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cde/src/cmd/ksh93/include/shell.h
Johnothan King 733f70e94b
Fix many compiler warnings and remove unused variables (#191) 
Most of these changes remove unused variables, functions and labels
to fix -Wunused compiler warnings. Somewhat notable changes:

src/cmd/ksh93/bltins/print.c:
- Removed the unused 'neg' variable.
  Patch from ksh2020: https://github.com/att/ast/pull/725

src/cmd/ksh93/bltins/sleep.c:
- Initialized ns to fix three -Wsometimes-uninitialized warnings.

src/cmd/ksh93/edit/{emacs,vi}.c:
- Adjust strncpy size to fix two -Wstringop-truncation warnings.

src/cmd/ksh93/include/shell.h:
- The NOT_USED macro caused many -Wunused-value warnings,
  so it has been replaced with ksh2020's macro:
  19d0620a

src/cmd/ksh93/sh/expand.c:
- Removed an unnecessary 'ap = ' since 'ap' is never read
  between stakseek and stakfreeze.

src/cmd/ksh93/edit/vi.c: refresh():
- Undef this function's 'w' macro at the end of it to stop it
  potentially interfering with future code changes.

src/cmd/ksh93/sh/nvdisc.c,
src/lib/libast/misc/magic.c,
src/lib/libast/regex/regsubexec.c,
src/lib/libast/sfio/sfpool.c,
src/lib/libast/vmalloc/vmbest.c:
- Fixed some indentation to silence -Wmisleading-indentation
  warnings.

src/lib/libast/include/ast.h:
- For clang, now only suppress hundreds of -Wparentheses warnings
  as well as a few -Wstring-plus-int warnings.
  Clang's -Wparentheses warns about things like
  	if(foo = bar())
  which assigns to foo and checks the assigned value.
  Clang wants us to change this into
  	if((foo = bar()))
  Clang's -Wstring-plus-int warns about things like
  	"string"+x
  where x is an integer, e.g. "string"+3 represents the string
  "ing". Clang wants us to change that to
  	"string"[3]
  The original versions represent a perfectly valid coding style
  that was common in the 1980s and 1990s and is not going to change
  in this historic code base. (gcc does not complain about these.)

Co-authored-by: Martijn Dekker <martijn@inlv.org>
2021-02-22 22:16:32 +00:00

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/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1982-2012 AT&T Intellectual Property *
* and is licensed under the *
* Eclipse Public License, Version 1.0 *
* by AT&T Intellectual Property *
* *
* A copy of the License is available at *
* http://www.eclipse.org/org/documents/epl-v10.html *
* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* David Korn <dgk@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
#ifndef SH_INTERACTIVE
/*
* David Korn
* AT&T Labs
*
* Interface definitions for shell command language
*
*/
#define SH_VERSION 20071012
#include <ast.h>
#include <cdt.h>
#ifdef _SH_PRIVATE
# include "name.h"
#else
# include <nval.h>
#endif /* _SH_PRIVATE */
/*
* This is a macro that can be used to silence "unused parameter" warnings from the compiler for
* functions which need to accept parameters they do not use because they need to be compatible
* with an interface.
*/
#undef NOT_USED
#define NOT_USED(expr) \
do { \
(void)(expr); \
} while (0)
/* options */
typedef struct
{
unsigned long v[4];
}
Shopt_t;
typedef struct Shell_s Shell_t;
#include <shcmd.h>
typedef void (*Shinit_f)(Shell_t*, int);
#ifndef SH_wait_f_defined
typedef int (*Shwait_f)(int, long, int);
# define SH_wait_f_defined
#endif
union Shnode_u;
typedef union Shnode_u Shnode_t;
/*
* Shell state flags. Used with sh_isstate(), sh_onstate(), sh_offstate().
* See also shell options below. States 0-5 are also used as shell options.
*/
#define SH_NOFORK 0 /* set when fork not necessary */
#define SH_FORKED 7 /* set when process has been forked */
#define SH_PROFILE 8 /* set when processing profiles */
#define SH_NOALIAS 9 /* do not expand non-exported aliases */
#define SH_NOTRACK 10 /* set to disable sftrack() function */
#define SH_STOPOK 11 /* set for stopable builtins */
#define SH_GRACE 12 /* set for timeout grace period */
#define SH_TIMING 13 /* set while timing pipelines */
#define SH_DEFPATH 14 /* set when using default path */
#define SH_INIT 15 /* set when initializing the shell */
#define SH_TTYWAIT 16 /* waiting for keyboard input */
#define SH_FCOMPLETE 17 /* set for filename completion */
#define SH_PREINIT 18 /* set with SH_INIT before parsing options */
#define SH_COMPLETE 19 /* set for command completion */
#define SH_INTESTCMD 20 /* set while test/[ command is being run */
#define SH_XARG 21 /* set while in xarg (command -x) mode */
/*
* Shell options (set -o). Used with sh_isoption(), sh_onoption(), sh_offoption().
* There can be a maximum of 256 (0..0xFF) shell options.
* The short option letters are defined in optksh[] and flagval[] in sh/args.c.
* The long option names are defined in shtab_options[] in data/options.c.
*/
#define SH_CFLAG 0
#define SH_HISTORY 1 /* used also as a state */
#define SH_ERREXIT 2 /* used also as a state */
#define SH_VERBOSE 3 /* used also as a state */
#define SH_MONITOR 4 /* used also as a state */
#define SH_INTERACTIVE 5 /* used also as a state */
#define SH_RESTRICTED 6
#define SH_XTRACE 7
#define SH_KEYWORD 8
#define SH_NOUNSET 9
#define SH_NOGLOB 10
#define SH_ALLEXPORT 11
#if SHOPT_PFSH
#define SH_PFSH 12
#endif
#define SH_IGNOREEOF 13
#define SH_NOCLOBBER 14
#define SH_MARKDIRS 15
#define SH_BGNICE 16
#if SHOPT_VSH
#define SH_VI 17
#define SH_VIRAW 18
#endif
#define SH_TFLAG 19
#define SH_TRACKALL 20
#define SH_SFLAG 21
#define SH_NOEXEC 22
#if SHOPT_ESH
#define SH_GMACS 24
#define SH_EMACS 25
#endif
#define SH_PRIVILEGED 26
#define SH_NOLOG 28
#define SH_NOTIFY 29
#define SH_DICTIONARY 30
#define SH_PIPEFAIL 32
#define SH_GLOBSTARS 33
#define SH_RC 35
#define SH_SHOWME 36
#define SH_LETOCTAL 37
#if SHOPT_BRACEPAT
#define SH_BRACEEXPAND 42
#endif
#define SH_POSIX 46
#define SH_MULTILINE 47
#define SH_NOBACKSLCTRL 48
#define SH_LOGIN_SHELL 67
#define SH_NOUSRPROFILE 79 /* internal use only */
#define SH_COMMANDLINE 0x100 /* bit flag for invocation-only options ('set -o' cannot change them) */
/*
* passed as flags to builtins in Nambltin_t struct when BLT_OPTIM is on
*/
#define SH_BEGIN_OPTIM 0x1
#define SH_END_OPTIM 0x2
/* The following type is used for error messages */
/* error messages */
extern const char e_found[];
extern const char e_format[];
extern const char e_number[];
extern const char e_restricted[];
extern const char e_recursive[];
extern char e_version[];
typedef struct sh_scope
{
struct sh_scope *par_scope;
int argc;
char **argv;
char *cmdname;
char *filename;
char *funname;
int lineno;
Dt_t *var_tree;
struct sh_scope *self;
} Shscope_t;
/*
* Saves the state of the shell
*/
struct Shell_s
{
Shopt_t options; /* set -o options */
Dt_t *var_tree; /* for shell variables */
Dt_t *fun_tree; /* for shell functions */
Dt_t *alias_tree; /* for alias names */
Dt_t *bltin_tree; /* for builtin commands */
Shscope_t *topscope; /* pointer to top-level scope */
int inlineno; /* line number of current input file */
int exitval; /* exit status of the command currently being run */
int savexit; /* $? == exit status of the last command executed */
unsigned char trapnote; /* set when trap/signal is pending */
char shcomp; /* set when running shcomp */
unsigned int subshell; /* set for virtual subshell */
#ifdef _SH_PRIVATE
_SH_PRIVATE
#endif /* _SH_PRIVATE */
};
/* used for builtins */
typedef struct Libcomp_s
{
void* dll;
char* lib;
dev_t dev;
ino_t ino;
unsigned int attr;
} Libcomp_t;
extern Libcomp_t *liblist;
/* flags for sh_parse */
#define SH_NL 1 /* Treat new-lines as ; */
#define SH_EOF 2 /* EOF causes syntax error */
/* symbolic values for sh_iogetiop */
#define SH_IOCOPROCESS (-2)
#define SH_IOHISTFILE (-3)
#include <cmd.h>
/* symbolic value for sh_fdnotify */
#define SH_FDCLOSE (-1)
#undef getenv /* -lshell provides its own */
#if defined(__EXPORT__) && defined(_DLL)
# ifdef _BLD_shell
# define extern __EXPORT__
# endif /* _BLD_shell */
#endif /* _DLL */
extern Dt_t *sh_bltin_tree(void);
extern void sh_subfork(void);
extern Shell_t *sh_init(int,char*[],Shinit_f);
extern int sh_reinit(char*[]);
extern int sh_eval(Sfio_t*,int);
extern void sh_delay(double,int);
extern void *sh_parse(Shell_t*, Sfio_t*,int);
extern int sh_trap(const char*,int);
extern int sh_fun(Namval_t*,Namval_t*, char*[]);
extern int sh_funscope(int,char*[],int(*)(void*),void*,int);
extern Sfio_t *sh_iogetiop(int,int);
extern int sh_main(int, char*[], Shinit_f);
extern int sh_run(int, char*[]);
extern void sh_menu(Sfio_t*, int, char*[]);
extern Namval_t *sh_addbuiltin(const char*, int(*)(int, char*[],Shbltin_t*), void*);
extern char *sh_fmtq(const char*);
extern char *sh_fmtqf(const char*, int, int);
extern Sfdouble_t sh_strnum(const char*, char**, int);
extern int sh_access(const char*,int);
extern int sh_close(int);
extern int sh_chdir(const char*);
extern int sh_dup(int);
extern void sh_exit(int);
extern int sh_fchdir(int);
extern int sh_fcntl(int, int, ...);
extern Sfio_t *sh_fd2sfio(int);
extern int (*sh_fdnotify(int(*)(int,int)))(int,int);
extern Shell_t *sh_getinterp(void);
extern int sh_open(const char*, int, ...);
extern int sh_openmax(void);
extern Sfio_t *sh_pathopen(const char*);
extern ssize_t sh_read(int, void*, size_t);
extern ssize_t sh_write(int, const void*, size_t);
extern off_t sh_seek(int, off_t, int);
extern int sh_pipe(int[]);
extern mode_t sh_umask(mode_t);
extern void *sh_waitnotify(Shwait_f);
extern Shscope_t *sh_getscope(int,int);
extern Shscope_t *sh_setscope(Shscope_t*);
extern void sh_sigcheck(Shell_t*);
extern unsigned long sh_isoption(int);
extern unsigned long sh_onoption(int);
extern unsigned long sh_offoption(int);
extern int sh_waitsafe(void);
extern int sh_exec(const Shnode_t*,int);
/*
* direct access to sh is obsolete, use sh_getinterp() instead
*/
#if !defined(_SH_PRIVATE) && defined(__IMPORT__) && !defined(_BLD_shell)
extern __IMPORT__ Shell_t sh;
#else
extern Shell_t sh;
#endif
#ifdef _DLL
# undef extern
#endif /* _DLL */
#define chdir(a) sh_chdir(a)
#define fchdir(a) sh_fchdir(a)
#ifndef _SH_PRIVATE
# define access(a,b) sh_access(a,b)
# define close(a) sh_close(a)
# define exit(a) sh_exit(a)
# define fcntl(a,b,c) sh_fcntl(a,b,c)
# define pipe(a) sh_pipe(a)
# define read(a,b,c) sh_read(a,b,c)
# define write(a,b,c) sh_write(a,b,c)
# define umask(a) sh_umask(a)
# define dup sh_dup
# if _lib_lseek64
# define open64 sh_open
# define lseek64 sh_seek
# else
# define open sh_open
# define lseek sh_seek
# endif
#endif /* !_SH_PRIVATE */
#define SH_SIGSET 4
#define SH_EXITSIG 0400 /* signal exit bit */
#define SH_EXITMASK (SH_EXITSIG-1) /* normal exit status bits */
#define SH_RUNPROG -1022 /* needs to be negative and < 256 */
#endif /* SH_INTERACTIVE */
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