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Remove unused libcoshell

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The coshell(1) command, which is required for libcoshell to be
useful, is not known to be shipped by any distribution. It was
removed by the ksh-community fork and hence also by 93u+m (in
2940b3f5). The coshell facility as a whole is obsolete and
insecure. For a long time now, the statically linked libcoshell
library has been 40+ kilobytes of dead weight in the ksh binary.

Prior discussion (ksh2020): https://github.com/att/ast/issues/619

src/lib/libcoshell/*:
- Removed.

src/cmd/ksh93/*:
- Remove the SHOPT_COSHELL compiler option (which was enabled) and
  a lot of code that was conditional upon #ifdef SHOPT_COSHELL.

- init.c: e_version[]: Removing SHOPT_COSHELL changed the "J"
  feature identifier in ${.sh.version} to a lowercase "j", which
  was conditional upon SHOPT_BGX (background job extensions).
  But src/cmd/ksh93/RELEASE documents (at 08-12-04, on line 1188):
    | +SHOPT_BGX enables background job extensions. Noted by "J" in
    |  the version string when enabled. [...]
  That is the only available documentation. So change that "j" back
  to a "J", leaving the version string unchanged after this commit.

- jobs.c: job_walk(): We need to keep one 'job_waitsafe(SIGCHLD);'
  call that was conditional upon SHOPT_COSHELL; removing it caused
  a regression test failure in tests/sigchld.sh, 'SIGCHLD blocked
  for script at end of pipeline' (which means that until now, a ksh
  compiled without libcoshell had broken SIGCHLD handling.)

bin/package, src/cmd/INIT/package.sh:
- Don't export COSHELL variable.
This commit is contained in:
Martijn Dekker 2020-07-17 17:13:53 +01:00
parent fbc6cd4286
commit 3613da4240
39 changed files with 87 additions and 4635 deletions
Download patch file Download diff file Expand all files Collapse all files

8
src/cmd/ksh93/bltins/whence.c
View file

@ -193,7 +193,10 @@ static int whence(Shell_t *shp,char **argv, register int flags)
if(flags&V_FLAG)
{
if(nv_isnull(np))
{
errormsg(SH_DICT,ERROR_warn(0),"[DEBUG] is_ufunction ONE: %s", name);
cp = sh_translate(is_ufunction);
}
else if(is_abuiltin(np))
{
if(nv_isattr(np,BLT_SPC))
@ -253,8 +256,11 @@ static int whence(Shell_t *shp,char **argv, register int flags)
const char *command_path = np->nvalue.pathcomp->name;
sfprintf(sfstdout,"%s %s %s/%s\n",name,sh_translate(is_talias),command_path,cp);
}
else if(!np || nv_isnull(np))
else if(np && nv_isnull(np))
{
errormsg(SH_DICT,ERROR_warn(0),"[DEBUG] is_ufunction TWO: %s", name);
sfprintf(sfstdout,"%s%s\n",name,sh_translate(is_ufunction));
}
continue;
}
sfputr(sfstdout,sh_fmtq(name),' ');