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ad_linux.cpp
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/***************************************************************
BayCom(R) Packet-Radio fuer IBM PC
OpenBCM-Mailbox
-----------------------------------------
Betriebssystemabhaengige Teile fuer Linux
-----------------------------------------
Copyright (C) Florian Radlherr
Taubenbergstr. 32
83627 Warngau
Alle Rechte vorbehalten / All Rights Reserved
***************************************************************/
//19980329 OE3DZW added vendor-id
//19980614 OE3DZW dfree in kbytes
//19980909 OE3DZW added cpu-ticks to cpuinfo(), added rdtsc()
//20000613 DK2UI changed oshell for multi commands
#include <sys/ioctl.h>
#include <sys/vfs.h>
#include <fcntl.h>
#include <termios.h>
#include <crypt.h>
#include "baycom.h"
/*---------------------------------------------------------------------------*/
char *strupr (char *s)
//*************************************************************************
//
//*************************************************************************
{
/*
char tmp[300];
strcpy(tmp, s);
char *tmp2 = tmp;
if (tmp2)
{
while (*tmp2)
{
*tmp2 = toupper(*tmp2);
tmp2++;
}
}
return tmp2;
*/
if (s)
{
while (*s)
{
if (islower(*s))
*s = toupper(*s);
s++;
}
}
return s;
}
/*---------------------------------------------------------------------------*/
char *strlwr (char *s)
//*************************************************************************
//
//*************************************************************************
{
/*
char tmp[300];
int i;
strcpy(tmp, s);
if (s)
{
for (i = 0; i < 300; i++)
tmp[i] = tolower(tmp[i]);
}
return tmp;
*/
if (s)
{
while (*s)
{
if (isupper(*s))
*s = tolower(*s);
s++;
}
}
return s;
}
/*---------------------------------------------------------------------------*/
int bioskey (int mode)
//*************************************************************************
//
//*************************************************************************
{
return 0;
}
/*---------------------------------------------------------------------------*/
void cdhome (void)
//*************************************************************************
//
//*************************************************************************
{
chdir(globalpath);
}
/*---------------------------------------------------------------------------*/
long filelength (int fd)
//*************************************************************************
//
//*************************************************************************
{
long pos = lseek(fd, 0L, SEEK_CUR);
long len = lseek(fd, 0L, SEEK_END);
lseek(fd, pos, SEEK_SET);
return len;
}
/*---------------------------------------------------------------------------*/
int mkdir (char const *path)
//*************************************************************************
//
//*************************************************************************
{
return mkdir(path, 0777);
}
/*---------------------------------------------------------------------------*/
int random_max (int max)
//*************************************************************************
//
//*************************************************************************
/* from man page "rand" (Linux Programmers Manual":
In Numerical Recipes in C: The Art of Scientific Computing
(William H. Press, Brian P. Flannery, Saul A. Teukolsky,
William T. Vetterling; New York: Cambridge University
Press, 1990 (1st ed, p. 207)), the following comments are
made:
"If you want to generate a random integer between 1
and 10, you should always do it by
j=1+(int) (10.0*rand()/(RAND_MAX+1.0));
and never by anything resembling
j=1+((int) (1000000.0*rand()) % 10);
(which uses lower-order bits)."
Random-number generation is a complex topic. The Numeri
cal Recipes in C book (see reference above) provides an
excellent discussion of practical random-number generation
issues in Chapter 7 (Random Numbers).
*/
{
//return random()%max;
return (int) ((1.0 * max) * rand() / (RAND_MAX + 1.0));
}
/*---------------------------------------------------------------------------*/
int l2aufruf1 (int, int, int, char *)
//*************************************************************************
//
//*************************************************************************
{
return 0;
}
/*---------------------------------------------------------------------------*/
#ifdef oldpty
static int find_pty (char *ptyname) //ptyname = /dev/tty??
//*************************************************************************
//
//*************************************************************************
{
char master[80]; // master = /dev/pty??
int fdm, fds, num;
// tries to open pty, this should fail, then tries to open tty, this
// should succeed, then tries to open pty, this should succeed
// there seems to be a difference between kernel 2.0.0 and 2.0.27
for (num = 160; num > 0; num--)
{
sprintf(ptyname, "/dev/tty%c%x", 'q' + (num >> 4), num & 0xf);
if (1) // ((fds = open(ptyname, O_RDWR | O_NONBLOCK |O_EXCL)) < 0)
{
sprintf(master, "/dev/pty%c%x", 'q' + (num >> 4), num & 0xf);
if ((fdm = open(master, O_RDWR | O_NONBLOCK | O_EXCL)) >= 0)
{
if ((fds = open(ptyname, O_RDWR | O_NONBLOCK | O_EXCL)) >= 0)
{
//trace(report, "find_pty", "open %s", ptyname);
close(fds);
return fdm;
}
else close(fdm);
}
}
else close(fds);
}
trace(serious, "find_pty", "no pty found");
return EOF;
}
#endif
/*---------------------------------------------------------------------------*/
int oshell (char *name, shellinput_t input)
//*************************************************************************
//
// Shell to operating system
//
//*************************************************************************
{
int fd, ret;
char s[256], cl[LINELEN+1];
char c;
int wasdagewesen = 0;
int wasalife = 0;
struct termios termios_;
int childpid;
char ptyname[100];
time_t begintime = ad_time();
#ifdef oldpty
fd = find_pty(ptyname);
if (fd == EOF) return 1;
#else
if ((fd = open("/dev/ptmx", O_RDWR | O_NONBLOCK | O_EXCL)) >= 0)
{
grantpt(fd);
unlockpt(fd);
strcpy(ptyname, ptsname(fd));
// trace(report, "find_pty", "open %s", ptyname);
}
else
{
trace(serious, "find_pty", "no pty found");
return 1;
}
#endif
s_set(fd, ptyname, "lab");
signal(SIGCLD, SIG_IGN);
if (! (childpid = fork()))
{
int i,j;
static struct itimerval rttimer, old_rttimer;
memset(&rttimer, 0, sizeof(struct itimerval));
setitimer(ITIMER_REAL, &rttimer, &old_rttimer);
signal(SIGCLD, SIG_IGN);
setpgrp();
setsid();
for (i = 0; i < FD_SETSIZE; i++) close(i);
fd = open(ptyname, O_RDWR, 0666);
dup(0); // duplicate an open file descriptor
dup(0);
//chmod(ptyname, 0622);
j = ioctl(0, TIOCSCTTY, (char *) 0);
//trace(report, "oshell", "j = %d",j);
memset((char *) &termios_, 0, sizeof(struct termios));
termios_.c_iflag = ICRNL | IXOFF;
termios_.c_oflag = OPOST | ONLCR;
termios_.c_cflag = CS8 | CREAD | CLOCAL;
termios_.c_lflag = ISIG | ICANON | ECHO;
termios_.c_cc[VINTR] = 3; /* ^C */
termios_.c_cc[VSUSP] = 26; /* ^Z */
termios_.c_cc[VQUIT] = 28; /* ^\ */
termios_.c_cc[VERASE] = 8; /* ^H */
termios_.c_cc[VKILL] = 24; /* ^X */
termios_.c_cc[VEOF] = 4; /* ^D */
cfsetispeed(&termios_, B1200);
cfsetospeed(&termios_, B1200);
tcsetattr(fd, TCSANOW, &termios_);
tcsetpgrp(fd, getpgrp());
if (! *name)
{
printf("Type `exit' or ctrl-d to return to " STD_BOXHEADER "...\n");
execl("/bin/bash", "-bash", NULL);
}
else
{
char cmd[200];
if (file_isreg("bashrc.bcm"))
sprintf(cmd, "source bashrc.bcm;%s", name);
else
strcpy(cmd, name);
execl("/bin/bash", "bash", "-c", cmd, NULL);
}
perror("execlp");
exit(0); // sollte nie aufgerufen werden
}
t->childpid = childpid;
while (fd != EOF)
{
while ((ret = read(fd, &c, 1)) > 0)
{
wasalife = 1;
wasdagewesen = 1;
putv(c);
}
if (ret < 0)
{
if (((ad_time() > (begintime + 2)) || wasalife) && errno != EAGAIN)
{
s_close(fd);
break;
}
}
else wasalife = 1;
if (wasdagewesen)
{
putflush();
wasdagewesen = 0;
}
if (! *name || input == sh_interactive)
// if(input==sh_ifmultitask || input==sh_forceinput)
{
while (getvalid() && fd != EOF)
{
getline(s, sizeof(s) - 2, 1);
if (*s != 4 && ! *name)
{
sprintf(cl, "oshell \"%.70s\"", s);
cmdlog(cl);
lastcmd(cl);
}
strcat(s, "\n");
if (fd != EOF)
{
if (write(fd, s, strlen(s)) != (long) strlen(s))
{
s_close(fd);
fd = EOF;
}
}
}
}
wdelay(133);
}
putflush();
kill(-childpid, 9);
t->childpid = 0;
return 0;
}
/*---------------------------------------------------------------------------*/
void resetreadonly (char *name)
//*************************************************************************
//
// dummy, only valid for DOS
//
//*************************************************************************
{
}
/*---------------------------------------------------------------------------*/
unsigned long dfree (char *path,int total)
//*************************************************************************
//
// returns available space in kbytes (max. 4 TBytes)
//
//*************************************************************************
{
struct statfs s;
long kblock;
statfs(path, &s);
if (total) kblock = s.f_blocks >> 10;
else kblock = s.f_bavail >> 10; // f_bfree would be correct for "root"
return s.f_bsize * kblock;
}
/*---------------------------------------------------------------------------*/
char *memfree (int swap)
//*************************************************************************
//
// ermittelt aus /proc/meminfo den...
// bei swap = 0 ... freien Arbeitsspeicher
// bei swap = 1 ... freien Swap-Speicher
//
//*************************************************************************
{
FILE *f;
char buf[100], b1[20], b2[20], b3[20], b4[20], b5[20], b6[20];
char swaptotal[20], swapfree[20], memfree[20], buffer[20], cached[20];
static char memresult[20], swapresult[20];
/* altes Format bis Kernel 2.6.x:
total: used: free: shared: buffers: cached:
Mem: 394739712 370683904 24055808 0 30818304 201142272
Swap: 320745472 9101312 311644160
MemTotal: 385488 kB
MemFree: 23492 kB
MemShared: 0 kB
Buffers: 30096 kB
Cached: 190644 kB
SwapCached: 5784 kB
Active: 110084 kB
Inactive: 212676 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 385488 kB
LowFree: 23492 kB
SwapTotal: 313228 kB
SwapFree: 304340 kB
BigFree: 0 kB
neues Format ab Kernel 2.6.x:
MemTotal: 255396 kB
MemFree: 28776 kB
Buffers: 18324 kB
Cached: 114140 kB
SwapCached: 0 kB
Active: 136928 kB
Inactive: 68876 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 255396 kB
LowFree: 28776 kB
SwapTotal: 538168 kB
SwapFree: 538168 kB
Dirty: 384 kB
Writeback: 0 kB
Mapped: 97204 kB
Slab: 15856 kB
Committed_AS: 161592 kB
PageTables: 1232 kB
VmallocTotal: 770040 kB
VmallocUsed: 2440 kB
VmallocChunk: 767188 kB
HugePages_Total: 0
HugePages_Free: 0
Hugepagesize: 4096 kB
*/
strcpy(cached, "0");
strcpy(swapresult, "-");
strcpy(memresult, "-");
f = s_fopen("/proc/meminfo", "srt");
if (f)
{
fgets(buf, sizeof(buf)-1, f); // try find headerline old format
if (sscanf(buf, "%s %s %s %s %s %s", b1, b2, b3, b4, b5, b6) == 6)
{
fgets(buf, sizeof(buf)-1, f); // read memory
if (sscanf(buf, "%s %s %s %s %s %s %s", b1, b2, b3, memfree,
b4, buffer, cached) >= 6)
sprintf(memresult, "%lu", (atol(memfree) + atoi(buffer)
+ atoi(cached)) >> 10);
fgets(buf, sizeof(buf)-1, f); // read swap
if (sscanf(buf, "%s %s %s", b1, b2, b3) == 3)
sprintf(swapresult, "%lu", atol(b3) >> 10);
}
else // no headerline means new format
{
while (! feof(f))
{
if (sscanf(buf, "%s %s %s", b1, b2, b3) == 3)
{
if (! strcmp(b1, "SwapTotal:")) strcpy(swaptotal,b2);
if (! strcmp(b1, "SwapFree:")) strcpy(swapfree, b2);
if (! strcmp(b1, "MemFree:")) strcpy(memfree, b2);
if (! strcmp(b1, "Buffers:")) strcpy(buffer, b2);
if (! strcmp(b1, "Cached:")) strcpy(cached, b2);
}
fgets(buf, sizeof(buf)-1, f); // read next line
}
sprintf(memresult, "%lu",
((atol(memfree) + atol(buffer) + atol(cached)) * 1024) >> 10);
sprintf(swapresult, "%lu",
((atol(swaptotal) - atol(swapfree)) * 1024) >> 10);
}
s_fclose(f);
}
if (swap) return swapresult;
else return memresult;
}
/*---------------------------------------------------------------------------*/
/* Source:
Linux I/O port programming mini-HOWTO
Author: Riku Saikkonen <[email protected]>
Last modified: Mar 30 1997
*/
//Other Processors do not support i386 Assembler -F1ULQ
#ifndef __sparc__
extern __inline__ unsigned long long int rdtsc()
{
unsigned long long int x;
__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
return x;
}
#endif
/*---------------------------------------------------------------------------*/
char *cpuinfo (void)
//*************************************************************************
//
// CPU-Infos vom Betriebssystem holen
//
//*************************************************************************
{
FILE *f;
char buf[100], cpu[20], bogo[20];
char vendor[30];
int tsc = NO;
static char cpuresult[200];
char *pk;
pk = NULL;
strcpy(cpu, "??");
strcpy(bogo, "??");
strcpy(vendor, "");
strcpy(cpuresult, "-");
f = s_fopen("/proc/cpuinfo", "srt");
if (f)
{
while (fgets(buf, sizeof(buf) - 1, f))
{
if (stristr(buf, "cpu"))
{
pk = strstr(buf, ": ");
if (pk && *cpu == '?') sscanf(pk + 2, "%s", cpu);
}
if (stristr(buf, "BogoMips"))
{
pk = strstr(buf, ": ");
if (pk) sscanf(pk + 2, "%s", bogo);
}
if (stristr(buf, "vendor_id"))
{
pk = strstr(buf, ": ");
if (pk) sscanf(pk + 2, "%s", vendor);
}
if (stristr(buf, "flags"))
{
pk = strstr(buf, ": ");
if (pk) tsc = strstr(buf, "tsc") ? OK : NO;
}
}
s_fclose(f);
#ifdef __i386__ //rdtsc() is i386 specific
if (*vendor) //only newer cpus show infos
{
if (*cpu >= '5' && tsc)
sprintf(cpuresult, "CPU: %s(%s) %lld ticks BogoMips: %s",
cpu, vendor, rdtsc(), bogo);
else sprintf(cpuresult, "CPU: %s(%s) BogoMips: %s", cpu, vendor, bogo);
}
else
#endif
sprintf(cpuresult, "CPU: %s BogoMips: %s", cpu, bogo);
}
return cpuresult;
}
/*---------------------------------------------------------------------------*/
void testcputask (void)
//*************************************************************************
//
//*************************************************************************
//dummy
{
}
/*---------------------------------------------------------------------------*/
void task_idle (int active)
//*************************************************************************
//
//*************************************************************************
{
// static long lasttic = 0;
// int i;
if (active == 0) pause();
// if (i == 10 && systic != lasttic)
// {
// i = 0;
// call_l2(active == 2);
// lasttic = systic;
// }
// else
// {
// i++;
call_l2(active == 2);
// }
}
/*---------------------------------------------------------------------------*/
void coldstart (void)
//*************************************************************************
//
//*************************************************************************
{
strcpy(stopreason, "WATCHDOG");
exit(1);
}
/*---------------------------------------------------------------------------*/
int setlinuxpasswd (char *calltmp, char *passwort)
//*************************************************************************
//
// Legt einen neuen System-User in /etc/passwd bzw. /etc/shadow an
// Existiert der User schon, wird das Passwort neu gesetzt
// Rueckgabewerte: 0 Abbruch, es wurde nichts gemacht
// 1 User wurde angelegt
// 2 User existiert, Passwort neu gesetzt
//*************************************************************************
{
#ifndef LINUXSYSTEMUSER
return 0;
#else
#define PASSWDFILE "/etc/passwd"
#define SPASSWDFILE "/etc/shadow"
#define SPASSWDTMPFILE "/etc/shadow.$$$"
#define MAXUID 32000
char homedirparent[80];
char homedir[80];
char Homedir[80];
char Shell[80];
int Gid = 400;
unsigned int Maxuid = MAXUID;
unsigned int Minuid = 800;
static char bitmap[MAXUID + 1];
struct passwd *pw;
struct passwd *pwexist;
struct stat statbuf;
FILE *fp = 0, *ft = 0;
int secured = 0;
unsigned int uid;
char salt[3];
char name[20];
char s[301];
char call[CALLEN+1];
strcpy(name, "setlinuxpasswd");
strcpy(Shell, "/bin/false");
strcpy(Homedir, "/home/ax25");
strcpy(call, calltmp); // nicht mit calltmp arbeiten!
strlwr(call);
if (! *passwort)
return 0;
// Search existing passwd entry and change password
if ((pwexist = getpwnam(call)))
{
xunlink(SPASSWDTMPFILE);
if (! (fp = s_fopen(SPASSWDFILE, "srb"))) return 0;
if (! (ft = s_fopen(SPASSWDTMPFILE, "swb"))) return 0;
while (fgets(s, 300, fp))
{
if (strstr(s, call))
{
//hier ist der user
salt[0] = passwort[0];
salt[1] = passwort[1];
salt[2] = 0;
fprintf(ft, "%s:%s:%d:0:::::\n", call,
crypt(passwort, salt), pwexist->pw_uid);
}
else
{
fprintf(ft, "%s", s);
}
}
s_fclose(fp);
s_fclose(ft);
xrename(SPASSWDTMPFILE, SPASSWDFILE);
xunlink(SPASSWDTMPFILE);
trace(report, name, "linux login changed for %s", call);
return 2; //User existiert bereits
}
// Find free user id
memset(bitmap, 0, sizeof(bitmap));
while ((pw = getpwent()))
{
if (! strcmp(call, pw->pw_name)) break;
if (pw->pw_uid <= Maxuid) bitmap[pw->pw_uid] = 1;
}
endpwent();
if (pw)
{
return 0;
}
for (uid = Minuid; uid <= Maxuid && bitmap[uid]; uid++) ;
if (uid > Maxuid) return 0;
// Add user to passwd file(s)
sprintf(homedirparent, "%s/%.3s...", Homedir, call);
sprintf(homedir, "%s/%s", homedirparent, call);
if ( *SPASSWDFILE
&& ! stat(SPASSWDFILE, &statbuf)
&& (fp = s_fopen(SPASSWDFILE, "sab")))
{
salt[0] = passwort[0];
salt[1] = passwort[1];
salt[2] = 0;
/* Definition einer /etc/shadow Zeile
dgt123:ðHJhpnm5X3kQ:804:0:99999:7:::
^- usercall
^- password (crypted)
^- days since Jan 1, 1970 that password was
last changed
^- days before password may be changed
^- days after which password must be changed
^- days before password is to expire
that user is warned
^- days after password expires that
account is disabled
^- days since Jan 1, 1970 that
account is disabled
^- reserved field
*/
fprintf(fp, "%s:%s:%d:0:::::\n", call, crypt(passwort, salt), uid);
s_fclose(fp);
secured = 1;
}
if (! (fp = s_fopen(PASSWDFILE, "sab"))) return 0;
fprintf(fp, "%s:%s:%d:%d:AX25 %s:%s:%s\n", call, secured ? "x" : "",
uid, Gid, call, homedir, Shell);
s_fclose(fp);
pw = getpwuid(uid);
// Create home directory
mkdir(Homedir, 0755);
mkdir(homedirparent, 0755);
mkdir(homedir, 0755);
chown(homedir, uid, Gid);
trace(report, name, "linux login created for %s", call);
return 1;
#endif
}