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dockapps/wmweather+/warnings.c
Doug Torrance 612921ae43 Remove trailing whitespace.
2014-10-05 19:18:49 +01:00

307 lines
9.3 KiB
C
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#include "config.h"
/* Copyright (C) 2002 Brad Jorsch <anomie@users.sourceforge.net>
This program 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 of the License, or
(at your option) any later version.
This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#if TM_IN_SYS_TIME
# if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
# else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
# endif
#else
#include <time.h>
#endif
#include <unistd.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <pcre.h>
#include "wmweather+.h"
#include "download.h"
#include "getLine.h"
#include "diff.h"
#include "die.h"
#include "subst.h"
/* Important variables */
static char *warning_filename1=NULL;
static char *warning_endptr1=NULL;
static char *filenames[]={
"tornado", "flash_flood>warning", "flash_flood>watch",
"flash_flood>statement", "flood>warning", "flood>coastal",
"flood>statement", "severe_weather_stmt", "special_weather_stmt",
"thunderstorm", "special_marine", "urgent_weather_message", "non_precip",
"fire_weather", "lake_shore", NULL
};
static char **reqs[sizeof(filenames)/sizeof(*filenames)-1][2];
unsigned long current_warnings;
static unsigned long *zone_current_warnings;
/* Regular Expressions */
static pcre *expires;
static int ovecsize;
/* prototypes */
static int check_warning(char *file);
/* functions */
#define compile(var, re) \
var=pcre_compile(re, 0, (const char **)&e, &i, NULL); \
if(var==NULL) die("init_warnings PCRE error: %s at %i", e, i); \
pcre_fullinfo(var, NULL, PCRE_INFO_CAPTURECOUNT, &i); \
if(i>ovecsize) ovecsize=i;
void init_warnings(void){
int i, j, z=0;
char *e;
struct subst_val subs[]={
{ 'z', STRING, NULL },
{ 'f', STRING, &bigbuf },
{ 0, 0, 0 }
};
/* Count zones, and find length of longest */
for(i=0; warning_zones[i]!=NULL; i++){
j=strlen(warning_zones[i]);
if(j>z) z=j;
}
/* Allocate char ptrs for each filename for each zone */
for(j=0; filenames[j]!=NULL; j++){
reqs[j][0]=malloc(sizeof(char *)*i);
reqs[j][1]=malloc(sizeof(char *)*i);
if(reqs[j][0]==NULL || reqs[j][1]==NULL) die("init_warnings malloc");
}
zone_current_warnings=calloc(i, sizeof(*zone_current_warnings));
if(zone_current_warnings==NULL) die("init_warnings malloc");
/* Allocate filename base */
e=get_pid_filename("");
i=strlen(e);
warning_filename1=malloc(i+z+32);
if(warning_filename1==NULL)
die("init_warnings malloc");
strcpy(warning_filename1, e);
free(e);
warning_endptr1=warning_filename1+i;
/* Setup misc vars */
current_warnings=0;
ovecsize=0;
compile(expires, "Expires:(\\d+)(\\d\\d)(\\d\\d)(\\d\\d)(\\d\\d);");
ovecsize=(ovecsize+1)*3;
/* Remove stale files, and allocate URIs */
for(z=0; warning_zones[z]!=NULL; z++){
subs[0].val=warning_zones+z;
for(i=0; filenames[i]!=NULL; i++){
sprintf(warning_endptr1, "%s.%s.txt", warning_zones[z], filenames[i]);
unlink(warning_filename1);
sprintf(warning_endptr1, "%s.new-%s.txt", warning_zones[z], filenames[i]);
unlink(warning_filename1);
strncpy(bigbuf, filenames[i], BIGBUF_LEN);
bigbuf[BIGBUF_LEN-1]='\0';
for(j=0; bigbuf[j]; j++){
if(bigbuf[j]=='>') bigbuf[j]='/';
}
if((reqs[i][0][z]=subst(warning_uri, subs))==NULL) die("init_warning");
reqs[i][1][z]=NULL;
if(warning_post!=NULL && (reqs[i][1][z]=subst(warning_post, subs))==NULL) die("init_warning");
}
}
}
#undef compile
struct callback_data {
int zone;
int warning;
};
static void warning_callback(char *filename, void *v){
struct stat statbuf;
struct callback_data *d=(struct callback_data *)v;
sprintf(warning_endptr1, "%s.%s.txt", warning_zones[d->zone], filenames[d->warning]);
if(stat(filename, &statbuf)>=0){
if(S_ISREG(statbuf.st_mode) && statbuf.st_size!=0
&& check_warning(filename)
&& diff(filename, warning_filename1)){
current_warnings|=1<<d->warning;
zone_current_warnings[d->zone]|=1<<d->warning;
rename(filename, warning_filename1);
} else {
unlink(filename);
}
}
}
void warnings_cleanup(void){
int i, z;
if(warning_filename1==NULL) return;
for(z=0; warning_zones[z]!=NULL; z++){
for(i=0; filenames[i]!=NULL; i++){
sprintf(warning_endptr1, "%s.%s.txt", warning_zones[z], filenames[i]);
unlink(warning_filename1);
sprintf(warning_endptr1, "%s.new-%s.txt", warning_zones[z], filenames[i]);
unlink(warning_filename1);
}
}
}
void update_warnings(int force){
// time_t t;
struct stat statbuf;
int i, z;
struct callback_data *d;
if(warning_filename1==NULL) return;
// t=time(NULL)/60;
// if(!force && warning_time>t) return;
// warning_time=t+15;
for(z=0; warning_zones[z]!=NULL; z++){
for(i=0; filenames[i]!=NULL; i++){
/* expire old wanrings */
sprintf(warning_endptr1, "%s.%s.txt", warning_zones[z], filenames[i]);
if(stat(warning_filename1, &statbuf)>=0){
if(!S_ISREG(statbuf.st_mode) || statbuf.st_size==0
|| !check_warning(warning_filename1)){
unlink(warning_filename1);
current_warnings&=~(1<<i);
zone_current_warnings[z]&=~(1<<i);
}
} else {
current_warnings&=~(1<<i);
zone_current_warnings[z]&=~(1<<i);
}
if((d=malloc(sizeof(*d)))==NULL) continue;
sprintf(warning_endptr1, "%s.new-%s.txt", warning_zones[z], filenames[i]);
d->zone=z;
d->warning=i;
download_file(warning_filename1, reqs[i][0][z], reqs[i][1][z], DOWNLOAD_NO_404, warning_callback, d);
}
}
}
#define get_substr(n, c) \
if(pcre_get_substring(s, ovector, ovalue, n, (const char **)&c)<0){ free(s); return 0; }
static int check_warning(char *file){
FILE *fp;
char *s, *c;
int len;
int i;
time_t t;
struct tm *tm;
int ovector[ovecsize];
int ovalue;
if((fp=fopen(file, "r"))==NULL) return 0;
ovalue=-1;
while((len=getLine(&s, fp))>0){
ovalue=pcre_exec(expires, NULL, s, len, 0, 0, ovector, ovecsize);
if(ovalue>0) break;
free(s);
}
fclose(fp);
if(ovalue<=0) return 0;
t=time(NULL);
tm=gmtime(&t);
get_substr(1, c); i=atoi(c)-1900; pcre_free_substring(c);
if(tm->tm_year<i){ free(s); return 1; }
if(tm->tm_year>i){ free(s); return 0; }
get_substr(2, c); i=atoi(c)-1; pcre_free_substring(c);
if(tm->tm_mon<i){ free(s); return 1; }
if(tm->tm_mon>i){ free(s); return 0; }
get_substr(3, c); i=atoi(c); pcre_free_substring(c);
if(tm->tm_mday<i){ free(s); return 1; }
if(tm->tm_mday>i){ free(s); return 0; }
get_substr(4, c); i=atoi(c); pcre_free_substring(c);
if(tm->tm_hour<i){ free(s); return 1; }
if(tm->tm_hour>i){ free(s); return 0; }
get_substr(5, c); i=atoi(c); pcre_free_substring(c);
if(tm->tm_min<=i){ free(s); return 1; }
free(s); return 0;
}
void output_warnings(int all){
FILE *fp;
int i, z, len;
pid_t pid;
int pipefd[2];
if(!all && current_warnings==0) return;
if(pipe(pipefd)) die("output_warnings pipe creation");
/* Fork to display the file */
pid=fork();
if(pid==-1){
warn("output_warnings fork");
return;
}
/* CHILD: Redirects stdin/stderr/stdout and execs the viewer */
if(pid==0){
close(pipefd[1]);
dup2(pipefd[0], STDIN_FILENO);
dup2(devnull, STDOUT_FILENO);
execl("/bin/sh", "/bin/sh", "-c", viewer, NULL);
die("output_warnings exec");
}
/* PARENT writes warnings to the pipe and returns */
close(pipefd[0]);
for(z=0; warning_zones[z]!=NULL; z++){
if(!zone_current_warnings[z]) continue;
for(i=0; filenames[i]!=NULL; i++){
if(!all && !(zone_current_warnings[z]&(1<<i))) continue;
sprintf(warning_endptr1, "%s.%s.txt", warning_zones[z], filenames[i]);
if((fp=fopen(warning_filename1, "r"))==NULL) continue;
snprintf(bigbuf, BIGBUF_LEN, "======== BEGIN %s %s ========\n", warning_zones[z], filenames[i]);
write(pipefd[1], bigbuf, strlen(bigbuf));
while(!feof(fp)){
len=fread(bigbuf, sizeof(char), BIGBUF_LEN, fp);
write(pipefd[1], bigbuf, len);
}
fclose(fp);
}
if(!all) zone_current_warnings[z]=0;
}
close(pipefd[1]);
if(!all) current_warnings=0;
return;
}
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