![Laslo Hunhold](/assets/img/avatar_default.png)
Given slstatus is a tool that runs in the background, most likely run from .xinitrc, it's important to prepend the name of the tool to error messages so it becomes clear where the error is coming from. To make this much more consistent, this commit adds warn() and die() utility functions consistent with other suckless projects and adapts all calls to fprintf(stderr, *) to the warn() and die() functions, greatly increasing the readability of the code.
161 lines
3.4 KiB
C
161 lines
3.4 KiB
C
/* See LICENSE file for copyright and license details. */
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#include <errno.h>
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#include <ifaddrs.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <unistd.h>
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#include "../util.h"
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#if defined(__linux__)
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#include <limits.h>
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#include <linux/wireless.h>
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const char *
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wifi_perc(const char *iface)
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{
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int i, cur;
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int total = 70; /* the max of /proc/net/wireless */
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char *p, *datastart;
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char path[PATH_MAX];
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char status[5];
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FILE *fp;
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snprintf(path, sizeof(path), "%s%s%s", "/sys/class/net/", iface,
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"/operstate");
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if (!(fp = fopen(path, "r"))) {
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warn("fopen '%s':", path);
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return NULL;
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}
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p = fgets(status, 5, fp);
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fclose(fp);
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if(!p || strcmp(status, "up\n") != 0) {
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return NULL;
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}
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if (!(fp = fopen("/proc/net/wireless", "r"))) {
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warn("fopen '/proc/net/wireless':");
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return NULL;
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}
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for (i = 0; i < 3; i++) {
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if (!(p = fgets(buf, sizeof(buf) - 1, fp)))
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break;
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}
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fclose(fp);
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if (i < 2 || !p) {
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return NULL;
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}
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if (!(datastart = strstr(buf, iface))) {
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return NULL;
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}
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datastart = (datastart+(strlen(iface)+1));
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sscanf(datastart + 1, " %*d %d %*d %*d\t\t %*d\t "
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"%*d\t\t%*d\t\t %*d\t %*d\t\t %*d", &cur);
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return bprintf("%d", (int)((float)cur / total * 100));
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}
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const char *
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wifi_essid(const char *iface)
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{
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static char id[IW_ESSID_MAX_SIZE+1];
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int sockfd;
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struct iwreq wreq;
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memset(&wreq, 0, sizeof(struct iwreq));
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wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
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snprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s", iface);
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if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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warn("socket 'AF_INET':");
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return NULL;
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}
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wreq.u.essid.pointer = id;
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if (ioctl(sockfd,SIOCGIWESSID, &wreq) < 0) {
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warn("ioctl 'SIOCGIWESSID':");
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close(sockfd);
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return NULL;
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}
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close(sockfd);
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if (!strcmp(id, "")) {
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return NULL;
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}
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return id;
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}
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#elif defined(__OpenBSD__)
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#include <net/if.h>
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#include <net/if_media.h>
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#include <net80211/ieee80211.h>
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#include <sys/select.h> /* before <sys/ieee80211_ioctl.h> for NBBY */
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#include <net80211/ieee80211_ioctl.h>
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#include <stdlib.h>
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#include <sys/types.h>
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static int
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load_ieee80211_nodereq(const char *iface, struct ieee80211_nodereq *nr)
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{
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struct ieee80211_bssid bssid;
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int sockfd;
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memset(&bssid, 0, sizeof(bssid));
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memset(nr, 0, sizeof(struct ieee80211_nodereq));
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if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
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warn("socket 'AF_INET':");
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return 0;
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}
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strlcpy(bssid.i_name, iface, sizeof(bssid.i_name));
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if ((ioctl(sockfd, SIOCG80211BSSID, &bssid)) < 0) {
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warn("ioctl 'SIOCG80211BSSID':");
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close(sockfd);
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return 0;
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}
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strlcpy(nr->nr_ifname, iface, sizeof(nr->nr_ifname));
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memcpy(&nr->nr_macaddr, bssid.i_bssid, sizeof(nr->nr_macaddr));
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if ((ioctl(sockfd, SIOCG80211NODE, nr)) < 0 && nr->nr_rssi) {
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warn("ioctl 'SIOCG80211NODE':");
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close(sockfd);
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return 0;
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}
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return close(sockfd), 1;
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}
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const char *
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wifi_perc(const char *iface)
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{
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struct ieee80211_nodereq nr;
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int q;
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if (load_ieee80211_nodereq(iface, &nr)) {
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if (nr.nr_max_rssi) {
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q = IEEE80211_NODEREQ_RSSI(&nr);
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} else {
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q = nr.nr_rssi >= -50 ? 100 : (nr.nr_rssi <= -100 ? 0 :
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(2 * (nr.nr_rssi + 100)));
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}
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return bprintf("%d", q);
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}
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return NULL;
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}
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const char *
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wifi_essid(const char *iface)
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{
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struct ieee80211_nodereq nr;
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if (load_ieee80211_nodereq(iface, &nr)) {
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return bprintf("%s", nr.nr_nwid);
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}
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return NULL;
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}
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#endif
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