*/
#include "rsync.h"
-static int total_written = 0;
-static int total_read = 0;
-
-extern int verbose;
-
-int write_total(void)
+int num_waiting(int fd)
{
- return total_written;
+ int len=0;
+ ioctl(fd,FIONREAD,&len);
+ return(len);
}
-int read_total(void)
+
+
+/* this is taken from CVS */
+int piped_child(char **command,int *f_in,int *f_out)
{
- return total_read;
+ int pid;
+ int to_child_pipe[2];
+ int from_child_pipe[2];
+
+ if (pipe(to_child_pipe) < 0 ||
+ pipe(from_child_pipe) < 0) {
+ rprintf(FERROR,"pipe: %s\n",strerror(errno));
+ exit_cleanup(1);
+ }
+
+
+ pid = do_fork();
+ if (pid < 0) {
+ rprintf(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) {
+ rprintf(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);
+ rprintf(FERROR,"Failed to exec %s : %s\n",
+ command[0],strerror(errno));
+ exit_cleanup(1);
+ }
+
+ if (close(from_child_pipe[1]) < 0 ||
+ close(to_child_pipe[0]) < 0) {
+ rprintf(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;
}
-void write_int(int f,int x)
+int local_child(int argc, char **argv,int *f_in,int *f_out)
{
- 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;
+ int pid;
+ int to_child_pipe[2];
+ int from_child_pipe[2];
+
+ if (pipe(to_child_pipe) < 0 ||
+ pipe(from_child_pipe) < 0) {
+ rprintf(FERROR,"pipe: %s\n",strerror(errno));
+ exit_cleanup(1);
+ }
+
+
+ pid = do_fork();
+ if (pid < 0) {
+ rprintf(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) {
+ rprintf(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]);
+ start_server(STDIN_FILENO, STDOUT_FILENO, argc, argv);
+ }
+
+ if (close(from_child_pipe[1]) < 0 ||
+ close(to_child_pipe[0]) < 0) {
+ rprintf(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;
}
-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(1);
}
-static int num_waiting(int fd)
+void overflow(char *str)
{
- int len=0;
-#ifdef FIONREAD
- ioctl(fd,FIONREAD,&len);
-#endif
- return(len);
+ rprintf(FERROR,"ERROR: buffer overflow in %s\n",str);
+ exit_cleanup(1);
}
-static char *read_buffer = NULL;
-static char *read_buffer_p = NULL;
-static int read_buffer_len = 0;
-static int read_buffer_size = 0;
-void write_flush(int f)
+int set_modtime(char *fname,time_t modtime)
{
+ extern int dry_run;
+ if (dry_run) return 0;
+ {
+#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
+ }
}
-/* This function was added to overcome a deadlock problem when using
- * ssh. It looks like we can't allow our receive queue to get full or
- * ssh will clag up. Uggh. */
-void read_check(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 n;
+ extern int orig_umask;
+ char *p;
+
+ while (*fname == '/') fname++;
+ while (strncmp(fname,"./",2)==0) fname += 2;
+
+ p = fname;
+ while ((p=strchr(p,'/'))) {
+ *p = 0;
+ do_mkdir(fname,0777 & ~orig_umask);
+ *p = '/';
+ p++;
+ }
+ return 0;
+}
- if (read_buffer_len == 0) {
- read_buffer_p = read_buffer;
- }
- if ((n=num_waiting(f)) <= 0)
- return;
+/* Write LEN bytes at PTR to descriptor DESC, retrying if interrupted.
+ Return LEN upon success, write's (negative) error code otherwise.
- if (read_buffer_p != read_buffer) {
- memmove(read_buffer,read_buffer_p,read_buffer_len);
- read_buffer_p = read_buffer;
- }
+ 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;
+}
- if (n > (read_buffer_size - read_buffer_len)) {
- read_buffer_size += n;
- if (!read_buffer)
- read_buffer = (char *)malloc(read_buffer_size);
- else
- read_buffer = (char *)realloc(read_buffer,read_buffer_size);
- if (!read_buffer) out_of_memory("read check");
- read_buffer_p = read_buffer;
- }
+/* 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.
- n = read(f,read_buffer+read_buffer_len,n);
- if (n > 0) {
- read_buffer_len += n;
- }
+ 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;
}
-static int readfd(int fd,char *buffer,int N)
+/* copy a file - this is used in conjunction with the --temp-dir option */
+int copy_file(char *source, char *dest, mode_t mode)
{
- int ret;
- int total=0;
-
- while (total < N)
- {
- if (read_buffer_len > 0) {
- ret = MIN(read_buffer_len,N-total);
- memcpy(buffer+total,read_buffer_p,ret);
- read_buffer_p += ret;
- read_buffer_len -= ret;
- } else {
- ret = read(fd,buffer + total,N - total);
- }
+ int ifd;
+ int ofd;
+ char buf[1024 * 8];
+ int len; /* Number of bytes read into `buf'. */
+
+ ifd = open(source, O_RDONLY);
+ if (ifd == -1) {
+ rprintf(FERROR,"open %s: %s\n",
+ source,strerror(errno));
+ return -1;
+ }
+
+ if (do_unlink(dest) && errno != ENOENT) {
+ rprintf(FERROR,"unlink %s: %s\n",
+ dest,strerror(errno));
+ return -1;
+ }
+
+ ofd = do_open(dest, O_WRONLY | O_CREAT | O_TRUNC | O_EXCL, mode);
+ if (ofd < 0) {
+ rprintf(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) {
+ rprintf(FERROR,"write %s: %s\n",
+ dest,strerror(errno));
+ close(ifd);
+ close(ofd);
+ return -1;
+ }
+ }
+
+ close(ifd);
+ close(ofd);
+
+ if (len < 0) {
+ rprintf(FERROR,"read %s: %s\n",
+ source,strerror(errno));
+ return -1;
+ }
+
+ return 0;
+}
- if (ret <= 0)
- return total;
- total += ret;
- }
- return total;
+/* 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);
}
-int read_int(int f)
+static pid_t all_pids[10];
+static int num_pids;
+
+/* fork and record the pid of the child */
+pid_t do_fork(void)
{
- 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);
+ pid_t newpid = fork();
+
+ if (newpid) {
+ all_pids[num_pids++] = newpid;
+ }
+ return newpid;
}
-void read_buf(int f,char *buf,int len)
+/* kill all children */
+void kill_all(int sig)
{
- 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 i;
+ for (i=0;i<num_pids;i++) {
+ if (all_pids[i] != getpid())
+ kill(all_pids[i], sig);
+ }
}
+/* like strncpy but does not 0 fill the buffer and always null
+ terminates (thus it can use maxlen+1 space in d) */
+void strlcpy(char *d, char *s, int maxlen)
+{
+ int len = strlen(s);
+ if (len > maxlen) len = maxlen;
+ memcpy(d, s, len);
+ d[len] = 0;
+}
+
+/* like strncat but does not 0 fill the buffer and always null
+ terminates (thus it can use maxlen+1 space in d) */
+void strlcat(char *d, char *s, int maxlen)
+{
+ int len1 = strlen(d);
+ int len2 = strlen(s);
+ if (len1+len2 > maxlen) {
+ len2 = maxlen-len1;
+ }
+ if (len2 > 0) {
+ memcpy(d+len1, s, len2);
+ d[len1+len2] = 0;
+ }
+}
-char *map_file(int fd,off_t len)
+/* turn a user name into a uid */
+int name_to_uid(char *name, uid_t *uid)
{
- char *ret = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
- return ret;
+ struct passwd *pass;
+ if (!name || !*name) return 0;
+ pass = getpwnam(name);
+ if (pass) {
+ *uid = pass->pw_uid;
+ return 1;
+ }
+ return 0;
}
-void unmap_file(char *buf,off_t len)
+/* turn a group name into a gid */
+int name_to_gid(char *name, gid_t *gid)
{
- if (len > 0 && buf)
- munmap(buf,len);
+ struct group *grp;
+ if (!name || !*name) return 0;
+ grp = getgrnam(name);
+ if (grp) {
+ *gid = grp->gr_gid;
+ return 1;
+ }
+ return 0;
}
-int read_write(int fd_in,int fd_out,int size)
+/****************************************************************************
+check if a process exists.
+****************************************************************************/
+int process_exists(int pid)
{
- 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");
- }
+ return(kill(pid,0) == 0 || errno != ESRCH);
+}
- 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;
+/* 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;
}
-/* this is taken from CVS */
-int piped_child(char **command,int *f_in,int *f_out)
+static void glob_expand_one(char *s, char **argv, int *argc, int maxargs)
{
- int pid;
- int to_child_pipe[2];
- int from_child_pipe[2];
+#ifndef HAVE_GLOB
+ if (!*s) s = ".";
+ argv[*argc] = strdup(s);
+ (*argc)++;
+ return;
+#else
+ glob_t globbuf;
+ int i;
+
+ if (!*s) s = ".";
+
+ argv[*argc] = strdup(s);
+
+ memset(&globbuf, 0, sizeof(globbuf));
+ glob(argv[*argc], 0, NULL, &globbuf);
+ if (globbuf.gl_pathc == 0) {
+ (*argc)++;
+ globfree(&globbuf);
+ return;
+ }
+ for (i=0; i<(maxargs - (*argc)) && i<globbuf.gl_pathc;i++) {
+ if (i == 0) free(argv[*argc]);
+ argv[(*argc) + i] = strdup(globbuf.gl_pathv[i]);
+ if (!argv[(*argc) + i]) out_of_memory("glob_expand");
+ }
+ globfree(&globbuf);
+ (*argc) += i;
+#endif
+}
- if (pipe(to_child_pipe) < 0 ||
- pipe(from_child_pipe) < 0) {
- fprintf(stderr,"pipe: %s\n",strerror(errno));
- exit(1);
- }
+void glob_expand(char *base1, char **argv, int *argc, int maxargs)
+{
+ char *s = argv[*argc];
+ char *p, *q;
+ char *base = base1;
+ if (!s || !*s) return;
- pid = fork();
- if (pid < 0) {
- fprintf(stderr,"fork: %s\n",strerror(errno));
- exit(1);
- }
+ if (strncmp(s, base, strlen(base)) == 0) {
+ s += strlen(base);
+ }
- 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);
- }
+ s = strdup(s);
+ if (!s) out_of_memory("glob_expand");
- if (close(from_child_pipe[1]) < 0 ||
- close(to_child_pipe[0]) < 0) {
- fprintf(stderr,"Failed to close : %s\n",strerror(errno));
- exit(1);
- }
+ base = (char *)malloc(strlen(base1)+3);
+ if (!base) out_of_memory("glob_expand");
- *f_in = from_child_pipe[0];
- *f_out = to_child_pipe[1];
-
- return pid;
+ sprintf(base," %s/", base1);
+
+ q = s;
+ while ((p = strstr(q,base)) && ((*argc) < maxargs)) {
+ /* split it at this point */
+ *p = 0;
+ glob_expand_one(q, argv, argc, maxargs);
+ q = p+strlen(base);
+ }
+
+ if (*q && (*argc < maxargs)) glob_expand_one(q, argv, argc, maxargs);
+
+ free(s);
+ free(base);
}
+/*******************************************************************
+ convert a string to lower case
+********************************************************************/
+void strlower(char *s)
+{
+ while (*s) {
+ if (isupper(*s)) *s = tolower(*s);
+ s++;
+ }
+}
-void out_of_memory(char *str)
+/* this is like vsnprintf but the 'n' limit does not include
+ the terminating null. So if you have a 1024 byte buffer then
+ pass 1023 for n */
+int vslprintf(char *str, int n, const char *format, va_list ap)
{
- fprintf(stderr,"out of memory in %s\n",str);
- exit(1);
+#ifdef HAVE_VSNPRINTF
+ int ret = vsnprintf(str, n, format, ap);
+ if (ret > n || ret < 0) {
+ str[n] = 0;
+ return -1;
+ }
+ str[ret] = 0;
+ return ret;
+#else
+ static char *buf;
+ static int len=MAXPATHLEN*8;
+ int ret;
+
+ /* this code is NOT a proper vsnprintf() implementation. It
+ relies on the fact that all calls to slprintf() in rsync
+ pass strings which have already been checked to be less
+ than MAXPATHLEN in length and never more than 2 strings are
+ concatenated. This means the above buffer is absolutely
+ ample and can never be overflowed.
+
+ In the future we would like to replace this with a proper
+ vsnprintf() implementation but right now we need a solution
+ that is secure and portable. This is it. */
+
+ if (!buf) {
+ buf = malloc(len);
+ if (!buf) {
+ /* can't call debug or we would recurse */
+ exit_cleanup(1);
+ }
+ }
+
+ vsprintf(buf, format, ap);
+ ret = strlen(buf);
+ if (ret > n) {
+ /* yikes! */
+ exit_cleanup(1);
+ }
+ buf[ret] = 0;
+
+ memcpy(str, buf, ret+1);
+
+ return ret;
+#endif
}
-#ifndef HAVE_STRDUP
- char *strdup(char *s)
+/* like snprintf but always null terminates */
+int slprintf(char *str, int n, char *format, ...)
{
- int l = strlen(s) + 1;
- char *ret = (char *)malloc(l);
- if (ret)
- strcpy(ret,s);
- return ret;
+ va_list ap;
+ int ret;
+
+ va_start(ap, format);
+ ret = vslprintf(str,n,format,ap);
+ va_end(ap);
+ return ret;
}
-#endif
-int set_modtime(char *fname,time_t modtime)
+void *Realloc(void *p, int size)
{
-#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);
-#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
+ if (!p) return (void *)malloc(size);
+ return (void *)realloc(p, size);
+}
+
+
+void clean_fname(char *name)
+{
+ char *p;
+ int l;
+ int modified = 1;
+
+ if (!name) return;
+
+ while (modified) {
+ modified = 0;
+
+ if ((p=strstr(name,"/./"))) {
+ modified = 1;
+ while (*p) {
+ p[0] = p[2];
+ p++;
+ }
+ }
+
+ if ((p=strstr(name,"//"))) {
+ 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;
+ }
+ }
}
+
+static char curr_dir[MAXPATHLEN];
+
+/* like chdir() but can be reversed with pop_dir() if save is set. It
+ is also much faster as it remembers where we have been */
+char *push_dir(char *dir, int save)
+{
+ char *ret = curr_dir;
+ static int initialised;
+
+ if (!initialised) {
+ initialised = 1;
+ getcwd(curr_dir, sizeof(curr_dir)-1);
+ }
+
+ if (chdir(dir)) return NULL;
+
+ if (save) {
+ ret = strdup(curr_dir);
+ }
+
+ if (*dir == '/') {
+ strlcpy(curr_dir, dir, sizeof(curr_dir)-1);
+ } else {
+ strlcat(curr_dir,"/", sizeof(curr_dir)-1);
+ strlcat(curr_dir,dir, sizeof(curr_dir)-1);
+ }
+
+ clean_fname(curr_dir);
+
+ return ret;
+}
+
+/* reverse a push_dir call */
+int pop_dir(char *dir)
+{
+ int ret;
+
+ ret = chdir(dir);
+ if (ret) {
+ free(dir);
+ return ret;
+ }
+
+ strlcpy(curr_dir, dir, sizeof(curr_dir)-1);
+
+ free(dir);
+
+ return 0;
+}