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