examples/libsmbclient/testtruncate.c

   1 #include <stdio.h>
   2 #include <unistd.h>
   3 #include <string.h>
   4 #include <time.h>
   5 #include <errno.h>
   6 #include <libsmbclient.h>
   7 #include "get_auth_data_fn.h"
   8
   9
  10 int main(int argc, char * argv[])
  11 {
  12     int             fd;
  13     int             ret;
  14     int             debug = 0;
  15     int             savedErrno;
  16     char            buffer[128];
  17     char *          pSmbPath = NULL;
  18     char *          pLocalPath = NULL;
  19     struct stat     st;
  20
  21     if (argc != 2)
  22     {
  23         printf("usage: "
  24                "%s smb://path/to/file\n",
  25                argv[0]);
  26         return 1;
  27     }
  28
  29     smbc_init(get_auth_data_fn, debug);
  30
  31     if ((fd = smbc_open(argv[1], O_WRONLY | O_CREAT | O_TRUNC, 0)) < 0)
  32     {
  33         perror("smbc_open");
  34         return 1;
  35     }
  36
  37     strcpy(buffer, "Hello world.\nThis is a test.\n");
  38
  39     ret = smbc_write(fd, buffer, strlen(buffer));
  40     savedErrno = errno;
  41     smbc_close(fd);
  42
  43     if (ret < 0)
  44     {
  45         errno = savedErrno;
  46         perror("write");
  47     }
  48
  49     if (smbc_stat(argv[1], &st) < 0)
  50     {
  51         perror("smbc_stat");
  52         return 1;
  53     }
  54
  55     printf("Original size: %lu\n", (unsigned long) st.st_size);
  56
  57     if ((fd = smbc_open(argv[1], O_WRONLY, 0)) < 0)
  58     {
  59         perror("smbc_open");
  60         return 1;
  61     }
  62
  63     ret = smbc_ftruncate(fd, 13);
  64     savedErrno = errno;
  65     smbc_close(fd);
  66     if (ret < 0)
  67     {
  68         errno = savedErrno;
  69         perror("smbc_ftruncate");
  70         return 1;
  71     }
  72
  73     if (smbc_stat(argv[1], &st) < 0)
  74     {
  75         perror("smbc_stat");
  76         return 1;
  77     }
  78
  79     printf("New size: %lu\n", (unsigned long) st.st_size);
  80
  81     return 0;
  82 }