FILE *os_path_open(const char *name, const char *mode)
{
FILE *fp;
char buf[FILENAME_MAX + 1];
char *p;
/* Let's see if the file is in the currect directory */
/* or if the user gave us a full path. */
if ((fp = fopen(name, mode))) {
return fp;
}
/* If zcodepath is defined in a config file, check that path. */
/* If we find the file a match in that path, great. */
/* Otherwise, check some environmental variables. */
if (f_setup.zcode_path != NULL) {
if ((fp = pathopen(name, f_setup.zcode_path, mode, buf)) != NULL) {
strncpy(f_setup.story_name, buf, FILENAME_MAX);
return fp;
}
}
if ( (p = getenv(PATH1) ) == NULL)
p = getenv(PATH2);
if (p != NULL) {
fp = pathopen(name, p, mode, buf);
strncpy(f_setup.story_name, buf, FILENAME_MAX);
return fp;
}
return NULL; /* give up */
} /* os_path_open() */
int
main(int c, char *v[], char *e[])
{
int rflag = ttyflg;
int rsflag = 1; /* local restricted flag */
unsigned char *flagc = flagadr;
struct namnod *n;
mypid = getpid();
mypgid = getpgid(mypid);
mysid = getsid(mypid);
/*
* Do locale processing only if /usr is mounted.
*/
localedir_exists = (access(localedir, F_OK) == 0);
/*
* initialize storage allocation
*/
if (stakbot == 0) {
addblok((unsigned)0);
}
/*
* If the first character of the last path element of v[0] is "-"
* (ex. -sh, or /bin/-sh), this is a login shell
*/
if (*simple(v[0]) == '-') {
signal(SIGXCPU, SIG_DFL);
signal(SIGXFSZ, SIG_DFL);
/*
* As the previous comment states, this is a login shell.
* Therefore, we set the login_shell flag to explicitly
* indicate this condition.
*/
login_shell = TRUE;
}
stdsigs();
/*
* set names from userenv
*/
setup_env();
/*
* LC_MESSAGES is set here so that early error messages will
* come out in the right style.
* Note that LC_CTYPE is done later on and is *not*
* taken from the previous environ
*/
/*
* Do locale processing only if /usr is mounted.
*/
if (localedir_exists)
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN) /* Should be defined by cc -D */
#define TEXT_DOMAIN "SYS_TEST" /* Use this only if it weren't */
#endif
(void) textdomain(TEXT_DOMAIN);
/*
* 'rsflag' is zero if SHELL variable is
* set in environment and
* the simple file part of the value.
* is rsh
*/
if (n = findnam("SHELL")) {
if (eq("rsh", simple(n->namval)))
rsflag = 0;
}
/*
* a shell is also restricted if the simple name of argv(0) is
* rsh or -rsh in its simple name
*/
#ifndef RES
if (c > 0 && (eq("rsh", simple(*v)) || eq("-rsh", simple(*v))))
rflag = 0;
#endif
if (eq("jsh", simple(*v)) || eq("-jsh", simple(*v)))
flags |= monitorflg;
hcreate();
set_dotpath();
/*
* look for options
* dolc is $#
*/
dolc = options(c, v);
if (dolc < 2) {
flags |= stdflg;
{
while (*flagc)
flagc++;
*flagc++ = STDFLG;
*flagc = 0;
}
}
if ((flags & stdflg) == 0)
dolc--;
if ((flags & privflg) == 0) {
uid_t euid;
gid_t egid;
uid_t ruid;
gid_t rgid;
/*
* Determine all of the user's id #'s for this process and
* then decide if this shell is being entered as a result
* of a fork/exec.
* If the effective uid/gid do NOT match and the euid/egid
* is < 100 and the egid is NOT 1, reset the uid and gid to
* the user originally calling this process.
*/
euid = geteuid();
ruid = getuid();
egid = getegid();
rgid = getgid();
if ((euid != ruid) && (euid < 100))
setuid(ruid); /* reset the uid to the orig user */
if ((egid != rgid) && ((egid < 100) && (egid != 1)))
setgid(rgid); /* reset the gid to the orig user */
}
dolv = (unsigned char **)v + c - dolc;
dolc--;
/*
* return here for shell file execution
* but not for parenthesis subshells
*/
if (setjmp(subshell)) {
freejobs();
flags |= subsh;
}
/*
* number of positional parameters
*/
replace(&cmdadr, dolv[0]); /* cmdadr is $0 */
/*
* set pidname '$$'
*/
assnum(&pidadr, (long)mypid);
/*
* set up temp file names
*/
settmp();
/*
* default internal field separators
* Do not allow importing of IFS from parent shell.
* setup_env() may have set anything from parent shell to IFS.
* Always set the default ifs to IFS.
*/
assign(&ifsnod, (unsigned char *)sptbnl);
dfault(&mchknod, MAILCHECK);
mailchk = stoi(mchknod.namval);
/* initialize OPTIND for getopt */
n = lookup("OPTIND");
assign(n, (unsigned char *)"1");
/*
* make sure that option parsing starts
* at first character
*/
_sp = 1;
if ((beenhere++) == FALSE) /* ? profile */
{
if ((login_shell == TRUE) && (flags & privflg) == 0) {
/* system profile */
#ifndef RES
if ((input = pathopen(nullstr, sysprofile)) >= 0)
exfile(rflag); /* file exists */
#endif
/* user profile */
if ((input = pathopen(homenod.namval, profile)) >= 0) {
exfile(rflag);
flags &= ~ttyflg;
}
}
if (rsflag == 0 || rflag == 0) {
if ((flags & rshflg) == 0) {
while (*flagc)
flagc++;
*flagc++ = 'r';
*flagc = '\0';
}
flags |= rshflg;
}
/*
* open input file if specified
*/
if (comdiv) {
estabf(comdiv);
input = -1;
}
else
{
if (flags & stdflg) {
input = 0;
} else {
/*
* If the command file specified by 'cmdadr'
* doesn't exist, chkopen() will fail calling
* exitsh(). If this is a login shell and
* the $HOME/.profile file does not exist, the
* above statement "flags &= ~ttyflg" does not
* get executed and this makes exitsh() call
* longjmp() instead of exiting. longjmp() will
* return to the location specified by the last
* active jmpbuffer, which is the one set up in
* the function exfile() called after the system
* profile file is executed (see lines above).
* This would cause an infinite loop, because
* chkopen() will continue to fail and exitsh()
* to call longjmp(). To make exitsh() exit instead
* of calling longjmp(), we then set the flag forcexit
* at this stage.
*/
flags |= forcexit;
input = chkopen(cmdadr, 0);
flags &= ~forcexit;
}
#ifdef ACCT
if (input != 0)
preacct(cmdadr);
#endif
comdiv--;
}
}
#ifdef pdp11
else
*execargs = (char *)dolv; /* for `ps' cmd */
#endif
exfile(0);
done(0);
}
int
ast_openat(int cwd, const char* path, int flags, ...)
{
int r;
#if _ast_O_LOCAL && O_CLOEXEC >= _ast_O_LOCAL
int o_cloexec;
#endif
#if _ast_O_LOCAL && O_DIRECTORY >= _ast_O_LOCAL
int o_directory;
#endif
mode_t mode;
va_list ap;
va_start(ap, flags);
mode = (flags & O_CREAT) ? (mode_t)va_arg(ap, int) : (mode_t)0;
va_end(ap);
#if _ast_O_LOCAL && O_CLOEXEC >= _ast_O_LOCAL
if (flags & O_CLOEXEC)
{
flags &= ~O_CLOEXEC;
o_cloexec = 1;
}
else
o_cloexec = 0;
#endif
#if _ast_O_LOCAL && O_DIRECTORY >= _ast_O_LOCAL
if (flags & O_DIRECTORY)
{
flags &= ~O_DIRECTORY;
o_directory = 1;
}
else
o_directory = 0;
#endif
if (!path)
path = dot;
if (flags & O_INTERCEPT)
{
flags &= ~O_INTERCEPT;
RESTART(r, openat(cwd, path, flags&~O_INTERCEPT, mode));
#ifdef O_ASYNC
if (r >= 0 && (flags & O_ASYNC))
{
int x;
int f;
RESTART(f, fcntl(r, F_GETFL, 0));
if (f >= 0 && !(f & O_ASYNC))
{
f |= O_ASYNC;
RESTART(x, fcntl(r, F_SETFL, f));
}
#ifdef F_SETOWN
RESTART(x, fcntl(r, F_SETOWN, getuid()));
#endif
}
#endif
}
else
RESTART(r, pathopen(cwd, path, NiL, 0, 0, flags|O_INTERCEPT, mode));
#if _ast_O_LOCAL && O_CLOEXEC >= _ast_O_LOCAL
if (o_cloexec && r >= 0)
RESTART(o_cloexec, fcntl(r, F_SETFD, FD_CLOEXEC));
#endif
#if _ast_O_LOCAL && O_DIRECTORY >= _ast_O_LOCAL
if (o_directory && r >= 0)
{
struct stat st;
if (fstat(r, &st) || !S_ISDIR(st.st_mode) && (errno = ENOTDIR))
{
close(r);
r = -1;
}
}
#endif
return r;
}
int execute(TREPTR argt, int execflg, int *pf1, int *pf2)
{
/* `stakbot' is preserved by this routine */
register TREPTR t;
STKPTR sav = savstak();
sigchk();
if ((t = argt) && execbrk == 0) {
register int treeflgs;
int oldexit, type;
register char **com;
treeflgs = t->tretyp;
type = treeflgs & COMMSK;
oldexit = exitval;
exitval = 0;
switch (type) {
case TCOM:
{
STRING a1;
int argn, internal;
ARGPTR schain = gchain;
IOPTR io = t->treio;
gchain = 0;
argn = getarg((void *)t);/*FIXME*/
com = scan(argn);
a1 = com[1];
gchain = schain;
if ((internal = syslook(com[0], commands)) || argn == 0)
setlist(((COMPTR) t)->comset, 0);
if (argn && (flags & noexec) == 0) { /* print command if execpr */
if (flags & execpr) {
argn = 0;
prs(execpmsg);
while (com[argn] != ENDARGS) {
prs(com[argn++]);
blank();
}
newline();
}
switch (internal) {
case SYSDOT:
if (a1) {
register int f;
if ((f = pathopen(getpath(a1), a1)) < 0)
failed(a1, notfound);
else
execexp(0, f);
}
break;
case SYSTIMES:
{
struct tms t;
times(&t);
prt(t.tms_cutime);
blank();
prt(t.tms_cstime);
newline();
}
break;
case SYSEXIT:
exitsh(a1 ? stoi(a1) : oldexit);
case SYSNULL:
io = 0;
break;
case SYSCONT:
execbrk = -loopcnt;
break;
case SYSBREAK:
if ((execbrk = loopcnt) && a1)
breakcnt = stoi(a1);
break;
case SYSTRAP:
if (a1) {
BOOL clear;
if ((clear = digit(*a1)) == 0)
++com;
while (*++com) {
int i;
if ((i = stoi(*com)) >= MAXTRAP || i < MINTRAP)
failed(*com, badtrap);
else if (clear)
clrsig(i);
else {
replace(&trapcom[i], a1);
if (*a1)
getsig(i);
else
ignsig(i);
}
}
} else { /* print out current traps */
int i;
for (i = 0; i < MAXTRAP; i++) {
if (trapcom[i]) {
prn(i);
prs(colon);
prs(trapcom[i]);
newline();
}
}
}
break;
case SYSEXEC:
com++;
initio(io);
ioset = 0;
io = 0;
if (a1 == 0)
break;
case SYSLOGIN:
flags |= forked;
oldsigs();
execa((const char **)com);
done();
case SYSCD:
if (flags & rshflg)
failed(com[0], restricted);
else if ((a1 == 0 && (a1 = (char *)homenod.namval) == 0) || chdir(a1) < 0) /* FIXME */
failed(a1, baddir);
break;
case SYSSHFT:
if (dolc < 1)
error(badshift);
else {
dolv++;
dolc--;
}
assnum(&dolladr, dolc);
break;
case SYSWAIT:
await(-1);
break;
case SYSREAD:
exitval = readvar(&com[1]);
break;
/*
case SYSTST:
exitval=testcmd(com);
break;
*/
case SYSSET:
if (a1) {
int argc;
argc = options(argn, (const char **)com);
if (argc > 1)
setargs((const char **)com + argn - argc);
} else if (((COMPTR) t)->comset == 0)
/* Scan name chain and print */
namscan(printnam);
break;
case SYSRDONLY:
exitval = N_RDONLY;
case SYSXPORT:
if (exitval == 0)
exitval = N_EXPORT;;
if (a1) {
while (*++com)
attrib(lookup(*com), exitval);
} else {
namscan(printflg);
}
exitval = 0;
break;
case SYSEVAL:
if (a1)
execexp(a1, (UFD)&com[2]); /* FIXME */
break;
case SYSUMASK:
if (a1) {
int c, i;
i = 0;
while ((c = *a1++) >= '0' && c <= '7')
i = (i << 3) + c - '0';
umask(i);
} else {
int i, j;
umask(i = umask(0));
prc('0');
for (j = 6; j >= 0; j -= 3)
prc(((i >> j) & 07) + '0');
newline();
}
break;
default:
internal = builtin(argn, com);
}
if (internal) {
if (io)
error(illegal);
chktrap();
break;
}
} else if (t->treio == 0)
break;
}
case TFORK:
if (execflg && (treeflgs & (FAMP | FPOU)) == 0)
parent = 0;
else {
while ((parent = fork()) == -1) {
sigchk();
alarm(10);
pause();
}
}
if (parent) { /* This is the parent branch of fork; */
/* it may or may not wait for the child. */
if (treeflgs & FPRS && flags & ttyflg) {
prn(parent);
newline();
}
if (treeflgs & FPCL)
closepipe(pf1);
if ((treeflgs & (FAMP | FPOU)) == 0)
await(parent);
else if ((treeflgs & FAMP) == 0)
post(parent);
else
assnum(&pcsadr, parent);
chktrap();
break;
} else { /* this is the forked branch (child) of execute */
flags |= forked;
iotemp = 0;
postclr();
settmp();
/* Turn off INTR and QUIT if `FINT' */
/* Reset ramaining signals to parent */
/* except for those `lost' by trap */
oldsigs();
if (treeflgs & FINT) {
signal(INTR, SIG_IGN);
signal(QUIT, SIG_IGN);
}
/* pipe in or out */
if (treeflgs & FPIN) {
sh_rename(pf1[INPIPE], 0);
close(pf1[OTPIPE]);
}
if (treeflgs & FPOU) {
sh_rename(pf2[OTPIPE], 1);
close(pf2[INPIPE]);
}
/* default std input for & */
if (treeflgs & FINT && ioset == 0)
sh_rename(chkopen(devnull), 0);
/* io redirection */
initio(t->treio);
if (type != TCOM)
execute(((FORKPTR) t)->forktre, 1, NULL, NULL);
else if (com[0] != ENDARGS) {
setlist(((COMPTR) t)->comset, N_EXPORT);
execa((const char **)com);
}
done();
}
case TPAR:
sh_rename(dup(2), output);
execute(((PARPTR) t)->partre, execflg, NULL, NULL);
done();
case TFIL:
{
int pv[2];
chkpipe(pv);
if (execute(((LSTPTR) t)->lstlef, 0, pf1, pv) == 0)
execute(((LSTPTR) t)->lstrit, execflg, pv, pf2);
else
closepipe(pv);
break;
}
case TLST:
execute(((LSTPTR) t)->lstlef, 0, NULL, NULL);
execute(((LSTPTR) t)->lstrit, execflg, NULL, NULL);
break;
case TAND:
if (execute(((LSTPTR) t)->lstlef, 0, NULL, NULL) == 0)
execute(((LSTPTR) t)->lstrit, execflg, NULL, NULL);
break;
case TORF:
if (execute(((LSTPTR) t)->lstlef, 0, NULL, NULL) != 0)
execute(((LSTPTR) t)->lstrit, execflg, NULL, NULL);
break;
case TFOR:
{
NAMPTR n = lookup(((FORPTR) t)->fornam);
char **args;
DOLPTR argsav = 0;
if (((FORPTR) t)->forlst == 0) {
args = (char **)dolv + 1;
argsav = useargs();
} else {
ARGPTR schain = gchain;
gchain = 0;
trim((args = scan(getarg(((FORPTR) t)->forlst)))[0]);
gchain = schain;
}
loopcnt++;
while (*args != ENDARGS && execbrk == 0) {
assign(n, *args++);
execute(((FORPTR) t)->fortre, 0, NULL, NULL);
if (execbrk < 0) {
execbrk = 0;
}
}
if (breakcnt)
breakcnt--;
execbrk = breakcnt;
loopcnt--;
argfor = freeargs(argsav);
break;
}
case TWH:
case TUN:
{
int i = 0;
loopcnt++;
while (execbrk == 0 && (execute(((WHPTR) t)->whtre, 0, NULL, NULL) == 0) == (type == TWH)) {
i = execute(((WHPTR) t)->dotre, 0, NULL, NULL);
if (execbrk < 0)
execbrk = 0;
}
if (breakcnt)
breakcnt--;
execbrk = breakcnt;
loopcnt--;
exitval = i;
break;
}
case TIF:
if (execute(((IFPTR) t)->iftre, 0, NULL, NULL) == 0)
execute(((IFPTR) t)->thtre, execflg, NULL, NULL);
else
execute(((IFPTR) t)->eltre, execflg, NULL, NULL);
break;
case TSW:
{
register char *r = mactrim(((SWPTR) t)->swarg);
t = (TREPTR) ((SWPTR) t)->swlst;
while (t) {
ARGPTR rex = ((REGPTR) t)->regptr;
while (rex) {
register char *s;
if (gmatch(r, s = macro(rex->argval)) || (trim(s), eq(r, s))) {
execute(((REGPTR)t)->regcom, 0, NULL, NULL);
t = 0;
break;
} else
rex = ((ARGPTR)rex)->argnxt;
}
if (t)
t = (TREPTR) ((REGPTR) t)->regnxt;
}
}
break;
}
exitset();
}
int main(int c, const char *v[])
{
register int rflag = ttyflg;
/* initialise storage allocation */
blokinit();
stdsigs();
setbrk(BRKINCR);
addblok((POS) 0);
/* set names from userenv */
sh_getenv();
/* look for restricted */
/* if(c>0 && any('r', *v) ) { rflag=0 ;} */
/* look for options */
dolc = options(c, v);
if (dolc < 2)
flags |= stdflg;
if ((flags & stdflg) == 0)
dolc--;
dolv = v + c - dolc;
dolc--;
/* return here for shell file execution */
setjmp(subshell);
/* number of positional parameters */
assnum(&dolladr, dolc);
cmdadr = (char *)dolv[0];
/* set pidname */
assnum(&pidadr, getpid());
/* set up temp file names */
settmp();
/* default ifs */
dfault(&ifsnod, sptbnl);
if ((beenhere++) == FALSE) { /* ? profile */
if (*cmdadr == '-'
&& (input = pathopen(nullstr, profile)) >= 0) {
exfile(rflag);
flags &= ~ttyflg;
;
}
if (rflag == 0) {
flags |= rshflg;
}
/* open input file if specified */
if (comdiv) {
estabf(comdiv);
input = -1;
} else {
input = ((flags & stdflg) ? 0 : chkopen(cmdadr));
comdiv--;
;
}
// } else { *execargs=(char *)dolv; /* for `ps' cmd */
;
}
exfile(0);
done();
}
