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
  27 void print_pkg_status(pkg_t * pkg, FILE * file);
  28
  29 long unsigned int get_available_blocks(char * filesystem)
  30 {
  31     struct statfs sfs;
  32
  33     if(statfs(filesystem, &sfs)){
  34         fprintf(stderr, "bad statfs\n");
  35         return 0;
  36     }
  37     /*    fprintf(stderr, "reported fs type %x\n", sfs.f_type); */
  38
  39     // Actually ((sfs.f_bavail * sfs.f_bsize) / 1024)
  40     // and here we try to avoid overflow.
  41     if (sfs.f_bsize >= 1024)
  42         return (sfs.f_bavail * (sfs.f_bsize / 1024));
  43     else if (sfs.f_bsize > 0)
  44         return sfs.f_bavail / (1024 / sfs.f_bsize);
  45     fprintf(stderr, "bad statfs f_bsize == 0\n");
  46     return 0;
  47 }
  48
  49 char **read_raw_pkgs_from_file(const char *file_name)
  50 {
  51      FILE *fp;
  52      char **ret;
  53
  54      if(!(fp = fopen(file_name, "r"))){
  55           fprintf(stderr, "can't get %s open for read\n", file_name);
  56           return NULL;
  57      }
  58
  59      ret = read_raw_pkgs_from_stream(fp);
  60
  61      fclose(fp);
  62
  63      return ret;
  64 }
  65
  66 char **read_raw_pkgs_from_stream(FILE *fp)
  67 {
  68      char **raw = NULL, *buf, *scout;
  69      int count = 0;
  70      size_t size = 512;
  71
  72      buf = calloc (1, size);
  73
  74      while (fgets(buf, size, fp)) {
  75           while (strlen (buf) == (size - 1)
  76                  && buf[size-2] != '\n') {
  77                size_t o = size - 1;
  78                size *= 2;
  79                buf = realloc (buf, size);
  80                if (fgets (buf + o, size - o, fp) == NULL)
  81                     break;
  82           }
  83
  84           if(!(count % 50))
  85                raw = realloc(raw, (count + 50) * sizeof(char *));
  86
  87           if((scout = strchr(buf, '\n')))
  88                *scout = '\0';
  89
  90           raw[count++] = strdup(buf);
  91      }
  92
  93      raw = realloc(raw, (count + 1) * sizeof(char *));
  94      raw[count] = NULL;
  95
  96      free (buf);
  97
  98      return raw;
  99 }
 100
 101 /* something to remove whitespace, a hash pooper */
 102 char *trim_alloc(char *line)
 103 {
 104      char *new;
 105      char *dest, *src, *end;
 106
 107      new = calloc(1, strlen(line) + 1);
 108      if ( new == NULL ){
 109         fprintf(stderr,"%s: Unable to allocate memory\n",__FUNCTION__);
 110         return NULL;
 111      }
 112      dest = new, src = line, end = line + (strlen(line) - 1);
 113
 114      /* remove it from the front */
 115      while(src &&
 116            isspace(*src) &&
 117            *src)
 118           src++;
 119      /* and now from the back */
 120      while((end > src) &&
 121            isspace(*end))
 122           end--;
 123      end++;
 124      *end = '\0';
 125      strcpy(new, src);
 126      /* this does from the first space
 127       *  blasting away any versions stuff in depends
 128       while(src &&
 129       !isspace(*src) &&
 130       *src)
 131       *dest++ = *src++;
 132       *dest = '\0';
 133       */
 134
 135      return new;
 136 }
 137
 138 int line_is_blank(const char *line)
 139 {
 140      const char *s;
 141
 142      for (s = line; *s; s++) {
 143           if (!isspace(*s))
 144                return 0;
 145      }
 146      return 1;
 147 }
 148
 149 static struct errlist *error_list_head, *error_list_tail;
 150
 151 /*
 152  * XXX: this function should not allocate memory as it may be called to
 153  *      print an error because we are out of memory.
 154  */
 155 void push_error_list(char * msg)
 156 {
 157         struct errlist *e;
 158
 159         e = calloc(1,  sizeof(struct errlist));
 160         if (e == NULL) {
 161                 fprintf(stderr, "%s: calloc: %s\n",
 162                                 __FUNCTION__, strerror(errno));
 163                 return;
 164         }
 165
 166         e->errmsg = strdup(msg);
 167         if (e->errmsg == NULL) {
 168                 fprintf(stderr, "%s: strdup: %s\n",
 169                                 __FUNCTION__, strerror(errno));
 170                 free(e);
 171                 return;
 172         }
 173
 174         e->next = NULL;
 175
 176         if (error_list_head) {
 177                 error_list_tail->next = e;
 178                 error_list_tail = e;
 179         } else {
 180                 error_list_head = error_list_tail = e;
 181         }
 182 }
 183
 184 void free_error_list(void)
 185 {
 186         struct errlist *err, *err_tmp;
 187
 188         err = error_list_head;
 189         while (err != NULL) {
 190                 free(err->errmsg);
 191                 err_tmp = err;
 192                 err = err->next;
 193                 free(err_tmp);
 194         }
 195 }
 196
 197 void print_error_list (void)
 198 {
 199         struct errlist *err = error_list_head;
 200
 201         if (err) {
 202                 printf ("Collected errors:\n");
 203                 /* Here we print the errors collected and free the list */
 204                 while (err != NULL) {
 205                         printf (" * %s", err->errmsg);
 206                         err = err->next;
 207                 }
 208         }
 209 }