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annotate toys/pending/lspci.c @ 986:69adf14d70e1

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System V style init, submitted by Kyungwan Han.
author Rob Landley <rob@landley.net>
date Sun, 04 Aug 2013 00:31:27 -0500
parents f84dd3473233
children 8caeba551a28
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * lspci - written by Isaac Dunham
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3
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4 USE_LSPCI(NEWTOY(lspci, "emkns:", TOYFLAG_USR|TOYFLAG_BIN))
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5
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6 config LSPCI
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7 bool "lspci"
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8 default n
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9 help
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10 usage: lspci [-ekmn]
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11
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12 List PCI devices.
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13 -e Print all 6 digits in class (like elspci)
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14 -k Print kernel driver
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15 -m Machine parseable format
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16 -n Numeric output (default)
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17 */
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18 #define FOR_lspci
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19 #include "toys.h"
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20
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21 int do_lspci(struct dirtree *new)
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22 {
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23 int alen = 8, dirfd;
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24 char *dname = dirtree_path(new, &alen);
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25 struct {
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26 char class[16], vendor[16], device[16], module[256];
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27 } *bufs = (void*)(toybuf + 2);
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28
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29 if (!strcmp("/sys/bus/pci/devices", dname)) return DIRTREE_RECURSE;
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30 errno = 0;
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31 dirfd = open(dname, O_RDONLY);
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32 if (dirfd > 0) {
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33 char *p, **fields = (char*[]){"class", "vendor", "device", ""};
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34
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35 for (p = toybuf; **fields; p+=16, fields++) {
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36 int fd, size;
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37
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38 if ((fd = openat(dirfd, *fields, O_RDONLY)) < 0) continue;
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39 size = ((toys.optflags & FLAG_e) && (p == toybuf)) ? 8 : 6;
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40 p[read(fd, p, size)] = '\0';
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41 close(fd);
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42 }
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43
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44 close(dirfd);
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45 if (!errno) {
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46 char *driver = "";
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47 char *fmt = toys.optflags & FLAG_m ? "%s, \"%s\" \"%s\" \"%s\" \"%s\"\n"
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48 : "%s Class %s: %s:%s %s\n";
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49
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50 if (toys.optflags & FLAG_k) {
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51 strcat(dname, "/driver");
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52 if (readlink(dname, bufs->module, sizeof(bufs->module)) != -1)
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53 driver = basename(bufs->module);
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54 }
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55 printf(fmt, new->name + 5, bufs->class, bufs->vendor, bufs->device,
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56 driver);
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57 }
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58 }
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59 return 0;
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60 }
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61
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62 void lspci_main(void)
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63 {
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64 dirtree_read("/sys/bus/pci/devices", do_lspci);
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65 }