Initial fork from https://git.suckless.org/slstatus

Changes to be committed:
    new file:   LICENSE
    new file:   Makefile
    new file:   README
    new file:   arg.h
    new file:   components/battery.c
    new file:   components/cat.c
    new file:   components/cpu.c
    new file:   components/datetime.c
    new file:   components/disk.c
    new file:   components/entropy.c
    new file:   components/hostname.c
    new file:   components/ip.c
    new file:   components/kernel_release.c
    new file:   components/keyboard_indicators.c
    new file:   components/keymap.c
    new file:   components/load_avg.c
    new file:   components/netspeeds.c
    new file:   components/num_files.c
    new file:   components/ram.c
    new file:   components/run_command.c
    new file:   components/swap.c
    new file:   components/temperature.c
    new file:   components/uptime.c
    new file:   components/user.c
    new file:   components/volume.c
    new file:   components/wifi.c
    new file:   config.def.h
    new file:   config.mk
    new file:   slstatus.1
    new file:   slstatus.c
    new file:   slstatus.h
    new file:   util.c
    new file:   util.h

1 files changed, 31 insertions, 0 deletions

diff --git a/components/run_command.c b/components/run_command.c
new file mode 100644
index 0000000..93bf6da
--- /dev/null
+++ b/components/run_command.c
@@ -0,0 +1,31 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <string.h>
+
+#include "../slstatus.h"
+#include "../util.h"
+
+const char *
+run_command(const char *cmd)
+{
+	char *p;
+	FILE *fp;
+
+	if (!(fp = popen(cmd, "r"))) {
+		warn("popen '%s':", cmd);
+		return NULL;
+	}
+
+	p = fgets(buf, sizeof(buf) - 1, fp);
+	if (pclose(fp) < 0) {
+		warn("pclose '%s':", cmd);
+		return NULL;
+	}
+	if (!p)
+		return NULL;
+
+	if ((p = strrchr(buf, '\n')))
+		p[0] = '\0';
+
+	return buf[0] ? buf : NULL;
+}