00042 {
00043 static struct entry
00044 {
00045 unsigned char major;
00046 unsigned char minor;
00047 char *name;
00048 enum { ENTRY_TYPE_ONE, ENTRY_TYPE_NUMBER, ENTRY_TYPE_DISC, ENTRY_TYPE_DISC_ARRAY, ENTRY_TYPE_DISC_ARRAY_CONTROLLER } type;
00049 unsigned char entry_first;
00050 unsigned char entry_disc_minor_shift;
00051 }
00052 entries[] =
00053 {
00054
00055
00056
00057
00058 { 2, 0, "fd", ENTRY_TYPE_NUMBER, 0, 0 },
00059 { 3, 0, "hd", ENTRY_TYPE_DISC, 0, 6 },
00060 { 4, 64, "ttyS", ENTRY_TYPE_NUMBER, 0, 0 },
00061 { 4, 0, "tty", ENTRY_TYPE_NUMBER, 0, 0 },
00062 { 7, 0, "loop", ENTRY_TYPE_NUMBER, 0, 0 },
00063 { 8, 0, "sd", ENTRY_TYPE_DISC, 0, 4 },
00064 { 9, 0, "md", ENTRY_TYPE_NUMBER, 0, 0 },
00065 { 11, 0, "scd", ENTRY_TYPE_NUMBER, 0, 0 },
00066 { 22, 0, "hd", ENTRY_TYPE_DISC, 2, 6 },
00067 { 33, 0, "hd", ENTRY_TYPE_DISC, 4, 6 },
00068 { 34, 0, "hd", ENTRY_TYPE_DISC, 6, 6 },
00069 { 48, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 0, 3 },
00070 { 49, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 1, 3 },
00071 { 50, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 2, 3 },
00072 { 51, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 3, 3 },
00073 { 52, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 4, 3 },
00074 { 53, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 5, 3 },
00075 { 54, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 6, 3 },
00076 { 55, 0, "rd", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 7, 3 },
00077 { 56, 0, "hd", ENTRY_TYPE_DISC, 8, 6 },
00078 { 57, 0, "hd", ENTRY_TYPE_DISC, 10, 6 },
00079 { 65, 0, "sd", ENTRY_TYPE_DISC, 16, 4 },
00080 { 66, 0, "sd", ENTRY_TYPE_DISC, 32, 4 },
00081 { 67, 0, "sd", ENTRY_TYPE_DISC, 48, 4 },
00082 { 68, 0, "sd", ENTRY_TYPE_DISC, 64, 4 },
00083 { 69, 0, "sd", ENTRY_TYPE_DISC, 80, 4 },
00084 { 70, 0, "sd", ENTRY_TYPE_DISC, 96, 4 },
00085 { 71, 0, "sd", ENTRY_TYPE_DISC, 112, 4 },
00086 { 72, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 0, 4 },
00087 { 73, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 1, 4 },
00088 { 74, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 2, 4 },
00089 { 75, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 3, 4 },
00090 { 76, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 4, 4 },
00091 { 77, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 5, 4 },
00092 { 78, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 6, 4 },
00093 { 79, 0, "ida", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 7, 4 },
00094 { 80, 0, "i2o/hd", ENTRY_TYPE_DISC, 0, 4 },
00095 { 88, 0, "hd", ENTRY_TYPE_DISC, 12, 6 },
00096 { 89, 0, "hd", ENTRY_TYPE_DISC, 14, 6 },
00097 { 90, 0, "hd", ENTRY_TYPE_DISC, 16, 6 },
00098 { 91, 0, "hd", ENTRY_TYPE_DISC, 18, 6 },
00099 { 94, 0, "dasd", ENTRY_TYPE_DISC, 0, 2 },
00100 { 98, 0, "ubd", ENTRY_TYPE_DISC, 0, 4 },
00101 { 104, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 0, 4 },
00102 { 105, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 1, 4 },
00103 { 106, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 2, 4 },
00104 { 107, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 3, 4 },
00105 { 108, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 4, 4 },
00106 { 109, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 5, 4 },
00107 { 110, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 6, 4 },
00108 { 111, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 7, 4 },
00109 { 114, 0, "ataraid", ENTRY_TYPE_DISC_ARRAY, 0, 4 },
00110 { 0, 0, NULL, ENTRY_TYPE_ONE, 0, 0 },
00111 };
00112
00113 struct stat s;
00114 struct entry *e;
00115
00116 ssize_t ret = 0;
00117
00118 unsigned int disc;
00119 unsigned int part;
00120
00121 if (!strcmp ("none", path))
00122 return snprintf (buf, n, "%s", path);
00123
00124 if (stat (path,&s) == -1)
00125 return 0;
00126
00127 e = entries;
00128 while (e->name != NULL) {
00129 if (major (s.st_rdev) == e->major &&
00130 ((e->type == ENTRY_TYPE_ONE && minor (s.st_rdev) == e->minor) ||
00131 (e->type != ENTRY_TYPE_ONE && minor (s.st_rdev) >= e->minor))) {
00132 break;
00133 }
00134 e++;
00135 }
00136 if (!e->name) {
00137 #ifdef TEST
00138 fprintf(stderr, "(unknown device)\n");
00139 #endif
00140
00141 return snprintf (buf, n, "%s", path);
00142 }
00143
00144 strcat (buf, "/dev/");
00145
00146 switch (e->type)
00147 {
00148 case ENTRY_TYPE_ONE:
00149 ret = di_snprintfcat (buf, n, "%s", e->name);
00150 break;
00151
00152 case ENTRY_TYPE_NUMBER:
00153 disc = minor (s.st_rdev) - e->minor + e->entry_first;
00154
00155 ret = di_snprintfcat (buf, n, "%s%d", e->name, disc);
00156 break;
00157
00158 case ENTRY_TYPE_DISC:
00159 case ENTRY_TYPE_DISC_ARRAY:
00160 case ENTRY_TYPE_DISC_ARRAY_CONTROLLER:
00161 disc = (minor (s.st_rdev) >> e->entry_disc_minor_shift);
00162 part = (minor (s.st_rdev) & ((1 << e->entry_disc_minor_shift) - 1));
00163
00164 switch (e->type)
00165 {
00166 case ENTRY_TYPE_DISC:
00167 disc += e->entry_first;
00168
00169 if (disc + 'a' > 'z')
00170 {
00171 disc -= 26;
00172 ret = di_snprintfcat (buf, n, "%s%c%c", e->name, 'a' + disc / 26, 'a' + disc % 26);
00173 }
00174 else
00175 ret = di_snprintfcat (buf, n, "%s%c", e->name, 'a' + disc);
00176
00177 if (part)
00178 ret = di_snprintfcat (buf, n, "%d", part);
00179
00180 break;
00181 case ENTRY_TYPE_DISC_ARRAY:
00182 case ENTRY_TYPE_DISC_ARRAY_CONTROLLER:
00183 ret = di_snprintfcat (buf, n, "%s/", e->name);
00184 if (e->type == ENTRY_TYPE_DISC_ARRAY_CONTROLLER)
00185 ret = di_snprintfcat (buf, n, "c%d", e->entry_first);
00186 ret = di_snprintfcat (buf, n, "d%d", disc);
00187
00188 if (part)
00189 ret = di_snprintfcat (buf, n, "p%d", part);
00190
00191 break;
00192 default:
00193 break;
00194 }
00195 break;
00196 };
00197
00198 return ret;
00199 }