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util.c
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/*
* 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) 2003-2008 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.
*/
#include "rsync.h"
#include "ifuncs.h"
extern int verbose;
extern int dry_run;
extern int module_id;
extern int modify_window;
extern int relative_paths;
extern int human_readable;
extern char *module_dir;
extern unsigned int module_dirlen;
extern mode_t orig_umask;
extern char *partial_dir;
extern struct filter_list_struct server_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 val;
if ((val = fcntl(fd, F_GETFL)) == -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)) == -1)
return;
if (val & NONBLOCK_FLAG) {
val &= ~NONBLOCK_FLAG;
fcntl(fd, F_SETFL, val);
}
}
/**
* 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 ret;
#ifdef 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 print_child_argv(const char *prefix, char **cmd)
{
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);
}
}
rprintf(FCLIENT, "\n");
}
NORETURN void out_of_memory(const char *str)
{
rprintf(FERROR, "ERROR: out of memory in %s [%s]\n", str, who_am_i());
exit_cleanup(RERR_MALLOC);
}
NORETURN void overflow_exit(const char *str)
{
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, mode_t mode)
{
#if !defined HAVE_LUTIMES || !defined HAVE_UTIMES
if (S_ISLNK(mode))
return 1;
#endif
if (verbose > 2) {
rprintf(FINFO, "set modtime of %s to (%ld) %s",
fname, (long)modtime,
asctime(localtime(&modtime)));
}
if (dry_run)
return 0;
{
#ifdef HAVE_UTIMES
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;
# ifdef HAVE_LUTIMES
if (S_ISLNK(mode)) {
if (lutimes(fname, t) < 0)
return errno == ENOSYS ? 1 : -1;
return 0;
}
# endif
return utimes(fname, t);
#elif defined HAVE_STRUCT_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
#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;
}
/* Create any necessary directories in fname. Any missing directories are
* created with default permissions. */
int create_directory_path(char *fname)
{
char *p;
int ret = 0;
while (*fname == '/')
fname++;
while (strncmp(fname, "./", 2) == 0)
fname += 2;
umask(orig_umask);
p = fname;
while ((p = strchr(p,'/')) != NULL) {
*p = '\0';
if (do_mkdir(fname, ACCESSPERMS) < 0 && errno != EEXIST)
ret = -1;
*p++ = '/';
}
umask(0);
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);
if (written < 0) {
if (errno == EINTR)
continue;
return written;
}
total_written += written;
ptr += written;
len -= written;
}
return total_written;
}
/**
* 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)
return len;
do {
n_chars = read(desc, ptr, len);
} while (n_chars < 0 && errno == EINTR);
return n_chars;
}
/* 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.
*
* 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 create_bak_dir)
{
int ifd;
char buf[1024 * 8];
int len; /* Number of bytes read into `buf'. */
if ((ifd = do_open(source, O_RDONLY, 0)) < 0) {
rsyserr(FERROR_XFER, errno, "open %s", full_fname(source));
return -1;
}
if (ofd < 0) {
if (robust_unlink(dest) && errno != ENOENT) {
rsyserr(FERROR_XFER, errno, "unlink %s", full_fname(dest));
return -1;
}
if ((ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0
&& (!create_bak_dir || errno != ENOENT || make_bak_dir(dest) < 0
|| (ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode)) < 0)) {
rsyserr(FERROR_XFER, errno, "open %s", full_fname(dest));
close(ifd);
return -1;
}
}
while ((len = safe_read(ifd, buf, sizeof buf)) > 0) {
if (full_write(ofd, buf, len) < 0) {
rsyserr(FERROR_XFER, errno, "write %s", full_fname(dest));
close(ifd);
close(ofd);
return -1;
}
}
if (len < 0) {
rsyserr(FERROR_XFER, errno, "read %s", full_fname(source));
close(ifd);
close(ofd);
return -1;
}
if (close(ifd) < 0) {
rsyserr(FWARNING, errno, "close failed on %s",
full_fname(source));
}
if (close(ofd) < 0) {
rsyserr(FERROR_XFER, errno, "close failed on %s",
full_fname(dest));
return -1;
}
return 0;
}
/* 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)
{
#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;
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 (verbose > 0) {
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)
return -1;
break;
#endif
case EXDEV:
if (partialptr) {
if (!handle_partial_dir(partialptr,PDIR_CREATE))
return -1;
to = partialptr;
}
if (copy_file(from, to, -1, mode, 0) != 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. **/
pid_t do_fork(void)
{
pid_t newpid = fork();
if (newpid != 0 && newpid != -1) {
all_pids[num_pids++] = newpid;
}
return newpid;
}
/**
* 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 (p == getpid())
continue;
if (p <= 0)
continue;
kill(p, sig);
}
}
/** Turn a user name into a uid */
int name_to_uid(const char *name, uid_t *uid_p)
{
struct passwd *pass;
if (!name || !*name)
return 0;
if (!(pass = getpwnam(name)))
return 0;
*uid_p = pass->pw_uid;
return 1;
}
/** Turn a group name into a gid */
int name_to_gid(const char *name, gid_t *gid_p)
{
struct group *grp;
if (!name || !*name)
return 0;
if (!(grp = getgrnam(name)))
return 0;
*gid_p = grp->gr_gid;
return 1;
}
/** 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;
}
static int filter_server_path(char *arg)
{
char *s;
if (server_filter_list.head) {
for (s = arg; (s = strchr(s, '/')) != NULL; ) {
*s = '\0';
if (check_filter(&server_filter_list, arg, 1) < 0) {
/* We must leave arg truncated! */
return 1;
}
*s++ = '/';
}
}
return 0;
}
void glob_expand(char *s, char ***argv_ptr, int *argc_ptr, int *maxargs_ptr)
{
char **argv = *argv_ptr;
int argc = *argc_ptr;
int maxargs = *maxargs_ptr;
#if !defined HAVE_GLOB || !defined HAVE_GLOB_H
if (argc == maxargs) {
maxargs += MAX_ARGS;
if (!(argv = realloc_array(argv, char *, maxargs)))
out_of_memory("glob_expand");
*argv_ptr = argv;
*maxargs_ptr = maxargs;
}
if (!*s)
s = ".";
s = argv[argc++] = strdup(s);
filter_server_path(s);
#else
glob_t globbuf;
if (maxargs <= argc)
return;
if (!*s)
s = ".";
if (sanitize_paths)
s = sanitize_path(NULL, s, "", 0);
else
s = strdup(s);
if (!s)
out_of_memory("glob_expand");
memset(&globbuf, 0, sizeof globbuf);
if (!filter_server_path(s))
glob(s, 0, NULL, &globbuf);
if (MAX((int)globbuf.gl_pathc, 1) > maxargs - argc) {
maxargs += globbuf.gl_pathc + MAX_ARGS;
if (!(argv = realloc_array(argv, char *, maxargs)))
out_of_memory("glob_expand");
*argv_ptr = argv;
*maxargs_ptr = maxargs;
}
if (globbuf.gl_pathc == 0)
argv[argc++] = s;
else {
int i;
free(s);
for (i = 0; i < (int)globbuf.gl_pathc; i++) {
if (!(argv[argc++] = strdup(globbuf.gl_pathv[i])))
out_of_memory("glob_expand");
}
}
globfree(&globbuf);
#endif
*argc_ptr = argc;
}
/* This routine is only used in daemon mode. */
void glob_expand_module(char *base1, char *arg, char ***argv_ptr, int *argc_ptr, int *maxargs_ptr)
{
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_ptr, argc_ptr, maxargs_ptr);
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, drops interior "."
* elements, drops an intial "./" unless CFN_KEEP_LEADING_DOT_DIR is flagged,
* will even 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, will even collapse ".."
* elements (except at the start of the string) if CFN_COLLAPSE_DOT_DOT_DIRS
* is flagged. If the resulting name would be empty, we return ".". */
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++;
else if (flags & CFN_KEEP_LEADING_DOT_DIR && *f == '.' && f[1] == '/') {
*t++ = *f++;
*t++ = *f++;
}
while (*f) {
/* discard extra slashes */
if (*f == '/') {
f++;
continue;
}
if (*f == '.') {
/* discard interior "." dirs */
if (f[1] == '/') {
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)
{
char *start, *sanp;
int rlen = 0, leave_one_dotdir = relative_paths;
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++] = '/';
}
}
start = sanp = dest + rlen;
while (*p) {
/* discard leading or extra slashes */
if (*p == '/') {
p++;
continue;
}
/* 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')) {
if (leave_one_dotdir && p[1])
leave_one_dotdir = 0;
else {
/* 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] != '/') {
/* skip back up to slash */
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 push_dir(const char *dir, int set_path_only)
{
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) {
errno = ENAMETOOLONG;
return 0;
}
if (!set_path_only && 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;
}
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 (verbose >= 5 && !set_path_only)
rprintf(FINFO, "[%s] push_dir(%s)\n", who_am_i(), 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(const 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;
if (sanitize_paths)
curr_dir_depth = count_dir_elements(curr_dir + module_dirlen);
if (verbose >= 5)
rprintf(FINFO, "[%s] pop_dir(%s)\n", who_am_i(), curr_dir);
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(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 (server_filter_list.head) {
t = strrchr(partial_fname, '/');
*t = '\0';
if (check_filter(&server_filter_list, partial_fname, 1) < 0)
return NULL;
*t = '/';
if (check_filter(&server_filter_list, 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;