diff options
Diffstat (limited to 'shell/ash.c')
| -rw-r--r-- | shell/ash.c | 566 |
1 files changed, 171 insertions, 395 deletions
diff --git a/shell/ash.c b/shell/ash.c index 15ec043..216f1c4 100644 --- a/shell/ash.c +++ b/shell/ash.c @@ -267,7 +267,6 @@ static void stunalloc(pointer); static void ungrabstackstr(char *, char *); static char *growstackstr(void); static char *makestrspace(size_t newlen); -static char *sstrdup(const char *); /* * Parse trees for commands are allocated in lifo order, so we use a stack @@ -311,7 +310,6 @@ static int stacknleft = MINSIZE; #define grabstackstr(p) stalloc(stackblocksize() - sstrnleft) - #ifdef DEBUG #define TRACE(param) trace param typedef union node unode; @@ -676,37 +674,22 @@ static void out2c(int c) #define ARISYNTAX 3 /* in arithmetic */ static const char S_I_T[][4] = { - /* 0 */ {CSPCL, CIGN, CIGN, CIGN}, - /* PEOA */ - /* 1 */ {CSPCL, CWORD, CWORD, CWORD}, - /* ' ' */ - /* 2 */ {CNL, CNL, CNL, CNL}, - /* \n */ - /* 3 */ {CWORD, CCTL, CCTL, CWORD}, - /* !*-/:=?[]~ */ - /* 4 */ {CDQUOTE, CENDQUOTE, CWORD, CDQUOTE}, - /* '"' */ - /* 5 */ {CVAR, CVAR, CWORD, CVAR}, - /* $ */ - /* 6 */ {CSQUOTE, CWORD, CENDQUOTE, CSQUOTE}, - /* "'" */ - /* 7 */ {CSPCL, CWORD, CWORD, CLP}, - /* ( */ - /* 8 */ {CSPCL, CWORD, CWORD, CRP}, - /* ) */ - /* 9 */ {CBACK, CBACK, CCTL, CBACK}, - /* \ */ - /* 10 */ {CBQUOTE, CBQUOTE, CWORD, CBQUOTE}, - /* ` */ - /* 11 */ {CENDVAR, CENDVAR, CWORD, CENDVAR}, - /* } */ + {CSPCL, CIGN, CIGN, CIGN}, /* 0, PEOA */ + {CSPCL, CWORD, CWORD, CWORD}, /* 1, ' ' */ + {CNL, CNL, CNL, CNL}, /* 2, \n */ + {CWORD, CCTL, CCTL, CWORD}, /* 3, !*-/:=?[]~ */ + {CDQUOTE, CENDQUOTE, CWORD, CDQUOTE}, /* 4, '"' */ + {CVAR, CVAR, CWORD, CVAR}, /* 5, $ */ + {CSQUOTE, CWORD, CENDQUOTE, CSQUOTE}, /* 6, "'" */ + {CSPCL, CWORD, CWORD, CLP}, /* 7, ( */ + {CSPCL, CWORD, CWORD, CRP}, /* 8, ) */ + {CBACK, CBACK, CCTL, CBACK}, /* 9, \ */ + {CBQUOTE, CBQUOTE, CWORD, CBQUOTE}, /* 10, ` */ + {CENDVAR, CENDVAR, CWORD, CENDVAR}, /* 11, } */ #ifndef USE_SIT_FUNCTION - /* 12 */ {CENDFILE, CENDFILE, CENDFILE, CENDFILE}, - /* PEOF */ - /* 13 */ {CWORD, CWORD, CWORD, CWORD}, - /* 0-9A-Za-z */ - /* 14 */ {CCTL, CCTL, CCTL, CCTL} - /* CTLESC ... */ + {CENDFILE, CENDFILE, CENDFILE, CENDFILE}, /* 12, PEOF */ + {CWORD, CWORD, CWORD, CWORD}, /* 13, 0-9A-Za-z */ + {CCTL, CCTL, CCTL, CCTL} /* 14, CTLESC ... */ #endif }; @@ -766,16 +749,16 @@ static const char syntax_index_table[258] = { /* 0 -130 PEOF */ CENDFILE_CENDFILE_CENDFILE_CENDFILE, /* 1 -129 PEOA */ CSPCL_CIGN_CIGN_CIGN, /* 2 -128 0xff */ CWORD_CWORD_CWORD_CWORD, - /* 3 -127 */ CCTL_CCTL_CCTL_CCTL, - /* CTLQUOTEMARK */ + /* 3 -127 */ CCTL_CCTL_CCTL_CCTL, + /* CTLQUOTEMARK */ /* 4 -126 */ CCTL_CCTL_CCTL_CCTL, /* 5 -125 */ CCTL_CCTL_CCTL_CCTL, /* 6 -124 */ CCTL_CCTL_CCTL_CCTL, /* 7 -123 */ CCTL_CCTL_CCTL_CCTL, /* 8 -122 */ CCTL_CCTL_CCTL_CCTL, /* 9 -121 */ CCTL_CCTL_CCTL_CCTL, - /* 10 -120 */ CCTL_CCTL_CCTL_CCTL, - /* CTLESC */ + /* 10 -120 */ CCTL_CCTL_CCTL_CCTL, + /* CTLESC */ /* 11 -119 */ CWORD_CWORD_CWORD_CWORD, /* 12 -118 */ CWORD_CWORD_CWORD_CWORD, /* 13 -117 */ CWORD_CWORD_CWORD_CWORD, @@ -1107,15 +1090,9 @@ static void onsig(int); static void dotrap(void); static int decode_signal(const char *, int); -static void shprocvar(void); -static void deletefuncs(void); static void setparam(char **); static void freeparam(volatile struct shparam *); -static void find_command(const char *, struct cmdentry *, int, const char *); - -static inline void hashcd(void); - /* reasons for skipping commands (see comment on breakcmd routine) */ #define SKIPBREAK 1 #define SKIPCONT 2 @@ -1583,7 +1560,7 @@ static void setpwd(const char *, int); struct builtincmd { const char *name; int (*const builtinfunc) (int, char **); - /* unsigned flags; */ + //unsigned flags; }; @@ -1660,7 +1637,7 @@ static struct builtincmd *EXECCMD; static struct builtincmd *EVALCMD; /* states */ -#define CONFIG_ASH_JOB_CONTROLTOPPED 1 /* all procs are stopped */ +#define JOBSTOPPED 1 /* all procs are stopped */ #define JOBDONE 2 /* all procs are completed */ /* @@ -1708,7 +1685,6 @@ static int initialpgrp; /* pgrp of shell on invocation */ static int curjob; /* current job */ static int jobctl; #endif -static int intreceived; static struct job *makejob(const union node *, int); static int forkshell(struct job *, const union node *, int); @@ -1769,6 +1745,28 @@ static int cdcmd(int argc, char **argv) /* + * Update curdir (the name of the current directory) in response to a + * cd command. We also call hashcd to let the routines in exec.c know + * that the current directory has changed. + */ + +static void hashcd(void); + +static inline void updatepwd(const char *dir) +{ + hashcd(); /* update command hash table */ + + /* + * If our argument is NULL, we don't know the current directory + */ + if (dir == NULL || curdir == nullstr) { + setpwd(0, 1); + } else { + setpwd(dir, 1); + } +} + +/* * Actually do the chdir. In an interactive shell, print the * directory name if "print" is nonzero. */ @@ -1781,18 +1779,7 @@ static int docd(char *dest, int print) INTON; return -1; } - hashcd(); - /* - * Update curdir (the name of the current directory) in response to a - * cd command. We also call hashcd to let the routines in exec.c know - * that the current directory has changed. - */ - /* If dest is NULL, we don't know the current directory */ - if (dest == NULL || curdir == nullstr) - setpwd(0, 1); - else - setpwd(dest, 1); - + updatepwd(dest); INTON; if (print && iflag) puts(curdir); @@ -1863,6 +1850,7 @@ struct jmploc { #define EXERROR 1 /* a generic error */ #define EXSHELLPROC 2 /* execute a shell procedure */ #define EXEXEC 3 /* command execution failed */ +#define EXREDIR 4 /* redirection error */ static struct jmploc *handler; static int exception; @@ -1911,12 +1899,11 @@ static void onint(void) intpending = 0; sigemptyset(&mysigset); sigprocmask(SIG_SETMASK, &mysigset, NULL); - if (rootshell && iflag) - exraise(EXINT); - else { + if (!(rootshell && iflag)) { signal(SIGINT, SIG_DFL); raise(SIGINT); } + exraise(EXINT); /* NOTREACHED */ } @@ -2101,6 +2088,7 @@ static int oexitstatus; /* saved exit status */ static void evalsubshell(const union node *, int); static void expredir(union node *); +static void prehash(union node *); static void eprintlist(struct strlist *); static union node *parsecmd(int); @@ -2218,6 +2206,7 @@ static inline void evalloop(const union node *n, int flags) loopnest++; status = 0; + flags &= EV_TESTED; for (;;) { evaltree(n->nbinary.ch1, EV_TESTED); if (evalskip) { @@ -2236,7 +2225,7 @@ static inline void evalloop(const union node *n, int flags) if (exitstatus == 0) break; } - evaltree(n->nbinary.ch2, flags & EV_TESTED); + evaltree(n->nbinary.ch2, flags); status = exitstatus; if (evalskip) goto skipping; @@ -2264,9 +2253,10 @@ static void evalfor(const union node *n, int flags) exitstatus = 0; loopnest++; + flags &= EV_TESTED; for (sp = arglist.list; sp; sp = sp->next) { setvar(n->nfor.var, sp->text, 0); - evaltree(n->nfor.body, flags & EV_TESTED); + evaltree(n->nfor.body, flags); if (evalskip) { if (evalskip == SKIPCONT && --skipcount <= 0) { evalskip = 0; @@ -2314,7 +2304,7 @@ static inline void evalcase(const union node *n, int flags) * of all the rest.) */ -static inline void evalpipe(union node *n) +static inline void evalpipe(union node *n, int flags) { struct job *jp; struct nodelist *lp; @@ -2326,24 +2316,12 @@ static inline void evalpipe(union node *n) pipelen = 0; for (lp = n->npipe.cmdlist; lp; lp = lp->next) pipelen++; + flags |= EV_EXIT; INTOFF; jp = makejob(n, pipelen); prevfd = -1; for (lp = n->npipe.cmdlist; lp; lp = lp->next) { - /* - * Search for a command. This is called before we fork so that the - * location of the command will be available in the parent as well as - * the child. The check for "goodname" is an overly conservative - * check that the name will not be subject to expansion. - */ - - struct cmdentry entry; - union node *lpn = lp->n; - - if (lpn->type == NCMD && lpn->ncmd.args - && goodname(lpn->ncmd.args->narg.text)) - find_command(lpn->ncmd.args->narg.text, &entry, 0, pathval()); - + prehash(lp->n); pip[1] = -1; if (lp->next) { if (pipe(pip) < 0) { @@ -2353,40 +2331,33 @@ static inline void evalpipe(union node *n) } if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) { INTON; + if (pip[1] >= 0) { + close(pip[0]); + } if (prevfd > 0) { - close(0); - dup_as_newfd(prevfd, 0); + dup2(prevfd, 0); close(prevfd); - if (pip[0] == 0) { - pip[0] = -1; - } } - if (pip[1] >= 0) { - if (pip[0] >= 0) { - close(pip[0]); - } - if (pip[1] != 1) { - close(1); - dup_as_newfd(pip[1], 1); - close(pip[1]); - } + if (pip[1] > 1) { + dup2(pip[1], 1); + close(pip[1]); } - evaltree(lp->n, EV_EXIT); + evaltree(lp->n, flags); } if (prevfd >= 0) close(prevfd); prevfd = pip[0]; close(pip[1]); } - INTON; if (n->npipe.backgnd == 0) { - INTOFF; exitstatus = waitforjob(jp); TRACE(("evalpipe: job done exit status %d\n", exitstatus)); - INTON; } + INTON; } +static void find_command(const char *, struct cmdentry *, int, const char *); + static int isassignment(const char *word) { if (!is_name(*word)) { @@ -2418,7 +2389,7 @@ static void evalcommand(union node *cmd, int flags) volatile int e; char *lastarg; const char *path; - const struct builtincmd *firstbltin; + int spclbltin; struct jmploc *volatile savehandler; struct jmploc jmploc; @@ -2428,6 +2399,7 @@ static void evalcommand(union node *cmd, int flags) (void) &argc; (void) &lastarg; (void) &flags; + (void) &spclbltin; #endif /* First expand the arguments. */ @@ -2442,23 +2414,9 @@ static void evalcommand(union node *cmd, int flags) for (argp = cmd->ncmd.assign; argp; argp = argp->narg.next) { expandarg(argp, &varlist, EXP_VARTILDE); } - for (argp = cmd->ncmd.args; argp && !arglist.list; argp = argp->narg.next) { + for (argp = cmd->ncmd.args; argp; argp = argp->narg.next) { expandarg(argp, &arglist, EXP_FULL | EXP_TILDE); } - if (argp) { - struct builtincmd *bcmd; - int pseudovarflag; - - bcmd = find_builtin(arglist.list->text); - pseudovarflag = bcmd && IS_BUILTIN_ASSIGN(bcmd); - for (; argp; argp = argp->narg.next) { - if (pseudovarflag && isassignment(argp->narg.text)) { - expandarg(argp, &arglist, EXP_VARTILDE); - continue; - } - expandarg(argp, &arglist, EXP_FULL | EXP_TILDE); - } - } *arglist.lastp = NULL; *varlist.lastp = NULL; expredir(cmd->ncmd.redirect); @@ -2488,7 +2446,8 @@ static void evalcommand(union node *cmd, int flags) /* Now locate the command. */ if (argc == 0) { cmdentry.cmdtype = CMDBUILTIN; - firstbltin = cmdentry.u.cmd = BLTINCMD; + cmdentry.u.cmd = BLTINCMD; + spclbltin = 1; } else { const char *oldpath; int findflag = DO_ERR; @@ -2505,7 +2464,7 @@ static void evalcommand(union node *cmd, int flags) } oldpath = path; oldfindflag = findflag; - firstbltin = 0; + spclbltin = -1; for (;;) { find_command(argv[0], &cmdentry, findflag, path); if (cmdentry.cmdtype == CMDUNKNOWN) { /* command not found */ @@ -2516,8 +2475,8 @@ static void evalcommand(union node *cmd, int flags) if (cmdentry.cmdtype != CMDBUILTIN) { break; } - if (!firstbltin) { - firstbltin = cmdentry.u.cmd; + if (spclbltin < 0) { + spclbltin = !!(IS_BUILTIN_SPECIAL(cmdentry.u.cmd)) * 2; } if (cmdentry.u.cmd == BLTINCMD) { for (;;) { @@ -2567,13 +2526,17 @@ static void evalcommand(union node *cmd, int flags) /* Fork off a child process if necessary. */ if (cmd->ncmd.backgnd - || (cmdentry.cmdtype == CMDNORMAL && (flags & EV_EXIT) == 0) + || (cmdentry.cmdtype == CMDNORMAL && (!(flags & EV_EXIT) || trap[0])) ) { + INTOFF; jp = makejob(cmd, 1); mode = cmd->ncmd.backgnd; if (forkshell(jp, cmd, mode) != 0) goto parent; /* at end of routine */ + FORCEINTON; flags |= EV_EXIT; + } else { + flags &= ~EV_EXIT; } /* This is the child process if a fork occurred. */ @@ -2584,7 +2547,6 @@ static void evalcommand(union node *cmd, int flags) trargs(argv); #endif exitstatus = oexitstatus; - redirect(cmd->ncmd.redirect, REDIR_PUSH); saveparam = shellparam; shellparam.malloc = 0; shellparam.nparam = argc - 1; @@ -2594,15 +2556,14 @@ static void evalcommand(union node *cmd, int flags) localvars = NULL; INTON; if (setjmp(jmploc.loc)) { - if (exception == EXSHELLPROC) { - freeparam((volatile struct shparam *) - &saveparam); - } else { - saveparam.optind = shellparam.optind; - saveparam.optoff = shellparam.optoff; - freeparam(&shellparam); - shellparam = saveparam; + if (exception == EXREDIR) { + exitstatus = 2; + goto funcdone; } + saveparam.optind = shellparam.optind; + saveparam.optoff = shellparam.optoff; + freeparam(&shellparam); + shellparam = saveparam; poplocalvars(); localvars = savelocalvars; handler = savehandler; @@ -2610,11 +2571,12 @@ static void evalcommand(union node *cmd, int flags) } savehandler = handler; handler = &jmploc; - for (sp = varlist.list; sp; sp = sp->next) - mklocal(sp->text); + redirect(cmd->ncmd.redirect, REDIR_PUSH); + listsetvar(varlist.list); funcnest++; evaltree(cmdentry.u.func, flags & EV_TESTED); funcnest--; + funcdone: INTOFF; poplocalvars(); localvars = savelocalvars; @@ -2629,17 +2591,16 @@ static void evalcommand(union node *cmd, int flags) evalskip = 0; skipcount = 0; } - if (flags & EV_EXIT) - exitshell(exitstatus); } else if (cmdentry.cmdtype == CMDBUILTIN) { + int redir; + #ifdef DEBUG trputs("builtin command: "); trargs(argv); #endif - mode = (cmdentry.u.cmd == EXECCMD) ? 0 : REDIR_PUSH; - redirect(cmd->ncmd.redirect, mode); + redir = (cmdentry.u.cmd == EXECCMD) ? 0 : REDIR_PUSH; savecmdname = commandname; - if (IS_BUILTIN_SPECIAL(firstbltin)) { + if (spclbltin) { listsetvar(varlist.list); } else { cmdenviron = varlist.list; @@ -2652,6 +2613,7 @@ static void evalcommand(union node *cmd, int flags) } savehandler = handler; handler = &jmploc; + redirect(cmd->ncmd.redirect, redir); commandname = argv[0]; argptr = argv + 1; optptr = NULL; /* initialize nextopt */ @@ -2659,18 +2621,13 @@ static void evalcommand(union node *cmd, int flags) flushall(); cmddone: cmdenviron = NULL; - if (e != EXSHELLPROC) { - commandname = savecmdname; - if (flags & EV_EXIT) - exitshell(exitstatus); - } + commandname = savecmdname; handler = savehandler; if (e != -1) { - if ((e != EXERROR && e != EXEXEC) - || cmdentry.u.cmd == BLTINCMD - || cmdentry.u.cmd == DOTCMD - || cmdentry.u.cmd == EVALCMD || cmdentry.u.cmd == EXECCMD) - exraise(e); + if (e == EXINT || spclbltin & 2) { + if (e == EXREDIR) + exraise(e); + } FORCEINTON; } if (cmdentry.u.cmd != EXECCMD) @@ -2687,14 +2644,15 @@ static void evalcommand(union node *cmd, int flags) envp = environment(); shellexec(argv, envp, path, cmdentry.u.index); } + if (flags & EV_EXIT) + exitshell(exitstatus); goto out; parent: /* parent process gets here (if we forked) */ if (mode == 0) { /* argument to fork */ - INTOFF; exitstatus = waitforjob(jp); - INTON; } + INTON; out: if (lastarg) @@ -2790,7 +2748,7 @@ static void evaltree(union node *n, int flags) break; case NPIPE: - evalpipe(n); + evalpipe(n, flags); checkexit = 1; break; case NCMD: @@ -2818,22 +2776,27 @@ static void evaltree(union node *n, int flags) static void evalsubshell(const union node *n, int flags) { - struct job *jp; + struct job *jp = 0; int backgnd = (n->type == NBACKGND); expredir(n->nredir.redirect); + if (!backgnd && flags & EV_EXIT && !trap[0]) + goto nofork; + INTOFF; jp = makejob(n, 1); if (forkshell(jp, n, backgnd) == 0) { + INTON; + flags |= EV_EXIT; if (backgnd) flags &= ~EV_TESTED; + nofork: redirect(n->nredir.redirect, 0); - evaltree(n->nredir.n, flags | EV_EXIT); /* never returns */ + evaltree(n->nredir.n, flags); /* never returns */ } if (!backgnd) { - INTOFF; exitstatus = waitforjob(jp); - INTON; } + INTON; } /* @@ -2923,6 +2886,22 @@ static void evalbackcmd(union node *n, struct backcmd *result) * Execute a simple command. */ +/* + * Search for a command. This is called before we fork so that the + * location of the command will be available in the parent as well as + * the child. The check for "goodname" is an overly conservative + * check that the name will not be subject to expansion. + */ + +static void prehash(union node *n) +{ + struct cmdentry entry; + + if (n->type == NCMD && n->ncmd.args) + if (goodname(n->ncmd.args->narg.text)) + find_command(n->ncmd.args->narg.text, &entry, 0, pathval()); +} + /* * Builtin commands. Builtin commands whose functions are closely @@ -3132,65 +3111,6 @@ static void clear_traps(void) } -static void initshellproc(void) -{ - -#ifdef CONFIG_ASH_ALIAS - /* from alias.c: */ - { - rmaliases(); - } -#endif - /* from eval.c: */ - { - exitstatus = 0; - } - - /* from exec.c: */ - { - deletefuncs(); - } - - /* from jobs.c: */ - { - backgndpid = -1; -#ifdef CONFIG_ASH_JOB_CONTROL - jobctl = 0; -#endif - } - - /* from options.c: */ - { - int i; - - for (i = 0; i < NOPTS; i++) - optent_val(i) = 0; - optschanged(); - - } - - /* from redir.c: */ - { - clearredir(); - } - - /* from trap.c: */ - { - char *sm; - - clear_traps(); - for (sm = sigmode; sm < sigmode + NSIG - 1; sm++) { - if (*sm == S_IGN) - *sm = S_HARD_IGN; - } - } - - /* from var.c: */ - { - shprocvar(); - } -} - static int preadbuffer(void); static void pushfile(void); @@ -3326,7 +3246,7 @@ static void setinputfile(const char *fname, int push) static void tryexec(char *cmd, char **argv, char **envp) { - int e; + int repeated = 0; #ifdef CONFIG_FEATURE_SH_STANDALONE_SHELL char *name = cmd; @@ -3344,17 +3264,21 @@ static void tryexec(char *cmd, char **argv, char **envp) optind = 1; run_applet_by_name(name, argc_l, argv); #endif + repeat: execve(cmd, argv, envp); - e = errno; - if (e == ENOEXEC) { - INTOFF; - initshellproc(); - setinputfile(cmd, 0); - commandname = arg0 = xstrdup(argv[0]); - setparam(argv + 1); - exraise(EXSHELLPROC); + if (repeated++) { + free(argv); + } else if (errno == ENOEXEC) { + char **ap; + char **new; + + for (ap = argv; *ap; ap++); + ap = new = xmalloc((ap - argv + 2) * sizeof(char *)); + *ap++ = cmd = "/bin/sh"; + while ((*ap++ = *argv++)); + argv = new; + goto repeat; } - errno = e; } static char *commandtext(const union node *); @@ -3430,7 +3354,6 @@ static const char *const *findkwd(const char *s) /*** Command hashing code ***/ - static int hashcmd(int argc, char **argv) { struct tblentry **pp; @@ -3766,17 +3689,12 @@ find_command(const char *name, struct cmdentry *entry, int act, * Search the table of builtin commands. */ -static int bstrcmp(const void *name, const void *b) -{ - return strcmp((const char *) name, (*(const char *const *) b) + 1); -} - static struct builtincmd *find_builtin(const char *name) { struct builtincmd *bp; bp = bsearch(name, builtincmds, NUMBUILTINS, sizeof(struct builtincmd), - bstrcmp); + pstrcmp); return bp; } @@ -3786,7 +3704,7 @@ static struct builtincmd *find_builtin(const char *name) * are executed they will be rehashed. */ -static inline void hashcd(void) +static void hashcd(void) { struct tblentry **pp; struct tblentry *cmdp; @@ -3853,34 +3771,6 @@ static void clearcmdentry(int firstchange) /* - * Delete all functions. - */ - -static void deletefuncs(void) -{ - struct tblentry **tblp; - struct tblentry **pp; - struct tblentry *cmdp; - - INTOFF; - for (tblp = cmdtable; tblp < &cmdtable[CMDTABLESIZE]; tblp++) { - pp = tblp; - while ((cmdp = *pp) != NULL) { - if (cmdp->cmdtype == CMDFUNCTION) { - *pp = cmdp->next; - free(cmdp->param.func); - free(cmdp); - } else { - pp = &cmdp->next; - } - } - } - INTON; -} - - - -/* * Locate a command in the command hash table. If "add" is nonzero, * add the command to the table if it is not already present. The * variable "lastcmdentry" is set to point to the address of the link @@ -3926,7 +3816,7 @@ static struct tblentry *cmdlookup(const char *name, int add) * Delete the command entry returned on the last lookup. */ -static void delete_cmd_entry() +static void delete_cmd_entry(void) { struct tblentry *cmdp; @@ -4117,7 +4007,7 @@ static void expbackq(union node *, int, int); static int subevalvar(char *, char *, int, int, int, int, int); static int varisset(char *, int); static void strtodest(const char *, int, int); -static inline void varvalue(char *, int, int); +static void varvalue(char *, int, int); static void recordregion(int, int, int); static void removerecordregions(int); static void ifsbreakup(char *, struct arglist *); @@ -4127,7 +4017,7 @@ static void expandmeta(struct strlist *, int); #if defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN) #define preglob(p) _rmescapes((p), RMESCAPE_ALLOC | RMESCAPE_GLOB) #if !defined(GLOB_BROKEN) -static inline void addglob(const glob_t *); +static void addglob(const glob_t *); #endif #endif #if !(defined(__GLIBC__) && __GLIBC__ >= 2 && !defined(FNMATCH_BROKEN) && !defined(GLOB_BROKEN)) @@ -4431,7 +4321,6 @@ static void argstr(char *p, int flag) STPUTC(c, expdest); } } - return; } static char *exptilde(char *p, int flag) @@ -4573,7 +4462,6 @@ static void expari(int flag) error("syntax error: \"%s\"\n", p + 2); } snprintf(p, 12, "%d", result); - while (*p++); if (quoted == 0) @@ -4857,7 +4745,7 @@ static void strtodest(const char *p, int syntax, int quotes) * Add the value of a specialized variable to the stack string. */ -static inline void varvalue(char *name, int quoted, int flags) +static void varvalue(char *name, int quoted, int flags) { int num; char *p; @@ -5059,9 +4947,10 @@ static void ifsfree(void) static void addfname(const char *name) { struct strlist *sp; + size_t len = strlen(name) + 1; sp = (struct strlist *) stalloc(sizeof *sp); - sp->text = sstrdup(name); + sp->text = memcpy(stalloc(len), name, len); *exparg.lastp = sp; exparg.lastp = &sp->next; } @@ -5113,7 +5002,7 @@ static void expandmeta(struct strlist *str, int flag) * Add the result of glob(3) to the list. */ -static inline void addglob(const glob_t * pglob) +static void addglob(const glob_t * pglob) { char **p = pglob->gl_pathv; @@ -5704,8 +5593,7 @@ static void reset(void) /* from input.c: */ { - if (exception != EXSHELLPROC) - parselleft = parsenleft = 0; /* clear input buffer */ + parselleft = parsenleft = 0; /* clear input buffer */ popallfiles(); } @@ -6014,7 +5902,6 @@ static void restartjob(struct job *); static void freejob(struct job *); static struct job *getjob(const char *); static int dowait(int, struct job *); -static void waitonint(int); /* @@ -6045,20 +5932,12 @@ static void dupredirect(const union node *, int, int fd1dup); static void setjobctl(int enable) { -#ifdef OLD_TTY_DRIVER - int ldisc; -#endif - if (enable == jobctl || rootshell == 0) return; if (enable) { do { /* while we are in the background */ -#ifdef OLD_TTY_DRIVER - if (ioctl(2, TIOCGPGRP, (char *) &initialpgrp) < 0) { -#else initialpgrp = tcgetpgrp(2); if (initialpgrp < 0) { -#endif out2str("sh: can't access tty; job control turned off\n"); mflag = 0; return; @@ -6070,30 +5949,14 @@ static void setjobctl(int enable) continue; } } while (0); -#ifdef OLD_TTY_DRIVER - if (ioctl(2, TIOCGETD, (char *) &ldisc) < 0 || ldisc != NTTYDISC) { - out2str - ("sh: need new tty driver to run job control; job control turned off\n"); - mflag = 0; - return; - } -#endif setsignal(SIGTSTP); setsignal(SIGTTOU); setsignal(SIGTTIN); setpgid(0, rootpid); -#ifdef OLD_TTY_DRIVER - ioctl(2, TIOCSPGRP, (char *) &rootpid); -#else tcsetpgrp(2, rootpid); -#endif } else { /* turning job control off */ setpgid(0, initialpgrp); -#ifdef OLD_TTY_DRIVER - ioctl(2, TIOCSPGRP, (char *) &initialpgrp); -#else tcsetpgrp(2, initialpgrp); -#endif setsignal(SIGTSTP); setsignal(SIGTTOU); setsignal(SIGTTIN); @@ -6196,11 +6059,7 @@ static int fgcmd(int argc, char **argv) if (jp->jobctl == 0) error("job not created under job control"); pgrp = jp->ps[0].pid; -#ifdef OLD_TTY_DRIVER ioctl(2, TIOCSPGRP, (char *) &pgrp); -#else - tcsetpgrp(2, pgrp); -#endif restartjob(jp); status = waitforjob(jp); return status; @@ -6566,13 +6425,8 @@ static int forkshell(struct job *jp, const union node *n, int mode) setpgid(0, pgrp); if (mode == FORK_FG) { /*** this causes superfluous TIOCSPGRPS ***/ -#ifdef OLD_TTY_DRIVER - if (ioctl(2, TIOCSPGRP, (char *) &pgrp) < 0) - error("TIOCSPGRP failed, errno=%d", errno); -#else if (tcsetpgrp(2, pgrp) < 0) error("tcsetpgrp failed, errno=%d", errno); -#endif } setsignal(SIGTSTP); setsignal(SIGTTOU); @@ -6651,43 +6505,18 @@ static int waitforjob(struct job *jp) #endif int status; int st; - struct sigaction act, oact; INTOFF; - intreceived = 0; -#ifdef CONFIG_ASH_JOB_CONTROL - if (!jobctl) { -#else - if (!iflag) { -#endif - sigaction(SIGINT, 0, &act); - act.sa_handler = waitonint; - sigaction(SIGINT, &act, &oact); - } TRACE(("waitforjob(%%%d) called\n", jp - jobtab + 1)); while (jp->state == 0) { dowait(1, jp); } #ifdef CONFIG_ASH_JOB_CONTROL - if (!jobctl) { -#else - if (!iflag) { -#endif - sigaction(SIGINT, &oact, 0); - if (intreceived) - kill(getpid(), SIGINT); - } -#ifdef CONFIG_ASH_JOB_CONTROL if (jp->jobctl) { -#ifdef OLD_TTY_DRIVER - if (ioctl(2, TIOCSPGRP, (char *) &mypgrp) < 0) - error("TIOCSPGRP failed, errno=%d\n", errno); -#else if (tcsetpgrp(2, mypgrp) < 0) error("tcsetpgrp failed, errno=%d\n", errno); -#endif } - if (jp->state == CONFIG_ASH_JOB_CONTROLTOPPED) + if (jp->state == JOBSTOPPED) curjob = jp - jobtab + 1; #endif status = jp->ps[jp->nprocs - 1].status; @@ -6804,7 +6633,7 @@ static int dowait(int block, struct job *job) done = 0; } if (stopped) { /* stopped or done */ - int state = done ? JOBDONE : CONFIG_ASH_JOB_CONTROLTOPPED; + int state = done ? JOBDONE : JOBSTOPPED; if (jp->state != state) { TRACE(("Job %d: changing state from %d to %d\n", @@ -6873,7 +6702,7 @@ static int stoppedjobs(void) for (jobno = 1, jp = jobtab; jobno <= njobs; jobno++, jp++) { if (jp->used == 0) continue; - if (jp->state == CONFIG_ASH_JOB_CONTROLTOPPED) { + if (jp->state == JOBSTOPPED) { out2str("You have stopped jobs.\n"); job_warning = 2; return (1); @@ -7301,11 +7130,6 @@ static char *commandtext(const union node *n) } -static void waitonint(int sig) -{ - intreceived = 1; -} - #ifdef CONFIG_ASH_MAIL /* @@ -7493,7 +7317,7 @@ int ash_main(int argc, char **argv) SIGPIPE }; -#define SIGSSIZE ((sizeof(sigs)/sizeof(sigs[0])) - 1) /* trailing nul */ +#define SIGSSIZE ((sizeof(sigs)/sizeof(sigs[0]))) int i; for (i = 0; i < SIGSSIZE; i++) @@ -8343,25 +8167,13 @@ static char *single_quote(const char *s) } /* - * Like strdup but works with the ash stack. - */ - -static char *sstrdup(const char *p) -{ - size_t len = strlen(p) + 1; - - return memcpy(stalloc(len), p, len); -} - - -/* * Routine for dealing with parsed shell commands. */ static void sizenodelist(const struct nodelist *); static struct nodelist *copynodelist(const struct nodelist *); -static char *nodexstrdup(const char *); +static char *nodesavestr(const char *); #define CALCSIZE_TABLE #define COPYNODE_TABLE @@ -8502,7 +8314,7 @@ static union node *copynode(const union node *n) if (!(*p & NODE_MBRMASK)) { /* standard node */ *((union node **) nn) = copynode(*((const union node **) no)); } else if ((*p & NODE_MBRMASK) == NODE_CHARPTR) { /* string */ - *((const char **) nn) = nodexstrdup(*((const char **) no)); + *((const char **) nn) = nodesavestr(*((const char **) no)); } else if (*p & NODE_NODELIST) { /* nodelist */ *((struct nodelist **) nn) = copynodelist(*((const struct nodelist **) no)); @@ -8552,7 +8364,7 @@ static union node *copynode(const union node *n) new->nif.test = copynode(n->nif.test); break; case NFOR: - new->nfor.var = nodexstrdup(n->nfor.var); + new->nfor.var = nodesavestr(n->nfor.var); new->nfor.body = copynode(n->nfor.body); new->nfor.args = copynode(n->nfor.args); break; @@ -8568,7 +8380,7 @@ static union node *copynode(const union node *n) case NDEFUN: case NARG: new->narg.backquote = copynodelist(n->narg.backquote); - new->narg.text = nodexstrdup(n->narg.text); + new->narg.text = nodesavestr(n->narg.text); new->narg.next = copynode(n->narg.next); break; case NTO: @@ -8731,7 +8543,7 @@ static struct nodelist *copynodelist(const struct nodelist *lp) } -static char *nodexstrdup(const char *s) +static char *nodesavestr(const char *s) { const char *p = s; char *q = funcstring; @@ -8866,7 +8678,7 @@ static void options(int cmdline) minus_o(*argptr, val); if (*argptr) argptr++; - } else if (cmdline && (c == '-')) { /* long options */ + } else if (cmdline && (c == '-')) { // long options if (strcmp(p, "login") == 0) isloginsh = 1; break; @@ -11013,12 +10825,14 @@ static void redirect(union node *redir, int flags) { union node *n; struct redirtab *sv = NULL; - int i = EMPTY; + int i; int fd; int newfd; int try; int fd1dup = flags & REDIR_BACKQ;; /* stdout `cmd` redir to pipe */ + TRACE(("redirect(%s) called\n", + flags & REDIR_PUSH ? "REDIR_PUSH" : "NO_REDIR_PUSH")); if (flags & REDIR_PUSH) { sv = xmalloc(sizeof(struct redirtab)); for (i = 0; i < 10; i++) @@ -11167,6 +10981,7 @@ static int dup_as_newfd(int from, int to) /* * Debugging stuff. */ + static void shtree(union node *, int, char *, FILE *); static void shcmd(union node *, FILE *); static void sharg(union node *, FILE *); @@ -11174,13 +10989,13 @@ static void indent(int, char *, FILE *); static void trstring(char *); -static void showtree(n) - unode *n; +#if 0 +static void showtree(node * n) { trputs("showtree called\n"); shtree(n, 1, NULL, stdout); } - +#endif static void shtree(union node *n, int ind, char *pfx, FILE * fp) { @@ -11231,7 +11046,6 @@ static void shtree(union node *n, int ind, char *pfx, FILE * fp) } - static void shcmd(union node *cmd, FILE * fp) { union node *np; @@ -11306,6 +11120,7 @@ static void shcmd(union node *cmd, FILE * fp) } } + static void sharg(union node *arg, FILE * fp) { char *p; @@ -11401,7 +11216,6 @@ static void indent(int amount, char *pfx, FILE * fp) } } - FILE *tracefile; #if DEBUG == 2 @@ -11610,10 +11424,6 @@ static int trapcmd(int argc, char **argv) } - - - - /* * Set the signal handler for the specified signal. The routine figures * out what it should be set to. @@ -11819,7 +11629,7 @@ static void initvar() * PS1 depends on uid */ if ((vps1.flags & VEXPORT) == 0) { - vpp = hashvar("PS1=$"); + vpp = hashvar("PS1=$ "); vps1.next = *vpp; *vpp = &vps1; vps1.text = xstrdup(geteuid()? "PS1=$ " : "PS1=# "); @@ -12013,39 +11823,6 @@ static char **environment() /* - * Called when a shell procedure is invoked to clear out nonexported - * variables. It is also necessary to reallocate variables of with - * VSTACK set since these are currently allocated on the stack. - */ - -static void shprocvar(void) -{ - struct var **vpp; - struct var *vp, **prev; - - for (vpp = vartab; vpp < vartab + VTABSIZE; vpp++) { - for (prev = vpp; (vp = *prev) != NULL;) { - if ((vp->flags & VEXPORT) == 0) { - *prev = vp->next; - if ((vp->flags & VTEXTFIXED) == 0) - free(vp->text); - if ((vp->flags & VSTRFIXED) == 0) - free(vp); - } else { - if (vp->flags & VSTACK) { - vp->text = xstrdup(vp->text); - vp->flags &= ~VSTACK; - } - prev = &vp->next; - } - } - } - initvar(); -} - - - -/* * Command to list all variables which are set. Currently this command * is invoked from the set command when the set command is called without * any variables. @@ -12335,7 +12112,6 @@ static struct var **findvar(struct var **vpp, const char *name) /* * Copyright (c) 1999 Herbert Xu <herbert@debian.org> * This file contains code for the times builtin. - * $Id: ash.c,v 1.57 2002/08/22 18:30:15 bug1 Exp $ */ static int timescmd(int argc, char **argv) { |