scripts/docproc.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <unistd.h>
   5 #include <sys/types.h>
   6 #include <sys/wait.h>
   7
   8 /*
   9  *      A simple filter for the templates
  10  */
  11
  12 int main(int argc, char *argv[])
  13 {
  14         char buf[1024];
  15         char *vec[8192];
  16         char *fvec[200];
  17         char **svec;
  18         char type[64];
  19         int i;
  20         int vp=2;
  21         pid_t pid;
  22
  23
  24         if(chdir(getenv("TOPDIR")))
  25         {
  26                 perror("chdir");
  27                 exit(1);
  28         }
  29
  30         /*
  31          *      Build the exec array ahead of time.
  32          */
  33         vec[0]="kernel-doc";
  34         vec[1]="-docbook";
  35         for(i=1;vp<8189;i++)
  36         {
  37                 if(argv[i]==NULL)
  38                         break;
  39                 vec[vp++]=type;
  40                 vec[vp++]=argv[i];
  41         }
  42         vec[vp++]=buf+2;
  43         vec[vp++]=NULL;
  44
  45         /*
  46          *      Now process the template
  47          */
  48
  49         while(fgets(buf, 1024, stdin))
  50         {
  51                 if(*buf!='!') {
  52                         printf("%s", buf);
  53                         continue;
  54                 }
  55
  56                 fflush(stdout);
  57                 svec = vec;
  58                 if(buf[1]=='E')
  59                         strcpy(type, "-function");
  60                 else if(buf[1]=='I')
  61                         strcpy(type, "-nofunction");
  62                 else if(buf[1]=='F') {
  63                         int snarf = 0;
  64                         fvec[0] = "kernel-doc";
  65                         fvec[1] = "-docbook";
  66                         strcpy (type, "-function");
  67                         vp = 2;
  68                         for (i = 2; buf[i]; i++) {
  69                                 if (buf[i] == ' ' || buf[i] == '\n') {
  70                                         buf[i] = '\0';
  71                                         snarf = 1;
  72                                         continue;
  73                                 }
  74
  75                                 if (snarf) {
  76                                         snarf = 0;
  77                                         fvec[vp++] = type;
  78                                         fvec[vp++] = &buf[i];
  79                                 }
  80                         }
  81                         fvec[vp++] = &buf[2];
  82                         fvec[vp] = NULL;
  83                         svec = fvec;
  84                 } else
  85                 {
  86                         fprintf(stderr, "Unknown ! escape.\n");
  87                         exit(1);
  88                 }
  89                 switch(pid=fork())
  90                 {
  91                 case -1:
  92                         perror("fork");
  93                         exit(1);
  94                 case  0:
  95                         execvp("scripts/kernel-doc", svec);
  96                         perror("exec scripts/kernel-doc");
  97                         exit(1);
  98                 default:
  99                         waitpid(pid, NULL,0);
 100                 }
 101         }
 102         exit(0);
 103 }