From 998fe30dc57559b00b4cef121ee45a0afd5c8d93 Mon Sep 17 00:00:00 2001
From: ltoetsch <>
Date: Thu, 8 Mar 2001 15:25:38 +0000
Subject: [lcd4linux @ 2001-03-08 15:25:38 by ltoetsch] improved exec

---
 exec.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 74 insertions(+), 15 deletions(-)

(limited to 'exec.c')

diff --git a/exec.c b/exec.c
index 2617206..3c7c8de 100644
--- a/exec.c
+++ b/exec.c
@@ -1,4 +1,4 @@
-/* $Id: exec.c,v 1.2 2001/03/08 08:39:54 reinelt Exp $
+/* $Id: exec.c,v 1.3 2001/03/08 15:25:38 ltoetsch Exp $
  *
  * exec ('x*') functions
  *
@@ -20,6 +20,9 @@
  *
  *
  * $Log: exec.c,v $
+ * Revision 1.3  2001/03/08 15:25:38  ltoetsch
+ * improved exec
+ *
  * Revision 1.2  2001/03/08 08:39:54  reinelt
  *
  * fixed two typos
@@ -28,43 +31,99 @@
  * added e(x)ec commands
  *
  *
+ * This implements the x1 .. x9 commands
+ * config options:
+ *   x1 .. x9      command to execute
+ *   Tick_x1 ... 9 delay in ticks
+ *   Delay_x1 .. 9 delay in seconds
+ *   Scale_x1 .. 9 scale for bars
  */
 
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <time.h>
+#include <ctype.h>
+#include <errno.h>
+#define IN_EXEC
 #include "exec.h"
 #include "debug.h"
 #include "cfg.h"
 
 
-int Exec(int index, char buff[EXEC_TXT_LEN])
+int Exec(int index, char buff[EXEC_TXT_LEN], double *val)
 {
-  static time_t now = 0;
-  char *command;
-  char xn[4];
+  static time_t now[EXECS+1];
+  static int errs[EXECS+1];
+  static int ticks[EXECS+1];
+  char *command, *p;
+  char xn[20];
+  char env[EXEC_TXT_LEN];
   FILE *pipe;
+  size_t len;
+  int i;
+
+  if (index < 1 || index > EXECS)
+    return -1; 
+  if (errs[index])
+    return -1;
   
-  if (time(NULL) <= now+EXEC_WAIT) 
-    return 0;
-  time(&now); 
+  /* first time ? */
+  if (now[index] != 0) {
+    /* delay in Ticks ? */
+    sprintf(xn, "Tick_x%d", index);
+    p = cfg_get(xn);
+    if (p && *p) {
+      if (ticks[index]++ % atoi(p) != 0)
+        return 0;
+    }
+    else {
+      sprintf(xn, "Delay_x%d", index);
+      /* delay in Delay_x* sec ? */
+      if (time(NULL) <= now[index] + atoi(cfg_get(xn)?:"1"))
+        return 0;
+    }
+  }
+  time(&now[index]); 
+  *val = -1;
   
   sprintf(xn, "x%d", index);
   command = cfg_get(xn);
-  debug("command%d = %s:%s",index,xn,command);
+  debug("%s:'%s'",xn,command);
 					    
-  if (!*command) {
+  if (!command || !*command) {
     error("Empty command for 'x%d'", index);
+    errs[index]++;
     return -1;
   }
-  
+  for (i = 1; i < index; i++) {
+    sprintf(env, "X%d=%.*s", i, EXEC_TXT_LEN-10, exec[i].s);
+    putenv(env);
+  }
+  putenv("PATH=/usr/local/bin:/usr/bin:/bin");
   pipe = popen(command, "r");
   if (pipe == NULL) {
-    error("Couln't run pipe '%s'", command);
+    error("Couldn't run pipe '%s':\n%s", command, strerror(errno));
+    errs[index]++;
+    return -1;
+  }
+  len = fread(buff, 1, EXEC_TXT_LEN-1,  pipe);
+  if (len <= 0) {
+    pclose(pipe);
+    error("Couldn't fread from pipe '%s', len=%d", command, len);
+    errs[index]++;
+    *buff = '\0';
     return -1;
   }
-  fread(buff, EXEC_TXT_LEN, 1, pipe);
-  fclose(pipe);
-  buff[EXEC_TXT_LEN-1] = '\0';
+  pclose(pipe);
+  buff[len] = '\0';
+  for (p = buff ; *p && isspace(*p); p++)
+    ;
+  if (isdigit(*p)) {
+    *val = atof(p);
+    sprintf(xn, "Scale_x%d", index);
+    *val /= atoi(cfg_get(xn)?:"100")?:100;
+  }
   return 0;
 }
 
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