11556Srgrimes/*- 21556Srgrimes * Copyright (c) 1991, 1993 31556Srgrimes * The Regents of the University of California. All rights reserved. 41556Srgrimes * 51556Srgrimes * This code is derived from software contributed to Berkeley by 61556Srgrimes * Kenneth Almquist. 71556Srgrimes * 81556Srgrimes * Redistribution and use in source and binary forms, with or without 91556Srgrimes * modification, are permitted provided that the following conditions 101556Srgrimes * are met: 111556Srgrimes * 1. Redistributions of source code must retain the above copyright 121556Srgrimes * notice, this list of conditions and the following disclaimer. 131556Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141556Srgrimes * notice, this list of conditions and the following disclaimer in the 151556Srgrimes * documentation and/or other materials provided with the distribution. 161556Srgrimes * 4. Neither the name of the University nor the names of its contributors 171556Srgrimes * may be used to endorse or promote products derived from this software 181556Srgrimes * without specific prior written permission. 191556Srgrimes * 201556Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211556Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221556Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231556Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241556Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251556Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261556Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271556Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281556Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291556Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301556Srgrimes * SUCH DAMAGE. 311556Srgrimes */ 321556Srgrimes 331556Srgrimes#ifndef lint 3420425Sstevestatic char const copyright[] = 351556Srgrimes"@(#) Copyright (c) 1991, 1993\n\ 361556Srgrimes The Regents of the University of California. All rights reserved.\n"; 371556Srgrimes#endif /* not lint */ 381556Srgrimes 391556Srgrimes#ifndef lint 4036150Scharnier#if 0 4136150Scharnierstatic char sccsid[] = "@(#)main.c 8.6 (Berkeley) 5/28/95"; 4236150Scharnier#endif 431556Srgrimes#endif /* not lint */ 4499110Sobrien#include <sys/cdefs.h> 4599110Sobrien__FBSDID("$FreeBSD$"); 461556Srgrimes 4717987Speter#include <stdio.h> 481556Srgrimes#include <signal.h> 4917987Speter#include <sys/stat.h> 5017987Speter#include <unistd.h> 511556Srgrimes#include <fcntl.h> 5217525Sache#include <locale.h> 5359214Simp#include <errno.h> 5417525Sache 551556Srgrimes#include "shell.h" 561556Srgrimes#include "main.h" 571556Srgrimes#include "mail.h" 581556Srgrimes#include "options.h" 591556Srgrimes#include "output.h" 601556Srgrimes#include "parser.h" 611556Srgrimes#include "nodes.h" 6217987Speter#include "expand.h" 631556Srgrimes#include "eval.h" 641556Srgrimes#include "jobs.h" 651556Srgrimes#include "input.h" 661556Srgrimes#include "trap.h" 671556Srgrimes#include "var.h" 6817987Speter#include "show.h" 691556Srgrimes#include "memalloc.h" 701556Srgrimes#include "error.h" 711556Srgrimes#include "init.h" 721556Srgrimes#include "mystring.h" 7317987Speter#include "exec.h" 7420425Ssteve#include "cd.h" 75223060Sjilles#include "builtins.h" 761556Srgrimes 771556Srgrimesint rootpid; 781556Srgrimesint rootshell; 79200998Sjillesstruct jmploc main_handler; 80221669Sjillesint localeisutf8, initial_localeisutf8; 811556Srgrimes 82231790Sjillesstatic void cmdloop(int); 83222957Sjillesstatic void read_profile(char *); 84213811Sobrienstatic char *find_dot_file(char *); 851556Srgrimes 861556Srgrimes/* 871556Srgrimes * Main routine. We initialize things, parse the arguments, execute 881556Srgrimes * profiles if we're a login shell, and then call cmdloop to execute 891556Srgrimes * commands. The setjmp call sets up the location to jump to when an 901556Srgrimes * exception occurs. When an exception occurs the variable "state" 911556Srgrimes * is used to figure out how far we had gotten. 921556Srgrimes */ 931556Srgrimes 9417987Speterint 9590111Simpmain(int argc, char *argv[]) 9617987Speter{ 97222957Sjilles struct stackmark smark, smark2; 981556Srgrimes volatile int state; 991556Srgrimes char *shinit; 1001556Srgrimes 10117525Sache (void) setlocale(LC_ALL, ""); 102221669Sjilles initcharset(); 1031556Srgrimes state = 0; 104200998Sjilles if (setjmp(main_handler.loc)) { 10520425Ssteve switch (exception) { 10620425Ssteve case EXEXEC: 10720425Ssteve exitstatus = exerrno; 10820425Ssteve break; 10920425Ssteve 11020425Ssteve case EXERROR: 11120425Ssteve exitstatus = 2; 11220425Ssteve break; 11320425Ssteve 11420425Ssteve default: 11520425Ssteve break; 11620425Ssteve } 11720425Ssteve 118220978Sjilles if (state == 0 || iflag == 0 || ! rootshell || 119220978Sjilles exception == EXEXIT) 120218306Sjilles exitshell(exitstatus); 1211556Srgrimes reset(); 122215567Sjilles if (exception == EXINT) 123215567Sjilles out2fmt_flush("\n"); 1241556Srgrimes popstackmark(&smark); 1251556Srgrimes FORCEINTON; /* enable interrupts */ 1261556Srgrimes if (state == 1) 1271556Srgrimes goto state1; 1281556Srgrimes else if (state == 2) 1291556Srgrimes goto state2; 1301556Srgrimes else if (state == 3) 1311556Srgrimes goto state3; 1321556Srgrimes else 1331556Srgrimes goto state4; 1341556Srgrimes } 135200998Sjilles handler = &main_handler; 1361556Srgrimes#ifdef DEBUG 1371556Srgrimes opentrace(); 1381556Srgrimes trputs("Shell args: "); trargs(argv); 1391556Srgrimes#endif 1401556Srgrimes rootpid = getpid(); 1411556Srgrimes rootshell = 1; 1421556Srgrimes init(); 1431556Srgrimes setstackmark(&smark); 144222957Sjilles setstackmark(&smark2); 1451556Srgrimes procargs(argc, argv); 146206759Sjilles pwd_init(iflag); 147203576Sjilles if (iflag) 148203576Sjilles chkmail(1); 1491556Srgrimes if (argv[0] && argv[0][0] == '-') { 1501556Srgrimes state = 1; 1511556Srgrimes read_profile("/etc/profile"); 1521556Srgrimesstate1: 1531556Srgrimes state = 2; 15419240Ssteve if (privileged == 0) 155223005Sjilles read_profile("${HOME-}/.profile"); 15619240Ssteve else 15719240Ssteve read_profile("/etc/suid_profile"); 1588855Srgrimes } 1591556Srgrimesstate2: 1601556Srgrimes state = 3; 16125471Ssteve if (!privileged && iflag) { 16217987Speter if ((shinit = lookupvar("ENV")) != NULL && *shinit != '\0') { 16317987Speter state = 3; 16417987Speter read_profile(shinit); 16517987Speter } 1661556Srgrimes } 1671556Srgrimesstate3: 1681556Srgrimes state = 4; 169222957Sjilles popstackmark(&smark2); 1701556Srgrimes if (minusc) { 171194128Sjilles evalstring(minusc, sflag ? 0 : EV_EXIT); 1721556Srgrimes } 1731556Srgrimes if (sflag || minusc == NULL) { 1741556Srgrimesstate4: /* XXX ??? - why isn't this before the "if" statement */ 1751556Srgrimes cmdloop(1); 1761556Srgrimes } 1771556Srgrimes exitshell(exitstatus); 17817987Speter /*NOTREACHED*/ 17917987Speter return 0; 1801556Srgrimes} 1811556Srgrimes 1821556Srgrimes 1831556Srgrimes/* 1841556Srgrimes * Read and execute commands. "Top" is nonzero for the top level command 1851556Srgrimes * loop; it turns on prompting if the shell is interactive. 1861556Srgrimes */ 1871556Srgrimes 188231790Sjillesstatic void 18990111Simpcmdloop(int top) 19017987Speter{ 1911556Srgrimes union node *n; 1921556Srgrimes struct stackmark smark; 1931556Srgrimes int inter; 1941556Srgrimes int numeof = 0; 1951556Srgrimes 1961556Srgrimes TRACE(("cmdloop(%d) called\n", top)); 1971556Srgrimes setstackmark(&smark); 1981556Srgrimes for (;;) { 1991556Srgrimes if (pendingsigs) 2001556Srgrimes dotrap(); 2011556Srgrimes inter = 0; 2021556Srgrimes if (iflag && top) { 2031556Srgrimes inter++; 204163085Sstefanf showjobs(1, SHOWJOBS_DEFAULT); 2051556Srgrimes chkmail(0); 2061556Srgrimes flushout(&output); 2071556Srgrimes } 2081556Srgrimes n = parsecmd(inter); 2091556Srgrimes /* showtree(n); DEBUG */ 2101556Srgrimes if (n == NEOF) { 2111556Srgrimes if (!top || numeof >= 50) 2121556Srgrimes break; 2131556Srgrimes if (!stoppedjobs()) { 2141556Srgrimes if (!Iflag) 2151556Srgrimes break; 216199629Sjilles out2fmt_flush("\nUse \"exit\" to leave shell.\n"); 2171556Srgrimes } 2181556Srgrimes numeof++; 2191556Srgrimes } else if (n != NULL && nflag == 0) { 2201556Srgrimes job_warning = (job_warning == 2) ? 1 : 0; 2211556Srgrimes numeof = 0; 2221556Srgrimes evaltree(n, 0); 2231556Srgrimes } 2241556Srgrimes popstackmark(&smark); 22564702Scracauer setstackmark(&smark); 226211349Sjilles if (evalskip != 0) { 227211349Sjilles if (evalskip == SKIPFILE) 228211349Sjilles evalskip = 0; 22920425Ssteve break; 23020425Ssteve } 2311556Srgrimes } 23264702Scracauer popstackmark(&smark); 2331556Srgrimes} 2341556Srgrimes 2351556Srgrimes 2361556Srgrimes 2371556Srgrimes/* 2381556Srgrimes * Read /etc/profile or .profile. Return on error. 2391556Srgrimes */ 2401556Srgrimes 241213811Sobrienstatic void 242222957Sjillesread_profile(char *name) 24390111Simp{ 2441556Srgrimes int fd; 245222957Sjilles const char *expandedname; 2461556Srgrimes 247222957Sjilles expandedname = expandstr(name); 248222957Sjilles if (expandedname == NULL) 249222957Sjilles return; 2501556Srgrimes INTOFF; 251222957Sjilles if ((fd = open(expandedname, O_RDONLY)) >= 0) 2521556Srgrimes setinputfd(fd, 1); 2531556Srgrimes INTON; 2541556Srgrimes if (fd < 0) 2551556Srgrimes return; 2561556Srgrimes cmdloop(0); 2571556Srgrimes popfile(); 2581556Srgrimes} 2591556Srgrimes 2601556Srgrimes 2611556Srgrimes 2621556Srgrimes/* 2631556Srgrimes * Read a file containing shell functions. 2641556Srgrimes */ 2651556Srgrimes 2661556Srgrimesvoid 267200956Sjillesreadcmdfile(const char *name) 26817987Speter{ 269241030Sjilles setinputfile(name, 1); 2701556Srgrimes cmdloop(0); 2711556Srgrimes popfile(); 2721556Srgrimes} 2731556Srgrimes 2741556Srgrimes 2751556Srgrimes 2761556Srgrimes/* 27746684Skris * Take commands from a file. To be compatible we should do a path 27817987Speter * search for the file, which is necessary to find sub-commands. 2791556Srgrimes */ 2801556Srgrimes 28117987Speter 282213811Sobrienstatic char * 28390111Simpfind_dot_file(char *basename) 28417987Speter{ 28517987Speter char *fullname; 286200956Sjilles const char *path = pathval(); 28717987Speter struct stat statb; 28817987Speter 28917987Speter /* don't try this for absolute or relative paths */ 29017987Speter if( strchr(basename, '/')) 29117987Speter return basename; 29217987Speter 29317987Speter while ((fullname = padvance(&path, basename)) != NULL) { 294222173Sjilles if ((stat(fullname, &statb) == 0) && S_ISREG(statb.st_mode)) { 295222173Sjilles /* 296222173Sjilles * Don't bother freeing here, since it will 297222173Sjilles * be freed by the caller. 298222173Sjilles */ 299222173Sjilles return fullname; 300222173Sjilles } 30117987Speter stunalloc(fullname); 30217987Speter } 30317987Speter return basename; 30417987Speter} 30517987Speter 30617987Speterint 30790111Simpdotcmd(int argc, char **argv) 30817987Speter{ 309208630Sjilles char *filename, *fullname; 310157414Sstefanf 311157414Sstefanf if (argc < 2) 312157414Sstefanf error("missing filename"); 313157414Sstefanf 3141556Srgrimes exitstatus = 0; 31517987Speter 316208630Sjilles /* 317208630Sjilles * Because we have historically not supported any options, 318208630Sjilles * only treat "--" specially. 319208630Sjilles */ 320208630Sjilles filename = argc > 2 && strcmp(argv[1], "--") == 0 ? argv[2] : argv[1]; 321208630Sjilles 322208630Sjilles fullname = find_dot_file(filename); 323157414Sstefanf setinputfile(fullname, 1); 324157414Sstefanf commandname = fullname; 325157414Sstefanf cmdloop(0); 326157414Sstefanf popfile(); 3271556Srgrimes return exitstatus; 3281556Srgrimes} 3291556Srgrimes 3301556Srgrimes 33117987Speterint 33290111Simpexitcmd(int argc, char **argv) 33317987Speter{ 3341556Srgrimes if (stoppedjobs()) 33517987Speter return 0; 33620425Ssteve if (argc > 1) 337217175Sjilles exitshell(number(argv[1])); 33820425Ssteve else 339217175Sjilles exitshell_savedstatus(); 3401556Srgrimes} 341