config.h

more flexible parsing for /proc/meminfo to take shared and reclaimable
memory into account. this matches the output with free(1).

additionally this could fix some corner cases, as the order of fields in
/proc/meminfo is not strictly defined.

slstatus:
percent 81% free 2.5 Gi total 23.4 Gi used 19.0 Gi

free(1):
               total        used        free      shared  buff/cache   available
Mem:            23Gi        19Gi       2.5Gi       1.3Gi       3.2Gi       3.6Gi

LICENSE

@@ -1,6 +1,6 @@
 ISC License
 
-Copyright 2016-2022 Aaron Marcher <me@drkhsh.at>
+Copyright 2016-2025 Aaron Marcher <me@drkhsh.at>
 
 Copyright 2016 Roy Freytag <rfreytag@hs-mittweida.de>
 Copyright 2016 Vincent Loupmon <vincentloupmon@gmail.com>
@@ -21,7 +21,7 @@ Copyright 2018 Ian Remmler <ian@remmler.org>
 Copyright 2016-2019 Joerg Jung <jung@openbsd.org>
 Copyright 2019 Ryan Kes <alrayyes@gmail.com>
 Copyright 2019 Cem Keylan <cem@ckyln.com>
-Copyright 2019 Dimitris Papastamos <dsp@2f30.org>
+Copyright 2019 Spiros Thanasoulas <dsp@2f30.org>
 Copyright 2019-2022 Ingo Feinerer <feinerer@logic.at>
 Copyright 2020 Alexandre Ratchov <alex@caoua.org>
 Copyright 2020 Mart Lubbers <mart@martlubbers.net>
@@ -29,6 +29,9 @@ Copyright 2020 Daniel Moch <daniel@danielmoch.com>
 Copyright 2022 Nickolas Raymond Kaczynski <nrk@disroot.org>
 Copyright 2022 Patrick Iacob <iacobp@oregonstate.edu>
 Copyright 2021-2022 Steven Ward <planet36@gmail.com>
+Copyright 2025 Joakim Sindholt <opensource@zhasha.com>
+Copyright 2025 Al <eirann@disroot.org>
+Copyright 2025 sewn <sewn@disroot.org>
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted, provided that the above

README

@@ -18,7 +18,7 @@ Features
 - Available entropy
 - Username/GID/UID
 - Hostname
-- IP address (IPv4 and IPv6)
+- IP address (IPv4 and IPv6), interface status
 - Kernel version
 - Keyboard indicators
 - Keymap
@@ -63,9 +63,3 @@ Configuration
 -------------
 slstatus can be customized by creating a custom config.h and (re)compiling the
 source code. This keeps it fast, secure and simple.
-
-
-Upcoming
---------
-A first feature-complete release with official packages for common distributions
-will come soon.

components/ip.c

@@ -1,6 +1,7 @@
 /* See LICENSE file for copyright and license details. */
 #include <ifaddrs.h>
 #include <netdb.h>
+#include <net/if.h>
 #include <stdio.h>
 #include <string.h>
 #if defined(__OpenBSD__)
@@ -59,3 +60,28 @@ ipv6(const char *interface)
 {
 	return ip(interface, AF_INET6);
 }
+
+const char *
+up(const char *interface)
+{
+	struct ifaddrs *ifaddr, *ifa;
+
+	if (getifaddrs(&ifaddr) < 0) {
+		warn("getifaddrs:");
+		return NULL;
+	}
+
+	for (ifa = ifaddr; ifa != NULL; ifa = ifa->ifa_next) {
+		if (!ifa->ifa_addr)
+			continue;
+
+		if (!strcmp(ifa->ifa_name, interface)) {
+			freeifaddrs(ifaddr);
+			return ifa->ifa_flags & IFF_UP ? "up" : "down";
+		}
+	}
+
+	freeifaddrs(ifaddr);
+
+	return NULL;
+}

components/keymap.c

@@ -29,8 +29,8 @@ get_layout(char *syms, int grp_num)
 	int grp;
 
 	layout = NULL;
-	tok = strtok(syms, "+:");
+	tok = strtok(syms, "+:_");
-	for (grp = 0; tok && grp <= grp_num; tok = strtok(NULL, "+:")) {
+	for (grp = 0; tok && grp <= grp_num; tok = strtok(NULL, "+:_")) {
 		if (!valid_layout_or_variant(tok)) {
 			continue;
 		} else if (strlen(tok) == 1 && isdigit(tok[0])) {

components/ram.c

@@ -11,36 +11,45 @@
 	ram_free(const char *unused)
 	{
 		uintmax_t free;
+		FILE *fp;
 
-		if (pscanf("/proc/meminfo",
+		if (!(fp = fopen("/proc/meminfo", "r")))
-		           "MemTotal: %ju kB\n"
-		           "MemFree: %ju kB\n"
-		           "MemAvailable: %ju kB\n",
-		           &free, &free, &free) != 3)
 			return NULL;
 
+		if (lscanf(fp, "MemFree:", "%ju kB", &free) != 1) {
+			fclose(fp);
+			return NULL;
+		}
+
+		fclose(fp);
 		return fmt_human(free * 1024, 1024);
 	}
 
 	const char *
 	ram_perc(const char *unused)
 	{
-		uintmax_t total, free, buffers, cached;
+		uintmax_t total, free, buffers, cached, shmem, sreclaimable;
 		int percent;
+		FILE *fp;
 
-		if (pscanf("/proc/meminfo",
+		if (!(fp = fopen("/proc/meminfo", "r")))
-		           "MemTotal: %ju kB\n"
-		           "MemFree: %ju kB\n"
-		           "MemAvailable: %ju kB\n"
-		           "Buffers: %ju kB\n"
-		           "Cached: %ju kB\n",
-		           &total, &free, &buffers, &buffers, &cached) != 5)
 			return NULL;
 
+		if (lscanf(fp, "MemTotal:", "%ju kB", &total)  != 1 ||
+		    lscanf(fp, "MemFree:", "%ju kB", &free)    != 1 ||
+		    lscanf(fp, "Buffers:", "%ju kB", &buffers) != 1 ||
+		    lscanf(fp, "Cached:", "%ju kB", &cached)   != 1 ||
+		    lscanf(fp, "Shmem:", "%ju kB", &shmem)     != 1 ||
+		    lscanf(fp, "SReclaimable:", "%ju kB", &sreclaimable) != 1) {
+			fclose(fp);
+			return NULL;
+		}
+		fclose(fp);
+
 		if (total == 0)
 			return NULL;
 
-		percent = 100 * ((total - free) - (buffers + cached)) / total;
+		percent = 100 * (total - free - buffers - cached - sreclaimable + shmem) / total;
 		return bprintf("%d", percent);
 	}
 
@@ -59,18 +68,24 @@
 	const char *
 	ram_used(const char *unused)
 	{
-		uintmax_t total, free, buffers, cached, used;
+		uintmax_t total, free, buffers, cached, used, shmem, sreclaimable;
+		FILE *fp;
 
-		if (pscanf("/proc/meminfo",
+		if (!(fp = fopen("/proc/meminfo", "r")))
-		           "MemTotal: %ju kB\n"
-		           "MemFree: %ju kB\n"
-		           "MemAvailable: %ju kB\n"
-		           "Buffers: %ju kB\n"
-		           "Cached: %ju kB\n",
-		           &total, &free, &buffers, &buffers, &cached) != 5)
 			return NULL;
 
-		used = (total - free - buffers - cached);
+		if (lscanf(fp, "MemTotal:", "%ju kB", &total)  != 1 ||
+		    lscanf(fp, "MemFree:", "%ju kB", &free)    != 1 ||
+		    lscanf(fp, "Buffers:", "%ju kB", &buffers) != 1 ||
+		    lscanf(fp, "Cached:", "%ju kB", &cached)   != 1 ||
+		    lscanf(fp, "Shmem:", "%ju kB", &shmem)     != 1 ||
+		    lscanf(fp, "SReclaimable:", "%ju kB", &sreclaimable) != 1) {
+			fclose(fp);
+			return NULL;
+		}
+		fclose(fp);
+
+		used = total - free - buffers - cached - sreclaimable + shmem;
 		return fmt_human(used * 1024, 1024);
 	}
 #elif defined(__OpenBSD__)

components/wifi.c

@@ -15,86 +15,232 @@
 			(2 * (rssi + 100)))
 
 #if defined(__linux__)
-	#include <limits.h>
+	#include <stdint.h>
-	#include <linux/wireless.h>
+	#include <net/if.h>
+	#include <linux/netlink.h>
+	#include <linux/genetlink.h>
+	#include <linux/nl80211.h>
 
-	#define NET_OPERSTATE "/sys/class/net/%s/operstate"
+	static int nlsock = -1;
+	static uint32_t seq = 1;
+	static char resp[4096];
 
-	const char *
+	static char *
-	wifi_perc(const char *interface)
+	findattr(int attr, const char *p, const char *e, size_t *len)
 	{
-		int cur;
+		while (p < e) {
-		size_t i;
+			struct nlattr nla;
-		char *p, *datastart;
+			memcpy(&nla, p, sizeof(nla));
-		char path[PATH_MAX];
+			if (nla.nla_type == attr) {
-		char status[5];
+				*len = nla.nla_len - NLA_HDRLEN;
-		FILE *fp;
+				return (char *)(p + NLA_HDRLEN);
-
+			}
-		if (esnprintf(path, sizeof(path), NET_OPERSTATE, interface) < 0)
+			p += NLA_ALIGN(nla.nla_len);
-			return NULL;
-		if (!(fp = fopen(path, "r"))) {
-			warn("fopen '%s':", path);
-			return NULL;
 		}
-		p = fgets(status, 5, fp);
+		return NULL;
-		fclose(fp);
+	}
-		if (!p || strcmp(status, "up\n") != 0)
-			return NULL;
 
-		if (!(fp = fopen("/proc/net/wireless", "r"))) {
+	static uint16_t
-			warn("fopen '/proc/net/wireless':");
+	nl80211fam(void)
-			return NULL;
+	{
+		static const char family[] = "nl80211";
+		static uint16_t id;
+		ssize_t r;
+		size_t len;
+		char ctrl[NLMSG_HDRLEN+GENL_HDRLEN+NLA_HDRLEN+NLA_ALIGN(sizeof(family))] = {0}, *p = ctrl;
+
+		if (id)
+			return id;
+
+		memcpy(p, &(struct nlmsghdr){
+			.nlmsg_len = sizeof(ctrl),
+			.nlmsg_type = GENL_ID_CTRL,
+			.nlmsg_flags = NLM_F_REQUEST,
+			.nlmsg_seq = seq++,
+			.nlmsg_pid = 0,
+		}, sizeof(struct nlmsghdr));
+		p += NLMSG_HDRLEN;
+		memcpy(p, &(struct genlmsghdr){
+			.cmd = CTRL_CMD_GETFAMILY,
+			.version = 1,
+		}, sizeof(struct genlmsghdr));
+		p += GENL_HDRLEN;
+		memcpy(p, &(struct nlattr){
+			.nla_len = NLA_HDRLEN+sizeof(family),
+			.nla_type = CTRL_ATTR_FAMILY_NAME,
+		}, sizeof(struct nlattr));
+		p += NLA_HDRLEN;
+		memcpy(p, family, sizeof(family));
+
+		if (nlsock < 0)
+			nlsock = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
+		if (nlsock < 0) {
+			warn("socket 'AF_NETLINK':");
+			return 0;
 		}
+		if (send(nlsock, ctrl, sizeof(ctrl), 0) != sizeof(ctrl)) {
+			warn("send 'AF_NETLINK':");
+			return 0;
+		}
+		r = recv(nlsock, resp, sizeof(resp), 0);
+		if (r < 0) {
+			warn("recv 'AF_NETLINK':");
+			return 0;
+		}
+		if ((size_t)r <= sizeof(ctrl))
+			return 0;
+		p = findattr(CTRL_ATTR_FAMILY_ID, resp + sizeof(ctrl), resp + r, &len);
+		if (p && len == 2)
+			memcpy(&id, p, 2);
 
-		for (i = 0; i < 3; i++)
+		return id;
-			if (!(p = fgets(buf, sizeof(buf) - 1, fp)))
+	}
-				break;
 
-		fclose(fp);
+	static int
-		if (i < 2 || !p)
+	ifindex(const char *interface)
-			return NULL;
+	{
+		static struct ifreq ifr;
+		static int ifsock = -1;
 
-		if (!(datastart = strstr(buf, interface)))
+		if (ifsock < 0)
-			return NULL;
+			ifsock = socket(AF_UNIX, SOCK_DGRAM, 0);
-
+		if (ifsock < 0) {
-		datastart = (datastart+(strlen(interface)+1));
+			warn("socket 'AF_UNIX':");
-		sscanf(datastart + 1, " %*d   %d  %*d  %*d\t\t  %*d\t   "
+			return -1;
-		       "%*d\t\t%*d\t\t %*d\t  %*d\t\t %*d", &cur);
+		}
-
+		if (strcmp(ifr.ifr_name, interface) != 0) {
-		/* 70 is the max of /proc/net/wireless */
+			strcpy(ifr.ifr_name, interface);
-		return bprintf("%d", (int)((float)cur / 70 * 100));
+			if (ioctl(ifsock, SIOCGIFINDEX, &ifr) != 0) {
+				warn("ioctl 'SIOCGIFINDEX':");
+				return -1;
+			}
+		}
+		return ifr.ifr_ifindex;
 	}
 
 	const char *
 	wifi_essid(const char *interface)
 	{
-		static char id[IW_ESSID_MAX_SIZE+1];
+		uint16_t fam = nl80211fam();
-		int sockfd;
+		ssize_t r;
-		struct iwreq wreq;
+		size_t len;
-
+		char req[NLMSG_HDRLEN+GENL_HDRLEN+NLA_HDRLEN+NLA_ALIGN(4)] = {0}, *p = req;
-		memset(&wreq, 0, sizeof(struct iwreq));
+		int idx = ifindex(interface);
-		wreq.u.essid.length = IW_ESSID_MAX_SIZE+1;
+		if (!fam) {
-		if (esnprintf(wreq.ifr_name, sizeof(wreq.ifr_name), "%s",
+			fprintf(stderr, "nl80211 family not found\n");
-		              interface) < 0)
-			return NULL;
-
-		if ((sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-			warn("socket 'AF_INET':");
 			return NULL;
 		}
-		wreq.u.essid.pointer = id;
+		if (idx < 0) {
-		if (ioctl(sockfd,SIOCGIWESSID, &wreq) < 0) {
+			fprintf(stderr, "interface %s not found\n", interface);
-			warn("ioctl 'SIOCGIWESSID':");
-			close(sockfd);
 			return NULL;
 		}
 
-		close(sockfd);
+		memcpy(p, &(struct nlmsghdr){
+			.nlmsg_len = sizeof(req),
+			.nlmsg_type = fam,
+			.nlmsg_flags = NLM_F_REQUEST,
+			.nlmsg_seq = seq++,
+			.nlmsg_pid = 0,
+		}, sizeof(struct nlmsghdr));
+		p += NLMSG_HDRLEN;
+		memcpy(p, &(struct genlmsghdr){
+			.cmd = NL80211_CMD_GET_INTERFACE,
+			.version = 1,
+		}, sizeof(struct genlmsghdr));
+		p += GENL_HDRLEN;
+		memcpy(p, &(struct nlattr){
+			.nla_len = NLA_HDRLEN+4,
+			.nla_type = NL80211_ATTR_IFINDEX,
+		}, sizeof(struct nlattr));
+		p += NLA_HDRLEN;
+		memcpy(p, &(uint32_t){idx}, 4);
 
-		if (!strcmp(id, ""))
+		if (send(nlsock, req, sizeof(req), 0) != sizeof(req)) {
+			warn("send 'AF_NETLINK':");
 			return NULL;
+		}
+		r = recv(nlsock, resp, sizeof(resp), 0);
+		if (r < 0) {
+			warn("recv 'AF_NETLINK':");
+			return NULL;
+		}
 
-		return id;
+		if ((size_t)r <= NLMSG_HDRLEN + GENL_HDRLEN)
+			return NULL;
+		p = findattr(NL80211_ATTR_SSID, resp + NLMSG_HDRLEN + GENL_HDRLEN, resp + r, &len);
+		if (p)
+			p[len] = 0;
+
+		return p;
+	}
+
+	const char *
+	wifi_perc(const char *interface)
+	{
+		static char strength[4];
+		struct nlmsghdr hdr;
+		uint16_t fam = nl80211fam();
+		ssize_t r;
+		size_t len;
+		char req[NLMSG_HDRLEN + GENL_HDRLEN + NLA_HDRLEN + NLA_ALIGN(4)] = {0}, *p = req, *e;
+		int idx = ifindex(interface);
+
+		if (idx < 0) {
+			fprintf(stderr, "interface %s not found\n", interface);
+			return NULL;
+		}
+
+		memcpy(p, &(struct nlmsghdr){
+			.nlmsg_len = sizeof(req),
+			.nlmsg_type = fam,
+			.nlmsg_flags = NLM_F_REQUEST|NLM_F_DUMP,
+			.nlmsg_seq = seq++,
+			.nlmsg_pid = 0,
+		}, sizeof(struct nlmsghdr));
+		p += NLMSG_HDRLEN;
+		memcpy(p, &(struct genlmsghdr){
+			.cmd = NL80211_CMD_GET_STATION,
+			.version = 1,
+		}, sizeof(struct genlmsghdr));
+		p += GENL_HDRLEN;
+		memcpy(p, &(struct nlattr){
+			.nla_len = NLA_HDRLEN + 4,
+			.nla_type = NL80211_ATTR_IFINDEX,
+		}, sizeof(struct nlattr));
+		p += NLA_HDRLEN;
+		memcpy(p, &idx, 4);
+
+		if (send(nlsock, req, sizeof(req), 0) != sizeof(req)) {
+			warn("send 'AF_NETLINK':");
+			return NULL;
+		}
+
+		*strength = 0;
+		while (1) {
+			r = recv(nlsock, resp, sizeof(resp), 0);
+			if (r < 0) {
+				warn("recv 'AF_NETLINK':");
+				return NULL;
+			}
+			if ((size_t)r < sizeof(hdr))
+				return NULL;
+
+			for (p = resp; p != resp + r && (size_t)(resp + r-p) >= sizeof(hdr); p = e) {
+				memcpy(&hdr, p, sizeof(hdr));
+				e = resp + r - p < hdr.nlmsg_len ? resp + r : p + hdr.nlmsg_len;
+
+				if (!*strength && hdr.nlmsg_len > NLMSG_HDRLEN+GENL_HDRLEN) {
+					p += NLMSG_HDRLEN+GENL_HDRLEN;
+					p = findattr(NL80211_ATTR_STA_INFO, p, e, &len);
+					if (p)
+						p = findattr(NL80211_STA_INFO_SIGNAL_AVG, p, e, &len);
+					if (p && len == 1)
+						snprintf(strength, sizeof(strength), "%d", RSSI_TO_PERC(*p));
+				}
+				if (hdr.nlmsg_type == NLMSG_DONE)
+					return *strength ? strength : NULL;
+			}
+		}
 	}
 #elif defined(__OpenBSD__)
 	#include <net/if.h>

config.def.h

@@ -56,6 +56,7 @@ static const char unknown_str[] = "n/a";
  *                                                     thermal zone on FreeBSD
  *                                                     (tz0, tz1, etc.)
  * uid                 UID of current user             NULL
+ * up                  interface is running            interface name (eth0)
  * uptime              system uptime                   NULL
  * username            username of current user        NULL
  * vol_perc            OSS/ALSA volume in percent      mixer file (/dev/mixer)

config.h

@@ -0,0 +1,77 @@
+/* See LICENSE file for copyright and license details. */
+
+/* interval between updates (in ms) */
+const unsigned int interval = 1000;
+
+/* text to show if no value can be retrieved */
+static const char unknown_str[] = "n/a";
+
+/* maximum output string length */
+#define MAXLEN 2048
+
+/*
+ * function            description                     argument (example)
+ *
+ * battery_perc        battery percentage              battery name (BAT0)
+ *                                                     NULL on OpenBSD/FreeBSD
+ * battery_remaining   battery remaining HH:MM         battery name (BAT0)
+ *                                                     NULL on OpenBSD/FreeBSD
+ * battery_state       battery charging state          battery name (BAT0)
+ *                                                     NULL on OpenBSD/FreeBSD
+ * cat                 read arbitrary file             path
+ * cpu_freq            cpu frequency in MHz            NULL
+ * cpu_perc            cpu usage in percent            NULL
+ * datetime            date and time                   format string (%F %T)
+ * disk_free           free disk space in GB           mountpoint path (/)
+ * disk_perc           disk usage in percent           mountpoint path (/)
+ * disk_total          total disk space in GB          mountpoint path (/)
+ * disk_used           used disk space in GB           mountpoint path (/)
+ * entropy             available entropy               NULL
+ * gid                 GID of current user             NULL
+ * hostname            hostname                        NULL
+ * ipv4                IPv4 address                    interface name (eth0)
+ * ipv6                IPv6 address                    interface name (eth0)
+ * kernel_release      `uname -r`                      NULL
+ * keyboard_indicators caps/num lock indicators        format string (c?n?)
+ *                                                     see keyboard_indicators.c
+ * keymap              layout (variant) of current     NULL
+ *                     keymap
+ * load_avg            load average                    NULL
+ * netspeed_rx         receive network speed           interface name (wlan0)
+ * netspeed_tx         transfer network speed          interface name (wlan0)
+ * num_files           number of files in a directory  path
+ *                                                     (/home/foo/Inbox/cur)
+ * ram_free            free memory in GB               NULL
+ * ram_perc            memory usage in percent         NULL
+ * ram_total           total memory size in GB         NULL
+ * ram_used            used memory in GB               NULL
+ * run_command         custom shell command            command (echo foo)
+ * swap_free           free swap in GB                 NULL
+ * swap_perc           swap usage in percent           NULL
+ * swap_total          total swap size in GB           NULL
+ * swap_used           used swap in GB                 NULL
+ * temp                temperature in degree celsius   sensor file
+ *                                                     (/sys/class/thermal/...)
+ *                                                     NULL on OpenBSD
+ *                                                     thermal zone on FreeBSD
+ *                                                     (tz0, tz1, etc.)
+ * uid                 UID of current user             NULL
+ * up                  interface is running            interface name (eth0)
+ * uptime              system uptime                   NULL
+ * username            username of current user        NULL
+ * vol_perc            OSS/ALSA volume in percent      mixer file (/dev/mixer)
+ *                                                     NULL on OpenBSD/FreeBSD
+ * wifi_essid          WiFi ESSID                      interface name (wlan0)
+ * wifi_perc           WiFi signal in percent          interface name (wlan0)
+ */
+static const struct arg args[] = {
+	/* function format          argument */
+	{ datetime, "%s",           "%F %T" },
+	{ cpu_perc, " {%2s%%", NULL},
+	{ cpu_freq, " @%8sHz}", NULL},
+
+	{ wifi_essid, " << %s ",          "wlp3s0" },
+	{ wifi_perc, "@%3s%% >>",          "wlp3s0" },
+	{ battery_perc, " [[%3s%% ",          "BAT0" },
+	{ battery_remaining, "%7s ]]",          "BAT0" },
+};

config.mk

@@ -1,5 +1,5 @@
 # slstatus version
-VERSION = 0
+VERSION = 1.1
 
 # customize below to fit your system
 

slstatus.c

@@ -58,6 +58,7 @@ main(int argc, char *argv[])
 	ARGBEGIN {
 	case 'v':
 		die("slstatus-"VERSION);
+		break;
 	case '1':
 		done = 1;
 		/* FALLTHROUGH */

slstatus.h

@@ -30,6 +30,7 @@ const char *hostname(const char *unused);
 /* ip */
 const char *ipv4(const char *interface);
 const char *ipv6(const char *interface);
+const char *up(const char *interface);
 
 /* kernel_release */
 const char *kernel_release(const char *unused);

util.c

@@ -139,3 +139,20 @@ pscanf(const char *path, const char *fmt, ...)
 
 	return (n == EOF) ? -1 : n;
 }
+
+int
+lscanf(FILE *fp, const char *key, const char *fmt, void *res)
+{
+		int n;
+		char line[256];
+
+		n = -1;
+		while (fgets(line, sizeof(line), fp))
+			if (strncmp(line, key, strlen(key)) == 0) {
+				n = sscanf(line + strlen(key), fmt, res);
+				break;
+			}
+
+		rewind(fp);
+		return (n == 1) ? 1 : -1;
+}

util.h

@@ -1,5 +1,6 @@
 /* See LICENSE file for copyright and license details. */
 #include <stdint.h>
+#include <stdio.h>
 
 extern char buf[1024];
 
@@ -14,3 +15,4 @@ int esnprintf(char *str, size_t size, const char *fmt, ...);
 const char *bprintf(const char *fmt, ...);
 const char *fmt_human(uintmax_t num, int base);
 int pscanf(const char *path, const char *fmt, ...);
+int lscanf(FILE *fp, const char *key, const char *fmt, void *res);