133 lines
3.2 KiB
C
133 lines
3.2 KiB
C
/* vim: tabstop=4 shiftwidth=4 noexpandtab
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* This file is part of ToaruOS and is released under the terms
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* of the NCSA / University of Illinois License - see LICENSE.md
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* Copyright (C) 2018 K. Lange
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*
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* lspci - Print information about connected PCI devices.
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*
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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struct device_class {
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char * code;
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char * name;
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} device_classes[] = {
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{"0101", "IDE interface"},
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{"0102", "Floppy disk controller"},
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{"0105", "ATA controller"},
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{"0106", "SATA controller"},
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{"0200", "Ethernet controller"},
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{"0280", "Network controller"},
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{"0300", "VGA compatible controller"},
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{"0380", "Display controller"},
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{"0401", "Multimedia audio controller"},
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{"0403", "Audio device"},
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{"0480", "Multimedia controller"},
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{"0600", "Host bridge"},
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{"0601", "ISA bridge"},
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{"0604", "PCI bridge"},
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{"0680", "Bridge"},
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{"0880", "System peripheral"},
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{NULL, NULL},
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};
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static void show_usage(char * argv[]) {
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fprintf(stderr,
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"lspci - show information about PCI devices\n"
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"\n"
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"usage: %s [-n]\n"
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"\n"
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" -n \033[3mshow numeric device codes\033[0m\n"
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" -? \033[3mshow this help text\033[0m\n"
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"\n", argv[0]);
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}
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int main(int argc, char * argv[]) {
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int numeric = 0;
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int opt;
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while ((opt = getopt(argc, argv, "n?")) != -1) {
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switch (opt) {
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case '?':
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show_usage(argv);
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return 0;
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case 'n':
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numeric = 1;
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break;
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}
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}
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FILE * f = fopen("/proc/pci","r");
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if (!f) {
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fprintf(stderr, "%s: %s: %s\n", argv[0], "/proc/pci", strerror(errno));
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return 1;
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}
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while (!feof(f)) {
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char line[1024];
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fgets(line, 1024, f);
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if (line[0] == ' ' || line[0] == '\n') {
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/* Skip; don't care about this information */
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continue;
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}
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/* Read bus, etc. verbatim */
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char * device_bus = line;
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/* Read device class */
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char * device_class = strstr(line," (");
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if (!device_class) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_class = '\0';
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device_class++; /* space */
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device_class++; /* ( */
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char * device_vendor = strstr(device_class, ", ");
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if (!device_vendor) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_vendor = '\0';
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device_vendor++; /* comma */
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device_vendor++; /* space */
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char * device_code = strstr(device_vendor, ":");
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if (!device_code) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_code = '\0';
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device_code++; /* colon */
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char * device_name = strstr(device_code, ") ");
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if (!device_name) {
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fprintf(stderr, "%s: parse error\n", argv[0]);
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return 1;
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}
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*device_name = '\0';
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device_name++; /* ) */
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device_name++; /* space */
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char * linefeed = strstr(device_name, "\n");
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if (linefeed) *linefeed = '\0';
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if (numeric) {
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fprintf(stdout, "%s %s: %s:%s\n", device_bus, device_class, device_vendor, device_code);
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} else {
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for (struct device_class * c = device_classes; c->code; ++c) {
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if (!strcmp(device_class, c->code)) {
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device_class = c->name;
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break;
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}
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}
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/* TODO: We should also look up vendor + device names ourselves and possibly remove them from the kernel */
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fprintf(stdout, "%s %s: %s\n", device_bus, device_class, device_name);
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}
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}
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return 0;
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}
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