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/*
* lspci - written by Isaac Dunham
USE_LSPCI(NEWTOY(lspci, "emkn@", TOYFLAG_USR|TOYFLAG_BIN))
config LSPCI
bool "lspci"
default n
help
usage: lspci [-ekmn@]
List PCI devices.
-e Print all 6 digits in class (like elspci)
-k Print kernel driver
-m Machine parseable format
-n Numeric output
config LSPCI_TEXT
bool "lspci readable output"
depends on LSPCI
default n
help
lspci without -n prints readable descriptions;
lspci -nn prints both readable and numeric description
*/
#define FOR_lspci
#include "toys.h"
extern int find_in_db(char * , char * , FILE * , char * , char * );
GLOBALS(
long numeric;
FILE * db;
)
char * id_check_match(char * id, char * buf)
{
int i = 0;
while (id[i]) {
if (id[i] == buf[i]) {
i++;
} else {
return (char *)0L;
}
}
return (buf + i + 2);
}
/*
* In: vendid, devid, fil
* Out: vname, devname
* Out must be zeroed before use.
* vmame and devname must be char[256], zeroed out
* Returns (2 - number of IDs matched): vendor must be matched for
* dev to be matched
*/
int find_in_db(char * vendid, char * devid, FILE * fil,
char * vname, char * devname)
{
fseek(fil, 0, SEEK_SET);
char buf[256], *vtext = 0L, *dtext = 0L;
while (!(vname[0])) {
//loop through
if (fgets(buf, 255, fil)==NULL) return 2;
if ((vtext = id_check_match(vendid, buf)))
strncpy(vname, vtext, strlen(vtext) - 1);
}
while (!(devname[0])) {
if ((fgets(buf, 255, fil)==NULL) || (buf[0] != '\t' ))
return 1;
if ((dtext = id_check_match(devid, buf + 1)))
strncpy(devname, dtext, strlen(dtext) - 1);
}
return 0; /* Succeeded in matching both */
}
int do_lspci(struct dirtree *new)
{
int alen = 8, dirfd, res = 2; //no textual descriptions read
char *dname = dirtree_path(new, &alen);
memset(toybuf, 0, 4096);
struct {
char class[16], vendor[16], device[16], module[256],
vname[256], devname[256];
} *bufs = (void*)(toybuf + 2);
if (!strcmp("/sys/bus/pci/devices", dname)) return DIRTREE_RECURSE;
errno = 0;
dirfd = open(dname, O_RDONLY);
if (dirfd > 0) {
char *p, **fields = (char*[]){"class", "vendor", "device", ""};
for (p = toybuf; **fields; p+=16, fields++) {
int fd, size;
if ((fd = openat(dirfd, *fields, O_RDONLY)) < 0) continue;
size = ((toys.optflags & FLAG_e) && (p == toybuf)) ? 8 : 6;
p[read(fd, p, size)] = '\0';
close(fd);
}
close(dirfd);
if (!errno) {
char *driver = "";
char *fmt = toys.optflags & FLAG_m ? "%s, \"%s\" \"%s\" \"%s\" \"%s\"\n"
: "%s Class %s: %s:%s %s\n";
if (toys.optflags & FLAG_k) {
strcat(dname, "/driver");
if (readlink(dname, bufs->module, sizeof(bufs->module)) != -1)
driver = basename(bufs->module);
}
if (CFG_LSPCI_TEXT && (TT.numeric != 1)) {
res = find_in_db(bufs->vendor, bufs->device, TT.db,
bufs->vname, bufs->devname);
}
if (CFG_LSPCI_TEXT && (TT.numeric == 2)) {
fmt = toys.optflags & FLAG_m
? "%s, \"%s\" \"%s [%s]\" \"%s [%s]\" \"%s\"\n"
: "%s Class %s: %s [%s] %s [%s] %s\n";
printf(fmt, new->name + 5, bufs->class, bufs->vname, bufs->vendor,
bufs->devname, bufs->device, driver);
} else {
printf(fmt, new->name + 5, bufs->class,
(res < 2) ? bufs->vname : bufs->vendor,
!(res) ? bufs->devname : bufs->device, driver);
}
}
}
return 0;
}
void lspci_main(void)
{
if (CFG_LSPCI_TEXT && (TT.numeric != 1)) {
TT.db = fopen("/usr/share/misc/pci.ids", "r");
if (errno) {
TT.numeric = 1;
error_msg("could not open PCI ID db");
}
}
dirtree_read("/sys/bus/pci/devices", do_lspci);
}
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