- c-file-style: "linux" -*-
+ *
+ * Copyright (C) 1996-2000 by Andrew Tridgell
+ * Copyright (C) Paul Mackerras 1996
+ * Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
+ *
+ * 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.
+ */
+
+/**
+ * @file
+ *
+ * Utilities used in rsync
+ **/
-static int total_written = 0;
-static int total_read = 0;
+#include "rsync.h"
extern int verbose;
+extern struct exclude_list_struct server_exclude_list;
+
+int sanitize_paths = 0;
+
+
-int write_total(void)
+/**
+ * Set a fd into nonblocking mode
+ **/
+void set_nonblocking(int fd)
{
- return total_written;
+ int val;
+
+ if ((val = fcntl(fd, F_GETFL, 0)) == -1)
+ return;
+ if (!(val & NONBLOCK_FLAG)) {
+ val |= NONBLOCK_FLAG;
+ fcntl(fd, F_SETFL, val);
+ }
+}
+
+/**
+ * Set a fd into blocking mode
+ **/
+void set_blocking(int fd)
+{
+ int val;
+
+ if ((val = fcntl(fd, F_GETFL, 0)) == -1)
+ return;
+ if (val & NONBLOCK_FLAG) {
+ val &= ~NONBLOCK_FLAG;
+ fcntl(fd, F_SETFL, val);
+ }
}
-int read_total(void)
+
+/**
+ * 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])
{
- return total_read;
+ int ret;
+
+#if HAVE_SOCKETPAIR
+ ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
+#else
+ ret = pipe(fd);
+#endif
+
+ if (ret == 0) {
+ set_nonblocking(fd[0]);
+ set_nonblocking(fd[1]);
+ }
+
+ return ret;
}
-void write_int(int f,int x)
+
+void print_child_argv(char **cmd)
{
- char b[4];
- SIVAL(b,0,x);
- if (write(f,b,4) != 4) {
- fprintf(stderr,"write_int failed : %s\n",strerror(errno));
- exit(1);
- }
- total_written += 4;
+ rprintf(FINFO, "opening connection using ");
+ 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(FINFO, "\"%s\" ", *cmd);
+ } else {
+ rprintf(FINFO, "%s ", *cmd);
+ }
+ }
+ rprintf(FINFO, "\n");
}
-void write_buf(int f,char *buf,int len)
+
+void out_of_memory(char *str)
{
- if (write(f,buf,len) != len) {
- fprintf(stderr,"write_buf failed : %s\n",strerror(errno));
- exit(1);
- }
- total_written += len;
+ rprintf(FERROR, "ERROR: out of memory in %s\n", str);
+ exit_cleanup(RERR_MALLOC);
}
-void write_flush(int f)
+void overflow(char *str)
{
+ rprintf(FERROR, "ERROR: buffer overflow in %s\n", str);
+ exit_cleanup(RERR_MALLOC);
}
-int readfd(int fd,char *buffer,int N)
+
+int set_modtime(char *fname, time_t modtime)
{
- int ret;
- int total=0;
-
- while (total < N)
- {
- ret = read(fd,buffer + total,N - total);
+ extern int dry_run;
+ if (dry_run)
+ return 0;
- if (ret <= 0)
- return total;
- total += ret;
- }
- return total;
+ if (verbose > 2) {
+ rprintf(FINFO, "set modtime of %s to (%ld) %s",
+ fname, (long) modtime,
+ asctime(localtime(&modtime)));
+ }
+
+ {
+#ifdef HAVE_UTIMBUF
+ struct utimbuf tbuf;
+ tbuf.actime = time(NULL);
+ tbuf.modtime = modtime;
+ return utime(fname,&tbuf);
+#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);
+#endif
+ }
}
-int read_int(int f)
+/**
+ 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, int base_umask)
{
- char b[4];
- if (readfd(f,b,4) != 4) {
- if (verbose > 1)
- fprintf(stderr,"Error reading %d bytes : %s\n",4,strerror(errno));
- exit(1);
- }
- total_read += 4;
- return IVAL(b,0);
+ char *p;
+
+ while (*fname == '/')
+ fname++;
+ while (strncmp(fname, "./", 2) == 0)
+ fname += 2;
+
+ p = fname;
+ while ((p = strchr(p,'/')) != NULL) {
+ *p = 0;
+ do_mkdir(fname, 0777 & ~base_umask);
+ *p = '/';
+ p++;
+ }
+ return 0;
}
-void read_buf(int f,char *buf,int len)
+
+/**
+ * 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.
+ */
+static int full_write(int desc, char *ptr, size_t len)
{
- if (readfd(f,buf,len) != len) {
- if (verbose > 1)
- fprintf(stderr,"Error reading %d bytes : %s\n",len,strerror(errno));
- exit(1);
- }
- total_read += len;
+ int total_written;
+
+ total_written = 0;
+ while (len > 0) {
+ int written = write(desc, ptr, len);
+ if (written < 0) {
+ if (errno == EINTR)
+ continue;
+ return written;
+ }
+ total_written += written;
+ ptr += written;
+ len -= written;
+ }
+ return total_written;
}
-char *map_file(int fd,off_t 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)
{
- char *ret = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
- return ret;
+ int n_chars;
+
+ if (len == 0)
+ return len;
+
+ do {
+ n_chars = read(desc, ptr, len);
+ } while (n_chars < 0 && errno == EINTR);
+
+ return n_chars;
}
-void unmap_file(char *buf,off_t len)
+
+/** Copy a file.
+ *
+ * This is used in conjunction with the --temp-dir option */
+int copy_file(char *source, char *dest, mode_t mode)
{
- if (len > 0)
- munmap(buf,len);
+ int ifd;
+ int ofd;
+ char buf[1024 * 8];
+ int len; /* Number of bytes read into `buf'. */
+
+ ifd = do_open(source, O_RDONLY, 0);
+ if (ifd == -1) {
+ rprintf(FERROR,"open %s: %s\n",
+ full_fname(source), strerror(errno));
+ return -1;
+ }
+
+ if (robust_unlink(dest) && errno != ENOENT) {
+ rprintf(FERROR,"unlink %s: %s\n",
+ full_fname(dest), strerror(errno));
+ return -1;
+ }
+
+ ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode);
+ if (ofd == -1) {
+ rprintf(FERROR,"open %s: %s\n",
+ full_fname(dest), strerror(errno));
+ close(ifd);
+ return -1;
+ }
+
+ while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
+ if (full_write(ofd, buf, len) < 0) {
+ rprintf(FERROR,"write %s: %s\n",
+ full_fname(dest), strerror(errno));
+ close(ifd);
+ close(ofd);
+ return -1;
+ }
+ }
+
+ if (close(ifd) < 0) {
+ rprintf(FINFO, "close failed on %s: %s\n",
+ full_fname(source), strerror(errno));
+ }
+
+ if (close(ofd) < 0) {
+ rprintf(FERROR, "close failed on %s: %s\n",
+ full_fname(dest), strerror(errno));
+ return -1;
+ }
+
+ if (len < 0) {
+ rprintf(FERROR,"read %s: %s\n",
+ full_fname(source), strerror(errno));
+ return -1;
+ }
+
+ return 0;
}
+/* MAX_RENAMES should be 10**MAX_RENAMES_DIGITS */
+#define MAX_RENAMES_DIGITS 3
+#define MAX_RENAMES 1000
-int read_write(int fd_in,int fd_out,int size)
+/**
+ * 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(char *fname)
{
- static char *buf=NULL;
- static int bufsize = WRITE_BLOCK_SIZE;
- int total=0;
-
- if (!buf) {
- buf = (char *)malloc(bufsize);
- if (!buf) out_of_memory("read_write");
- }
+#ifndef ETXTBSY
+ return do_unlink(fname);
+#else
+ static int counter = 1;
+ int rc, pos, start;
+ char path[MAXPATHLEN];
- while (total < size) {
- int n = MIN(size-total,bufsize);
- read_buf(fd_in,buf,n);
- if (write(fd_out,buf,n) != n)
- return total;
- total += n;
- }
- return total;
-}
+ rc = do_unlink(fname);
+ if (rc == 0 || errno != ETXTBSY)
+ return rc;
+
+ if ((pos = strlcpy(path, fname, MAXPATHLEN)) >= MAXPATHLEN)
+ pos = MAXPATHLEN - 1;
+
+ 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 {
+ sprintf(&path[pos], "%03d", counter);
+ if (++counter >= MAX_RENAMES)
+ counter = 1;
+ } while ((rc = access(path, 0)) == 0 && counter != start);
+
+ if (verbose > 0) {
+ rprintf(FINFO,"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
+}
-/* this is taken from CVS */
-int piped_child(char **command,int *f_in,int *f_out)
+/* Returns 0 on success, -1 on most errors, and -2 if we got an error
+ * trying to copy the file across file systems. */
+int robust_rename(char *from, char *to, int mode)
{
- int pid;
- int to_child_pipe[2];
- int from_child_pipe[2];
+ int tries = 4;
+
+ while (tries--) {
+ if (do_rename(from, to) == 0)
+ return 0;
+
+ switch (errno) {
+#ifdef ETXTBSY
+ case ETXTBSY:
+ if (robust_unlink(to) != 0)
+ return -1;
+ break;
+#endif
+ case EXDEV:
+ if (copy_file(from, to, mode) != 0)
+ return -2;
+ do_unlink(from);
+ return 0;
+ default:
+ return -1;
+ }
+ }
+ return -1;
+}
- if (pipe(to_child_pipe) < 0 ||
- pipe(from_child_pipe) < 0) {
- fprintf(stderr,"pipe: %s\n",strerror(errno));
- exit(1);
- }
+static pid_t all_pids[10];
+static int num_pids;
- pid = fork();
- if (pid < 0) {
- fprintf(stderr,"fork: %s\n",strerror(errno));
- exit(1);
- }
+/** Fork and record the pid of the child. **/
+pid_t do_fork(void)
+{
+ pid_t newpid = fork();
+
+ if (newpid != 0 && newpid != -1) {
+ all_pids[num_pids++] = newpid;
+ }
+ return newpid;
+}
- if (pid == 0)
- {
- 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(stderr,"Failed to dup/close : %s\n",strerror(errno));
- exit(1);
- }
- execvp(command[0], command);
- fprintf(stderr,"Failed to exec %s : %s\n",
- command[0],strerror(errno));
- exit(1);
- }
+/**
+ * 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++) {
+ /* 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 (close(from_child_pipe[1]) < 0 ||
- close(to_child_pipe[0]) < 0) {
- fprintf(stderr,"Failed to close : %s\n",strerror(errno));
- exit(1);
- }
+ if (p == getpid())
+ continue;
+ if (p <= 0)
+ continue;
- *f_in = from_child_pipe[0];
- *f_out = to_child_pipe[1];
-
- return pid;
+ kill(p, sig);
+ }
}
-void out_of_memory(char *str)
+/** Turn a user name into a uid */
+int name_to_uid(char *name, uid_t *uid)
{
- fprintf(stderr,"out of memory in %s\n",str);
- exit(1);
+ struct passwd *pass;
+ if (!name || !*name) return 0;
+ pass = getpwnam(name);
+ if (pass) {
+ *uid = pass->pw_uid;
+ return 1;
+ }
+ return 0;
}
+/** Turn a group name into a gid */
+int name_to_gid(char *name, gid_t *gid)
+{
+ struct group *grp;
+ if (!name || !*name) return 0;
+ grp = getgrnam(name);
+ if (grp) {
+ *gid = grp->gr_gid;
+ return 1;
+ }
+ return 0;
+}
+
+
+/** 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;
-#ifndef HAVE_STRDUP
- char *strdup(char *s)
+ return fcntl(fd,F_SETLK,&lock) == 0;
+}
+
+static int exclude_server_path(char *arg)
{
- int l = strlen(s) + 1;
- char *ret = (char *)malloc(l);
- if (ret)
- strcpy(ret,s);
- return ret;
+ char *s;
+
+ if (server_exclude_list.head) {
+ for (s = arg; (s = strchr(s, '/')) != NULL; ) {
+ *s = '\0';
+ if (check_exclude(&server_exclude_list, arg, 1) < 0) {
+ /* We must leave arg truncated! */
+ return 1;
+ }
+ *s++ = '/';
+ }
+ }
+ return 0;
}
+
+static void glob_expand_one(char *s, char **argv, int *argc, int maxargs)
+{
+#if !(defined(HAVE_GLOB) && defined(HAVE_GLOB_H))
+ if (!*s) s = ".";
+ s = argv[*argc] = strdup(s);
+ exclude_server_path(s);
+ (*argc)++;
+#else
+ extern int sanitize_paths;
+ glob_t globbuf;
+ int i;
+
+ if (!*s) s = ".";
+
+ s = argv[*argc] = strdup(s);
+ if (sanitize_paths) {
+ sanitize_path(s, NULL);
+ }
+
+ memset(&globbuf, 0, sizeof globbuf);
+ if (!exclude_server_path(s))
+ glob(s, 0, NULL, &globbuf);
+ if (globbuf.gl_pathc == 0) {
+ (*argc)++;
+ globfree(&globbuf);
+ return;
+ }
+ for (i = 0; i < maxargs - *argc && i < (int)globbuf.gl_pathc; i++) {
+ if (i == 0)
+ free(s);
+ argv[*argc + i] = strdup(globbuf.gl_pathv[i]);
+ if (!argv[*argc + i])
+ out_of_memory("glob_expand");
+ }
+ globfree(&globbuf);
+ *argc += i;
#endif
+}
+
+/* This routine is only used in daemon mode. */
+void glob_expand(char *base1, char **argv, int *argc, int maxargs)
+{
+ char *s = argv[*argc];
+ char *p, *q;
+ char *base = base1;
+ int base_len = strlen(base);
+
+ if (!s || !*s) return;
+
+ if (strncmp(s, base, base_len) == 0)
+ s += base_len;
+
+ s = strdup(s);
+ if (!s) out_of_memory("glob_expand");
+
+ if (asprintf(&base," %s/", base1) <= 0) out_of_memory("glob_expand");
+ base_len++;
+
+ q = s;
+ while ((p = strstr(q,base)) != NULL && *argc < maxargs) {
+ /* split it at this point */
+ *p = 0;
+ glob_expand_one(q, argv, argc, maxargs);
+ q = p + base_len;
+ }
+
+ if (*q && *argc < maxargs)
+ glob_expand_one(q, argv, argc, maxargs);
+ free(s);
+ free(base);
+}
-int set_modtime(char *fname,time_t modtime)
+/**
+ * Convert a string to lower case
+ **/
+void strlower(char *s)
{
-#ifdef HAVE_UTIME_H
- struct utimbuf tbuf;
- tbuf.actime = time(NULL);
- tbuf.modtime = modtime;
- return utime(fname,&tbuf);
-#elif defined(HAVE_UTIME)
- time_t t[2];
- t[0] = time(NULL);
- t[1] = modtime;
- return utime(fname,t);
+ while (*s) {
+ if (isupper(* (unsigned char *) s))
+ *s = tolower(* (unsigned char *) 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;
+}
+
+void clean_fname(char *name)
+{
+ char *p;
+ int l;
+ int modified = 1;
+
+ if (!name) return;
+
+ while (modified) {
+ modified = 0;
+
+ if ((p = strstr(name,"/./")) != NULL) {
+ modified = 1;
+ while (*p) {
+ p[0] = p[2];
+ p++;
+ }
+ }
+
+ if ((p = strstr(name,"//")) != NULL) {
+ modified = 1;
+ while (*p) {
+ p[0] = p[1];
+ p++;
+ }
+ }
+
+ if (strncmp(p = name, "./", 2) == 0) {
+ modified = 1;
+ do {
+ p[0] = p[2];
+ } while (*p++);
+ }
+
+ l = strlen(p = name);
+ if (l > 1 && p[l-1] == '/') {
+ modified = 1;
+ p[l-1] = 0;
+ }
+ }
+}
+
+/**
+ * Make path appear as if a chroot had occurred:
+ *
+ * @li 1. remove leading "/" (or replace with "." if at end)
+ *
+ * @li 2. remove leading ".." components (except those allowed by @p reldir)
+ *
+ * @li 3. delete any other "<dir>/.." (recursively)
+ *
+ * Can only shrink paths, so sanitizes in place.
+ *
+ * While we're at it, remove double slashes and "." components like
+ * clean_fname() does, but DON'T remove a trailing slash because that
+ * is sometimes significant on command line arguments.
+ *
+ * If @p reldir is non-null, it is a sanitized directory that the path will be
+ * relative to, so allow as many ".." at the beginning of the path as
+ * there are components in reldir. This is used for symbolic link targets.
+ * If reldir is non-null and the path began with "/", to be completely like
+ * a chroot we should add in depth levels of ".." at the beginning of the
+ * path, but that would blow the assumption that the path doesn't grow and
+ * it is not likely to end up being a valid symlink anyway, so just do
+ * the normal removal of the leading "/" instead.
+ *
+ * Contributed by Dave Dykstra <dwd@bell-labs.com>
+ */
+void sanitize_path(char *p, char *reldir)
+{
+ char *start, *sanp;
+ int depth = 0;
+ int allowdotdot = 0;
+
+ if (reldir) {
+ depth++;
+ while (*reldir) {
+ if (*reldir++ == '/') {
+ depth++;
+ }
+ }
+ }
+ start = p;
+ sanp = p;
+ while (*p == '/') {
+ /* remove leading slashes */
+ p++;
+ }
+ while (*p != '\0') {
+ /* this loop iterates once per filename component in p.
+ * both p (and sanp if the original had a slash) should
+ * always be left pointing after a slash
+ */
+ if (*p == '.' && (p[1] == '/' || p[1] == '\0')) {
+ /* skip "." component */
+ while (*++p == '/') {
+ /* skip following slashes */
+ ;
+ }
+ continue;
+ }
+ allowdotdot = 0;
+ if (*p == '.' && p[1] == '.' && (p[2] == '/' || p[2] == '\0')) {
+ /* ".." component followed by slash or end */
+ if (depth > 0 && sanp == start) {
+ /* allow depth levels of .. at the beginning */
+ --depth;
+ allowdotdot = 1;
+ } else {
+ p += 2;
+ if (*p == '/')
+ p++;
+ if (sanp != start) {
+ /* back up sanp one level */
+ --sanp; /* now pointing at slash */
+ while (sanp > start && sanp[-1] != '/') {
+ /* skip back up to slash */
+ sanp--;
+ }
+ }
+ continue;
+ }
+ }
+ while (1) {
+ /* copy one component through next slash */
+ *sanp++ = *p++;
+ if (*p == '\0' || p[-1] == '/') {
+ while (*p == '/') {
+ /* skip multiple slashes */
+ p++;
+ }
+ break;
+ }
+ }
+ if (allowdotdot) {
+ /* move the virtual beginning to leave the .. alone */
+ start = sanp;
+ }
+ }
+ if (sanp == start && !allowdotdot) {
+ /* ended up with nothing, so put in "." component */
+ /*
+ * note that the !allowdotdot doesn't prevent this from
+ * happening in all allowed ".." situations, but I didn't
+ * think it was worth putting in an extra variable to ensure
+ * it since an extra "." won't hurt in those situations.
+ */
+ *sanp++ = '.';
+ }
+ *sanp = '\0';
+}
+
+/* Works much like sanitize_path(), with these differences: (1) a new buffer
+ * is allocated for the sanitized path rather than modifying it in-place; (2)
+ * a leading slash gets transformed into the rootdir value (which can be empty
+ * or NULL if you just want the slash to get dropped); (3) no "reldir" can be
+ * specified. */
+char *alloc_sanitize_path(const char *path, const char *rootdir)
+{
+ char *buf;
+ int rlen, plen = strlen(path);
+
+ if (*path == '/' && rootdir) {
+ rlen = strlen(rootdir);
+ if (rlen == 1)
+ path++;
+ } else
+ rlen = 0;
+ if (!(buf = new_array(char, rlen + plen + 1)))
+ out_of_memory("alloc_sanitize_path");
+ if (rlen)
+ memcpy(buf, rootdir, rlen);
+ memcpy(buf + rlen, path, plen + 1);
+
+ if (rlen > 1)
+ rlen++;
+ sanitize_path(buf + rlen, NULL);
+ if (rlen && buf[rlen] == '.' && buf[rlen+1] == '\0') {
+ if (rlen > 1)
+ rlen--;
+ buf[rlen] = '\0';
+ }
+
+ return buf;
+}
+
+char curr_dir[MAXPATHLEN];
+unsigned int curr_dir_len;
+
+/**
+ * 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 push_dir(char *dir)
+{
+ static int initialised;
+ unsigned int len;
+
+ if (!initialised) {
+ initialised = 1;
+ getcwd(curr_dir, sizeof curr_dir - 1);
+ 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 == '/' ? len : curr_dir_len + 1 + len) >= sizeof curr_dir)
+ return 0;
+
+ if (chdir(dir))
+ return 0;
+
+ if (*dir == '/') {
+ memcpy(curr_dir, dir, len + 1);
+ curr_dir_len = len;
+ } else {
+ curr_dir[curr_dir_len++] = '/';
+ memcpy(curr_dir + curr_dir_len, dir, len + 1);
+ curr_dir_len += len;
+ }
+
+ clean_fname(curr_dir);
+
+ return 1;
+}
+
+/**
+ * Reverse a push_dir() call. You must pass in an absolute path
+ * that was copied from a prior value of "curr_dir".
+ **/
+int pop_dir(char *dir)
+{
+ if (chdir(dir))
+ return 0;
+
+ curr_dir_len = strlcpy(curr_dir, dir, sizeof curr_dir);
+ if (curr_dir_len >= sizeof curr_dir)
+ curr_dir_len = sizeof curr_dir - 1;
+
+ return 1;
+}
+
+/**
+ * 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(char *fn)
+{
+ extern int module_id;
+ static char *result = NULL;
+ char *m1, *m2, *m3;
+ char *p1, *p2;
+
+ if (result)
+ free(result);
+
+ if (*fn == '/')
+ p1 = p2 = "";
+ else {
+ p1 = curr_dir;
+ p2 = "/";
+ }
+ if (module_id >= 0) {
+ m1 = " (in ";
+ m2 = lp_name(module_id);
+ m3 = ")";
+ if (*p1) {
+ if (!lp_use_chroot(module_id)) {
+ char *p = lp_path(module_id);
+ if (*p != '/' || p[1])
+ p1 += strlen(p);
+ }
+ if (!*p1)
+ p2++;
+ else
+ p1++;
+ }
+ else
+ fn++;
+ } else
+ m1 = m2 = m3 = "";
+
+ asprintf(&result, "\"%s%s%s\"%s%s%s", p1, p2, fn, m1, m2, m3);
+
+ return result;
+}
+
+/** We need to supply our own strcmp function for file list comparisons
+ to ensure that signed/unsigned usage is consistent between machines. */
+int u_strcmp(const char *cs1, const char *cs2)
+{
+ const uchar *s1 = (const uchar *)cs1;
+ const uchar *s2 = (const uchar *)cs2;
+
+ while (*s1 && *s2 && (*s1 == *s2)) {
+ s1++; s2++;
+ }
+
+ return (int)*s1 - (int)*s2;
+}
+
+
+
+/**
+ * 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.
+ *
+ * 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.
+ *
+ * @param dest Target of the symlink in question.
+ *
+ * @param src Top source directory currently applicable. Basically this
+ * is the first parameter to rsync in a simple invocation, but it's
+ * modified by flist.c in slightly complex ways.
+ *
+ * @retval True if unsafe
+ * @retval False is unsafe
+ *
+ * @sa t_unsafe.c
+ **/
+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) {
+ if (strncmp(name, "../", 3) == 0) {
+ depth = 0;
+ } else if (strncmp(name, "./", 2) == 0) {
+ /* nothing */
+ } else {
+ depth++;
+ }
+ }
+ if (strcmp(name, "..") == 0)
+ depth = 0;
+
+ for (name = dest; (slash = strchr(name, '/')) != 0; name = slash+1) {
+ if (strncmp(name, "../", 3) == 0) {
+ /* if at any point we go outside the current directory
+ then stop - it is unsafe */
+ if (--depth < 0)
+ return 1;
+ } else if (strncmp(name, "./", 2) == 0) {
+ /* nothing */
+ } else {
+ depth++;
+ }
+ }
+ if (strcmp(name, "..") == 0)
+ depth--;
+
+ return (depth < 0);
+}
+
+
+/**
+ * Return the date and time as a string
+ **/
+char *timestring(time_t t)
+{
+ static char TimeBuf[200];
+ struct tm *tm = localtime(&t);
+
+#ifdef HAVE_STRFTIME
+ strftime(TimeBuf, sizeof TimeBuf - 1, "%Y/%m/%d %H:%M:%S", tm);
#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);
+ strlcpy(TimeBuf, asctime(tm), sizeof TimeBuf);
+#endif
+
+ if (TimeBuf[strlen(TimeBuf)-1] == '\n') {
+ TimeBuf[strlen(TimeBuf)-1] = 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);
+ gettimeofday(&t2, 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 file modification times 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_modtime(time_t file1, time_t file2)
+{
+ extern int modify_window;
+
+ 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 int size, unsigned long num)
+{
+ if (num >= MALLOC_MAX/size)
+ return NULL;
+ return malloc(size * num);
+}
+
+void *_realloc_array(void *ptr, unsigned int size, unsigned long num)
+{
+ if (num >= MALLOC_MAX/size)
+ return NULL;
+ /* No realloc should need this, but just in case... */
+ if (!ptr)
+ return malloc(size * num);
+ return realloc(ptr, size * num);
}
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff