libopkg/opkg_utils.c

   1 /* opkg_utils.c - the opkg package management system
   2
   3    Steven M. Ayer
   4
   5    Copyright (C) 2002 Compaq Computer Corporation
   6
   7    This program is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU General Public License as
   9    published by the Free Software Foundation; either version 2, or (at
  10    your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful, but
  13    WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    General Public License for more details.
  16 */
  17
  18 #include "includes.h"
  19 #include <errno.h>
  20 #include <ctype.h>
  21 #include <sys/statvfs.h>
  22
  23 #include "opkg_utils.h"
  24 #include "pkg.h"
  25 #include "pkg_hash.h"
  26 #include "libbb/libbb.h"
  27
  28 void print_pkg_status(pkg_t * pkg, FILE * file);
  29
  30 unsigned long
  31 get_available_kbytes(char * filesystem)
  32 {
  33     struct statvfs f;
  34
  35     if (statvfs(filesystem, &f) == -1) {
  36         opkg_perror(ERROR, "Failed to statvfs for %s", filesystem);
  37         return 0;
  38     }
  39
  40     // Actually ((sfs.f_bavail * sfs.f_frsize) / 1024)
  41     // and here we try to avoid overflow.
  42     if (f.f_frsize >= 1024)
  43         return (f.f_bavail * (f.f_frsize / 1024));
  44     else if (f.f_frsize > 0)
  45         return f.f_bavail / (1024 / f.f_frsize);
  46
  47     opkg_msg(ERROR, "Unknown block size for target filesystem.\n");
  48
  49     return 0;
  50 }
  51
  52 /* something to remove whitespace, a hash pooper */
  53 char *trim_xstrdup(const char *src)
  54 {
  55      const char *end;
  56
  57      /* remove it from the front */
  58      while(src &&
  59            isspace(*src) &&
  60            *src)
  61           src++;
  62
  63      end = src + (strlen(src) - 1);
  64
  65      /* and now from the back */
  66      while((end > src) &&
  67            isspace(*end))
  68           end--;
  69
  70      end++;
  71
  72      /* xstrndup will NULL terminate for us */
  73      return xstrndup(src, end-src);
  74 }
  75
  76 int line_is_blank(const char *line)
  77 {
  78      const char *s;
  79
  80      for (s = line; *s; s++) {
  81           if (!isspace(*s))
  82                return 0;
  83      }
  84      return 1;
  85 }