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/* Tolerant /proc file parser. Copyright 1998 Andi Kleen */

/* $Id: proc.c,v 1.1 2002-03-17 19:58:53 simons Exp $ */

/* Fixme: cannot currently cope with removed fields */

#include <string.h>

#include <stdarg.h>

#include <stdio.h>

#include <ctype.h>

/* Caller must free return string. */

char *proc_gen_fmt(char *name, int more, FILE * fh,...)

{

    char buf[512], format[512] = "";

    char *title, *head, *hdr;

    va_list ap;

    if (!fgets(buf, (sizeof buf) - 1, fh))

        return NULL;

    strcat(buf, " ");

    va_start(ap, fh);

    title = va_arg(ap, char *);

    for (hdr = buf; hdr;) {

        while (isspace(*hdr) || *hdr == '|')

            hdr++;

        head = hdr;

        hdr = strpbrk(hdr, "| \t\n");

        if (hdr)

            *hdr++ = 0;

        if (!strcmp(title, head)) {

            strcat(format, va_arg(ap, char *));

            title = va_arg(ap, char *);

            if (!title || !head)

                break;

        } else {

            strcat(format, "%*s");      /* XXX */

        }

        strcat(format, " ");

    }

    va_end(ap);

    if (!more && title) {

        fprintf(stderr, "warning: %s does not contain required field %s\n",

                name, title);

        return NULL;

    }

    return strdup(format);

}

/*

 * this will generate a bitmask of present/missing fields in the header of

 * a /proc file.

 */

int proc_guess_fmt(char *name, FILE *fh, ...)

{

    char buf[512];

    char *tmp;

    int flag = 0;

    va_list ap;

    if (!fgets(buf, (sizeof buf) - 1, fh))

        return -1;

    strcat(buf, "\0");

    va_start(ap, fh);

    while((tmp = va_arg(ap, char *))) {

      int f = va_arg(ap, int);

      if (strstr(buf,tmp) != 0)

        flag |= f;

    }

    va_end(ap);

    return flag;

}