| 2 |
- |
1 |
/*
|
|
|
2 |
* Public Domain Bourne/Korn shell
|
|
|
3 |
*/
|
|
|
4 |
|
|
|
5 |
/* $Id: sh.h,v 1.2 1994/05/19 18:32:40 michael Exp michael $ */
|
|
|
6 |
|
|
|
7 |
#include "config.h" /* system and option configuration info */
|
|
|
8 |
|
|
|
9 |
#ifdef HAVE_PROTOTYPES
|
|
|
10 |
# define ARGS(args) args /* prototype declaration */
|
|
|
11 |
#else
|
|
|
12 |
# define ARGS(args) () /* K&R declaration */
|
|
|
13 |
#endif
|
|
|
14 |
|
|
|
15 |
|
|
|
16 |
/* Start of common headers */
|
|
|
17 |
|
|
|
18 |
#include <stdio.h>
|
|
|
19 |
#include <sys/types.h>
|
|
|
20 |
#include <setjmp.h>
|
|
|
21 |
#ifdef HAVE_STDDEF_H
|
|
|
22 |
# include <stddef.h>
|
|
|
23 |
#endif
|
|
|
24 |
|
|
|
25 |
#ifdef HAVE_STDLIB_H
|
|
|
26 |
# include <stdlib.h>
|
|
|
27 |
#else
|
|
|
28 |
/* just a useful subset of what stdlib.h would have */
|
|
|
29 |
extern char * getenv ARGS((const char *));
|
|
|
30 |
extern void * malloc ARGS((size_t));
|
|
|
31 |
extern void * realloc ARGS((void *, size_t));
|
|
|
32 |
extern int free ARGS((void *));
|
|
|
33 |
extern int exit ARGS((int));
|
|
|
34 |
extern int rand ARGS((void));
|
|
|
35 |
extern void srand ARGS((unsigned int));
|
|
|
36 |
extern int atoi ARGS((const char *));
|
|
|
37 |
#endif /* HAVE_STDLIB_H */
|
|
|
38 |
|
|
|
39 |
#ifdef HAVE_UNISTD_H
|
|
|
40 |
# include <unistd.h>
|
|
|
41 |
#else
|
|
|
42 |
/* just a useful subset of what unistd.h would have */
|
|
|
43 |
extern int access ARGS((const char *, int));
|
|
|
44 |
extern int open ARGS((const char *, int, ...));
|
|
|
45 |
extern int creat ARGS((const char *, mode_t));
|
|
|
46 |
extern int read ARGS((int, char *, unsigned));
|
|
|
47 |
extern int write ARGS((int, const char *, unsigned));
|
|
|
48 |
extern off_t lseek ARGS((int, off_t, int));
|
|
|
49 |
extern int close ARGS((int));
|
|
|
50 |
extern int pipe ARGS((int []));
|
|
|
51 |
extern int dup2 ARGS((int, int));
|
|
|
52 |
extern int unlink ARGS((const char *));
|
|
|
53 |
extern int fork ARGS((void));
|
|
|
54 |
extern int execve ARGS((const char *, char * const[], char * const[]));
|
|
|
55 |
extern int chdir ARGS((const char *));
|
|
|
56 |
extern int kill ARGS((pid_t, int));
|
|
|
57 |
extern char *getcwd(); /* no ARGS here - differs on different machines */
|
|
|
58 |
extern int geteuid ARGS((void));
|
|
|
59 |
extern int readlink ARGS((const char *, char *, int));
|
|
|
60 |
extern int getegid ARGS((void));
|
|
|
61 |
extern int getpid ARGS((void));
|
|
|
62 |
extern int getppid ARGS((void));
|
|
|
63 |
extern unsigned int sleep ARGS((unsigned int));
|
|
|
64 |
extern int isatty ARGS((int));
|
|
|
65 |
# ifdef POSIX_PGRP
|
|
|
66 |
extern int getpgrp ARGS((void));
|
|
|
67 |
extern int setpgid ARGS((pid_t, pid_t));
|
|
|
68 |
# endif /* POSIX_PGRP */
|
|
|
69 |
# ifdef BSD_PGRP
|
|
|
70 |
extern int getpgrp ARGS((pid_t));
|
|
|
71 |
extern int setpgrp ARGS((pid_t, pid_t));
|
|
|
72 |
# endif /* BSD_PGRP */
|
|
|
73 |
# ifdef SYSV_PGRP
|
|
|
74 |
extern int getpgrp ARGS((void));
|
|
|
75 |
extern int setpgrp ARGS((void));
|
|
|
76 |
# endif /* SYSV_PGRP */
|
|
|
77 |
#endif /* HAVE_UNISTD_H */
|
|
|
78 |
|
|
|
79 |
#ifdef HAVE_STRING_H
|
|
|
80 |
# include <string.h>
|
|
|
81 |
#else
|
|
|
82 |
# include <strings.h>
|
|
|
83 |
# define strchr index
|
|
|
84 |
# define strrchr rindex
|
|
|
85 |
#endif /* HAVE_STRING_H */
|
|
|
86 |
#ifndef HAVE_STRSTR
|
|
|
87 |
char *strstr ARGS((const char *s, const char *p));
|
|
|
88 |
#endif /* HAVE_STRSTR */
|
|
|
89 |
#ifndef HAVE_STRCASECMP
|
|
|
90 |
int strcasecmp ARGS((const char *s1, const char *s2));
|
|
|
91 |
int strncasecmp ARGS((const char *s1, const char *s2, int n));
|
|
|
92 |
#endif /* HAVE_STRCASECMP */
|
|
|
93 |
|
|
|
94 |
#ifdef HAVE_MEMORY_H
|
|
|
95 |
# include <memory.h>
|
|
|
96 |
#endif
|
|
|
97 |
#ifndef HAVE_MEMSET
|
|
|
98 |
# define memcpy(d, s, n) bcopy(s, d, n)
|
|
|
99 |
# define memcmp(s1, s2, n) bcmp(s1, s2, n)
|
|
|
100 |
void *memset ARGS((void *d, int c, size_t n));
|
|
|
101 |
#endif /* HAVE_MEMSET */
|
|
|
102 |
#ifndef HAVE_MEMMOVE
|
|
|
103 |
# ifdef HAVE_BCOPY
|
|
|
104 |
# define memmove(d, s, n) bcopy(s, d, n)
|
|
|
105 |
# else
|
|
|
106 |
void *memmove ARGS((void *d, const void *s, size_t n));
|
|
|
107 |
# endif
|
|
|
108 |
#endif /* HAVE_MEMMOVE */
|
|
|
109 |
|
|
|
110 |
#ifdef HAVE_PROTOTYPES
|
|
|
111 |
# include <stdarg.h>
|
|
|
112 |
# define SH_VA_START(va, argn) va_start(va, argn)
|
|
|
113 |
#else
|
|
|
114 |
# include <varargs.h>
|
|
|
115 |
# define SH_VA_START(va, argn) va_start(va)
|
|
|
116 |
#endif /* HAVE_PROTOTYPES */
|
|
|
117 |
|
|
|
118 |
#include <errno.h>
|
|
|
119 |
extern int errno;
|
|
|
120 |
|
|
|
121 |
#ifdef HAVE_FCNTL_H
|
|
|
122 |
# include <fcntl.h>
|
|
|
123 |
#else
|
|
|
124 |
# include <sys/file.h>
|
|
|
125 |
#endif /* HAVE_FCNTL_H */
|
|
|
126 |
#ifndef O_ACCMODE
|
|
|
127 |
# define O_ACCMODE (O_RDONLY|O_WRONLY|O_RDWR)
|
|
|
128 |
#endif /* !O_ACCMODE */
|
|
|
129 |
|
|
|
130 |
#ifndef F_OK /* access() arguments */
|
|
|
131 |
# define F_OK 0
|
|
|
132 |
# define X_OK 1
|
|
|
133 |
# define W_OK 2
|
|
|
134 |
# define R_OK 4
|
|
|
135 |
#endif /* !F_OK */
|
|
|
136 |
|
|
|
137 |
#ifndef SEEK_SET
|
|
|
138 |
# ifdef L_SET
|
|
|
139 |
# define SEEK_SET L_SET
|
|
|
140 |
# define SEEK_CUR L_INCR
|
|
|
141 |
# define SEEK_END L_XTND
|
|
|
142 |
# else /* L_SET */
|
|
|
143 |
# define SEEK_SET 0
|
|
|
144 |
# define SEEK_CUR 1
|
|
|
145 |
# define SEEK_END 2
|
|
|
146 |
# endif /* L_SET */
|
|
|
147 |
#endif /* !SEEK_SET */
|
|
|
148 |
|
|
|
149 |
/* Some machines (eg, FreeBSD 1.1.5) define CLK_TCK in limits.h
|
|
|
150 |
* (ksh_limval.h assumes limits has been included, if available)
|
|
|
151 |
*/
|
|
|
152 |
#ifdef HAVE_LIMITS_H
|
|
|
153 |
# include <limits.h>
|
|
|
154 |
#endif /* HAVE_LIMITS_H */
|
|
|
155 |
|
|
|
156 |
#include <signal.h>
|
|
|
157 |
#ifdef NSIG
|
|
|
158 |
# define SIGNALS NSIG
|
|
|
159 |
#else
|
|
|
160 |
# ifdef _MINIX
|
|
|
161 |
# define SIGNALS (_NSIG+1) /* _NSIG is # of signals used, excluding 0. */
|
|
|
162 |
# else
|
|
|
163 |
# ifdef _SIGMAX /* QNX */
|
|
|
164 |
# define SIGNALS _SIGMAX
|
|
|
165 |
# else /* _SIGMAX */
|
|
|
166 |
# define SIGNALS 32
|
|
|
167 |
# endif /* _SIGMAX */
|
|
|
168 |
# endif /* _MINIX */
|
|
|
169 |
#endif /* NSIG */
|
|
|
170 |
#ifndef SIGCHLD
|
|
|
171 |
# define SIGCHLD SIGCLD
|
|
|
172 |
#endif
|
|
|
173 |
/* struct sigaction.sa_flags is set to KSH_SA_FLAGS. Used to ensure
|
|
|
174 |
* system calls are interrupted
|
|
|
175 |
*/
|
|
|
176 |
#ifdef SA_INTERRUPT
|
|
|
177 |
# define KSH_SA_FLAGS SA_INTERRUPT
|
|
|
178 |
#else /* SA_INTERRUPT */
|
|
|
179 |
# define KSH_SA_FLAGS 0
|
|
|
180 |
#endif /* SA_INTERRUPT */
|
|
|
181 |
|
|
|
182 |
typedef RETSIGTYPE (*handler_t) ARGS((int)); /* signal handler */
|
|
|
183 |
|
|
|
184 |
#ifdef USE_FAKE_SIGACT
|
|
|
185 |
# include "sigact.h" /* use sjg's fake sigaction() */
|
|
|
186 |
#endif
|
|
|
187 |
|
|
|
188 |
#ifdef HAVE_PATHS_H
|
|
|
189 |
# include <paths.h>
|
|
|
190 |
#endif /* HAVE_PATHS_H */
|
|
|
191 |
#ifdef _PATH_DEFPATH
|
|
|
192 |
# define DEFAULT__PATH _PATH_DEFPATH
|
|
|
193 |
#else /* _PATH_DEFPATH */
|
|
|
194 |
# define DEFAULT__PATH DEFAULT_PATH
|
|
|
195 |
#endif /* _PATH_DEFPATH */
|
|
|
196 |
|
|
|
197 |
#ifndef offsetof
|
|
|
198 |
# define offsetof(type,id) ((size_t)&((type*)NULL)->id)
|
|
|
199 |
#endif
|
|
|
200 |
|
|
|
201 |
#ifndef HAVE_KILLPG
|
|
|
202 |
# define killpg(p, s) kill(-(p), (s))
|
|
|
203 |
#endif /* !HAVE_KILLPG */
|
|
|
204 |
|
|
|
205 |
/* Special cases for execve(2) */
|
|
|
206 |
#ifdef OS2
|
|
|
207 |
extern int ksh_execve(char *cmd, char **args, char **env, int flags);
|
|
|
208 |
#else /* OS2 */
|
|
|
209 |
# if defined(OS_ISC) && defined(_POSIX_SOURCE)
|
|
|
210 |
/* Kludge for ISC 3.2 (and other versions?) so programs will run correctly. */
|
|
|
211 |
# define ksh_execve(p, av, ev, flags) \
|
|
|
212 |
do { \
|
|
|
213 |
__setostype(0); \
|
|
|
214 |
execve(p, av, ev); \
|
|
|
215 |
__setostype(1); \
|
|
|
216 |
} while (0)
|
|
|
217 |
# else /* OS_ISC && _POSIX */
|
|
|
218 |
# define ksh_execve(p, av, ev, flags) execve(p, av, ev)
|
|
|
219 |
# endif /* OS_ISC && _POSIX */
|
|
|
220 |
#endif /* OS2 */
|
|
|
221 |
|
|
|
222 |
/* this is a hang-over from older versions of the os2 port */
|
|
|
223 |
#define ksh_dupbase(fd, base) fcntl(fd, F_DUPFD, base)
|
|
|
224 |
|
|
|
225 |
#ifdef HAVE_SIGSETJMP
|
|
|
226 |
# define ksh_sigsetjmp(env,sm) sigsetjmp((env), (sm))
|
|
|
227 |
# define ksh_siglongjmp(env,v) siglongjmp((env), (v))
|
|
|
228 |
# define ksh_jmp_buf sigjmp_buf
|
|
|
229 |
#else /* HAVE_SIGSETJMP */
|
|
|
230 |
# ifdef HAVE__SETJMP
|
|
|
231 |
# define ksh_sigsetjmp(env,sm) _setjmp(env)
|
|
|
232 |
# define ksh_siglongjmp(env,v) _longjmp((env), (v))
|
|
|
233 |
# else /* HAVE__SETJMP */
|
|
|
234 |
# define ksh_sigsetjmp(env,sm) setjmp(env)
|
|
|
235 |
# define ksh_siglongjmp(env,v) longjmp((env), (v))
|
|
|
236 |
# endif /* HAVE__SETJMP */
|
|
|
237 |
# define ksh_jmp_buf jmp_buf
|
|
|
238 |
#endif /* HAVE_SIGSETJMP */
|
|
|
239 |
|
|
|
240 |
#ifndef HAVE_DUP2
|
|
|
241 |
extern int dup2 ARGS((int, int));
|
|
|
242 |
#endif /* !HAVE_DUP2 */
|
|
|
243 |
|
|
|
244 |
/* Find a integer type that is at least 32 bits (or die) - SIZEOF_* defined
|
|
|
245 |
* by autoconf (assumes an 8 bit byte, but I'm not concerned).
|
|
|
246 |
* NOTE: INT32 may end up being more than 32 bits.
|
|
|
247 |
*/
|
|
|
248 |
#ifdef __OLD__
|
|
|
249 |
#if SIZEOF_INT >= 4
|
|
|
250 |
# define INT32 long
|
|
|
251 |
/* #else SIZEOF_INT */
|
|
|
252 |
# if SIZEOF_LONG >= 4
|
|
|
253 |
# define INT32 long
|
|
|
254 |
# else /* SIZEOF_LONG */
|
|
|
255 |
#error cannot find 32 bit type...
|
|
|
256 |
# endif /* SIZEOF_LONG */
|
|
|
257 |
#endif /* SIZEOF_INT */
|
|
|
258 |
#endif
|
|
|
259 |
|
|
|
260 |
#define INT32 long
|
|
|
261 |
|
|
|
262 |
/* end of common headers */
|
|
|
263 |
|
|
|
264 |
/* Stop gcc and lint from complaining about possibly uninitialized variables */
|
|
|
265 |
#if defined(__GNUC__) || defined(lint)
|
|
|
266 |
# define UNINITIALIZED(var) var = 0
|
|
|
267 |
#else
|
|
|
268 |
# define UNINITIALIZED(var) var
|
|
|
269 |
#endif /* GNUC || lint */
|
|
|
270 |
|
|
|
271 |
/* some useful #defines */
|
|
|
272 |
#ifdef EXTERN
|
|
|
273 |
# define I__(i) = i
|
|
|
274 |
#else
|
|
|
275 |
# define I__(i)
|
|
|
276 |
# define EXTERN extern
|
|
|
277 |
# define EXTERN_DEFINED
|
|
|
278 |
#endif
|
|
|
279 |
|
|
|
280 |
#ifdef OS2
|
|
|
281 |
# define inDOS() (!(_emx_env & 0x200))
|
|
|
282 |
#endif
|
|
|
283 |
|
|
|
284 |
#ifndef EXECSHELL
|
|
|
285 |
/* shell to exec scripts (see also $SHELL initialization in main.c) */
|
|
|
286 |
# ifdef OS2
|
|
|
287 |
# define EXECSHELL (inDOS() ? "c:\\command.com" : "c:\\os2\\cmd.exe")
|
|
|
288 |
# define EXECSHELL_STR (inDOS() ? "COMSPEC" : "OS2_SHELL")
|
|
|
289 |
# else /* OS2 */
|
|
|
290 |
# define EXECSHELL "/bin/sh"
|
|
|
291 |
# define EXECSHELL_STR "EXECSHELL"
|
|
|
292 |
# endif /* OS2 */
|
|
|
293 |
#endif
|
|
|
294 |
|
|
|
295 |
/* ISABSPATH() means path is fully and completely specified,
|
|
|
296 |
* ISROOTEDPATH() means a .. as the first component is a no-op,
|
|
|
297 |
* ISRELPATH() means $PWD can be tacked on to get an absolute path.
|
|
|
298 |
*
|
|
|
299 |
* OS Path ISABSPATH ISROOTEDPATH ISRELPATH
|
|
|
300 |
* unix /foo yes yes no
|
|
|
301 |
* unix foo no no yes
|
|
|
302 |
* unix ../foo no no yes
|
|
|
303 |
* os2+cyg a:/foo yes yes no
|
|
|
304 |
* os2+cyg a:foo no no no
|
|
|
305 |
* os2+cyg /foo no yes no
|
|
|
306 |
* os2+cyg foo no no yes
|
|
|
307 |
* os2+cyg ../foo no no yes
|
|
|
308 |
* cyg //foo yes yes no
|
|
|
309 |
*/
|
|
|
310 |
#ifdef OS2
|
|
|
311 |
# define PATHSEP ';'
|
|
|
312 |
# define DIRSEP '/' /* even though \ is native */
|
|
|
313 |
# define DIRSEPSTR "\\"
|
|
|
314 |
# define ISDIRSEP(c) ((c) == '\\' || (c) == '/')
|
|
|
315 |
# define ISABSPATH(s) (((s)[0] && (s)[1] == ':' && ISDIRSEP((s)[2])))
|
|
|
316 |
# define ISROOTEDPATH(s) (ISDIRSEP((s)[0]) || ISABSPATH(s))
|
|
|
317 |
# define ISRELPATH(s) (!(s)[0] || ((s)[1] != ':' && !ISDIRSEP((s)[0])))
|
|
|
318 |
# define FILECHCONV(c) (isascii(c) && isupper(c) ? tolower(c) : c)
|
|
|
319 |
# define FILECMP(s1, s2) stricmp(s1, s2)
|
|
|
320 |
# define FILENCMP(s1, s2, n) strnicmp(s1, s2, n)
|
|
|
321 |
extern char *ksh_strchr_dirsep(const char *path);
|
|
|
322 |
extern char *ksh_strrchr_dirsep(const char *path);
|
|
|
323 |
# define chdir _chdir2
|
|
|
324 |
# define getcwd _getcwd2
|
|
|
325 |
#else
|
|
|
326 |
# define PATHSEP ':'
|
|
|
327 |
# define DIRSEP '/'
|
|
|
328 |
# define DIRSEPSTR "/"
|
|
|
329 |
# define ISDIRSEP(c) ((c) == '/')
|
|
|
330 |
#ifdef __CYGWIN__
|
|
|
331 |
# define ISABSPATH(s) \
|
|
|
332 |
(((s)[0] && (s)[1] == ':' && ISDIRSEP((s)[2])) || ISDIRSEP((s)[0]))
|
|
|
333 |
# define ISRELPATH(s) (!(s)[0] || ((s)[1] != ':' && !ISDIRSEP((s)[0])))
|
|
|
334 |
#else /* __CYGWIN__ */
|
|
|
335 |
# define ISABSPATH(s) ISDIRSEP((s)[0])
|
|
|
336 |
# define ISRELPATH(s) (!ISABSPATH(s))
|
|
|
337 |
#endif /* __CYGWIN__ */
|
|
|
338 |
# define ISROOTEDPATH(s) ISABSPATH(s)
|
|
|
339 |
# define FILECHCONV(c) c
|
|
|
340 |
# define FILECMP(s1, s2) strcmp(s1, s2)
|
|
|
341 |
# define FILENCMP(s1, s2, n) strncmp(s1, s2, n)
|
|
|
342 |
# define ksh_strchr_dirsep(p) strchr(p, DIRSEP)
|
|
|
343 |
# define ksh_strrchr_dirsep(p) strrchr(p, DIRSEP)
|
|
|
344 |
#endif
|
|
|
345 |
|
|
|
346 |
typedef int bool_t;
|
|
|
347 |
#define FALSE 0
|
|
|
348 |
#define TRUE 1
|
|
|
349 |
|
|
|
350 |
#define NELEM(a) (sizeof(a) / sizeof((a)[0]))
|
|
|
351 |
#define sizeofN(type, n) (sizeof(type) * (n))
|
|
|
352 |
#define BIT(i) (1<<(i)) /* define bit in flag */
|
|
|
353 |
|
|
|
354 |
/* Table flag type - needs > 16 and < 32 bits */
|
|
|
355 |
typedef INT32 Tflag;
|
|
|
356 |
|
|
|
357 |
#define NUFILE 10 /* Number of user-accessible files */
|
|
|
358 |
#define FDBASE 10 /* First file usable by Shell */
|
|
|
359 |
|
|
|
360 |
/* you're not going to run setuid shell scripts, are you? */
|
|
|
361 |
#define eaccess(path, mode) access(path, mode)
|
|
|
362 |
|
|
|
363 |
/* Make MAGIC a char that might be printed to make bugs more obvious, but
|
|
|
364 |
* not a char that is used often. Also, can't use the high bit as it causes
|
|
|
365 |
* portability problems (calling strchr(x, 0x80|'x') is error prone).
|
|
|
366 |
*/
|
|
|
367 |
#define MAGIC (7)/* prefix for *?[!{,} during expand */
|
|
|
368 |
#define ISMAGIC(c) ((unsigned char)(c) == MAGIC)
|
|
|
369 |
#define NOT '!' /* might use ^ (ie, [!...] vs [^..]) */
|
|
|
370 |
|
|
|
371 |
#define LINE 1024 /* input line size */
|
|
|
372 |
#define PATH 1024 /* pathname size (todo: PATH_MAX/pathconf()) */
|
|
|
373 |
#define ARRAYMAX 1023 /* max array index */
|
|
|
374 |
|
|
|
375 |
EXTERN const char *kshname; /* $0 */
|
|
|
376 |
EXTERN pid_t kshpid; /* $$, shell pid */
|
|
|
377 |
EXTERN pid_t procpid; /* pid of executing process */
|
|
|
378 |
EXTERN int ksheuid; /* effective uid of shell */
|
|
|
379 |
EXTERN int exstat; /* exit status */
|
|
|
380 |
EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
|
|
|
381 |
EXTERN const char *safe_prompt; /* safe prompt if PS1 substitution fails */
|
|
|
382 |
|
|
|
383 |
|
|
|
384 |
/*
|
|
|
385 |
* Area-based allocation built on malloc/free
|
|
|
386 |
*/
|
|
|
387 |
|
|
|
388 |
typedef struct Area {
|
|
|
389 |
struct Block *freelist; /* free list */
|
|
|
390 |
} Area;
|
|
|
391 |
|
|
|
392 |
EXTERN Area aperm; /* permanent object space */
|
|
|
393 |
#define APERM &aperm
|
|
|
394 |
#define ATEMP &e->area
|
|
|
395 |
|
|
|
396 |
#ifdef MEM_DEBUG
|
|
|
397 |
# include "chmem.h" /* a debugging front end for malloc et. al. */
|
|
|
398 |
#endif /* MEM_DEBUG */
|
|
|
399 |
|
|
|
400 |
#ifdef KSH_DEBUG
|
|
|
401 |
# define kshdebug_init() kshdebug_init_()
|
|
|
402 |
# define kshdebug_printf(a) kshdebug_printf_ a
|
|
|
403 |
# define kshdebug_dump(a) kshdebug_dump_ a
|
|
|
404 |
#else /* KSH_DEBUG */
|
|
|
405 |
# define kshdebug_init()
|
|
|
406 |
# define kshdebug_printf(a)
|
|
|
407 |
# define kshdebug_dump(a)
|
|
|
408 |
#endif /* KSH_DEBUG */
|
|
|
409 |
|
|
|
410 |
|
|
|
411 |
/*
|
|
|
412 |
* parsing & execution environment
|
|
|
413 |
*/
|
|
|
414 |
EXTERN struct env {
|
|
|
415 |
short type; /* enviroment type - see below */
|
|
|
416 |
short flags; /* EF_* */
|
|
|
417 |
Area area; /* temporary allocation area */
|
|
|
418 |
struct block *loc; /* local variables and functions */
|
|
|
419 |
short *savefd; /* original redirected fd's */
|
|
|
420 |
struct env *oenv; /* link to previous enviroment */
|
|
|
421 |
ksh_jmp_buf jbuf; /* long jump back to env creator */
|
|
|
422 |
struct temp *temps; /* temp files */
|
|
|
423 |
} *e;
|
|
|
424 |
|
|
|
425 |
/* struct env.type values */
|
|
|
426 |
#define E_NONE 0 /* dummy enviroment */
|
|
|
427 |
#define E_PARSE 1 /* parsing command # */
|
|
|
428 |
#define E_FUNC 2 /* executing function # */
|
|
|
429 |
#define E_INCL 3 /* including a file via . # */
|
|
|
430 |
#define E_EXEC 4 /* executing command tree */
|
|
|
431 |
#define E_LOOP 5 /* executing for/while # */
|
|
|
432 |
#define E_ERRH 6 /* general error handler # */
|
|
|
433 |
/* # indicates env has valid jbuf (see unwind()) */
|
|
|
434 |
|
|
|
435 |
/* struct env.flag values */
|
|
|
436 |
#define EF_FUNC_PARSE BIT(0) /* function being parsed */
|
|
|
437 |
#define EF_BRKCONT_PASS BIT(1) /* set if E_LOOP must pass break/continue on */
|
|
|
438 |
#define EF_FAKE_SIGDIE BIT(2) /* hack to get info from unwind to quitenv */
|
|
|
439 |
|
|
|
440 |
/* Do breaks/continues stop at env type e? */
|
|
|
441 |
#define STOP_BRKCONT(t) ((t) == E_NONE || (t) == E_PARSE \
|
|
|
442 |
|| (t) == E_FUNC || (t) == E_INCL)
|
|
|
443 |
/* Do returns stop at env type e? */
|
|
|
444 |
#define STOP_RETURN(t) ((t) == E_FUNC || (t) == E_INCL)
|
|
|
445 |
|
|
|
446 |
/* values for ksh_siglongjmp(e->jbuf, 0) */
|
|
|
447 |
#define LRETURN 1 /* return statement */
|
|
|
448 |
#define LEXIT 2 /* exit statement */
|
|
|
449 |
#define LERROR 3 /* errorf() called */
|
|
|
450 |
#define LLEAVE 4 /* untrappable exit/error */
|
|
|
451 |
#define LINTR 5 /* ^C noticed */
|
|
|
452 |
#define LBREAK 6 /* break statement */
|
|
|
453 |
#define LCONTIN 7 /* continue statement */
|
|
|
454 |
#define LSHELL 8 /* return to interactive shell() */
|
|
|
455 |
#define LAEXPR 9 /* error in arithmetic expression */
|
|
|
456 |
|
|
|
457 |
|
|
|
458 |
/* option processing */
|
|
|
459 |
#define OF_CMDLINE 0x01 /* command line */
|
|
|
460 |
#define OF_SET 0x02 /* set builtin */
|
|
|
461 |
#define OF_SPECIAL 0x04 /* a special variable changing */
|
|
|
462 |
#define OF_INTERNAL 0x08 /* set internally by shell */
|
|
|
463 |
#define OF_ANY (OF_CMDLINE | OF_SET | OF_SPECIAL | OF_INTERNAL)
|
|
|
464 |
|
|
|
465 |
struct option {
|
|
|
466 |
const char *name; /* long name of option */
|
|
|
467 |
char c; /* character flag (if any) */
|
|
|
468 |
short flags; /* OF_* */
|
|
|
469 |
};
|
|
|
470 |
extern const struct option options[];
|
|
|
471 |
|
|
|
472 |
/*
|
|
|
473 |
* flags (the order of these enums MUST match the order in misc.c(options[]))
|
|
|
474 |
*/
|
|
|
475 |
enum sh_flag {
|
|
|
476 |
FEXPORT = 0, /* -a: export all */
|
|
|
477 |
#ifdef BRACE_EXPAND
|
|
|
478 |
FBRACEEXPAND, /* enable {} globbing */
|
|
|
479 |
#endif
|
|
|
480 |
FBGNICE, /* bgnice */
|
|
|
481 |
FCOMMAND, /* -c: (invocation) execute specified command */
|
|
|
482 |
#ifdef EMACS
|
|
|
483 |
FEMACS, /* emacs command editing */
|
|
|
484 |
#endif
|
|
|
485 |
FERREXIT, /* -e: quit on error */
|
|
|
486 |
#ifdef EMACS
|
|
|
487 |
FGMACS, /* gmacs command editing */
|
|
|
488 |
#endif
|
|
|
489 |
FIGNOREEOF, /* eof does not exit */
|
|
|
490 |
FTALKING, /* -i: interactive */
|
|
|
491 |
FKEYWORD, /* -k: name=value anywere */
|
|
|
492 |
FLOGIN, /* -l: a login shell */
|
|
|
493 |
FMARKDIRS, /* mark dirs with / in file name completion */
|
|
|
494 |
FMONITOR, /* -m: job control monitoring */
|
|
|
495 |
FNOCLOBBER, /* -C: don't overwrite existing files */
|
|
|
496 |
FNOEXEC, /* -n: don't execute any commands */
|
|
|
497 |
FNOGLOB, /* -f: don't do file globbing */
|
|
|
498 |
FNOHUP, /* -H: don't kill running jobs when login shell exits */
|
|
|
499 |
FNOTTALKING, /* -I: don't be interactive */
|
|
|
500 |
FNOLOG, /* don't save functions in history (ignored) */
|
|
|
501 |
#ifdef JOBS
|
|
|
502 |
FNOTIFY, /* -b: asynchronous job completion notification */
|
|
|
503 |
#endif
|
|
|
504 |
FNOUNSET, /* -u: using an unset var is an error */
|
|
|
505 |
FPHYSICAL, /* -o physical: don't do logical cd's/pwd's */
|
|
|
506 |
FPOSIX, /* -o posix: be posixly correct */
|
|
|
507 |
FPRIVILEGED, /* -p: use suid_profile */
|
|
|
508 |
FRESTRICTED, /* -r: restricted shell */
|
|
|
509 |
FSTDIN, /* -s: (invocation) parse stdin */
|
|
|
510 |
FTRACKALL, /* -h: create tracked aliases for all commands */
|
|
|
511 |
FVERBOSE, /* -v: echo input */
|
|
|
512 |
#ifdef VI
|
|
|
513 |
FVI, /* vi command editing */
|
|
|
514 |
FVIRAW, /* always read in raw mode (ignored) */
|
|
|
515 |
FVISHOW8, /* display chars with 8th bit set as is (versus M-) */
|
|
|
516 |
FVITABCOMPLETE, /* enable tab as file name completion char */
|
|
|
517 |
FVIESCCOMPLETE, /* enable ESC as file name completion in command mode */
|
|
|
518 |
#endif
|
|
|
519 |
FXTRACE, /* -x: execution trace */
|
|
|
520 |
FTALKING_I, /* (internal): initial shell was interactive */
|
|
|
521 |
FNFLAGS /* (place holder: how many flags are there) */
|
|
|
522 |
};
|
|
|
523 |
|
|
|
524 |
#define Flag(f) (shell_flags[(int) (f)])
|
|
|
525 |
|
|
|
526 |
EXTERN char shell_flags [FNFLAGS];
|
|
|
527 |
|
|
|
528 |
EXTERN char null [] I__(""); /* null value for variable */
|
|
|
529 |
EXTERN char space [] I__(" ");
|
|
|
530 |
EXTERN char newline [] I__("\n");
|
|
|
531 |
EXTERN char slash [] I__("/");
|
|
|
532 |
|
|
|
533 |
enum temp_type {
|
|
|
534 |
TT_HEREDOC_EXP, /* expanded heredoc */
|
|
|
535 |
TT_HIST_EDIT /* temp file used for history editing (fc -e) */
|
|
|
536 |
};
|
|
|
537 |
typedef enum temp_type Temp_type;
|
|
|
538 |
/* temp/heredoc files. The file is removed when the struct is freed. */
|
|
|
539 |
struct temp {
|
|
|
540 |
struct temp *next;
|
|
|
541 |
struct shf *shf;
|
|
|
542 |
int pid; /* pid of process parsed here-doc */
|
|
|
543 |
Temp_type type;
|
|
|
544 |
char *name;
|
|
|
545 |
};
|
|
|
546 |
|
|
|
547 |
/*
|
|
|
548 |
* stdio and our IO routines
|
|
|
549 |
*/
|
|
|
550 |
|
|
|
551 |
#define shl_spare (&shf_iob[0]) /* for c_read()/c_print() */
|
|
|
552 |
#define shl_stdout (&shf_iob[1])
|
|
|
553 |
#define shl_out (&shf_iob[2])
|
|
|
554 |
EXTERN int shl_stdout_ok;
|
|
|
555 |
|
|
|
556 |
/*
|
|
|
557 |
* trap handlers
|
|
|
558 |
*/
|
|
|
559 |
typedef struct trap {
|
|
|
560 |
int signal; /* signal number */
|
|
|
561 |
const char *name; /* short name */
|
|
|
562 |
const char *mess; /* descriptive name */
|
|
|
563 |
char *trap; /* trap command */
|
|
|
564 |
int volatile set; /* trap pending */
|
|
|
565 |
int flags; /* TF_* */
|
|
|
566 |
handler_t cursig; /* current handler (valid if TF_ORIG_* set) */
|
|
|
567 |
handler_t shtrap; /* shell signal handler */
|
|
|
568 |
} Trap;
|
|
|
569 |
|
|
|
570 |
/* values for Trap.flags */
|
|
|
571 |
#define TF_SHELL_USES BIT(0) /* shell uses signal, user can't change */
|
|
|
572 |
#define TF_USER_SET BIT(1) /* user has (tried to) set trap */
|
|
|
573 |
#define TF_ORIG_IGN BIT(2) /* original action was SIG_IGN */
|
|
|
574 |
#define TF_ORIG_DFL BIT(3) /* original action was SIG_DFL */
|
|
|
575 |
#define TF_EXEC_IGN BIT(4) /* restore SIG_IGN just before exec */
|
|
|
576 |
#define TF_EXEC_DFL BIT(5) /* restore SIG_DFL just before exec */
|
|
|
577 |
#define TF_DFL_INTR BIT(6) /* when received, default action is LINTR */
|
|
|
578 |
#define TF_TTY_INTR BIT(7) /* tty generated signal (see j_waitj) */
|
|
|
579 |
#define TF_CHANGED BIT(8) /* used by runtrap() to detect trap changes */
|
|
|
580 |
#define TF_FATAL BIT(9) /* causes termination if not trapped */
|
|
|
581 |
|
|
|
582 |
/* values for setsig()/setexecsig() flags argument */
|
|
|
583 |
#define SS_RESTORE_MASK 0x3 /* how to restore a signal before an exec() */
|
|
|
584 |
#define SS_RESTORE_CURR 0 /* leave current handler in place */
|
|
|
585 |
#define SS_RESTORE_ORIG 1 /* restore original handler */
|
|
|
586 |
#define SS_RESTORE_DFL 2 /* restore to SIG_DFL */
|
|
|
587 |
#define SS_RESTORE_IGN 3 /* restore to SIG_IGN */
|
|
|
588 |
#define SS_FORCE BIT(3) /* set signal even if original signal ignored */
|
|
|
589 |
#define SS_USER BIT(4) /* user is doing the set (ie, trap command) */
|
|
|
590 |
#define SS_SHTRAP BIT(5) /* trap for internal use (CHLD,ALRM,WINCH) */
|
|
|
591 |
|
|
|
592 |
#define SIGEXIT_ 0 /* for trap EXIT */
|
|
|
593 |
#define SIGERR_ SIGNALS /* for trap ERR */
|
|
|
594 |
|
|
|
595 |
EXTERN int volatile trap; /* traps pending? */
|
|
|
596 |
EXTERN int volatile intrsig; /* pending trap interrupts executing command */
|
|
|
597 |
EXTERN int volatile fatal_trap;/* received a fatal signal */
|
|
|
598 |
#ifndef FROM_TRAP_C
|
|
|
599 |
/* Kludge to avoid bogus re-declaration of sigtraps[] error on AIX 3.2.5 */
|
|
|
600 |
extern Trap sigtraps[SIGNALS+1];
|
|
|
601 |
#endif /* !FROM_TRAP_C */
|
|
|
602 |
|
|
|
603 |
|
|
|
604 |
#ifdef KSH
|
|
|
605 |
/*
|
|
|
606 |
* TMOUT support
|
|
|
607 |
*/
|
|
|
608 |
/* values for ksh_tmout_state */
|
|
|
609 |
enum tmout_enum {
|
|
|
610 |
TMOUT_EXECUTING = 0, /* executing commands */
|
|
|
611 |
TMOUT_READING, /* waiting for input */
|
|
|
612 |
TMOUT_LEAVING /* have timed out */
|
|
|
613 |
};
|
|
|
614 |
EXTERN unsigned int ksh_tmout;
|
|
|
615 |
EXTERN enum tmout_enum ksh_tmout_state I__(TMOUT_EXECUTING);
|
|
|
616 |
#endif /* KSH */
|
|
|
617 |
|
|
|
618 |
|
|
|
619 |
/* For "You have stopped jobs" message */
|
|
|
620 |
EXTERN int really_exit;
|
|
|
621 |
|
|
|
622 |
|
|
|
623 |
/*
|
|
|
624 |
* fast character classes
|
|
|
625 |
*/
|
|
|
626 |
#define C_ALPHA BIT(0) /* a-z_A-Z */
|
|
|
627 |
#define C_DIGIT BIT(1) /* 0-9 */
|
|
|
628 |
#define C_LEX1 BIT(2) /* \0 \t\n|&;<>() */
|
|
|
629 |
#define C_VAR1 BIT(3) /* *@#!$-? */
|
|
|
630 |
#define C_IFSWS BIT(4) /* \t \n (IFS white space) */
|
|
|
631 |
#define C_SUBOP1 BIT(5) /* "=-+?" */
|
|
|
632 |
#define C_SUBOP2 BIT(6) /* "#%" */
|
|
|
633 |
#define C_IFS BIT(7) /* $IFS */
|
|
|
634 |
#define C_QUOTE BIT(8) /* \n\t"#$&'()*;<>?[\`| (needing quoting) */
|
|
|
635 |
|
|
|
636 |
extern short ctypes [];
|
|
|
637 |
|
|
|
638 |
#define ctype(c, t) !!(ctypes[(unsigned char)(c)]&(t))
|
|
|
639 |
#define letter(c) ctype(c, C_ALPHA)
|
|
|
640 |
#define digit(c) ctype(c, C_DIGIT)
|
|
|
641 |
#define letnum(c) ctype(c, C_ALPHA|C_DIGIT)
|
|
|
642 |
|
|
|
643 |
EXTERN int ifs0 I__(' '); /* for "$*" */
|
|
|
644 |
|
|
|
645 |
|
|
|
646 |
/* Argument parsing for built-in commands and getopts command */
|
|
|
647 |
|
|
|
648 |
/* Values for Getopt.flags */
|
|
|
649 |
#define GF_ERROR BIT(0) /* call errorf() if there is an error */
|
|
|
650 |
#define GF_PLUSOPT BIT(1) /* allow +c as an option */
|
|
|
651 |
#define GF_NONAME BIT(2) /* don't print argv[0] in errors */
|
|
|
652 |
|
|
|
653 |
/* Values for Getopt.info */
|
|
|
654 |
#define GI_MINUS BIT(0) /* an option started with -... */
|
|
|
655 |
#define GI_PLUS BIT(1) /* an option started with +... */
|
|
|
656 |
#define GI_MINUSMINUS BIT(2) /* arguments were ended with -- */
|
|
|
657 |
|
|
|
658 |
typedef struct {
|
|
|
659 |
int optind;
|
|
|
660 |
int uoptind;/* what user sees in $OPTIND */
|
|
|
661 |
char *optarg;
|
|
|
662 |
int flags; /* see GF_* */
|
|
|
663 |
int info; /* see GI_* */
|
|
|
664 |
unsigned int p; /* 0 or index into argv[optind - 1] */
|
|
|
665 |
char buf[2]; /* for bad option OPTARG value */
|
|
|
666 |
} Getopt;
|
|
|
667 |
|
|
|
668 |
EXTERN Getopt builtin_opt; /* for shell builtin commands */
|
|
|
669 |
EXTERN Getopt user_opt; /* parsing state for getopts builtin command */
|
|
|
670 |
|
|
|
671 |
|
|
|
672 |
#ifdef KSH
|
|
|
673 |
/* This for co-processes */
|
|
|
674 |
|
|
|
675 |
typedef INT32 Coproc_id; /* something that won't (realisticly) wrap */
|
|
|
676 |
struct coproc {
|
|
|
677 |
int read; /* pipe from co-process's stdout */
|
|
|
678 |
int readw; /* other side of read (saved temporarily) */
|
|
|
679 |
int write; /* pipe to co-process's stdin */
|
|
|
680 |
Coproc_id id; /* id of current output pipe */
|
|
|
681 |
int njobs; /* number of live jobs using output pipe */
|
|
|
682 |
void *job; /* 0 or job of co-process using input pipe */
|
|
|
683 |
};
|
|
|
684 |
EXTERN struct coproc coproc;
|
|
|
685 |
#endif /* KSH */
|
|
|
686 |
|
|
|
687 |
/* Used in jobs.c and by coprocess stuff in exec.c */
|
|
|
688 |
#ifdef JOB_SIGS
|
|
|
689 |
EXTERN sigset_t sm_default, sm_sigchld;
|
|
|
690 |
#endif /* JOB_SIGS */
|
|
|
691 |
|
|
|
692 |
extern const char ksh_version[];
|
|
|
693 |
|
|
|
694 |
/* name of called builtin function (used by error functions) */
|
|
|
695 |
EXTERN char *builtin_argv0;
|
|
|
696 |
EXTERN Tflag builtin_flag; /* flags of called builtin (SPEC_BI, etc.) */
|
|
|
697 |
|
|
|
698 |
/* current working directory, and size of memory allocated for same */
|
|
|
699 |
EXTERN char *current_wd;
|
|
|
700 |
EXTERN int current_wd_size;
|
|
|
701 |
|
|
|
702 |
#ifdef EDIT
|
|
|
703 |
/* Minimium required space to work with on a line - if the prompt leaves less
|
|
|
704 |
* space than this on a line, the prompt is truncated.
|
|
|
705 |
*/
|
|
|
706 |
# define MIN_EDIT_SPACE 7
|
|
|
707 |
/* Minimium allowed value for x_cols: 2 for prompt, 3 for " < " at end of line
|
|
|
708 |
*/
|
|
|
709 |
# define MIN_COLS (2 + MIN_EDIT_SPACE + 3)
|
|
|
710 |
EXTERN int x_cols I__(80); /* tty columns */
|
|
|
711 |
#else
|
|
|
712 |
# define x_cols 80 /* for pr_menu(exec.c) */
|
|
|
713 |
#endif
|
|
|
714 |
|
|
|
715 |
|
|
|
716 |
/* These to avoid bracket matching problems */
|
|
|
717 |
#define OPAREN '('
|
|
|
718 |
#define CPAREN ')'
|
|
|
719 |
#define OBRACK '['
|
|
|
720 |
#define CBRACK ']'
|
|
|
721 |
#define OBRACE '{'
|
|
|
722 |
#define CBRACE '}'
|
|
|
723 |
|
|
|
724 |
/* Determine the location of the system (common) profile */
|
|
|
725 |
#ifndef KSH_SYSTEM_PROFILE
|
|
|
726 |
# ifdef __NeXT
|
|
|
727 |
# define KSH_SYSTEM_PROFILE "/etc/profile.std"
|
|
|
728 |
# else /* __NeXT */
|
|
|
729 |
# define KSH_SYSTEM_PROFILE "/etc/profile"
|
|
|
730 |
# endif /* __NeXT */
|
|
|
731 |
#endif /* KSH_SYSTEM_PROFILE */
|
|
|
732 |
|
|
|
733 |
/* Used by v_evaluate() and setstr() to control action when error occurs */
|
|
|
734 |
#define KSH_UNWIND_ERROR 0 /* unwind the stack (longjmp) */
|
|
|
735 |
#define KSH_RETURN_ERROR 1 /* return 1/0 for success/failure */
|
|
|
736 |
|
|
|
737 |
#include "shf.h"
|
|
|
738 |
#include "table.h"
|
|
|
739 |
#include "tree.h"
|
|
|
740 |
#include "expand.h"
|
|
|
741 |
#include "lex.h"
|
|
|
742 |
#include "proto.h"
|
|
|
743 |
|
|
|
744 |
/* be sure not to interfere with anyone else's idea about EXTERN */
|
|
|
745 |
#ifdef EXTERN_DEFINED
|
|
|
746 |
# undef EXTERN_DEFINED
|
|
|
747 |
# undef EXTERN
|
|
|
748 |
#endif
|
|
|
749 |
#undef I__
|