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 { 88, 0, "hd", ENTRY_TYPE_DISC, 12, 6 },
00095 { 89, 0, "hd", ENTRY_TYPE_DISC, 14, 6 },
00096 { 90, 0, "hd", ENTRY_TYPE_DISC, 16, 6 },
00097 { 91, 0, "hd", ENTRY_TYPE_DISC, 18, 6 },
00098 { 94, 0, "dasd", ENTRY_TYPE_DISC, 0, 2 },
00099 { 98, 0, "ubd", ENTRY_TYPE_DISC, 0, 4 },
00100 { 104, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 0, 4 },
00101 { 105, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 1, 4 },
00102 { 106, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 2, 4 },
00103 { 107, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 3, 4 },
00104 { 108, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 4, 4 },
00105 { 109, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 5, 4 },
00106 { 110, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 6, 4 },
00107 { 111, 0, "cciss", ENTRY_TYPE_DISC_ARRAY_CONTROLLER, 7, 4 },
00108 { 114, 0, "ataraid", ENTRY_TYPE_DISC_ARRAY, 0, 4 },
00109 { 0, 0, NULL, ENTRY_TYPE_ONE, 0, 0 },
00110 };
00111
00112 struct stat s;
00113 struct entry *e;
00114
00115 ssize_t ret = 0;
00116
00117 unsigned int disc;
00118 unsigned int part;
00119
00120 if (!strcmp ("none", path))
00121 return snprintf (buf, n, "%s", path);
00122
00123 if (stat (path,&s) == -1)
00124 return 0;
00125
00126 e = entries;
00127 while (e->name != NULL) {
00128 if (major (s.st_rdev) == e->major &&
00129 ((e->type == ENTRY_TYPE_ONE && minor (s.st_rdev) == e->minor) ||
00130 (e->type != ENTRY_TYPE_ONE && minor (s.st_rdev) >= e->minor))) {
00131 break;
00132 }
00133 e++;
00134 }
00135 if (!e->name) {
00136 #ifdef TEST
00137 fprintf(stderr, "(unknown device)\n");
00138 #endif
00139
00140 return snprintf (buf, n, "%s", path);
00141 }
00142
00143 strcat (buf, "/dev/");
00144
00145 switch (e->type)
00146 {
00147 case ENTRY_TYPE_ONE:
00148 ret = di_snprintfcat (buf, n, "%s", e->name);
00149 break;
00150
00151 case ENTRY_TYPE_NUMBER:
00152 disc = minor (s.st_rdev) - e->minor + e->entry_first;
00153
00154 ret = di_snprintfcat (buf, n, "%s%d", e->name, disc);
00155 break;
00156
00157 case ENTRY_TYPE_DISC:
00158 case ENTRY_TYPE_DISC_ARRAY:
00159 case ENTRY_TYPE_DISC_ARRAY_CONTROLLER:
00160 disc = (minor (s.st_rdev) >> e->entry_disc_minor_shift);
00161 part = (minor (s.st_rdev) & ((1 << e->entry_disc_minor_shift) - 1));
00162
00163 switch (e->type)
00164 {
00165 case ENTRY_TYPE_DISC:
00166 disc += e->entry_first;
00167
00168 if (disc + 'a' > 'z')
00169 {
00170 disc -= 26;
00171 ret = di_snprintfcat (buf, n, "%s%c%c", e->name, 'a' + disc / 26, 'a' + disc % 26);
00172 }
00173 else
00174 ret = di_snprintfcat (buf, n, "%s%c", e->name, 'a' + disc);
00175
00176 if (part)
00177 ret = di_snprintfcat (buf, n, "%d", part);
00178
00179 break;
00180 case ENTRY_TYPE_DISC_ARRAY:
00181 case ENTRY_TYPE_DISC_ARRAY_CONTROLLER:
00182 ret = di_snprintfcat (buf, n, "%s/", e->name);
00183 if (e->type == ENTRY_TYPE_DISC_ARRAY_CONTROLLER)
00184 ret = di_snprintfcat (buf, n, "c%d", e->entry_first);
00185 ret = di_snprintfcat (buf, n, "d%d", disc);
00186
00187 if (part)
00188 ret = di_snprintfcat (buf, n, "p%d", part);
00189
00190 break;
00191 default:
00192 break;
00193 }
00194 break;
00195 };
00196
00197 return ret;
00198 }