sergiotarxz/nuttx-apps
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

apps/nshlib: truncate command will now use ftruncate (vs. truncate) if it had to create the file with creat().

Browse Source
This commit is contained in:
Gregory Nutt 2018-01-10 07:24:24 -06:00
parent 8ecf618a4d
commit 99512b90db
1 changed files with 29 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
nshlib/nsh_fscmds.c
View File

@ -1834,35 +1834,53 @@ int cmd_truncate(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
{
nsh_output(vtbl, g_fmtcmdfailed, argv[0], "stat", NSH_ERRNO);
ret = ERROR;
goto errout_with_fullpath;
}
else
{
/* We successfully performed the create and now have a zero-
* length file. Perform the truncation to extend the allocation
* (unless we really wanted a zero-length file).
*/
close(fd);
ret = OK;
if (length > 0)
{
/* Extend the file to length */
ret = ftruncate(fd, length);
if (ret < 0)
{
nsh_output(vtbl, g_fmtcmdfailed, argv[0], "ftruncate",
NSH_ERRNO);
}
}
close(fd);
}
}
else
{
nsh_output(vtbl, g_fmtcmdfailed, argv[0], "stat",
NSH_ERRNO_OF(errval));
ret = ERROR;
goto errout_with_fullpath;
}
}
else if (!S_ISREG(buf.st_mode))
{
nsh_output(vtbl, g_fmtarginvalid, argv[0]);
ret = ERROR;
goto errout_with_fullpath;
}
/* Everything looks good... perform the truncation */
ret = truncate(fullpath, length);
if (ret < 0)
else
{
nsh_output(vtbl, g_fmtcmdfailed, argv[0], "truncate", NSH_ERRNO);
/* Everything looks good... perform the truncation */
ret = truncate(fullpath, length);
if (ret < 0)
{
nsh_output(vtbl, g_fmtcmdfailed, argv[0], "truncate", NSH_ERRNO);
}
}
errout_with_fullpath:
nsh_freefullpath(fullpath);
return ret;
}