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/vfs.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 long unsigned int get_available_blocks(char * filesystem)
  31 {
  32     struct statfs sfs;
  33
  34     if(statfs(filesystem, &sfs)){
  35         fprintf(stderr, "bad statfs\n");
  36         return 0;
  37     }
  38     /*    fprintf(stderr, "reported fs type %x\n", sfs.f_type); */
  39
  40     // Actually ((sfs.f_bavail * sfs.f_bsize) / 1024)
  41     // and here we try to avoid overflow.
  42     if (sfs.f_bsize >= 1024)
  43         return (sfs.f_bavail * (sfs.f_bsize / 1024));
  44     else if (sfs.f_bsize > 0)
  45         return sfs.f_bavail / (1024 / sfs.f_bsize);
  46     fprintf(stderr, "bad statfs f_bsize == 0\n");
  47     return 0;
  48 }
  49
  50 /* something to remove whitespace, a hash pooper */
  51 char *trim_xstrdup(const char *src)
  52 {
  53      const char *end;
  54
  55      /* remove it from the front */
  56      while(src &&
  57            isspace(*src) &&
  58            *src)
  59           src++;
  60
  61      end = src + (strlen(src) - 1);
  62
  63      /* and now from the back */
  64      while((end > src) &&
  65            isspace(*end))
  66           end--;
  67
  68      end++;
  69
  70      /* xstrndup will NULL terminate for us */
  71      return xstrndup(src, end-src);
  72 }
  73
  74 int line_is_blank(const char *line)
  75 {
  76      const char *s;
  77
  78      for (s = line; *s; s++) {
  79           if (!isspace(*s))
  80                return 0;
  81      }
  82      return 1;
  83 }
  84
  85 static struct errlist *error_list_head, *error_list_tail;
  86
  87 /*
  88  * XXX: this function should not allocate memory as it may be called to
  89  *      print an error because we are out of memory.
  90  */
  91 void push_error_list(char * msg)
  92 {
  93         struct errlist *e;
  94
  95         e = xcalloc(1,  sizeof(struct errlist));
  96         e->errmsg = xstrdup(msg);
  97         e->next = NULL;
  98
  99         if (error_list_head) {
 100                 error_list_tail->next = e;
 101                 error_list_tail = e;
 102         } else {
 103                 error_list_head = error_list_tail = e;
 104         }
 105 }
 106
 107 void free_error_list(void)
 108 {
 109         struct errlist *err, *err_tmp;
 110
 111         err = error_list_head;
 112         while (err != NULL) {
 113                 free(err->errmsg);
 114                 err_tmp = err;
 115                 err = err->next;
 116                 free(err_tmp);
 117         }
 118 }
 119
 120 void print_error_list (void)
 121 {
 122         struct errlist *err = error_list_head;
 123
 124         if (err) {
 125                 printf ("Collected errors:\n");
 126                 /* Here we print the errors collected and free the list */
 127                 while (err != NULL) {
 128                         printf (" * %s", err->errmsg);
 129                         err = err->next;
 130                 }
 131         }
 132 }