• implement KSHEGID, KSHGID, KSHUID variables by suggestion of Richard K.
(KSHEUID aka USER_ID already exists) • simplify, speed up LCG and $RANDOM handling again
This commit is contained in:
tg
parent
1d6e0470e0
commit
cc31d86e3b
109
jobs.c
109
jobs.c
@ -1,7 +1,7 @@
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/* $OpenBSD: jobs.c,v 1.38 2009/12/12 04:28:44 deraadt Exp $ */
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/*-
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* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009
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* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2011
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* Thorsten Glaser <tg@mirbsd.org>
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*
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* Provided that these terms and disclaimer and all copyright notices
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@ -22,7 +22,7 @@
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#include "sh.h"
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__RCSID("$MirOS: src/bin/mksh/jobs.c,v 1.72 2010/08/28 20:22:19 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/jobs.c,v 1.73 2011/01/21 21:04:44 tg Exp $");
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#if HAVE_KILLPG
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#define mksh_killpg killpg
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@ -342,11 +342,9 @@ exchild(struct op *t, int flags,
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int rv = 0, forksleep;
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sigset_t omask;
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struct {
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Proc *p;
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Job *j;
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pid_t cldpid;
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} pi;
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Proc *p;
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Job *j;
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pid_t cldpid;
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if (flags & XEXEC)
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/*
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@ -358,11 +356,11 @@ exchild(struct op *t, int flags,
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/* no SIGCHLDs while messing with job and process lists */
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sigprocmask(SIG_BLOCK, &sm_sigchld, &omask);
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pi.p = new_proc();
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pi.p->next = NULL;
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pi.p->state = PRUNNING;
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pi.p->status = 0;
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pi.p->pid = 0;
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p = new_proc();
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p->next = NULL;
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p->state = PRUNNING;
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p->status = 0;
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p->pid = 0;
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/* link process into jobs list */
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if (flags & XPIPEI) {
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@ -371,78 +369,76 @@ exchild(struct op *t, int flags,
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internal_errorf("%s %d",
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"exchild: XPIPEI and no last_job - pid",
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(int)procpid);
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pi.j = last_job;
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j = last_job;
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if (last_proc)
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last_proc->next = pi.p;
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last_proc = pi.p;
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last_proc->next = p;
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last_proc = p;
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} else {
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pi.j = new_job(); /* fills in pi.j->job */
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/* fills in j->job */
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j = new_job();
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/*
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* we don't consider XXCOMs foreground since they don't get
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* tty process group and we don't save or restore tty modes.
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*/
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pi.j->flags = (flags & XXCOM) ? JF_XXCOM :
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j->flags = (flags & XXCOM) ? JF_XXCOM :
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((flags & XBGND) ? 0 : (JF_FG|JF_USETTYMODE));
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timerclear(&pi.j->usrtime);
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timerclear(&pi.j->systime);
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pi.j->state = PRUNNING;
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pi.j->pgrp = 0;
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pi.j->ppid = procpid;
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pi.j->age = ++njobs;
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pi.j->proc_list = pi.p;
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pi.j->coproc_id = 0;
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last_job = pi.j;
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last_proc = pi.p;
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put_job(pi.j, PJ_PAST_STOPPED);
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timerclear(&j->usrtime);
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timerclear(&j->systime);
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j->state = PRUNNING;
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j->pgrp = 0;
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j->ppid = procpid;
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j->age = ++njobs;
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j->proc_list = p;
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j->coproc_id = 0;
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last_job = j;
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last_proc = p;
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put_job(j, PJ_PAST_STOPPED);
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}
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snptreef(pi.p->command, sizeof(pi.p->command), "%T", t);
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snptreef(p->command, sizeof(p->command), "%T", t);
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/* create child process */
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forksleep = 1;
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while ((pi.cldpid = fork()) < 0 && errno == EAGAIN && forksleep < 32) {
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while ((cldpid = fork()) < 0 && errno == EAGAIN && forksleep < 32) {
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if (intrsig) /* allow user to ^C out... */
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break;
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sleep(forksleep);
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forksleep <<= 1;
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}
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if (pi.cldpid < 0) {
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kill_job(pi.j, SIGKILL);
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remove_job(pi.j, "fork failed");
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/* ensure $RANDOM changes between parent and child */
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rndset((long)cldpid);
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/* fork failed? */
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if (cldpid < 0) {
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kill_job(j, SIGKILL);
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remove_job(j, "fork failed");
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sigprocmask(SIG_SETMASK, &omask, NULL);
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errorf("can't fork - try again");
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}
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pi.p->pid = pi.cldpid ? pi.cldpid : (procpid = getpid());
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/*
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* ensure next child gets a (slightly) different $RANDOM sequence
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* from its parent process and other child processes
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*/
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change_random(&pi, sizeof(pi));
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p->pid = cldpid ? cldpid : (procpid = getpid());
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#ifndef MKSH_UNEMPLOYED
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/* job control set up */
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if (Flag(FMONITOR) && !(flags&XXCOM)) {
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int dotty = 0;
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if (pi.j->pgrp == 0) { /* First process */
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pi.j->pgrp = pi.p->pid;
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if (j->pgrp == 0) { /* First process */
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j->pgrp = p->pid;
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dotty = 1;
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}
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/* set pgrp in both parent and child to deal with race
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* condition
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*/
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setpgid(pi.p->pid, pi.j->pgrp);
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setpgid(p->pid, j->pgrp);
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if (ttypgrp_ok && dotty && !(flags & XBGND))
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tcsetpgrp(tty_fd, pi.j->pgrp);
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tcsetpgrp(tty_fd, j->pgrp);
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}
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#endif
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/* used to close pipe input fd */
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if (close_fd >= 0 && (((flags & XPCLOSE) && pi.cldpid) ||
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((flags & XCCLOSE) && !pi.cldpid)))
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if (close_fd >= 0 && (((flags & XPCLOSE) && cldpid) ||
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((flags & XCCLOSE) && !cldpid)))
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close(close_fd);
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if (!pi.cldpid) {
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if (!cldpid) {
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/* child */
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/* Do this before restoring signal */
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@ -480,7 +476,7 @@ exchild(struct op *t, int flags,
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close(forksleep);
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}
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}
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remove_job(pi.j, "child"); /* in case of $(jobs) command */
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remove_job(j, "child"); /* in case of $(jobs) command */
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nzombie = 0;
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#ifndef MKSH_UNEMPLOYED
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ttypgrp_ok = false;
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@ -505,27 +501,26 @@ exchild(struct op *t, int flags,
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/* shell (parent) stuff */
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if (!(flags & XPIPEO)) { /* last process in a job */
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j_startjob(pi.j);
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j_startjob(j);
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if (flags & XCOPROC) {
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pi.j->coproc_id = coproc.id;
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j->coproc_id = coproc.id;
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/* n jobs using co-process output */
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coproc.njobs++;
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/* j using co-process input */
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coproc.job = (void *)pi.j;
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coproc.job = (void *)j;
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}
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if (flags & XBGND) {
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j_set_async(pi.j);
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j_set_async(j);
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if (Flag(FTALKING)) {
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shf_fprintf(shl_out, "[%d]", pi.j->job);
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for (pi.p = pi.j->proc_list; pi.p;
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pi.p = pi.p->next)
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shf_fprintf(shl_out, "[%d]", j->job);
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for (p = j->proc_list; p; p = p->next)
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shf_fprintf(shl_out, " %d",
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(int)pi.p->pid);
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(int)p->pid);
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shf_putchar('\n', shl_out);
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shf_flush(shl_out);
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}
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} else
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rv = j_waitj(pi.j, JW_NONE, "jw:last proc");
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rv = j_waitj(j, JW_NONE, "jw:last proc");
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}
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sigprocmask(SIG_SETMASK, &omask, NULL);
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176
main.c
176
main.c
@ -4,7 +4,7 @@
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/* $OpenBSD: table.c,v 1.13 2009/01/17 22:06:44 millert Exp $ */
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/*-
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* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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* Thorsten Glaser <tg@mirbsd.org>
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*
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* Provided that these terms and disclaimer and all copyright notices
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@ -33,15 +33,10 @@
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#include <locale.h>
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#endif
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__RCSID("$MirOS: src/bin/mksh/main.c,v 1.173 2010/11/01 17:29:04 tg Exp $");
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__RCSID("$MirOS: src/bin/mksh/main.c,v 1.174 2011/01/21 21:04:44 tg Exp $");
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extern char **environ;
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#if !HAVE_SETRESUGID
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extern uid_t kshuid;
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extern gid_t kshgid, kshegid;
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#endif
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#ifndef MKSHRC_PATH
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#define MKSHRC_PATH "~/.mkshrc"
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#endif
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@ -50,10 +45,10 @@ extern gid_t kshgid, kshegid;
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#define MKSH_DEFAULT_TMPDIR "/tmp"
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#endif
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void chvt_reinit(void);
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static void reclaim(void);
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static void remove_temps(struct temp *);
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void chvt_reinit(void);
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Source *mksh_init(int, const char *[]);
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static mksh_uari_t rndsetup(void);
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#ifdef SIGWINCH
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static void x_sigwinch(int);
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#endif
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@ -66,8 +61,9 @@ static const char initsubs[] =
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static const char *initcoms[] = {
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T_typeset, "-r", initvsn, NULL,
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T_typeset, "-x", "HOME", "PATH", "RANDOM", "SHELL", NULL,
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T_typeset, "-i10", "COLUMNS", "LINES", "OPTIND", "PGRP", "PPID",
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"RANDOM", "SECONDS", "TMOUT", "USER_ID", NULL,
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T_typeset, "-i10", "COLUMNS", "KSHEGID", "KSHGID", "KSHUID", "LINES",
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"OPTIND", "PGRP", "PPID", "RANDOM", "SECONDS", "TMOUT", "USER_ID",
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NULL,
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T_alias,
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"integer=typeset -i",
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T_local_typeset,
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@ -97,7 +93,41 @@ static const char *initcoms[] = {
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static int initio_done;
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struct env *e = &kshstate_v.env_;
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/* top-level parsing and execution environment */
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static struct env env;
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struct env *e = &env;
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static mksh_uari_t
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rndsetup(void)
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{
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register uint32_t h;
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struct {
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ALLOC_ITEM __alloc_i;
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void *dataptr, *stkptr, *mallocptr;
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sigjmp_buf jbuf;
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struct timeval tv;
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struct timezone tz;
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} *bufptr;
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char *cp;
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cp = alloc(sizeof(*bufptr) - ALLOC_SIZE, APERM);
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bufptr = (void *)(cp - ALLOC_SIZE); /* undo what alloc() did */
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bufptr->dataptr = &rndsetupstate; /* PIE or something */
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bufptr->stkptr = &bufptr; /* ASLR in Win/Lin */
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bufptr->mallocptr = bufptr; /* randomised malloc in BSD */
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sigsetjmp(bufptr->jbuf, 1); /* glibc pointer guard */
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gettimeofday(&bufptr->tv, &bufptr->tz); /* introduce variation */
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oaat1_init_impl(h);
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/* variation through pid, ppid, and the works */
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oaat1_addmem_impl(h, &rndsetupstate, sizeof(rndsetupstate));
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/* some variation, some possibly entropy, depending on OE */
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oaat1_addmem_impl(h, bufptr, sizeof(*bufptr));
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oaat1_fini_impl(h);
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afree(cp, APERM);
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return ((mksh_uari_t)h);
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}
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void
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chvt_reinit(void)
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@ -108,8 +138,8 @@ chvt_reinit(void)
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kshppid = getppid();
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}
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Source *
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mksh_init(int argc, const char *argv[])
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int
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main(int argc, const char *argv[])
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{
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int argi, i;
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Source *s;
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@ -140,16 +170,17 @@ mksh_init(int argc, const char *argv[])
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ainit(&aperm); /* initialise permanent Area */
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/* set up base environment */
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kshstate_v.env_.type = E_NONE;
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ainit(&kshstate_v.env_.area);
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newblock(); /* set up global l->vars and l->funs */
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env.type = E_NONE;
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ainit(&env.area);
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/* set up global l->vars and l->funs */
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newblock();
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/* Do this first so output routines (eg, errorf, shellf) can work */
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initio();
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argi = parse_args(argv, OF_FIRSTTIME, NULL);
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if (argi < 0)
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return (NULL);
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return (1);
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initvar();
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@ -197,28 +228,33 @@ mksh_init(int argc, const char *argv[])
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def_path = "/bin:/usr/bin:/sbin:/usr/sbin";
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#endif
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/* Set PATH to def_path (will set the path global variable).
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/*
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* Set PATH to def_path (will set the path global variable).
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* (import of environment below will probably change this setting).
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*/
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vp = global("PATH");
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/* setstr can't fail here */
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setstr(vp, def_path, KSH_RETURN_ERROR);
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/* Turn on nohup by default for now - will change to off
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/*
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* Turn on nohup by default for now - will change to off
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* by default once people are aware of its existence
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* (AT&T ksh does not have a nohup option - it always sends
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* the hup).
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*/
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Flag(FNOHUP) = 1;
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/* Turn on brace expansion by default. AT&T kshs that have
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/*
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* Turn on brace expansion by default. AT&T kshs that have
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* alternation always have it on.
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*/
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Flag(FBRACEEXPAND) = 1;
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/* Set edit mode to emacs by default, may be overridden
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/*
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* Set edit mode to emacs by default, may be overridden
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* by the environment or the user. Also, we want tab completion
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* on in vi by default. */
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* on in vi by default.
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*/
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change_flag(FEMACS, OF_SPECIAL, 1);
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#if !MKSH_S_NOVI
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Flag(FVITABCOMPLETE) = 1;
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@ -266,7 +302,8 @@ mksh_init(int argc, const char *argv[])
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set_current_wd(pwdx);
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if (current_wd[0])
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simplify_path(current_wd);
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/* Only set pwd if we know where we are or if it had a
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/*
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* Only set pwd if we know where we are or if it had a
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* bogus value
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*/
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if (current_wd[0] || pwd != null)
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@ -283,6 +320,10 @@ mksh_init(int argc, const char *argv[])
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setint(global("LINES"), 0);
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setint(global("OPTIND"), 1);
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kshuid = getuid();
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kshgid = getgid();
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kshegid = getegid();
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safe_prompt = ksheuid ? "$ " : "# ";
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vp = global("PS1");
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/* Set PS1 if unset or we are root and prompt doesn't contain a # */
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@ -294,18 +335,19 @@ mksh_init(int argc, const char *argv[])
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vp->flag |= INT_U;
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setint((vp = global("PPID")), (mksh_uari_t)kshppid);
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vp->flag |= INT_U;
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setint((vp = global("RANDOM")), (mksh_uari_t)evilhash(kshname));
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vp->flag |= INT_U;
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setint((vp = global("USER_ID")), (mksh_uari_t)ksheuid);
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vp->flag |= INT_U;
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setint((vp = global("KSHUID")), (mksh_uari_t)kshuid);
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vp->flag |= INT_U;
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setint((vp = global("KSHEGID")), (mksh_uari_t)kshegid);
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vp->flag |= INT_U;
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setint((vp = global("KSHGID")), (mksh_uari_t)kshgid);
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vp->flag |= INT_U;
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setint((vp = global("RANDOM")), rndsetup());
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vp->flag |= INT_U;
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/* Set this before parsing arguments */
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#if HAVE_SETRESUGID
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Flag(FPRIVILEGED) = getuid() != ksheuid || getgid() != getegid();
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#else
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Flag(FPRIVILEGED) = (kshuid = getuid()) != ksheuid ||
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(kshgid = getgid()) != (kshegid = getegid());
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#endif
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Flag(FPRIVILEGED) = kshuid != ksheuid || kshgid != kshegid;
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/* this to note if monitor is set on command line (see below) */
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#ifndef MKSH_UNEMPLOYED
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@ -316,7 +358,7 @@ mksh_init(int argc, const char *argv[])
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argi = parse_args(argv, OF_CMDLINE, NULL);
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if (argi < 0)
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return (NULL);
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return (1);
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/* process this later only, default to off (hysterical raisins) */
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utf_flag = UTFMODE;
|
||||
@ -422,7 +464,8 @@ mksh_init(int argc, const char *argv[])
|
||||
errexit = Flag(FERREXIT);
|
||||
Flag(FERREXIT) = 0;
|
||||
|
||||
/* Do this before profile/$ENV so that if it causes problems in them,
|
||||
/*
|
||||
* Do this before profile/$ENV so that if it causes problems in them,
|
||||
* user will know why things broke.
|
||||
*/
|
||||
if (!current_wd[0] && Flag(FTALKING))
|
||||
@ -464,23 +507,9 @@ mksh_init(int argc, const char *argv[])
|
||||
} else
|
||||
Flag(FTRACKALL) = 1; /* set after ENV */
|
||||
|
||||
return (s);
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, const char *argv[])
|
||||
{
|
||||
Source *s;
|
||||
|
||||
kshstate_v.lcg_state_ = 5381;
|
||||
|
||||
if ((s = mksh_init(argc, argv))) {
|
||||
/* put more entropy into the LCG */
|
||||
change_random(s, sizeof(*s));
|
||||
/* doesn't return */
|
||||
shell(s, true);
|
||||
}
|
||||
return (1);
|
||||
/* doesn't return */
|
||||
shell(s, true);
|
||||
return (0);
|
||||
}
|
||||
|
||||
int
|
||||
@ -516,7 +545,8 @@ include(const char *name, int argc, const char **argv, int intr_ok)
|
||||
case LERROR:
|
||||
return (exstat & 0xff); /* see below */
|
||||
case LINTR:
|
||||
/* intr_ok is set if we are including .profile or $ENV.
|
||||
/*
|
||||
* intr_ok is set if we are including .profile or $ENV.
|
||||
* If user ^Cs out, we don't want to kill the shell...
|
||||
*/
|
||||
if (intr_ok && (exstat - 128) != SIGTERM)
|
||||
@ -587,13 +617,15 @@ shell(Source * volatile s, volatile int toplevel)
|
||||
if (interactive) {
|
||||
if (i == LINTR)
|
||||
shellf("\n");
|
||||
/* Reset any eof that was read as part of a
|
||||
/*
|
||||
* Reset any eof that was read as part of a
|
||||
* multiline command.
|
||||
*/
|
||||
if (Flag(FIGNOREEOF) && s->type == SEOF &&
|
||||
wastty)
|
||||
s->type = SSTDIN;
|
||||
/* Used by exit command to get back to
|
||||
/*
|
||||
* Used by exit command to get back to
|
||||
* top level shell. Kind of strange since
|
||||
* interactive is set if we are reading from
|
||||
* a tty, but to have stopped jobs, one only
|
||||
@ -642,7 +674,8 @@ shell(Source * volatile s, volatile int toplevel)
|
||||
really_exit = 1;
|
||||
s->type = SSTDIN;
|
||||
} else {
|
||||
/* this for POSIX which says EXIT traps
|
||||
/*
|
||||
* this for POSIX which says EXIT traps
|
||||
* shall be taken in the environment
|
||||
* immediately after the last command
|
||||
* executed.
|
||||
@ -742,7 +775,8 @@ quitenv(struct shf *shf)
|
||||
if (ep->savefd[2]) /* Clear any write errors */
|
||||
shf_reopen(2, SHF_WR, shl_out);
|
||||
}
|
||||
/* Bottom of the stack.
|
||||
/*
|
||||
* Bottom of the stack.
|
||||
* Either main shell is exiting or cleanup_parents_env() was called.
|
||||
*/
|
||||
if (ep->oenv == NULL) {
|
||||
@ -755,7 +789,8 @@ quitenv(struct shf *shf)
|
||||
if (ep->flags & EF_FAKE_SIGDIE) {
|
||||
int sig = exstat - 128;
|
||||
|
||||
/* ham up our death a bit (AT&T ksh
|
||||
/*
|
||||
* ham up our death a bit (AT&T ksh
|
||||
* only seems to do this for SIGTERM)
|
||||
* Don't do it for SIGQUIT, since we'd
|
||||
* dump a core..
|
||||
@ -839,7 +874,8 @@ remove_temps(struct temp *tp)
|
||||
unlink(tp->name);
|
||||
}
|
||||
|
||||
/* Initialise tty_fd. Used for saving/reseting tty modes upon
|
||||
/*
|
||||
* Initialise tty_fd. Used for saving/reseting tty modes upon
|
||||
* foreground job completion and for setting up tty process group.
|
||||
*/
|
||||
void
|
||||
@ -937,7 +973,8 @@ warningf(bool fileline, const char *fmt, ...)
|
||||
shf_flush(shl_out);
|
||||
}
|
||||
|
||||
/* Used by built-in utilities to prefix shell and utility name to message
|
||||
/*
|
||||
* Used by built-in utilities to prefix shell and utility name to message
|
||||
* (also unwinds environments for special builtins).
|
||||
*/
|
||||
void
|
||||
@ -958,7 +995,8 @@ bi_errorf(const char *fmt, ...)
|
||||
shf_putchar('\n', shl_out);
|
||||
}
|
||||
shf_flush(shl_out);
|
||||
/* POSIX special builtins and ksh special builtins cause
|
||||
/*
|
||||
* POSIX special builtins and ksh special builtins cause
|
||||
* non-interactive shells to exit.
|
||||
* XXX odd use of KEEPASN; also may not want LERROR here
|
||||
*/
|
||||
@ -1133,7 +1171,8 @@ closepipe(int *pv)
|
||||
close(pv[1]);
|
||||
}
|
||||
|
||||
/* Called by iosetup() (deals with 2>&4, etc.), c_read, c_print to turn
|
||||
/*
|
||||
* Called by iosetup() (deals with 2>&4, etc.), c_read, c_print to turn
|
||||
* a string (the X in 2>&X, read -uX, print -uX) into a file descriptor.
|
||||
*/
|
||||
int
|
||||
@ -1156,7 +1195,8 @@ check_fd(const char *name, int mode, const char **emsgp)
|
||||
return (-1);
|
||||
}
|
||||
fl &= O_ACCMODE;
|
||||
/* X_OK is a kludge to disable this check for dups (x<&1):
|
||||
/*
|
||||
* X_OK is a kludge to disable this check for dups (x<&1):
|
||||
* historical shells never did this check (XXX don't know what
|
||||
* POSIX has to say).
|
||||
*/
|
||||
@ -1192,7 +1232,8 @@ coproc_read_close(int fd)
|
||||
}
|
||||
}
|
||||
|
||||
/* Called by c_read() and by iosetup() to close the other side of the
|
||||
/*
|
||||
* Called by c_read() and by iosetup() to close the other side of the
|
||||
* read pipe, so reads will actually terminate.
|
||||
*/
|
||||
void
|
||||
@ -1204,7 +1245,8 @@ coproc_readw_close(int fd)
|
||||
}
|
||||
}
|
||||
|
||||
/* Called by c_print when a write to a fd fails with EPIPE and by iosetup
|
||||
/*
|
||||
* Called by c_print when a write to a fd fails with EPIPE and by iosetup
|
||||
* when co-process input is dup'd
|
||||
*/
|
||||
void
|
||||
@ -1216,7 +1258,8 @@ coproc_write_close(int fd)
|
||||
}
|
||||
}
|
||||
|
||||
/* Called to check for existence of/value of the co-process file descriptor.
|
||||
/*
|
||||
* Called to check for existence of/value of the co-process file descriptor.
|
||||
* (Used by check_fd() and by c_read/c_print to deal with -p option).
|
||||
*/
|
||||
int
|
||||
@ -1231,7 +1274,8 @@ coproc_getfd(int mode, const char **emsgp)
|
||||
return (-1);
|
||||
}
|
||||
|
||||
/* called to close file descriptors related to the coprocess (if any)
|
||||
/*
|
||||
* called to close file descriptors related to the coprocess (if any)
|
||||
* Should be called with SIGCHLD blocked.
|
||||
*/
|
||||
void
|
||||
|
||||
25
misc.c
25
misc.c
@ -29,15 +29,10 @@
|
||||
#include <grp.h>
|
||||
#endif
|
||||
|
||||
__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.149 2011/01/09 21:57:27 tg Exp $");
|
||||
__RCSID("$MirOS: src/bin/mksh/misc.c,v 1.150 2011/01/21 21:04:45 tg Exp $");
|
||||
|
||||
unsigned char chtypes[UCHAR_MAX + 1]; /* type bits for unsigned char */
|
||||
|
||||
#if !HAVE_SETRESUGID
|
||||
uid_t kshuid;
|
||||
gid_t kshgid, kshegid;
|
||||
#endif
|
||||
|
||||
static int do_gmatch(const unsigned char *, const unsigned char *,
|
||||
const unsigned char *, const unsigned char *);
|
||||
static const unsigned char *cclass(const unsigned char *, int);
|
||||
@ -233,9 +228,10 @@ change_flag(enum sh_flag f, int what, unsigned int newval)
|
||||
Flag(f) = (unsigned char)newval;
|
||||
} else if (f == FPRIVILEGED && oldval && !newval) {
|
||||
/* Turning off -p? */
|
||||
#if HAVE_SETRESUGID
|
||||
gid_t kshegid = getgid();
|
||||
|
||||
/*XXX this can probably be optimised */
|
||||
kshegid = kshgid = getgid();
|
||||
#if HAVE_SETRESUGID
|
||||
DO_SETUID(setresgid, (kshegid, kshegid, kshegid));
|
||||
#if HAVE_SETGROUPS
|
||||
/* setgroups doesn't EAGAIN on Linux */
|
||||
@ -246,7 +242,7 @@ change_flag(enum sh_flag f, int what, unsigned int newval)
|
||||
/* seteuid, setegid, setgid don't EAGAIN on Linux */
|
||||
seteuid(ksheuid = kshuid = getuid());
|
||||
DO_SETUID(setuid, (ksheuid));
|
||||
setegid(kshegid = kshgid = getgid());
|
||||
setegid(kshegid);
|
||||
setgid(kshegid);
|
||||
#endif
|
||||
} else if ((f == FPOSIX || f == FSH) && newval) {
|
||||
@ -1305,9 +1301,6 @@ chvt(const char *fn)
|
||||
struct stat sb;
|
||||
int fd;
|
||||
|
||||
/* for entropy */
|
||||
kshstate_f.h = evilhash(fn);
|
||||
|
||||
if (*fn == '-') {
|
||||
memcpy(dv, "-/dev/null", sizeof("-/dev/null"));
|
||||
fn = dv + 1;
|
||||
@ -1362,6 +1355,14 @@ chvt(const char *fn)
|
||||
ksh_dup2(fd, 2, false);
|
||||
if (fd > 2)
|
||||
close(fd);
|
||||
{
|
||||
register uint32_t h;
|
||||
|
||||
oaat1_init_impl(h);
|
||||
oaat1_addmem_impl(h, &rndsetupstate, sizeof(rndsetupstate));
|
||||
oaat1_fini_impl(h);
|
||||
rndset((long)h);
|
||||
}
|
||||
chvt_reinit();
|
||||
}
|
||||
#endif
|
||||
|
||||
10
mksh.1
10
mksh.1
@ -1,4 +1,4 @@
|
||||
.\" $MirOS: src/bin/mksh/mksh.1,v 1.244 2011/01/09 21:57:27 tg Exp $
|
||||
.\" $MirOS: src/bin/mksh/mksh.1,v 1.245 2011/01/21 21:04:45 tg Exp $
|
||||
.\" $OpenBSD: ksh.1,v 1.138 2010/09/20 07:41:17 jmc Exp $
|
||||
.\"-
|
||||
.\" Copyright © 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
|
||||
@ -72,7 +72,7 @@
|
||||
.\" with -mandoc, it might implement .Mx itself, but we want to
|
||||
.\" use our own definition. And .Dd must come *first*, always.
|
||||
.\"
|
||||
.Dd $Mdocdate: January 9 2011 $
|
||||
.Dd $Mdocdate: January 21 2011 $
|
||||
.\"
|
||||
.\" Check which macro package we use
|
||||
.\"
|
||||
@ -1768,6 +1768,12 @@ above for details.
|
||||
.Sy Note :
|
||||
This parameter is not imported from the environment when the shell is
|
||||
started.
|
||||
.It Ev KSHEGID
|
||||
The effective group id of the shell.
|
||||
.It Ev KSHGID
|
||||
The real group id of the shell.
|
||||
.It Ev KSHUID
|
||||
The real user id of the shell.
|
||||
.It Ev KSH_VERSION
|
||||
The name and version of the shell (read-only).
|
||||
See also the version commands in
|
||||
|
||||
99
sh.h
99
sh.h
@ -154,7 +154,7 @@
|
||||
#endif
|
||||
|
||||
#ifdef EXTERN
|
||||
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.421 2011/01/09 21:57:29 tg Exp $");
|
||||
__RCSID("$MirOS: src/bin/mksh/sh.h,v 1.422 2011/01/21 21:04:47 tg Exp $");
|
||||
#endif
|
||||
#define MKSH_VERSION "R39 2011/01/08"
|
||||
|
||||
@ -519,7 +519,7 @@ enum sh_flag {
|
||||
FNFLAGS /* (place holder: how many flags are there) */
|
||||
};
|
||||
|
||||
#define Flag(f) (kshstate_v.shell_flags_[(int)(f)])
|
||||
#define Flag(f) (shell_flags[(int)(f)])
|
||||
#define UTFMODE Flag(FUNICODE)
|
||||
|
||||
/*
|
||||
@ -569,46 +569,31 @@ extern struct env {
|
||||
#define LSHELL 8 /* return to interactive shell() */
|
||||
#define LAEXPR 9 /* error in arithmetic expression */
|
||||
|
||||
/*
|
||||
* some kind of global shell state, for change_random() mostly
|
||||
*/
|
||||
|
||||
EXTERN struct mksh_kshstate_v {
|
||||
/* for change_random */
|
||||
struct timeval cr_tv; /* timestamp */
|
||||
const void *cr_dp; /* argument address */
|
||||
size_t cr_dsz; /* argument length */
|
||||
uint32_t lcg_state_; /* previous LCG state */
|
||||
/* global state */
|
||||
pid_t procpid_; /* PID of executing process */
|
||||
int exstat_; /* exit status */
|
||||
int subst_exstat_; /* exit status of last $(..)/`..` */
|
||||
struct env env_; /* top-level parsing & execution env. */
|
||||
short trap_exstat_; /* exit status before running a trap */
|
||||
uint8_t trap_nested_; /* running nested traps */
|
||||
uint8_t shell_flags_[FNFLAGS];
|
||||
} kshstate_v;
|
||||
EXTERN struct mksh_kshstate_f {
|
||||
const char *kshname_; /* $0 */
|
||||
pid_t kshpid_; /* $$, shell PID */
|
||||
pid_t kshpgrp_; /* process group of shell */
|
||||
/* sort of shell global state */
|
||||
EXTERN pid_t procpid; /* PID of executing process */
|
||||
EXTERN int exstat; /* exit status */
|
||||
EXTERN int subst_exstat; /* exit status of last $(..)/`..` */
|
||||
EXTERN short trap_exstat; /* exit status before running a trap */
|
||||
EXTERN uint8_t trap_nested; /* running nested traps */
|
||||
EXTERN uint8_t shell_flags[FNFLAGS];
|
||||
EXTERN const char *kshname; /* $0 */
|
||||
EXTERN struct {
|
||||
uid_t kshuid_; /* real UID of shell */
|
||||
uid_t ksheuid_; /* effective UID of shell */
|
||||
gid_t kshgid_; /* real GID of shell */
|
||||
gid_t kshegid_; /* effective GID of shell */
|
||||
pid_t kshpgrp_; /* process group of shell */
|
||||
pid_t kshppid_; /* PID of parent of shell */
|
||||
uint32_t h; /* some kind of hash */
|
||||
} kshstate_f;
|
||||
#define kshname kshstate_f.kshname_
|
||||
#define kshpid kshstate_f.kshpid_
|
||||
#define procpid kshstate_v.procpid_
|
||||
#define kshpgrp kshstate_f.kshpgrp_
|
||||
#define ksheuid kshstate_f.ksheuid_
|
||||
#define kshppid kshstate_f.kshppid_
|
||||
#define exstat kshstate_v.exstat_
|
||||
#define subst_exstat kshstate_v.subst_exstat_
|
||||
#define trap_exstat kshstate_v.trap_exstat_
|
||||
#define trap_nested kshstate_v.trap_nested_
|
||||
pid_t kshpid_; /* $$, shell PID */
|
||||
} rndsetupstate;
|
||||
|
||||
/* evil hack: return hash(kshstate_f concat (kshstate_f'.h:=hash(arg))) */
|
||||
uint32_t evilhash(const char *);
|
||||
#define kshpid rndsetupstate.kshpid_
|
||||
#define kshpgrp rndsetupstate.kshpgrp_
|
||||
#define kshuid rndsetupstate.kshuid_
|
||||
#define ksheuid rndsetupstate.ksheuid_
|
||||
#define kshgid rndsetupstate.kshgid_
|
||||
#define kshegid rndsetupstate.kshegid_
|
||||
#define kshppid rndsetupstate.kshppid_
|
||||
|
||||
|
||||
/* option processing */
|
||||
@ -1407,6 +1392,36 @@ EXTERN struct timeval j_usrtime, j_systime;
|
||||
'+', (unsigned long)(cnst)); \
|
||||
} while (/* CONSTCOND */ 0)
|
||||
|
||||
/* Bob Jenkins' one-at-a-time hash, with better start value */
|
||||
#define oaat1_init_impl(h) do { \
|
||||
(h) = 0x100; \
|
||||
} while (/* CONSTCOND */ 0)
|
||||
#define oaat1_addmem_impl(h, buf, len) do { \
|
||||
register const uint8_t *oaat1_addmem_p = (const void *)(buf); \
|
||||
register size_t oaat1_addmem_n = (len); \
|
||||
\
|
||||
while (oaat1_addmem_n--) { \
|
||||
(h) += *oaat1_addmem_p++; \
|
||||
(h) += (h) << 10; \
|
||||
(h) ^= (h) >> 6; \
|
||||
} \
|
||||
} while (/* CONSTCOND */ 0)
|
||||
#define oaat1_addstr_impl(h, s) do { \
|
||||
register const uint8_t *oaat1_addstr_p = (const void *)(s); \
|
||||
register uint8_t oaat1_addstr_c; \
|
||||
\
|
||||
while ((oaat1_addstr_c = *oaat1_addstr_p++)) { \
|
||||
h += oaat1_addstr_c; \
|
||||
(h) += (h) << 10; \
|
||||
(h) ^= (h) >> 6; \
|
||||
} \
|
||||
} while (/* CONSTCOND */ 0)
|
||||
#define oaat1_fini_impl(h) do { \
|
||||
(h) += (h) << 3; \
|
||||
(h) ^= (h) >> 11; \
|
||||
(h) += (h) << 15; \
|
||||
} while (/* CONSTCOND */ 0)
|
||||
|
||||
/* lalloc.c */
|
||||
void ainit(Area *);
|
||||
void afreeall(Area *);
|
||||
@ -1614,9 +1629,6 @@ void coproc_write_close(int);
|
||||
int coproc_getfd(int, const char **);
|
||||
void coproc_cleanup(int);
|
||||
struct temp *maketemp(Area *, Temp_type, struct temp **);
|
||||
#define hash(s) oaathash_full((const uint8_t *)(s))
|
||||
uint32_t oaathash_full(register const uint8_t *);
|
||||
uint32_t hashmem(const void *, size_t);
|
||||
void ktinit(struct table *, Area *, size_t);
|
||||
struct tbl *ktsearch(struct table *, const char *, uint32_t);
|
||||
struct tbl *ktenter(struct table *, const char *, uint32_t);
|
||||
@ -1712,11 +1724,12 @@ const char *skip_wdvarname(const char *, int);
|
||||
int is_wdvarname(const char *, int);
|
||||
int is_wdvarassign(const char *);
|
||||
char **makenv(void);
|
||||
void change_random(const void *, size_t);
|
||||
void change_winsz(void);
|
||||
int array_ref_len(const char *);
|
||||
char *arrayname(const char *);
|
||||
mksh_uari_t set_array(const char *, bool, const char **);
|
||||
uint32_t hash(const void *);
|
||||
void rndset(long);
|
||||
|
||||
enum Test_op {
|
||||
TO_NONOP = 0, /* non-operator */
|
||||
|
||||
135
var.c
135
var.c
@ -1,7 +1,7 @@
|
||||
/* $OpenBSD: var.c,v 1.34 2007/10/15 02:16:35 deraadt Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
|
||||
* Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
|
||||
* Thorsten Glaser <tg@mirbsd.org>
|
||||
*
|
||||
* Provided that these terms and disclaimer and all copyright notices
|
||||
@ -26,7 +26,7 @@
|
||||
#include <sys/sysctl.h>
|
||||
#endif
|
||||
|
||||
__RCSID("$MirOS: src/bin/mksh/var.c,v 1.114 2010/09/19 19:21:20 tg Exp $");
|
||||
__RCSID("$MirOS: src/bin/mksh/var.c,v 1.115 2011/01/21 21:04:48 tg Exp $");
|
||||
|
||||
/*
|
||||
* Variables
|
||||
@ -39,6 +39,8 @@ __RCSID("$MirOS: src/bin/mksh/var.c,v 1.114 2010/09/19 19:21:20 tg Exp $");
|
||||
*/
|
||||
static struct tbl vtemp;
|
||||
static struct table specials;
|
||||
static uint32_t lcg_state = 5381;
|
||||
|
||||
static char *formatstr(struct tbl *, const char *);
|
||||
static void exportprep(struct tbl *, const char *);
|
||||
static int special(const char *);
|
||||
@ -50,9 +52,6 @@ static int getint(struct tbl *, mksh_ari_t *, bool);
|
||||
static mksh_ari_t intval(struct tbl *);
|
||||
static struct tbl *arraysearch(struct tbl *, uint32_t);
|
||||
static const char *array_index_calc(const char *, bool *, uint32_t *);
|
||||
static uint32_t oaathash_update(register uint32_t, register const uint8_t *,
|
||||
register size_t);
|
||||
static uint32_t oaathash_finalise(register uint32_t);
|
||||
|
||||
uint8_t set_refflag = 0;
|
||||
|
||||
@ -986,79 +985,6 @@ makenv(void)
|
||||
return ((char **)XPclose(denv));
|
||||
}
|
||||
|
||||
/* Bob Jenkins' one-at-a-time hash */
|
||||
static uint32_t
|
||||
oaathash_update(register uint32_t h, register const uint8_t *cp,
|
||||
register size_t n)
|
||||
{
|
||||
while (n--) {
|
||||
h += *cp++;
|
||||
h += h << 10;
|
||||
h ^= h >> 6;
|
||||
}
|
||||
|
||||
return (h);
|
||||
}
|
||||
|
||||
static uint32_t
|
||||
oaathash_finalise(register uint32_t h)
|
||||
{
|
||||
h += h << 3;
|
||||
h ^= h >> 11;
|
||||
h += h << 15;
|
||||
|
||||
return (h);
|
||||
}
|
||||
|
||||
uint32_t
|
||||
oaathash_full(register const uint8_t *bp)
|
||||
{
|
||||
register uint32_t h = 0;
|
||||
register uint8_t c;
|
||||
|
||||
while ((c = *bp++)) {
|
||||
h += c;
|
||||
h += h << 10;
|
||||
h ^= h >> 6;
|
||||
}
|
||||
|
||||
return (oaathash_finalise(h));
|
||||
}
|
||||
|
||||
void
|
||||
change_random(const void *vp, size_t n)
|
||||
{
|
||||
register uint32_t h = 0x100;
|
||||
#if defined(arc4random_pushb_fast) || defined(MKSH_A4PB)
|
||||
uint32_t i;
|
||||
#endif
|
||||
|
||||
kshstate_v.cr_dp = vp;
|
||||
kshstate_v.cr_dsz = n;
|
||||
gettimeofday(&kshstate_v.cr_tv, NULL);
|
||||
h = oaathash_update(oaathash_update(h, (void *)&kshstate_v,
|
||||
sizeof(kshstate_v)), vp, n);
|
||||
kshstate_v.lcg_state_ = oaathash_finalise(h);
|
||||
|
||||
#if defined(arc4random_pushb_fast) || defined(MKSH_A4PB)
|
||||
/*
|
||||
* either we have very check entropy get and push available,
|
||||
* with malloc() pulling in this code already anyway, or the
|
||||
* user requested us to use the old functions
|
||||
*/
|
||||
#if defined(arc4random_pushb_fast)
|
||||
arc4random_pushb_fast(&kshstate_v.lcg_state_,
|
||||
sizeof(kshstate_v.lcg_state_));
|
||||
i = arc4random();
|
||||
#else
|
||||
i = arc4random_pushb(&kshstate_v.lcg_state_,
|
||||
sizeof(kshstate_v.lcg_state_));
|
||||
#endif
|
||||
h = oaathash_update(h, (void *)&i, sizeof(i));
|
||||
kshstate_v.lcg_state_ = oaathash_finalise(h);
|
||||
#endif
|
||||
}
|
||||
|
||||
/*
|
||||
* handle special variables with side effects - PATH, SECONDS.
|
||||
*/
|
||||
@ -1113,8 +1039,7 @@ getspec(struct tbl *vp)
|
||||
* this is the same Linear Congruential PRNG as Borland
|
||||
* C/C++ allegedly uses in its built-in rand() function
|
||||
*/
|
||||
i = ((kshstate_v.lcg_state_ =
|
||||
22695477 * kshstate_v.lcg_state_ + 1) >> 16) & 0x7FFF;
|
||||
i = ((lcg_state = 22695477 * lcg_state + 1) >> 16) & 0x7FFF;
|
||||
break;
|
||||
case V_HISTSIZE:
|
||||
i = histsize;
|
||||
@ -1181,17 +1106,17 @@ setspec(struct tbl *vp)
|
||||
stat(s, &statb) == 0 && S_ISDIR(statb.st_mode))
|
||||
strdupx(tmpdir, s, APERM);
|
||||
}
|
||||
break;
|
||||
return;
|
||||
#if HAVE_PERSISTENT_HISTORY
|
||||
case V_HISTFILE:
|
||||
sethistfile(str_val(vp));
|
||||
break;
|
||||
return;
|
||||
#endif
|
||||
case V_TMOUT:
|
||||
/* AT&T ksh seems to do this (only listen if integer) */
|
||||
if (vp->flag & INTEGER)
|
||||
ksh_tmout = vp->val.i >= 0 ? vp->val.i : 0;
|
||||
break;
|
||||
return;
|
||||
|
||||
/* common sub-cases */
|
||||
case V_OPTIND:
|
||||
@ -1232,7 +1157,7 @@ setspec(struct tbl *vp)
|
||||
* mksh R39d+ no longer has the traditional repeatability
|
||||
* of $RANDOM sequences, but always retains state
|
||||
*/
|
||||
change_random(&i, sizeof(i));
|
||||
rndset((long)i);
|
||||
break;
|
||||
case V_SECONDS:
|
||||
{
|
||||
@ -1476,12 +1401,42 @@ change_winsz(void)
|
||||
}
|
||||
|
||||
uint32_t
|
||||
evilhash(const char *s)
|
||||
hash(const void *s)
|
||||
{
|
||||
register uint32_t h = 0x100;
|
||||
register uint32_t h;
|
||||
|
||||
h = oaathash_update(h, (void *)&kshstate_f, sizeof(kshstate_f));
|
||||
kshstate_f.h = oaathash_full((const uint8_t *)s);
|
||||
return (oaathash_finalise(oaathash_update(h,
|
||||
(void *)&kshstate_f.h, sizeof(kshstate_f.h))));
|
||||
oaat1_init_impl(h);
|
||||
oaat1_addstr_impl(h, s);
|
||||
oaat1_fini_impl(h);
|
||||
return (h);
|
||||
}
|
||||
|
||||
void
|
||||
rndset(long v)
|
||||
{
|
||||
register uint32_t h;
|
||||
|
||||
oaat1_init_impl(h);
|
||||
oaat1_addmem_impl(h, &lcg_state, sizeof(lcg_state));
|
||||
oaat1_addmem_impl(h, &v, sizeof(v));
|
||||
|
||||
#if defined(arc4random_pushb_fast) || defined(MKSH_A4PB)
|
||||
/*
|
||||
* either we have very chap entropy get and push available,
|
||||
* with malloc() pulling in this code already anyway, or the
|
||||
* user requested us to use the old functions
|
||||
*/
|
||||
lcg_state = h;
|
||||
oaat1_fini_impl(lcg_state);
|
||||
#if defined(arc4random_pushb_fast)
|
||||
arc4random_pushb_fast(&lcg_state, sizeof(lcg_state));
|
||||
lcg_state = arc4random();
|
||||
#else
|
||||
lcg_state = arc4random_pushb(&lcg_state, sizeof(lcg_state));
|
||||
#endif
|
||||
oaat1_addmem_impl(h, &lcg_state, sizeof(lcg_state));
|
||||
#endif
|
||||
|
||||
oaat1_fini_impl(h);
|
||||
lcg_state = h;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user