1 /*
2 * lspci - written by Isaac Dunham
3
4 USE_LSPCI(NEWTOY(lspci, "emkn"USE_LSPCI_TEXT("@i:"), TOYFLAG_USR|TOYFLAG_BIN))
5
6 config LSPCI
7 bool "lspci"
8 default y
9 help
10 usage: lspci [-ekm]
11
12 List PCI devices.
13
14 -e Print all 6 digits in class
15 -k Print kernel driver
16 -m Machine parseable format
17
18 config LSPCI_TEXT
19 bool "lspci readable output"
20 depends on LSPCI
21 default y
22 help
23 usage: lspci [-n] [-i FILE ]
24
25 -n Numeric output (repeat for readable and numeric)
26 -i PCI ID database (default /usr/share/misc/pci.ids)
27
28 */
29
30 #define FOR_lspci
31 #include "toys.h"
32
GLOBALS(char * ids;long numeric;FILE * db;)33 GLOBALS(
34 char *ids;
35 long numeric;
36
37 FILE *db;
38 )
39
40 static int do_lspci(struct dirtree *new)
41 {
42 char *p = toybuf, *vendor = toybuf+9, *device = toybuf+18,
43 driver[256], *vbig = 0, *dbig = 0, **fields;
44 int dirfd;
45
46 if (!new->parent) return DIRTREE_RECURSE;
47
48 // Parse data out of /proc
49
50 if (-1 == (dirfd = openat(dirtree_parentfd(new), new->name, O_RDONLY)))
51 return 0;
52
53 // it's ok for the driver link not to be there, whatever fortify says
54 *driver = 0;
55 if (toys.optflags & FLAG_k)
56 if (readlinkat(dirfd, "driver", driver, sizeof(driver))) {};
57
58 for (fields = (char*[]){"class", "vendor", "device", 0}; *fields; fields++) {
59 int fd, size = 6 + 2*((toys.optflags & FLAG_e) && p == toybuf);
60 *p = 0;
61
62 if (-1 == (fd = openat(dirfd, *fields, O_RDONLY))) {
63 close(dirfd);
64 return 0;
65 }
66 xreadall(fd, p, size);
67 memmove(p, p+2, size -= 2);
68 p[size] = 0;
69 close(fd);
70 p += 9;
71 }
72
73 close(dirfd);
74
75 // Lookup/display data from pci.ids?
76
77 if (CFG_LSPCI_TEXT && TT.db) {
78 if (TT.numeric != 1) {
79 char *s;
80
81 fseek(TT.db, 0, SEEK_SET);
82 while (!vbig || !dbig) {
83 s = p;
84 if (!fgets(s, sizeof(toybuf)-(p-toybuf)-1, TT.db)) break;
85 while (isspace(*s)) s++;
86 if (*s == '#') continue;
87 if (vbig && s == p) break;
88 if (strstart(&s, vbig ? device : vendor)) {
89 if (vbig) dbig = s+2;
90 else vbig = s+2;
91 s += strlen(s);
92 s[-1] = 0; // trim ending newline
93 p = s + 1;
94 }
95 }
96 }
97
98 if (TT.numeric > 1) {
99 printf((toys.optflags & FLAG_m)
100 ? "%s, \"%s\" \"%s [%s]\" \"%s [%s]\""
101 : "%s Class %s: %s [%s] %s [%s]",
102 new->name+5, toybuf, vbig ? vbig : "", vendor,
103 dbig ? dbig : "", device);
104
105 goto driver;
106 }
107 }
108
109 printf((toys.optflags & FLAG_m) ? "%s \"%s\" \"%s\" \"%s\""
110 : "%s Class %s: %s:%s", new->name+5, toybuf,
111 vbig ? vbig : vendor, dbig ? dbig : device);
112
113 driver:
114 if (*driver)
115 printf((toys.optflags & FLAG_m) ? " \"%s\"" : " %s", basename(driver));
116 xputc('\n');
117
118 return 0;
119 }
120
lspci_main(void)121 void lspci_main(void)
122 {
123 if (CFG_LSPCI_TEXT && TT.numeric != 1) {
124 if (!TT.ids) TT.ids = "/usr/share/misc/pci.ids";
125 if (!(TT.db = fopen(TT.ids, "r")))
126 perror_msg("could not open PCI ID db");
127 }
128
129 dirtree_read("/sys/bus/pci/devices", do_lspci);
130 }
131