lib/proc.c

   1 /* Tolerant /proc file parser. Copyright 1998 Andi Kleen */
   2 /* $Id: proc.c,v 1.4 1999/01/05 20:54:00 philip Exp $ */
   3 /* Fixme: cannot currently cope with removed fields */
   4
   5 #include <string.h>
   6 #include <stdarg.h>
   7 #include <stdio.h>
   8 #include <ctype.h>
   9
  10 /* Caller must free return string. */
  11
  12 char *proc_gen_fmt(char *name, int more, FILE * fh,...)
  13 {
  14     char buf[512], format[512] = "";
  15     char *title, *head, *hdr;
  16     va_list ap;
  17
  18     if (!fgets(buf, (sizeof buf) - 1, fh))
  19         return NULL;
  20     strcat(buf, " ");
  21
  22     va_start(ap, fh);
  23     title = va_arg(ap, char *);
  24     for (hdr = buf; hdr;) {
  25         while (isspace(*hdr) || *hdr == '|')
  26             hdr++;
  27         head = hdr;
  28         hdr = strpbrk(hdr, "| \t\n");
  29         if (hdr)
  30             *hdr++ = 0;
  31
  32         if (!strcmp(title, head)) {
  33             strcat(format, va_arg(ap, char *));
  34             title = va_arg(ap, char *);
  35             if (!title || !head)
  36                 break;
  37         } else {
  38             strcat(format, "%*s");      /* XXX */
  39         }
  40         strcat(format, " ");
  41     }
  42     va_end(ap);
  43
  44     if (!more && title) {
  45         fprintf(stderr, "warning: %s does not contain required field %s\n",
  46                 name, title);
  47         return NULL;
  48     }
  49     return strdup(format);
  50 }
  51
  52 /*
  53  * this will generate a bitmask of present/missing fields in the header of
  54  * a /proc file.
  55  */
  56 int proc_guess_fmt(char *name, FILE *fh, ...)
  57 {
  58     char buf[512];
  59     char *tmp;
  60     int flag = 0;
  61     va_list ap;
  62
  63     if (!fgets(buf, (sizeof buf) - 1, fh))
  64         return -1;
  65     strcat(buf, "\0");
  66     va_start(ap, fh);
  67     while((tmp = va_arg(ap, char *))) {
  68       int f = va_arg(ap, int);
  69       if (strstr(buf,tmp) != 0)
  70         flag |= f;
  71     }
  72     va_end(ap);
  73     return flag;
  74 }