repo: shell-daemons
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path_from: query_param.c
revision_from: refs/heads/master:
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/ query_param.c

refs/heads/master:/query_param.c

 #include 
 #include  //strchr

 //this is to replace all of the:
 //   printf "%s\n" "$QUERY_STRING" | tr '&' '\n' | grep "^$1=" | cut -d= -f2-
 //that I do a lot.

 #include  //getenv

 int main(int argc,char *argv[]) {
   char *p;
   if(argc != 2) return fprintf(stderr,"usage: query_param param_name\n"),1;
   for(p=getenv("QUERY_STRING");p;p=strchr(p,'&')) {
     p++;
     if(!strncmp(p,argv[1],strlen(argv[1]))) {
       if(strchr(p,'=')-p == strlen(argv[1])) {
         if(strchr(p,'&')) *strchr(p,'&')=0;
         printf("%s\n",p+strlen(argv[1])+1);
         return 0;
       }
     }
   }
   return 1;
 }