Commit | Line | Data |
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c627d613 AT |
1 | /* |
2 | Copyright (C) Andrew Tridgell 1996 | |
3 | Copyright (C) Paul Mackerras 1996 | |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
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. | |
18 | */ | |
19 | ||
20 | /* | |
21 | Utilities used in rsync | |
22 | ||
23 | tridge, June 1996 | |
24 | */ | |
25 | #include "rsync.h" | |
26 | ||
720b47f2 | 27 | int num_waiting(int fd) |
94481d91 AT |
28 | { |
29 | int len=0; | |
94481d91 | 30 | ioctl(fd,FIONREAD,&len); |
94481d91 AT |
31 | return(len); |
32 | } | |
33 | ||
d9bea2dd | 34 | |
c6e7fcb4 | 35 | struct map_struct *map_file(int fd,off_t len) |
c627d613 | 36 | { |
c6e7fcb4 AT |
37 | struct map_struct *ret; |
38 | ret = (struct map_struct *)malloc(sizeof(*ret)); | |
39 | if (!ret) out_of_memory("map_file"); | |
40 | ||
41 | ret->map = NULL; | |
42 | ret->fd = fd; | |
43 | ret->size = len; | |
44 | ret->p = NULL; | |
45 | ret->p_size = 0; | |
46 | ret->p_offset = 0; | |
47 | ret->p_len = 0; | |
48 | ||
d9bea2dd AT |
49 | #ifdef HAVE_MMAP |
50 | if (len < MAX_MAP_SIZE) | |
c6e7fcb4 | 51 | ret->map = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0); |
d9bea2dd | 52 | #endif |
c627d613 AT |
53 | return ret; |
54 | } | |
55 | ||
c6e7fcb4 | 56 | char *map_ptr(struct map_struct *map,off_t offset,int len) |
d9bea2dd | 57 | { |
c6e7fcb4 AT |
58 | if (map->map) |
59 | return map->map+offset; | |
d9bea2dd AT |
60 | |
61 | if (len == 0) | |
62 | return NULL; | |
63 | ||
c6e7fcb4 | 64 | len = MIN(len,map->size-offset); |
d9bea2dd | 65 | |
c6e7fcb4 AT |
66 | if (offset >= map->p_offset && |
67 | offset+len <= map->p_offset+map->p_len) { | |
68 | return (map->p + (offset - map->p_offset)); | |
d9bea2dd AT |
69 | } |
70 | ||
34ccb63e | 71 | len = MAX(len,CHUNK_SIZE); |
c6e7fcb4 | 72 | len = MIN(len,map->size - offset); |
d9bea2dd | 73 | |
c6e7fcb4 AT |
74 | if (len > map->p_size) { |
75 | if (map->p) free(map->p); | |
76 | map->p = (char *)malloc(len); | |
77 | if (!map->p) out_of_memory("map_ptr"); | |
78 | map->p_size = len; | |
d9bea2dd AT |
79 | } |
80 | ||
c6e7fcb4 AT |
81 | if (lseek(map->fd,offset,SEEK_SET) != offset || |
82 | read(map->fd,map->p,len) != len) { | |
dc5ddbcc | 83 | fprintf(FERROR,"EOF in map_ptr!\n"); |
34ccb63e | 84 | exit_cleanup(1); |
d9bea2dd AT |
85 | } |
86 | ||
c6e7fcb4 AT |
87 | map->p_offset = offset; |
88 | map->p_len = len; | |
d9bea2dd | 89 | |
c6e7fcb4 | 90 | return map->p; |
d9bea2dd AT |
91 | } |
92 | ||
93 | ||
c6e7fcb4 | 94 | void unmap_file(struct map_struct *map) |
c627d613 | 95 | { |
7bec6a5c | 96 | #ifdef HAVE_MMAP |
c6e7fcb4 AT |
97 | if (map->map) |
98 | munmap(map->map,map->size); | |
7bec6a5c | 99 | #endif |
c6e7fcb4 AT |
100 | if (map->p) free(map->p); |
101 | free(map); | |
c627d613 AT |
102 | } |
103 | ||
104 | ||
c627d613 AT |
105 | /* this is taken from CVS */ |
106 | int piped_child(char **command,int *f_in,int *f_out) | |
107 | { | |
108 | int pid; | |
109 | int to_child_pipe[2]; | |
110 | int from_child_pipe[2]; | |
111 | ||
112 | if (pipe(to_child_pipe) < 0 || | |
113 | pipe(from_child_pipe) < 0) { | |
dc5ddbcc | 114 | fprintf(FERROR,"pipe: %s\n",strerror(errno)); |
34ccb63e | 115 | exit_cleanup(1); |
c627d613 AT |
116 | } |
117 | ||
118 | ||
119 | pid = fork(); | |
120 | if (pid < 0) { | |
dc5ddbcc | 121 | fprintf(FERROR,"fork: %s\n",strerror(errno)); |
34ccb63e | 122 | exit_cleanup(1); |
c627d613 AT |
123 | } |
124 | ||
125 | if (pid == 0) | |
126 | { | |
127 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
128 | close(to_child_pipe[1]) < 0 || | |
129 | close(from_child_pipe[0]) < 0 || | |
130 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
dc5ddbcc | 131 | fprintf(FERROR,"Failed to dup/close : %s\n",strerror(errno)); |
34ccb63e | 132 | exit_cleanup(1); |
c627d613 AT |
133 | } |
134 | execvp(command[0], command); | |
dc5ddbcc | 135 | fprintf(FERROR,"Failed to exec %s : %s\n", |
c627d613 | 136 | command[0],strerror(errno)); |
34ccb63e | 137 | exit_cleanup(1); |
c627d613 AT |
138 | } |
139 | ||
140 | if (close(from_child_pipe[1]) < 0 || | |
141 | close(to_child_pipe[0]) < 0) { | |
dc5ddbcc | 142 | fprintf(FERROR,"Failed to close : %s\n",strerror(errno)); |
34ccb63e | 143 | exit_cleanup(1); |
c627d613 AT |
144 | } |
145 | ||
146 | *f_in = from_child_pipe[0]; | |
147 | *f_out = to_child_pipe[1]; | |
148 | ||
149 | return pid; | |
150 | } | |
151 | ||
152 | ||
153 | void out_of_memory(char *str) | |
154 | { | |
dc5ddbcc | 155 | fprintf(FERROR,"out of memory in %s\n",str); |
34ccb63e | 156 | exit_cleanup(1); |
c627d613 AT |
157 | } |
158 | ||
159 | ||
160 | #ifndef HAVE_STRDUP | |
161 | char *strdup(char *s) | |
162 | { | |
163 | int l = strlen(s) + 1; | |
164 | char *ret = (char *)malloc(l); | |
165 | if (ret) | |
166 | strcpy(ret,s); | |
167 | return ret; | |
168 | } | |
169 | #endif | |
170 | ||
171 | ||
172 | int set_modtime(char *fname,time_t modtime) | |
173 | { | |
174 | #ifdef HAVE_UTIME_H | |
175 | struct utimbuf tbuf; | |
176 | tbuf.actime = time(NULL); | |
177 | tbuf.modtime = modtime; | |
178 | return utime(fname,&tbuf); | |
179 | #elif defined(HAVE_UTIME) | |
180 | time_t t[2]; | |
181 | t[0] = time(NULL); | |
182 | t[1] = modtime; | |
183 | return utime(fname,t); | |
184 | #else | |
185 | struct timeval t[2]; | |
186 | t[0].tv_sec = time(NULL); | |
187 | t[0].tv_usec = 0; | |
188 | t[1].tv_sec = modtime; | |
189 | t[1].tv_usec = 0; | |
190 | return utimes(fname,t); | |
191 | #endif | |
192 | } | |
94481d91 | 193 | |
720b47f2 AT |
194 | |
195 | ||
196 | /**************************************************************************** | |
197 | Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available, | |
198 | else | |
199 | if SYSV use O_NDELAY | |
200 | if BSD use FNDELAY | |
201 | ****************************************************************************/ | |
202 | int set_blocking(int fd, int set) | |
203 | { | |
204 | int val; | |
205 | #ifdef O_NONBLOCK | |
206 | #define FLAG_TO_SET O_NONBLOCK | |
207 | #else | |
208 | #ifdef SYSV | |
209 | #define FLAG_TO_SET O_NDELAY | |
210 | #else /* BSD */ | |
211 | #define FLAG_TO_SET FNDELAY | |
212 | #endif | |
213 | #endif | |
214 | ||
215 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
216 | return -1; | |
217 | if(set) /* Turn blocking on - ie. clear nonblock flag */ | |
218 | val &= ~FLAG_TO_SET; | |
219 | else | |
220 | val |= FLAG_TO_SET; | |
221 | return fcntl( fd, F_SETFL, val); | |
222 | #undef FLAG_TO_SET | |
223 | } |