src/bin/sh/error.h, branch releng/12.4

sh: Make sure to process SIGINT if SETINTON re-enables processing.

2017-06-04T21:58:02Z

If INTON re-enables interrupts, it processes any interrupt that occurred while interrupts were disabled. Make SETINTON do the same.

Renumber copyright clause 4

2017-02-28T23:42:47Z

Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann Pull Request: https://github.com/freebsd/freebsd/pull/96

sh: Move some code from onint() to onsig(), making onint() noreturn.

2014-12-21T23:09:59Z

As a result, the INTON macro which is used many times generates fewer bytes of code.

sh: Allow EV_EXIT through function calls, make {...}
2011-04-23T22:28:56Z
If EV_EXIT causes an exit, use the exception mechanism to unwind redirections and local variables. This way, if the final command is a redirected command, an EXIT trap now executes without the redirections. Because of these changes, EV_EXIT can now be inherited by the body of a function, so do so. This means that a function no longer prevents a fork before an exec being skipped, such as in f() { head -1 /etc/passwd; }; echo $(f) Wrapping a single builtin in a function may still cause an otherwise unnecessary fork with command substitution, however. An exit command or -e failure still invokes the EXIT trap with the original redirections and local variables in place. Note: this depends on SHELLPROC being gone. A SHELLPROC depended on keeping the redirections and local variables and only cleaning up the state to restore them.

sh: Remove special code for shell scripts without magic number.

2011-02-04T22:47:55Z

These are called "shell procedures" in the source. If execve() failed with [ENOEXEC], the shell would reinitialize itself and execute the program as a script. This requires a fair amount of code which is not frequently used (most scripts have a #! magic number). Therefore just execute a new instance of sh (_PATH_BSHELL) to run the script.

sh: Add a function to print warnings (with command name and newline).

2010-12-21T20:47:06Z

This is like error() but without raising an exception. It is particularly useful as a replacement for the warnx macro in bltin/bltin.h.

sh: Add some __dead2 to indicate functions that do not return.

2009-12-24T20:55:14Z

Fix various things about SIGINT handling:

2009-11-22T18:23:30Z

* exception handlers are now run with interrupts disabled, which avoids many race conditions * fix some cases where SIGINT only aborts one command and continues the script, in particular if a SIGINT causes an EINTR error which trumped the interrupt. Example: sh -c 'echo < /some/fifo; echo This should not be printed' The fifo should not have writers. When pressing ctrl+c to abort the open, the shell used to continue with the next command. Example: sh -c '/bin/echo < /some/fifo; echo This should not be printed' Similar. Note, however, that this particular case did not and does not work in interactive mode with job control enabled.

Remove clause 3 from the UCB licenses.

2004-04-06T20:06:54Z

OK'ed by: imp, core

Convert the remaining callers of errmsg() to use strerror(), and remove

2002-09-29T11:37:39Z

errmsg() and its table of error messages.