release/src/router/vsftpd/filestr.c

   1 /*
   2  * Part of Very Secure FTPd
   3  * Licence: GPL v2
   4  * Author: Chris Evans
   5  * filestr.c
   6  *
   7  * This file contains extensions to the string/buffer API, to load a file
   8  * into a buffer.
   9  */
  10
  11 #include "filestr.h"
  12 /* Get access to "private" functions */
  13 #define VSFTP_STRING_HELPER
  14 #include "str.h"
  15 #include "sysutil.h"
  16 #include "secbuf.h"
  17 #include "utility.h"
  18
  19 int
  20 str_fileread(struct mystr* p_str, const char* p_filename, unsigned int maxsize)
  21 {
  22   int fd;
  23   int retval = 0;
  24   filesize_t size;
  25   char* p_sec_buf = 0;
  26   struct vsf_sysutil_statbuf* p_stat = 0;
  27   /* In case we fail, make sure we return an empty string */
  28   str_empty(p_str);
  29   fd = vsf_sysutil_open_file(p_filename, kVSFSysUtilOpenReadOnly);
  30   if (vsf_sysutil_retval_is_error(fd))
  31   {
  32     return fd;
  33   }
  34   vsf_sysutil_fstat(fd, &p_stat);
  35   if (vsf_sysutil_statbuf_is_regfile(p_stat))
  36   {
  37     size = vsf_sysutil_statbuf_get_size(p_stat);
  38     if (size > maxsize)
  39     {
  40       size = maxsize;
  41     }
  42     vsf_secbuf_alloc(&p_sec_buf, (unsigned int) size);
  43
  44     retval = vsf_sysutil_read_loop(fd, p_sec_buf, (unsigned int) size);
  45     if (vsf_sysutil_retval_is_error(retval))
  46     {
  47       goto free_out;
  48     }
  49     else if ((unsigned int) retval != size)
  50     {
  51       die("read size mismatch");
  52     }
  53     str_alloc_memchunk(p_str, p_sec_buf, size);
  54   }
  55 free_out:
  56   vsf_sysutil_free(p_stat);
  57   vsf_secbuf_free(&p_sec_buf);
  58   vsf_sysutil_close(fd);
  59   return retval;
  60 }
  61