2 Copyright (C) Andrew Tridgell 1996
3 Copyright (C) Paul Mackerras 1996
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 Utilities used in rsync
27 int num_waiting(int fd)
30 ioctl(fd,FIONREAD,&len);
34 static int map_fd = -1;
35 static off_t map_size = 0;
36 static char *p = NULL;
37 static int p_size = 0;
38 static int p_offset = 0;
42 char *map_file(int fd,off_t len)
46 if (len < MAX_MAP_SIZE)
47 ret = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0);
54 char *map_ptr(char *buf,off_t offset,int len)
62 len = MIN(len,map_size-offset);
64 if (offset >= p_offset &&
65 offset+len <= p_offset+p_len) {
66 return (p + (offset - p_offset));
69 len = MAX(len,WRITE_BLOCK_SIZE);
70 len = MIN(len,map_size - offset);
74 p = (char *)malloc(len);
75 if (!p) out_of_memory("map_ptr");
79 if (lseek(map_fd,offset,SEEK_SET) != offset ||
80 read(map_fd,p,len) != len) {
81 fprintf(stderr,"EOF in map_ptr!\n");
92 void unmap_file(char *buf,off_t len)
104 /* this is taken from CVS */
105 int piped_child(char **command,int *f_in,int *f_out)
108 int to_child_pipe[2];
109 int from_child_pipe[2];
111 if (pipe(to_child_pipe) < 0 ||
112 pipe(from_child_pipe) < 0) {
113 fprintf(stderr,"pipe: %s\n",strerror(errno));
120 fprintf(stderr,"fork: %s\n",strerror(errno));
126 if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 ||
127 close(to_child_pipe[1]) < 0 ||
128 close(from_child_pipe[0]) < 0 ||
129 dup2(from_child_pipe[1], STDOUT_FILENO) < 0) {
130 fprintf(stderr,"Failed to dup/close : %s\n",strerror(errno));
133 execvp(command[0], command);
134 fprintf(stderr,"Failed to exec %s : %s\n",
135 command[0],strerror(errno));
139 if (close(from_child_pipe[1]) < 0 ||
140 close(to_child_pipe[0]) < 0) {
141 fprintf(stderr,"Failed to close : %s\n",strerror(errno));
145 *f_in = from_child_pipe[0];
146 *f_out = to_child_pipe[1];
152 void out_of_memory(char *str)
154 fprintf(stderr,"out of memory in %s\n",str);
160 char *strdup(char *s)
162 int l = strlen(s) + 1;
163 char *ret = (char *)malloc(l);
171 int set_modtime(char *fname,time_t modtime)
175 tbuf.actime = time(NULL);
176 tbuf.modtime = modtime;
177 return utime(fname,&tbuf);
178 #elif defined(HAVE_UTIME)
182 return utime(fname,t);
185 t[0].tv_sec = time(NULL);
187 t[1].tv_sec = modtime;
189 return utimes(fname,t);
195 /****************************************************************************
196 Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
200 ****************************************************************************/
201 int set_blocking(int fd, int set)
205 #define FLAG_TO_SET O_NONBLOCK
208 #define FLAG_TO_SET O_NDELAY
210 #define FLAG_TO_SET FNDELAY
214 if((val = fcntl(fd, F_GETFL, 0)) == -1)
216 if(set) /* Turn blocking on - ie. clear nonblock flag */
220 return fcntl( fd, F_SETFL, val);