sys_procctl(): Make it clear that negative commands are invalid
An initial reading of the preamble of sys_procctl() gives the impression
that no test prevents a malicious user from passing a negative commands
index (in 'uap->com'), which is soon used as an index into the static
array procctl_cmds_info[].
However, a closer examination leads to the conclusion that the existing
code is technically correct. Indeed, the comparison of 'uap->com' to
the nitems() expression, which expands to a ratio of sizeof(), leads to
a conversion of 'uap->com' to an 'unsigned int' as per Usual Arithmetic
Conversions/Integer Promotions applied by '<=', because sizeof() returns
'size_t' values, and we define 'size_t' as an equivalent of 'unsigned
int' (which is not mandated by the standard, the latter allowing, e.g.,
integers of lower ranks).
With this conversion, negative values of 'uap->com' are automatically
ruled-out since they are converted to very big unsigned integers which
are caught by the test. An analysis of assembly code produced by LLVM
[16 lines not shown]
script: handle terminal resize on SIGWINCH
Add a -w flag to forward terminal resize events on to the child, which
can be useful in some circumstances to avoid terminal corruption.
Reviewed by: des
Co-authored-by: Xavier Beaudouin <xavier.beaudouin at klarasystems.com>
Sponsored by: Modirum MDPay
Sponsored by: Klara, Inc.
(cherry picked from commit 8ceac8e13dccbe4e177c8f2f443b87b7d2e3edb3)
script: minor style improvements
Fix some nits pointed out by checkstyle9.pl in advance of functional
changes to script(1).
Reviewed by: des
Sponsored by: Modirum MDPay
Sponsored by: Klara, Inc.
(cherry picked from commit 4459abe334eb4dbd416fa8094a64afc065ccd1cc)
script: handle terminal resize on SIGWINCH
Add a -w flag to forward terminal resize events on to the child, which
can be useful in some circumstances to avoid terminal corruption.
Reviewed by: des
Co-authored-by: Xavier Beaudouin <xavier.beaudouin at klarasystems.com>
Sponsored by: Modirum MDPay
Sponsored by: Klara, Inc.
(cherry picked from commit 8ceac8e13dccbe4e177c8f2f443b87b7d2e3edb3)
script: minor style improvements
Fix some nits pointed out by checkstyle9.pl in advance of functional
changes to script(1).
Reviewed by: des
Sponsored by: Modirum MDPay
Sponsored by: Klara, Inc.
(cherry picked from commit 4459abe334eb4dbd416fa8094a64afc065ccd1cc)
package: move OpenBSM auditing into its own package
Move auditing runtime (auditd, etc.) into the new FreeBSD-audit package.
Also move the runtime OpenBSM manual pages from libbsm into auditd so
they get installed with the right package.
Add an UPDATING entry noting the new packages.
Reviewed by: imp, manu
Pull Request: https://github.com/freebsd/freebsd-src/pull/1197
