48 exit(1); |
51 exit(1); |
49 } |
52 } |
50 |
53 |
51 /****************************************************************************/ |
54 /****************************************************************************/ |
52 |
55 |
53 int start_diskchange(char *multicmd, char *cd_dev) |
56 long long FlexLen(char *optarg) |
54 { |
57 { |
55 int pid, status=0; |
58 char *end; |
56 char buffer[12]; |
59 long long len; |
57 |
60 errno=0; len=strtoll(optarg,&end,10); |
58 if(multicmd) { /* we have an external script */ |
61 if(errno==ERANGE || len<1) serror("Option -l: length out of range (must be >=1)\n"); |
59 if((pid=fork())<0) error("Fork failed in diskchange"); |
62 switch(*end) { |
60 if(pid==0) { /* child */ |
63 case 'K': /* kilo-bytes*/ |
61 char *argv[3]; |
64 case 'k': |
62 |
65 len*=1024; break; |
63 dup2(2,0); dup2(2,1); /* duplicate stderr as stdin/stdout */ |
66 case 0: /* mega-bytes */ |
64 argv[0] = multicmd; |
67 case 'M': |
65 argv[1] = cd_dev; |
68 case 'm': |
66 argv[2] = 0; |
69 len*=(1024*1024); break; |
67 execvp(multicmd, argv); |
70 case 'G': |
68 error("Starting diskchange command failed"); |
71 case 'g': |
69 } |
72 len*=(1024*1024*1024LL); break; |
70 |
73 case 's': |
71 while(1) { |
74 case 'S': |
72 if(waitpid(pid,&status,0)==-1) { if (errno != EINTR) { status=-1; break; } } |
75 len*=CD_FRAMESIZE; break; |
73 else break; |
76 default: |
74 } |
77 serror("Unknown extention for media size"); |
75 } |
78 } |
76 else { /* use internal diskchange */ |
79 DEBUG("media size len=%lld blocks=%lld\n",len,len/CD_FRAMESIZE); |
77 fprintf(stderr,"\n\nPlease insert next disk and press RETURN\n\n\n"); |
80 return len; |
78 do { |
81 } |
79 pid=read(2,buffer,sizeof(buffer)); |
82 |
80 } while(pid==sizeof(buffer) && buffer[sizeof(buffer)-1]!='\n'); |
83 /****************************************************************************/ |
81 } |
84 |
82 return status; |
85 char *FlexSize(char *buff, long long val) |
83 } |
86 { |
|
87 char *unit=" "; |
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88 if(val > 1024*1024*1024*16LL) { val/=1024*1024*1024LL; unit="G"; } |
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89 else if(val > 1024*1024*16LL) { val/=1024*1024LL; unit="M"; } |
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90 else if(val > 1024*16LL) { val/=1024LL; unit="k"; } |
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91 sprintf(buff,"%5lld %sB",val,unit); |
|
92 return buff; |
|
93 } |
|
94 |
|
95 /****************************************************************************/ |
|
96 |
|
97 int full_read(int fd, void *buf, int count) |
|
98 { |
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99 int total=0; |
|
100 while(count>0) { |
|
101 int bytes; |
|
102 bytes=read(fd,buf,count); |
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103 if(bytes==0) break; |
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104 else if(bytes<0) { |
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105 if(errno!=EAGAIN) error("Read failed"); |
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106 usleep(200*1000); |
|
107 } |
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108 else { |
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109 count-=bytes; buf+=bytes; total+=bytes; |
|
110 } |
|
111 } |
|
112 return total; |
|
113 } |
|
114 |
|
115 /****************************************************************************/ |
|
116 |
|
117 void diskchange(char *multicmd, char *cd_dev) |
|
118 { |
|
119 int pid, status=0; |
|
120 char buffer[12]; |
|
121 |
|
122 if(multicmd) { /* we have an external script */ |
|
123 DEBUG("external diskchange started '%s'\n",multicmd); |
|
124 if((pid=fork())<0) error("Fork failed (diskchange)"); |
|
125 if(pid==0) { /* child */ |
|
126 char *argv[3]; |
|
127 |
|
128 dup2(2,0); dup2(2,1); /* duplicate stderr as stdin/stdout */ |
|
129 argv[0] = multicmd; |
|
130 argv[1] = cd_dev; |
|
131 argv[2] = 0; |
|
132 execvp(multicmd, argv); |
|
133 error("Exec failed (diskchange)"); |
|
134 } |
|
135 |
|
136 while(1) { |
|
137 if(waitpid(pid,&status,0)==-1) { if (errno!=EINTR) { status=-1; break; } } |
|
138 else break; |
|
139 } |
|
140 } |
|
141 else { /* use internal diskchange */ |
|
142 DEBUG("internal diskchange started\n"); |
|
143 fprintf(stderr,"\n\nPlease insert next disk and press RETURN\n\n\n"); |
|
144 do { |
|
145 pid=read(2,buffer,sizeof(buffer)); |
|
146 if(pid<0 && errno!=EAGAIN) error("Read failed (diskchange)"); |
|
147 } while(pid<=0 || (pid==sizeof(buffer) && buffer[sizeof(buffer)-1]!='\n')); |
|
148 } |
|
149 if(status) serror("Diskchange command failed"); |
|
150 DEBUG("diskchange completed\n"); |
|
151 } |
|
152 |
|
153 /****************************************************************************/ |
|
154 |
|
155 static unsigned long crc_table[256] = { |
|
156 0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, |
|
157 0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, |
|
158 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd, 0x4c11db70, 0x48d0c6c7, |
|
159 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75, |
|
160 0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, |
|
161 0x709f7b7a, 0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, |
|
162 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58, 0xbaea46ef, |
|
163 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d, |
|
164 0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, |
|
165 0xceb42022, 0xca753d95, 0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, |
|
166 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0, |
|
167 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072, |
|
168 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, |
|
169 0x0808d07d, 0x0cc9cdca, 0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, |
|
170 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08, |
|
171 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba, |
|
172 0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, |
|
173 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, |
|
174 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a, 0xe0b41de7, 0xe4750050, |
|
175 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, |
|
176 0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, |
|
177 0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, |
|
178 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb, 0x4f040d56, 0x4bc510e1, |
|
179 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53, |
|
180 0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, |
|
181 0x3f9b762c, 0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, |
|
182 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e, 0xf5ee4bb9, |
|
183 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b, |
|
184 0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, |
|
185 0xcda1f604, 0xc960ebb3, 0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, |
|
186 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71, |
|
187 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3, |
|
188 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, |
|
189 0x470cdd2b, 0x43cdc09c, 0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, |
|
190 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e, |
|
191 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec, |
|
192 0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, |
|
193 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, |
|
194 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c, 0xe3a1cbc1, 0xe760d676, |
|
195 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, |
|
196 0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, |
|
197 0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, |
|
198 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4 |
|
199 }; |
|
200 |
|
201 unsigned long crc32(char *data, int len) |
|
202 { |
|
203 unsigned long crc=0xffffffff; |
|
204 int i; |
|
205 for(i=0 ; i<len ; i++) |
|
206 crc=(crc<<8) ^ crc_table[((crc>>24)^*data++)&0xff]; |
|
207 return crc; |
|
208 } |