dtv-scan-tables.git - dtv-scan-tables Debian packaging

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1 files changed, 21 insertions, 4 deletions

/* $Id: exec.c,v 1.11 2004/01/09 04:16:06 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 1.11 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 <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, *p; 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); p = cfg_get(NULL, xn, NULL); 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(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]++; 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]++; 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; } 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); } return 0; }


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