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tools/gpgtar: Improve error handling.

Browse source 
* tools/gpgtar-create.c (gpgtar_create): Return an error code, fix
error handling.
* tools/gpgtar-extract.c (gpgtar_extract): Likewise.
* tools/gpgtar-list.c (read_header): Return an error code.
(gpgtar_list): Return an error code, fix error handling.
(gpgtar_read_header): Return an error code.
* tools/gpgtar.c: Add missing include.
(main): Print an generic error message if a command failed and no
error has been printed yet.
* tools/gpgtar.h (gpgtar_{create,extract,list,read_header}): Fix the
prototypes accordingly.

Signed-off-by: Justus Winter <justus@g10code.com>
This commit is contained in:
Justus Winter 2015-11-25 13:39:50 +01:00
parent 40dbee86f3
commit f76fb047c1
5 changed files with 51 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

42
tools/gpgtar-list.c
View file

@ -169,10 +169,11 @@ parse_header (const void *record, const char *filename)
/* Read the next block, assming it is a tar header. Returns a header
object on success or NULL one error. In case of an error an error
object on success in R_HEADER, or an error. If the stream is
consumed, R_HEADER is set to NULL. In case of an error an error
message has been printed. */
static tar_header_t
read_header (estream_t stream)
static gpg_error_t
read_header (estream_t stream, tar_header_t *r_header)
{
gpg_error_t err;
char record[RECORDSIZE];
@ -180,7 +181,7 @@ read_header (estream_t stream)
err = read_record (stream, record);
if (err)
return NULL;
return err;
for (i=0; i < RECORDSIZE && !record[i]; i++)
;
@ -190,8 +191,8 @@ read_header (estream_t stream)
end of archive mark. */
err = read_record (stream, record);
if (err)
return NULL;
return err;
for (i=0; i < RECORDSIZE && !record[i]; i++)
;
if (i != RECORDSIZE)
@ -200,11 +201,13 @@ read_header (estream_t stream)
else
{
/* End of archive - FIXME: we might want to check for garbage. */
return NULL;
*r_header = NULL;
return 0;
}
}
return parse_header (record, es_fname_get (stream));
*r_header = parse_header (record, es_fname_get (stream));
return *r_header ? 0 : gpg_error_from_syserror ();
}
@ -267,13 +270,13 @@ print_header (tar_header_t header, estream_t out)
/* List the tarball FILENAME or, if FILENAME is NULL, the tarball read
from stdin. */
void
gpg_error_t
gpgtar_list (const char *filename, int decrypt)
{
gpg_error_t err;
estream_t stream;
estream_t cipher_stream = NULL;
tar_header_t header;
tar_header_t header = NULL;
if (filename)
{
@ -285,7 +288,7 @@ gpgtar_list (const char *filename, int decrypt)
{
err = gpg_error_from_syserror ();
log_error ("error opening '%s': %s\n", filename, gpg_strerror (err));
return;
return err;
}
}
else
@ -314,12 +317,12 @@ gpgtar_list (const char *filename, int decrypt)
for (;;)
{
header = read_header (stream);
if (!header)
err = read_header (stream, &header);
if (err || header == NULL)
goto leave;
print_header (header, es_stdout);
if (skip_data (stream, header))
goto leave;
xfree (header);
@ -333,14 +336,13 @@ gpgtar_list (const char *filename, int decrypt)
es_fclose (stream);
if (stream != cipher_stream)
es_fclose (cipher_stream);
return;
return err;
}
tar_header_t
gpgtar_read_header (estream_t stream)
gpg_error_t
gpgtar_read_header (estream_t stream, tar_header_t *r_header)
{
/*FIXME: Change to return an error code. */
return read_header (stream);
return read_header (stream, r_header);
}
void