00041 {
00042 static struct entry
00043 {
00044 unsigned char major;
00045 unsigned char minor;
00046 char *name;
00047 enum { ENTRY_TYPE_ONE, ENTRY_TYPE_NUMBER, ENTRY_TYPE_DISC, ENTRY_TYPE_DISC_ARRAY } type;
00048 unsigned char entry_first;
00049 unsigned char entry_disc_minor_shift;
00050 }
00051 entries[] =
00052 {
00053
00054
00055
00056
00057 { 2, 0, "fd", ENTRY_TYPE_NUMBER, 0, 0 },
00058 { 3, 0, "hd", ENTRY_TYPE_DISC, 0, 6 },
00059 { 4, 64, "ttyS", ENTRY_TYPE_NUMBER, 0, 0 },
00060 { 4, 0, "tty", ENTRY_TYPE_NUMBER, 0, 0 },
00061 { 8, 0, "sd", ENTRY_TYPE_DISC, 0, 4 },
00062 { 9, 0, "md", ENTRY_TYPE_NUMBER, 0, 0 },
00063 { 11, 0, "scd", ENTRY_TYPE_NUMBER, 0, 0 },
00064 { 22, 0, "hd", ENTRY_TYPE_DISC, 2, 6 },
00065 { 33, 0, "hd", ENTRY_TYPE_DISC, 4, 6 },
00066 { 34, 0, "hd", ENTRY_TYPE_DISC, 6, 6 },
00067 { 48, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 0, 3 },
00068 { 49, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 1, 3 },
00069 { 50, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 2, 3 },
00070 { 51, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 3, 3 },
00071 { 52, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 4, 3 },
00072 { 53, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 5, 3 },
00073 { 54, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 6, 3 },
00074 { 55, 0, "rd", ENTRY_TYPE_DISC_ARRAY, 7, 3 },
00075 { 56, 0, "hd", ENTRY_TYPE_DISC, 8, 6 },
00076 { 57, 0, "hd", ENTRY_TYPE_DISC, 10, 6 },
00077 { 65, 0, "sd", ENTRY_TYPE_DISC, 16, 4 },
00078 { 66, 0, "sd", ENTRY_TYPE_DISC, 32, 4 },
00079 { 67, 0, "sd", ENTRY_TYPE_DISC, 48, 4 },
00080 { 68, 0, "sd", ENTRY_TYPE_DISC, 64, 4 },
00081 { 69, 0, "sd", ENTRY_TYPE_DISC, 80, 4 },
00082 { 70, 0, "sd", ENTRY_TYPE_DISC, 96, 4 },
00083 { 71, 0, "sd", ENTRY_TYPE_DISC, 112, 4 },
00084 { 72, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 0, 3 },
00085 { 73, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 1, 3 },
00086 { 74, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 2, 3 },
00087 { 75, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 3, 3 },
00088 { 76, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 4, 3 },
00089 { 77, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 5, 3 },
00090 { 78, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 6, 3 },
00091 { 79, 0, "ida", ENTRY_TYPE_DISC_ARRAY, 7, 3 },
00092 { 88, 0, "hd", ENTRY_TYPE_DISC, 12, 6 },
00093 { 89, 0, "hd", ENTRY_TYPE_DISC, 14, 6 },
00094 { 90, 0, "hd", ENTRY_TYPE_DISC, 16, 6 },
00095 { 91, 0, "hd", ENTRY_TYPE_DISC, 18, 6 },
00096 { 94, 0, "dasd", ENTRY_TYPE_DISC, 0, 2 },
00097 { 104, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 0, 4 },
00098 { 105, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 1, 4 },
00099 { 106, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 2, 4 },
00100 { 107, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 3, 4 },
00101 { 108, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 4, 4 },
00102 { 109, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 5, 4 },
00103 { 110, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 6, 4 },
00104 { 111, 0, "cciss", ENTRY_TYPE_DISC_ARRAY, 7, 4 },
00105 { 114, 0, "ataraid", ENTRY_TYPE_DISC_ARRAY, 0, 4 },
00106 { 0, 0, NULL, ENTRY_TYPE_ONE, 0, 0 },
00107 };
00108
00109 struct stat s;
00110 struct entry *e;
00111
00112 ssize_t ret = 0;
00113
00114 unsigned int disc;
00115 unsigned int part;
00116
00117 if (!strcmp ("none", path))
00118 return snprintf (buf, n, "%s", path);
00119
00120 if (stat (path,&s) == -1)
00121 return 0;
00122
00123 e = entries;
00124 while (e->name != NULL) {
00125 if (major (s.st_rdev) == e->major &&
00126 ((e->type == ENTRY_TYPE_ONE && minor (s.st_rdev) == e->minor) ||
00127 (e->type != ENTRY_TYPE_ONE && minor (s.st_rdev) >= e->minor))) {
00128 break;
00129 }
00130 e++;
00131 }
00132 if (!e->name)
00133 #ifdef TEST
00134 fprintf(stderr, "(unknown device)\n");
00135 #endif
00136
00137 return snprintf (buf, n, "%s", path);
00138
00139 strcat (buf, "/dev/");
00140
00141 switch (e->type)
00142 {
00143 case ENTRY_TYPE_ONE:
00144 ret = di_snprintfcat (buf, n, "%s", e->name);
00145 break;
00146
00147 case ENTRY_TYPE_NUMBER:
00148 disc = minor (s.st_rdev) - e->minor + e->entry_first;
00149
00150 ret = di_snprintfcat (buf, n, "%s%d", e->name, disc);
00151 break;
00152
00153 case ENTRY_TYPE_DISC:
00154 case ENTRY_TYPE_DISC_ARRAY:
00155 disc = (minor (s.st_rdev) >> e->entry_disc_minor_shift);
00156 part = (minor (s.st_rdev) & ((1 << e->entry_disc_minor_shift) - 1));
00157
00158 switch (e->type)
00159 {
00160 case ENTRY_TYPE_DISC:
00161 disc += e->entry_first;
00162
00163 if (disc + 'a' > 'z')
00164 {
00165 disc -= 26;
00166 ret = di_snprintfcat (buf, n, "%s%c%c", e->name, 'a' + disc / 26, 'a' + disc % 26);
00167 }
00168 else
00169 ret = di_snprintfcat (buf, n, "%s%c", e->name, 'a' + disc);
00170
00171 if (part)
00172 ret = di_snprintfcat (buf, n, "%d", part);
00173
00174 break;
00175 case ENTRY_TYPE_DISC_ARRAY:
00176 ret = di_snprintfcat (buf, n, "%s/c%dd%d", e->name, e->entry_first, disc);
00177
00178 if (part)
00179 ret = di_snprintfcat (buf, n, "p%d", part);
00180
00181 break;
00182 default:
00183 break;
00184 }
00185 break;
00186 };
00187
00188 return ret;
00189 }