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 char **read_raw_pkgs_from_file(const char *file_name)
  51 {
  52      FILE *fp;
  53      char **ret;
  54
  55      if(!(fp = fopen(file_name, "r"))){
  56           fprintf(stderr, "can't get %s open for read\n", file_name);
  57           return NULL;
  58      }
  59
  60      ret = read_raw_pkgs_from_stream(fp);
  61
  62      fclose(fp);
  63
  64      return ret;
  65 }
  66
  67 char **read_raw_pkgs_from_stream(FILE *fp)
  68 {
  69      char **raw = NULL, *buf, *scout;
  70      int count = 0;
  71      size_t size = 512;
  72
  73      buf = xcalloc(1, size);
  74
  75      while (fgets(buf, size, fp)) {
  76           while (strlen (buf) == (size - 1)
  77                  && buf[size-2] != '\n') {
  78                size_t o = size - 1;
  79                size *= 2;
  80                buf = xrealloc (buf, size);
  81                if (fgets (buf + o, size - o, fp) == NULL)
  82                     break;
  83           }
  84
  85           if(!(count % 50))
  86                raw = xrealloc(raw, (count + 50) * sizeof(char *));
  87
  88           if((scout = strchr(buf, '\n')))
  89                *scout = '\0';
  90
  91           raw[count++] = xstrdup(buf);
  92      }
  93
  94      raw = xrealloc(raw, (count + 1) * sizeof(char *));
  95      raw[count] = NULL;
  96
  97      free (buf);
  98
  99      return raw;
 100 }
 101
 102 /* something to remove whitespace, a hash pooper */
 103 char *trim_alloc(char *line)
 104 {
 105      char *new;
 106      char *dest, *src, *end;
 107
 108      new = xcalloc(1, strlen(line) + 1);
 109      dest = new, src = line, end = line + (strlen(line) - 1);
 110
 111      /* remove it from the front */
 112      while(src &&
 113            isspace(*src) &&
 114            *src)
 115           src++;
 116      /* and now from the back */
 117      while((end > src) &&
 118            isspace(*end))
 119           end--;
 120      end++;
 121      *end = '\0';
 122      strcpy(new, src);
 123      /* this does from the first space
 124       *  blasting away any versions stuff in depends
 125       while(src &&
 126       !isspace(*src) &&
 127       *src)
 128       *dest++ = *src++;
 129       *dest = '\0';
 130       */
 131
 132      return new;
 133 }
 134
 135 int line_is_blank(const char *line)
 136 {
 137      const char *s;
 138
 139      for (s = line; *s; s++) {
 140           if (!isspace(*s))
 141                return 0;
 142      }
 143      return 1;
 144 }
 145
 146 static struct errlist *error_list_head, *error_list_tail;
 147
 148 /*
 149  * XXX: this function should not allocate memory as it may be called to
 150  *      print an error because we are out of memory.
 151  */
 152 void push_error_list(char * msg)
 153 {
 154         struct errlist *e;
 155
 156         e = xcalloc(1,  sizeof(struct errlist));
 157         e->errmsg = xstrdup(msg);
 158         e->next = NULL;
 159
 160         if (error_list_head) {
 161                 error_list_tail->next = e;
 162                 error_list_tail = e;
 163         } else {
 164                 error_list_head = error_list_tail = e;
 165         }
 166 }
 167
 168 void free_error_list(void)
 169 {
 170         struct errlist *err, *err_tmp;
 171
 172         err = error_list_head;
 173         while (err != NULL) {
 174                 free(err->errmsg);
 175                 err_tmp = err;
 176                 err = err->next;
 177                 free(err_tmp);
 178         }
 179 }
 180
 181 void print_error_list (void)
 182 {
 183         struct errlist *err = error_list_head;
 184
 185         if (err) {
 186                 printf ("Collected errors:\n");
 187                 /* Here we print the errors collected and free the list */
 188                 while (err != NULL) {
 189                         printf (" * %s", err->errmsg);
 190                         err = err->next;
 191                 }
 192         }
 193 }