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         int ret=0;
  22         pid_t pid;
  23
  24
  25         if(chdir(getenv("TOPDIR")))
  26         {
  27                 perror("chdir");
  28                 exit(1);
  29         }
  30
  31         /*
  32          *      Build the exec array ahead of time.
  33          */
  34         vec[0]="kernel-doc";
  35         vec[1]="-docbook";
  36         for(i=1;vp<8189;i++)
  37         {
  38                 if(argv[i]==NULL)
  39                         break;
  40                 vec[vp++]=type;
  41                 vec[vp++]=argv[i];
  42         }
  43         vec[vp++]=buf+2;
  44         vec[vp++]=NULL;
  45
  46         /*
  47          *      Now process the template
  48          */
  49
  50         while(fgets(buf, 1024, stdin))
  51         {
  52                 if(*buf!='!') {
  53                         printf("%s", buf);
  54                         continue;
  55                 }
  56
  57                 fflush(stdout);
  58                 svec = vec;
  59                 if(buf[1]=='E')
  60                         strcpy(type, "-function");
  61                 else if(buf[1]=='I')
  62                         strcpy(type, "-nofunction");
  63                 else if(buf[1]=='F') {
  64                         int snarf = 0;
  65                         fvec[0] = "kernel-doc";
  66                         fvec[1] = "-docbook";
  67                         strcpy (type, "-function");
  68                         vp = 2;
  69                         for (i = 2; buf[i]; i++) {
  70                                 if (buf[i] == ' ' || buf[i] == '\n') {
  71                                         buf[i] = '\0';
  72                                         snarf = 1;
  73                                         continue;
  74                                 }
  75
  76                                 if (snarf) {
  77                                         snarf = 0;
  78                                         fvec[vp++] = type;
  79                                         fvec[vp++] = &buf[i];
  80                                 }
  81                         }
  82                         fvec[vp++] = &buf[2];
  83                         fvec[vp] = NULL;
  84                         svec = fvec;
  85                 } else
  86                 {
  87                         fprintf(stderr, "Unknown ! escape.\n");
  88                         exit(1);
  89                 }
  90                 switch(pid=fork())
  91                 {
  92                 case -1:
  93                         perror("fork");
  94                         exit(1);
  95                 case  0:
  96                         execvp("scripts/kernel-doc", svec);
  97                         perror("exec scripts/kernel-doc");
  98                         exit(1);
  99                 default:
 100                         waitpid(pid, &ret ,0);
 101                 }
 102         }
 103         exit(ret);
 104 }