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Commit | Line | Data |
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de56407f | 1 | /* |
2 | * $Source$ | |
3 | * $Header$ | |
4 | */ | |
546bc43b | 5 | /* (c) Copyright 1988 by the Massachusetts Institute of Technology. */ |
6 | /* For copying and distribution information, please see the file */ | |
7 | /* <mit-copyright.h>. */ | |
de56407f | 8 | |
9 | #ifndef lint | |
10 | static char *rcsid_get_file_c = "$Header$"; | |
11 | #endif lint | |
12 | ||
546bc43b | 13 | #include <mit-copyright.h> |
de56407f | 14 | #include <stdio.h> |
ea579254 | 15 | #include <gdb.h> |
de56407f | 16 | #include <ctype.h> |
17 | #include <sys/param.h> | |
18 | #include <sys/file.h> | |
2ad0a777 | 19 | #include <moira.h> |
de56407f | 20 | #include "update.h" |
de56407f | 21 | |
7b18e95b | 22 | #ifndef MIN |
23 | #define MIN(a,b) (((a) < (b))?(a):(b)) | |
24 | #endif /* MIN */ | |
25 | ||
de56407f | 26 | extern CONNECTION conn; |
27 | char buf[BUFSIZ]; | |
28 | ||
29 | extern int code, errno; | |
30 | ||
31 | extern int have_authorization, have_file, done; | |
32 | ||
33 | int get_block(); | |
34 | ||
35 | /* | |
36 | * get_file() | |
37 | * | |
38 | * arguments: | |
39 | * char *pathname | |
40 | * file to receive | |
41 | * int file_size | |
42 | * number of bytes | |
43 | * int checksum | |
44 | * linear checksum of bytes | |
45 | * | |
46 | * syntax: | |
47 | * (initial protocol already done) | |
48 | * <<< (int)code (can we accept the file?) | |
49 | * >>> (STRING)data | |
50 | * <<< (int)code | |
51 | * >>> (STRING)data | |
52 | * <<< (int)code | |
53 | * ... | |
54 | * >>> (STRING)data (last data block) | |
55 | * <<< (int)code (from read, write, checksum verify) | |
56 | * | |
57 | * returns: | |
58 | * int | |
59 | * 0 for success, 1 for failure | |
60 | * | |
61 | * function: | |
62 | * perform initial preparations and receive file as | |
63 | * a single string, storing it into <pathname> | |
64 | * | |
65 | */ | |
66 | ||
67 | int | |
68 | get_file(pathname, file_size, checksum) | |
69 | char *pathname; | |
70 | int file_size; | |
71 | int checksum; | |
72 | { | |
73 | int fd, n_written; | |
74 | int found_checksum; | |
75 | ||
76 | if (!have_authorization) { | |
2ad0a777 | 77 | reject_call(MR_PERM); |
de56407f | 78 | return(1); |
79 | } | |
80 | if (done) /* re-initialize data */ | |
81 | initialize(); | |
82 | /* unlink old file */ | |
83 | (void) unlink(pathname); | |
84 | /* open file descriptor */ | |
85 | fd = open(pathname, O_CREAT|O_EXCL|O_WRONLY, 0700); | |
86 | if (fd == -1) { | |
87 | code = errno; | |
88 | sprintf(buf, "%s: creating file %s (get_file)", | |
89 | error_message(code), pathname); | |
2ad0a777 | 90 | mr_log_error(buf); |
de56407f | 91 | report_error("reporting file creation error (get_file)"); |
92 | return(1); | |
93 | } | |
94 | /* check to see if we've got the disk space */ | |
95 | n_written = 0; | |
96 | while (n_written < file_size) { | |
97 | register int n_wrote; | |
98 | n_wrote = write(fd, buf, sizeof(buf)); | |
99 | if (n_wrote == -1) { | |
100 | code = errno; | |
101 | sprintf(buf, "%s: verifying free disk space for %s (get_file)", | |
102 | error_message(code), pathname); | |
2ad0a777 | 103 | mr_log_error(buf); |
de56407f | 104 | /* do all we can to free the space */ |
105 | (void) unlink(pathname); | |
106 | (void) ftruncate(fd, 0); | |
107 | (void) close(fd); | |
108 | report_error("reporting test-write error (get_file)"); | |
109 | return(1); | |
110 | } | |
111 | n_written += n_wrote; | |
112 | } | |
113 | lseek(fd, 0, L_SET); | |
114 | if (send_ok()) | |
115 | lose("sending okay for file transfer (get_file)"); | |
116 | n_written = 0; | |
117 | while (n_written < file_size && code == 0) { | |
118 | int n_got = get_block(fd, file_size - n_written); | |
119 | if (n_got == -1) { | |
120 | /* get_block has already printed a message */ | |
121 | unlink(pathname); | |
122 | return(1); | |
123 | } | |
124 | n_written += n_got; | |
125 | if (n_written != file_size) | |
126 | if (send_ok()) | |
127 | lose("receiving data"); | |
128 | } | |
129 | if (code) { | |
130 | code = connection_errno(conn); | |
131 | report_error("reading file (get_file)"); | |
132 | return(1); | |
133 | } | |
134 | fsync(fd); | |
135 | ftruncate(fd, file_size); | |
136 | fsync(fd); | |
137 | close(fd); | |
138 | /* validate checksum */ | |
ea579254 | 139 | found_checksum = checksum_file(pathname); |
de56407f | 140 | if (checksum != found_checksum) { |
2ad0a777 | 141 | code = MR_MISSINGFILE; |
de56407f | 142 | com_err(whoami, code, ": expected = %d, found = %d", |
143 | checksum, found_checksum); | |
144 | report_error("checksum error"); | |
145 | return(1); | |
146 | } | |
de56407f | 147 | /* send ack or nack */ |
148 | have_file = 1; | |
149 | if (send_ok()) { | |
150 | code = connection_errno(conn); | |
151 | (void) unlink(pathname); | |
152 | lose("sending ok after file transfer (get_file)"); | |
153 | return(1); | |
154 | } | |
155 | return(0); | |
156 | } | |
157 | ||
158 | static int | |
159 | get_block(fd, max_size) | |
160 | int fd; | |
161 | int max_size; | |
162 | { | |
163 | STRING data; | |
164 | int n_read, n; | |
165 | ||
166 | code = receive_object(conn, (char *)&data, STRING_T); | |
167 | if (code) { | |
168 | code = connection_errno(conn); | |
169 | lose("receiving data file (get_file)"); | |
170 | } | |
171 | n_read = MIN(MAX_STRING_SIZE(data), max_size); | |
172 | n = 0; | |
173 | while (n < n_read) { | |
174 | register int n_wrote; | |
175 | n_wrote = write(fd, STRING_DATA(data)+n, | |
176 | n_read-n); | |
177 | if (n_wrote == -1) { | |
178 | code = errno; | |
179 | sprintf(buf, "%s: writing file (get_file)", error_message(code)); | |
2ad0a777 | 180 | mr_log_error(buf); |
de56407f | 181 | string_free(&data); |
182 | report_error("reporting write error (get_file)"); | |
183 | close(fd); | |
184 | return(-1); | |
185 | } | |
186 | n += n_wrote; | |
187 | } | |
188 | string_free(&data); | |
189 | return(n); | |
190 | } |