return(len);
}
-char *map_file(int fd,off_t len)
+
+struct map_struct *map_file(int fd,off_t len)
{
- char *ret = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
+ 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;
+
+#ifdef HAVE_MMAP
+ if (len < MAX_MAP_SIZE)
+ ret->map = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
+#endif
return ret;
}
-void unmap_file(char *buf,off_t len)
+char *map_ptr(struct map_struct *map,off_t offset,int len)
{
- if (len > 0 && buf)
- munmap(buf,len);
+ int nread = -2;
+
+ if (map->map)
+ return map->map+offset;
+
+ if (len == 0)
+ return NULL;
+
+ len = MIN(len,map->size-offset);
+
+ 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);
+ len = MIN(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 (pipe(to_child_pipe) < 0 ||
pipe(from_child_pipe) < 0) {
- fprintf(stderr,"pipe: %s\n",strerror(errno));
- exit(1);
+ fprintf(FERROR,"pipe: %s\n",strerror(errno));
+ exit_cleanup(1);
}
- pid = fork();
+ pid = do_fork();
if (pid < 0) {
- fprintf(stderr,"fork: %s\n",strerror(errno));
- exit(1);
+ 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(stderr,"Failed to dup/close : %s\n",strerror(errno));
- exit(1);
+ 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(stderr,"Failed to exec %s : %s\n",
+ fprintf(FERROR,"Failed to exec %s : %s\n",
command[0],strerror(errno));
- exit(1);
+ exit_cleanup(1);
}
if (close(from_child_pipe[1]) < 0 ||
close(to_child_pipe[0]) < 0) {
- fprintf(stderr,"Failed to close : %s\n",strerror(errno));
- exit(1);
+ fprintf(FERROR,"Failed to close : %s\n",strerror(errno));
+ exit_cleanup(1);
}
*f_in = from_child_pipe[0];
void out_of_memory(char *str)
{
- fprintf(stderr,"out of memory in %s\n",str);
- exit(1);
+ fprintf(FERROR,"out of memory in %s\n",str);
+ exit_cleanup(1);
}
-#ifndef HAVE_STRDUP
- char *strdup(char *s)
-{
- int l = strlen(s) + 1;
- char *ret = (char *)malloc(l);
- if (ret)
- strcpy(ret,s);
- return ret;
-}
-#endif
-
int set_modtime(char *fname,time_t modtime)
{
-#ifdef HAVE_UTIME_H
+#ifdef HAVE_UTIMBUF
struct utimbuf tbuf;
tbuf.actime = time(NULL);
tbuf.modtime = modtime;
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;
+
+ while (*fname == '/') fname++;
+ while (strncmp(fname,"./",2)==0) fname += 2;
+
+ p = fname;
+ while ((p=strchr(p,'/'))) {
+ *p = 0;
+ mkdir(fname,0777 & ~orig_umask);
+ *p = '/';
+ p++;
+ }
+ return 0;
+}
+
+
+/* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted.
+ Return LEN upon success, write's (negative) error code otherwise.
+
+ derived from GNU C's cccp.c.
+*/
+int full_write(int desc, char *ptr, int len)
+{
+ int total_written;
+
+ total_written = 0;
+ while (len > 0) {
+ int written = write (desc, ptr, len);
+ if (written < 0) {
+#ifdef EINTR
+ if (errno == EINTR)
+ continue;
+#endif
+ return written;
+ }
+ total_written += written;
+ ptr += written;
+ len -= 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)
+{
+ int n_chars;
+
+ 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)
+{
+ 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 (unlink(dest) && errno != ENOENT) {
+ fprintf(FERROR,"unlink %s: %s\n",
+ dest,strerror(errno));
+ return -1;
+ }
+
+ ofd = 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;
+ }
+
+ 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));
+ close(ifd);
+ close(ofd);
+ return -1;
+ }
+ }
+
+ close(ifd);
+ close(ofd);
+
+ if (len < 0) {
+ fprintf(FERROR,"read %s: %s\n",
+ source,strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
+
+/* sleep for a while via select */
+void u_sleep(int usec)
+{
+ struct timeval tv;
+
+ tv.tv_sec = 0;
+ tv.tv_usec = usec;
+ select(0, NULL, NULL, NULL, &tv);
+}
+
+
+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) {
+ all_pids[num_pids++] = newpid;
+ }
+ return newpid;
+}
+
+/* kill all children */
+void kill_all(int sig)
+{
+ int i;
+ for (i=0;i<num_pids;i++) {
+ if (all_pids[i] != getpid())
+ kill(all_pids[i], sig);
+ }
+}
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff