Check the return code of fcntl() calls to ensure the close-on-exec
setting succeeded. Otherwise, the PTY and server file descriptors
would become available to the forked client process.
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
iucvtty expects to receive the TERM environment information right
after a connection has been established. Reading this information
can lead to a connection stall (DoS). Introduce a temporary timeout
and fall back to the default TERM environment.
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
The iucvtty_read_msg() now receives the entire message header.
Perform message header checks for specific message types where the
payload length is clearly defined. Also this needs to be done prior
starting the message chunk processing because the message datalen
field will be adjusted based on the read chunks.
Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
If iucvtty_read_data() receives message data and reads less than
MSG_DATA_OFFSET, out-of-bound reads will happen.
Correct and improve the receiving path by always reading the entire
message header. Also improve the "residual" message data handling by
replacing and processing every message now as chunk.
Acked-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
The PTY slave file descriptor is the controlling terminal
allocated for the child process. When all file descriptors
are being closed, a SIGHUP is triggered for the child process.
Keeping the file descriptor in the parent open would prevent
the SIGHUP to be delivered to the child process.
For proper SIGHUP processing, close the file descriptor in
the parent process.
Acked-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Improve handling of TERM environment processing by validating
the received terminal name. If the terminal name is not valid,
a message will be displayed and the default terminal will be used.
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
Signed-off-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Both iucvconn and iucvtty write output for --help to stderr. To be
consistent with other s390-tools and GNU coding guide lines,
fix this by using stdout for tool-generated usage help.
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
When doing parallel builds, we currently get the following error for
iucvterm:
~/s390-tools/iucvterm (bb/holzheu/install-configs)# make install -j
INSTALL iucvterm
CC iucvterm/src/iucvconn.o
INSTALL iucvterm/src
CC iucvterm/src/getopt.o
install: cannot stat 'iucvconn': No such file or directory
install: cannot stat 'iucvtty': No such file or directory
Makefile:19: recipe for target 'install' failed
Fix this and "all" as explicit dependency to the install target.
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Stefan Haberland <sth@linux.vnet.ibm.com>
With gcc 7 we get warnings like the following:
fdasd.c: In function 'main':
fdasd.c:3055:4: warning: this statement may fall through
[-Wimplicit-fallthrough=]
fdasd_exit(&anchor, 0);
^~~~~~~~~~~~~~~~~~~~~~
fdasd.c:3056:3: note: here
default:
^~~~~~~
Fix this by marking functions with "__noreturn" to help gcc.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
This commit is based on the s390-tools-1.39.0 version.
Changes on top of s390-tools-1.39.0:
- Add MIT license to all source files
- Add LICENSE file
- Transform REAMDE to README.md (markdown)
- Add AUTHORS.md file
- Add CONTRIBUTING.md file
- Move changelog from README to CHANGELOG.md file
Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Hendrik Brueckner