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33#define FOR_blkid
34#include "toys.h"
35
36GLOBALS(
37 struct arg_list *s;
38 char *o;
39)
40
41struct fstype {
42 char *name;
43 uint64_t magic;
44 int magic_len, magic_offset, uuid_off, label_len, label_off;
45} static const fstypes[] = {
46 {"ext2", 0xEF53, 2, 1080, 1128, 16, 1144},
47 {"swap", 0x4341505350415753LL, 8, 4086, 1036, 15, 1052},
48
49
50 {"ntfs", 0x5346544e, 4, 3, 0x48, 0, 0},
51
52 {"adfs", 0xadf5, 2, 0xc00, 0,0,0},
53 {"bfs", 0x1badface, 4, 0, 0,0,0},
54 {"btrfs", 0x4D5F53665248425FULL, 8, 65600, 65803, 256, 65819},
55 {"cramfs", 0x28cd3d45, 4, 0, 0, 16, 48},
56 {"f2fs", 0xF2F52010, 4, 1024, 1132, 512, 0x47c},
57 {"jfs", 0x3153464a, 4, 32768, 32920, 16, 32904},
58 {"nilfs", 0x3434, 2, 1030, 1176, 80, 1192},
59 {"reiserfs", 0x724573496552ULL, 6, 8244, 8276, 16, 8292},
60 {"reiserfs", 0x724573496552ULL, 6, 65588, 65620, 16, 65636},
61 {"romfs", 0x2d6d6f72, 4, 0, 0,0,0},
62 {"squashfs", 0x73717368, 4, 0, 0,0,0},
63 {"xiafs", 0x012fd16d, 4, 572, 0,0,0},
64 {"xfs", 0x42534658, 4, 0, 32, 12, 108},
65 {"vfat", 0x3233544146ULL, 5, 82, 67, 11, 71},
66 {"vfat", 0x31544146, 4, 54, 39, 11, 43}
67};
68
69static void escape(char *str, int force)
70{
71 if (!force && str[strcspn(str, "\" \\\n\t$<>|&;`'~()!#?")]) force++;
72 if (!force) return xputsn(str);
73
74 putchar('"');
75 while (*str) {
76 if (strchr("\" \\", *str)) putchar('\\');
77 putchar(*str++);
78 }
79 putchar('"');
80}
81
82static void show_tag(char *key, char *value)
83{
84 int show = 0;
85 struct arg_list *al;
86
87 if (TT.s) {
88 for (al = TT.s; al; al = al->next) if (!strcmp(key, al->arg)) show = 1;
89 } else show = 1;
90
91 if (!show || !*value) return;
92 if (!strcasecmp(TT.o, "full") || !strcasecmp(TT.o, "export")) {
93 printf(" %s="+!(*TT.o=='f'), key);
94 escape(value, *TT.o=='f');
95 if (*TT.o=='e') xputc('\n');
96 } else if (!strcasecmp(TT.o, "value")) xputs(value);
97 else error_exit("bad -o %s", TT.o);
98}
99
100static void flagshow(char *s, char *name)
101{
102 if (*toys.optargs && strcmp(s, *toys.optargs)) return;
103 printf("%s\n", *toys.optargs ? name : s);
104 if (*toys.optargs) xexit();
105}
106
107static void do_blkid(int fd, char *name)
108{
109 int off, i, j, len;
110 char buf[128], *type, *s;
111
112 off = i = 0;
113
114 for (;;) {
115 int pass = 0;
116
117
118 len = readall(fd, toybuf, sizeof(toybuf));
119 if (len != sizeof(toybuf)) return;
120
121
122 for (i=0; i<ARRAY_LEN(fstypes); i++) {
123 uint64_t test;
124
125
126 if (fstypes[i].magic_offset > off+sizeof(toybuf)) {
127 pass++;
128 continue;
129 }
130 if (fstypes[i].magic_offset < off) continue;
131
132
133 test = 0;
134 for (j = 0; j < fstypes[i].magic_len; j++)
135 test += ((uint64_t)toybuf[j+fstypes[i].magic_offset-off])<<(8*j);
136 if (test == fstypes[i].magic) break;
137 }
138
139 if (i == ARRAY_LEN(fstypes)) {
140 off += len;
141 if (pass) continue;
142 return;
143 }
144 break;
145 }
146
147
148 type = fstypes[i].name;
149 if (!i) {
150 if (toybuf[1116]&4) type = "ext3";
151 if (toybuf[1120]&64) type = "ext4";
152 }
153
154
155 if (*toys.which->name == 'f') {
156 puts(type);
157 return;
158 }
159
160
161 if (!FLAG(L) && !FLAG(U)) {
162 if (!TT.o || !strcasecmp(TT.o, "full")) printf("%s:", name);
163 else if (!strcasecmp(TT.o, "export")) show_tag("DEVNAME", name);
164 }
165
166 len = fstypes[i].label_len;
167 if (!FLAG(U) && len) {
168 s = toybuf+fstypes[i].label_off-off;
169 if (!strcmp(type, "vfat")) {
170 show_tag("SEC_TYPE", "msdos");
171 while (len && s[len-1]==' ') len--;
172 if (strstart(&s, "NO NAME")) len=0;
173 }
174
175 if (len) {
176 if (!strcmp(type, "f2fs")) {
177
178
179 for (j=0; j<len; j++) {
180 buf[j] = s[2*j];
181 if (s[2*j+1]) buf[j]='?';
182 if (!buf[j]) break;
183 }
184 } else sprintf(buf, "%.*s", len, s);
185 if (FLAG(L)) return flagshow(buf, name);
186 show_tag("LABEL", buf);
187 }
188 }
189
190 len = fstypes[i].uuid_off;
191 if (!FLAG(L) && len) {
192 int uoff = len-off;
193
194
195 s = buf;
196 if (!strcmp(type, "ntfs")) {
197 for (j = 7; j >= 0; --j) s += sprintf(s, "%02X", toybuf[uoff+j]);
198 } else if (!strcmp(type, "vfat")) {
199 s += sprintf(s, "%02X%02X-%02X%02X", toybuf[uoff+3], toybuf[uoff+2],
200 toybuf[uoff+1], toybuf[uoff]);
201 } else {
202 for (j = 0; j < 16; j++)
203 s += sprintf(s, "-%02x"+!(0x550 & (1<<j)), toybuf[uoff+j]);
204 }
205
206 if (FLAG(U)) return flagshow(buf, name);
207 show_tag("UUID", buf);
208 }
209
210 if ((!strcmp(type, "ext3")||!strcmp(type,"ext4")) && !(toybuf[1120]&~0x12))
211 show_tag("SEC_TYPE", "ext2");
212
213 if (FLAG(U) || FLAG(L)) return;
214
215 show_tag("TYPE", type);
216 if (!strcasecmp(TT.o, "full")) xputc('\n');
217}
218
219void blkid_main(void)
220{
221 if (!TT.o) TT.o = "full";
222
223 if (*toys.optargs && !FLAG(L) && !FLAG(U)) loopfiles(toys.optargs, do_blkid);
224 else {
225 unsigned int ma, mi, sz, fd;
226 char name[32], device[5+32];
227 FILE *fp = xfopen("/proc/partitions", "r");
228
229 while (fgets(toybuf, sizeof(toybuf), fp)) {
230 if (sscanf(toybuf, " %u %u %u %31s", &ma, &mi, &sz, name) != 4)
231 continue;
232
233 sprintf(device, "/dev/%.20s", name);
234 if (-1 == (fd = open(device, O_RDONLY))) {
235 if (errno != ENOMEDIUM) perror_msg_raw(device);
236 } else {
237 do_blkid(fd, device);
238 close(fd);
239 }
240 }
241 if (CFG_TOYBOX_FREE) fclose(fp);
242 }
243
244 if (FLAG(L) || FLAG(U)) toys.exitval = 2;
245}
246
247void fstype_main(void)
248{
249 loopfiles(toys.optargs, do_blkid);
250}
251
