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 | ||
c627d613 AT |
34 | char *map_file(int fd,off_t len) |
35 | { | |
36 | char *ret = (char *)mmap(NULL,len,PROT_READ,MAP_SHARED,fd,0); | |
37 | return ret; | |
38 | } | |
39 | ||
40 | void unmap_file(char *buf,off_t len) | |
41 | { | |
84664c10 | 42 | if (len > 0 && buf) |
c627d613 AT |
43 | munmap(buf,len); |
44 | } | |
45 | ||
46 | ||
c627d613 AT |
47 | /* this is taken from CVS */ |
48 | int piped_child(char **command,int *f_in,int *f_out) | |
49 | { | |
50 | int pid; | |
51 | int to_child_pipe[2]; | |
52 | int from_child_pipe[2]; | |
53 | ||
54 | if (pipe(to_child_pipe) < 0 || | |
55 | pipe(from_child_pipe) < 0) { | |
56 | fprintf(stderr,"pipe: %s\n",strerror(errno)); | |
57 | exit(1); | |
58 | } | |
59 | ||
60 | ||
61 | pid = fork(); | |
62 | if (pid < 0) { | |
63 | fprintf(stderr,"fork: %s\n",strerror(errno)); | |
64 | exit(1); | |
65 | } | |
66 | ||
67 | if (pid == 0) | |
68 | { | |
69 | if (dup2(to_child_pipe[0], STDIN_FILENO) < 0 || | |
70 | close(to_child_pipe[1]) < 0 || | |
71 | close(from_child_pipe[0]) < 0 || | |
72 | dup2(from_child_pipe[1], STDOUT_FILENO) < 0) { | |
73 | fprintf(stderr,"Failed to dup/close : %s\n",strerror(errno)); | |
74 | exit(1); | |
75 | } | |
76 | execvp(command[0], command); | |
77 | fprintf(stderr,"Failed to exec %s : %s\n", | |
78 | command[0],strerror(errno)); | |
79 | exit(1); | |
80 | } | |
81 | ||
82 | if (close(from_child_pipe[1]) < 0 || | |
83 | close(to_child_pipe[0]) < 0) { | |
84 | fprintf(stderr,"Failed to close : %s\n",strerror(errno)); | |
85 | exit(1); | |
86 | } | |
87 | ||
88 | *f_in = from_child_pipe[0]; | |
89 | *f_out = to_child_pipe[1]; | |
90 | ||
91 | return pid; | |
92 | } | |
93 | ||
94 | ||
95 | void out_of_memory(char *str) | |
96 | { | |
97 | fprintf(stderr,"out of memory in %s\n",str); | |
98 | exit(1); | |
99 | } | |
100 | ||
101 | ||
102 | #ifndef HAVE_STRDUP | |
103 | char *strdup(char *s) | |
104 | { | |
105 | int l = strlen(s) + 1; | |
106 | char *ret = (char *)malloc(l); | |
107 | if (ret) | |
108 | strcpy(ret,s); | |
109 | return ret; | |
110 | } | |
111 | #endif | |
112 | ||
113 | ||
114 | int set_modtime(char *fname,time_t modtime) | |
115 | { | |
116 | #ifdef HAVE_UTIME_H | |
117 | struct utimbuf tbuf; | |
118 | tbuf.actime = time(NULL); | |
119 | tbuf.modtime = modtime; | |
120 | return utime(fname,&tbuf); | |
121 | #elif defined(HAVE_UTIME) | |
122 | time_t t[2]; | |
123 | t[0] = time(NULL); | |
124 | t[1] = modtime; | |
125 | return utime(fname,t); | |
126 | #else | |
127 | struct timeval t[2]; | |
128 | t[0].tv_sec = time(NULL); | |
129 | t[0].tv_usec = 0; | |
130 | t[1].tv_sec = modtime; | |
131 | t[1].tv_usec = 0; | |
132 | return utimes(fname,t); | |
133 | #endif | |
134 | } | |
94481d91 | 135 | |
720b47f2 AT |
136 | |
137 | ||
138 | /**************************************************************************** | |
139 | Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available, | |
140 | else | |
141 | if SYSV use O_NDELAY | |
142 | if BSD use FNDELAY | |
143 | ****************************************************************************/ | |
144 | int set_blocking(int fd, int set) | |
145 | { | |
146 | int val; | |
147 | #ifdef O_NONBLOCK | |
148 | #define FLAG_TO_SET O_NONBLOCK | |
149 | #else | |
150 | #ifdef SYSV | |
151 | #define FLAG_TO_SET O_NDELAY | |
152 | #else /* BSD */ | |
153 | #define FLAG_TO_SET FNDELAY | |
154 | #endif | |
155 | #endif | |
156 | ||
157 | if((val = fcntl(fd, F_GETFL, 0)) == -1) | |
158 | return -1; | |
159 | if(set) /* Turn blocking on - ie. clear nonblock flag */ | |
160 | val &= ~FLAG_TO_SET; | |
161 | else | |
162 | val |= FLAG_TO_SET; | |
163 | return fcntl( fd, F_SETFL, val); | |
164 | #undef FLAG_TO_SET | |
165 | } |