questd: tools.c with helpful functions

questd/src/Makefile

@@ -2,8 +2,8 @@ CC		= gcc
 CFLAGS		= -g -Wall
 LOCLIBS		= 
 LIBS		= -luci -lubus -lubox -lpthread
-OBJS		= questd.o dumper.o port.o arping.o usb.o ndisc.o dslstats.o 
+OBJS		= questd.o dumper.o port.o arping.o usb.o ndisc.o dslstats.o tools.o
-SRCS		= questd.c dumper.c port.c arping.c usb.c ndisc.c dslstats.c 
+SRCS		= questd.c dumper.c port.c arping.c usb.c ndisc.c dslstats.c tools.c
 LIBSRCS		= 
 ISRCS		= questd.h
 

questd/src/dumper.c

@@ -61,15 +61,6 @@ get_db_hw_value(char *opt, char **val)
 	*val = ptr.o->v.string;
 }
 
-void 
-remove_newline(char *buf)
-{
-	int len;
-	len = strlen(buf) - 1;
-	if (buf[len] == '\n') 
-		buf[len] = 0;
-}
-
 void
 get_jif_val(jiffy_counts_t *p_jif)
 {

questd/src/questd.h

@@ -175,6 +175,9 @@ void recalc_sleep_time(bool calc, int toms);
 void init_db_hw_config(void);
 bool arping(char *target, char *device, int toms);
 void remove_newline(char *buf);
+void replace_char(char *buf, char a, char b);
+void runCmd(const char *pFmt, ...);
+const char *chrCmd(const char *pFmt, ...);
 void get_jif_val(jiffy_counts_t *p_jif);
 void dump_keys(Key *keys);
 void dump_specs(Spec *spec);

questd/src/tools.c

@@ -0,0 +1,80 @@
+#include <string.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "questd.h"
+
+void 
+remove_newline(char *buf)
+{
+	int len;
+	len = strlen(buf) - 1;
+	if (buf[len] == '\n') 
+		buf[len] = 0;
+}
+
+void
+replace_char(char *buf, char a, char b)
+{
+	int i = 0;
+
+	while (buf[i]) {
+		if (buf[i] == a)
+			buf[i] = b;
+		i++;
+	}
+	buf[i] = '\0';
+}
+
+void
+runCmd(const char *pFmt, ...)
+{
+	va_list ap;
+	char cmd[256] = {0};
+	int len=0, maxLen;
+
+	maxLen = sizeof(cmd);
+
+	va_start(ap, pFmt);
+
+	if (len < maxLen)
+	{
+		maxLen -= len;
+		vsnprintf(&cmd[len], maxLen, pFmt, ap);
+	}
+
+	system(cmd);
+
+	va_end(ap);
+}
+
+const char*
+chrCmd(const char *pFmt, ...)
+{
+	va_list ap;
+	char cmd[256] = {0};
+	int len=0, maxLen;
+
+	maxLen = sizeof(cmd);
+
+	va_start(ap, pFmt);
+
+	if (len < maxLen)
+	{
+		maxLen -= len;
+		vsnprintf(&cmd[len], maxLen, pFmt, ap);
+	}
+
+	va_end(ap);
+
+	FILE *pipe;
+	char buffer[128];
+	if ((pipe = popen(cmd, "r")))
+		fgets(buffer, sizeof(buffer), pipe);
+	pclose(pipe);
+
+	if (strlen(buffer))
+		return strdup(buffer);
+	else
+		return NULL;
+}