1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/* $Id: exec.c,v 1.13 2004/03/03 03:47:04 reinelt Exp $
*
* exec ('x*') functions
*
* Copyright 2001 Leopold T�tsch <lt@toetsch.at>
*
* This file is part of LCD4Linux.
*
* LCD4Linux is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* LCD4Linux is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*
* $Log: exec.c,v $
* Revision 1.13 2004/03/03 03:47:04 reinelt
* big patch from Martin Hejl:
* - use qprintf() where appropriate
* - save CPU cycles on gettimeofday()
* - add quit() functions to free allocated memory
* - fixed lots of memory leaks
*
* Revision 1.12 2004/01/29 04:40:02 reinelt
* every .c file includes "config.h" now
*
* Revision 1.11 2004/01/09 04:16:06 reinelt
* added 'section' argument to cfg_get(), but NULLed it on all calls by now.
*
* Revision 1.10 2003/10/05 17:58:50 reinelt
* libtool junk; copyright messages cleaned up
*
* Revision 1.9 2003/02/22 07:53:10 reinelt
* cfg_get(key,defval)
*
* Revision 1.8 2003/02/05 04:31:38 reinelt
*
* T_EXEC: remove trailing CR/LF
* T_EXEC: deactivated maxlen calculation (for I don't understand what it is for :-)
*
* Revision 1.7 2002/04/29 11:00:28 reinelt
*
* added Toshiba T6963 driver
* added ndelay() with nanosecond resolution
*
* Revision 1.6 2001/03/15 09:13:22 ltoetsch
* delay first exec for faster start
*
* Revision 1.5 2001/03/13 08:34:15 reinelt
*
* corrected a off-by-one bug with sensors
*
* Revision 1.4 2001/03/09 14:24:49 ltoetsch
* exec: Scale_x ->Min/Max_x
*
* 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
*
* Revision 1.1 2001/03/07 18:10:21 ltoetsch
* 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
* Max_x1 .. 9 max for scaling bars (100)
* Min_x1 .. 9 min for scaling bars (0)
*/
#include "config.h"
#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], double *val)
{
static time_t now[EXECS+1];
static int errs[EXECS+1];
static int ticks[EXECS+1];
char *command, *strticks;
char xn[20];
char env[EXEC_TXT_LEN];
FILE *pipe;
size_t len;
int i;
if (index < 0 || index > EXECS)
return -1;
if (errs[index])
return -1;
/* first time ? */
if (now[index] == 0) { /* not first time, to give faster a chance */
now[index] = -1;
return 0;
}
if (now[index] > 0) {
/* delay in Ticks ? */
sprintf(xn, "Tick_x%d", index);
strticks = cfg_get(NULL, xn, NULL);
if (p && *p) {
if (ticks[index]++ % atoi(strticks) != 0) {
free(strticks);
return 0;
}
free(strticks);
}
else {
free(strticks);
sprintf(xn, "Delay_x%d", index);
/* delay in Delay_x* sec ? */
if (time(NULL) <= now[index] + atoi(cfg_get(NULL, xn, "1"))) {
return 0;
}
}
}
time(&now[index]);
*val = -1;
sprintf(xn, "x%d", index);
command = cfg_get(NULL, xn, NULL);
if (!command || !*command) {
error("Empty command for 'x%d'", index);
errs[index]++;
if (command) free(command);
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("Couldn't run pipe '%s':\n%s", command, strerror(errno));
errs[index]++;
free(command);
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';
free(command);
return -1;
}
pclose(pipe);
buff[len] = '\0';
// remove trailing CR/LF
while (buff[len-1]=='\n' || buff[len-1]=='\r') {
buff[--len]='\0';
}
debug("%s: <%s> = '%s'",xn,command,buff);
if (isdigit(*buff)) {
double max, min;
*val = atof(buff);
sprintf(xn, "Max_x%d", index);
max = atof(cfg_get(NULL, xn, "100"));
sprintf(xn, "Min_x%d", index);
min = atof(cfg_get(NULL, xn, "0"));
if (max != min)
*val = (*val - min)/(max - min);
}
free(command);
return 0;
}
|
