/*
* This file has been modified for the cdrkit suite.
*
* The behaviour and appearence of the program code below can differ to a major
* extent from the version distributed by the original author(s).
*
* For details, see Changelog file distributed with the cdrkit package. If you
* received this file from another source then ask the distributing person for
* a log of modifications.
*
*/
/* @(#)scsi-unixware.c 1.36 04/01/15 Copyright 1998 J. Schilling, Santa Cruz Operation */
/*
* Interface for the SCO UnixWare SCSI implementation.
*
* Warning: you may change this source, but if you do that
* you need to change the _usal_version and _usal_auth* string below.
* You may not return "schily" for an SCG_AUTHOR request anymore.
* Choose your name instead of "schily" and make clear that the version
* string is related to a modified source.
*
* Copyright (c) 1998 J. Schilling, Santa Cruz Operation
*/
/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#undef sense
#undef SC_PARITY
#undef scb
#include <sys/sysmacros.h> /* XXX Falsch, richtig -> sys/mkdev.h */
#include <sys/scsi.h>
#include <sys/sdi_edt.h>
#include <sys/sdi.h>
/*
* Warning: you may change this source, but if you do that
* you need to change the _usal_version and _usal_auth* string below.
* You may not return "schily" for an SCG_AUTHOR request anymore.
* Choose your name instead of "schily" and make clear that the version
* string is related to a modified source.
*/
static char _usal_trans_version[] = "scsi-unixware.c-1.36"; /* The version for this transport*/
/* Max. number of usal scsibusses. The real limit would be */
/* MAX_HBA * MAX_BUS (which would be 32 * 8 on UnixWare 2.1/7.x), */
/* but given that we will hardly see such a beast, lets take 32 */
#define MAX_SCG 32
/* maximum defines for UnixWare 2.x/7.x from <sys/sdi_edt.h> */
#define MAX_TGT MAX_EXTCS /* Max # of target id's */
#define MAX_LUN MAX_EXLUS /* Max # of lun's */
#define MAX_DMA (32*1024)
#ifdef __WHAT_TODO__
#define MAX_DMA (16*1024) /* On UnixWare 2.1.x w/ AHA2940 HBA */
/* the max DMA size is 16KB. */
#endif
#define MAXLINE 80
#define MAXPATH 256
#define DEV_DIR "/tmp"
#define DEV_NAME "usal.s%1dt%1dl%1d"
#define SCAN_HBA "%d:%d,%d,%d:%7s : %n"
#define SCAN_DEV "%d,%d,%d:%7s : %n"
#define PRIM_HBA "/dev/hba/hba1"
#define SCSI_CFG "LC_ALL=C /etc/scsi/pdiconfig -l"
#define SCAN_ALL "LIBSCG_SCAN_ALL"
#define SDI_VALID 0x01 /* Entry may be used (non disk) */
#define SDI_ATAPI 0x02 /* Connected via IDE HBA */
#define SDI_INITIATOR 0x04 /* This is the initiator target ID */
typedef struct usal2sdi {
short open;
short flags;
short fd;
char hba;
char bus;
char tgt;
char lun;
dev_t node;
dev_t major;
dev_t minor;
/*#define SCG_DEBUG*/
#ifdef SCG_DEBUG
char type[20];
char vend[40];
char devn[32];
#endif
} usal2sdi_t;
static usal2sdi_t sdidevs [MAX_SCG][MAX_TGT][MAX_LUN];
static BOOL sdiinit = FALSE;
struct usal_local {
short usalfiles[MAX_SCG][MAX_TGT][MAX_LUN];
};
#define usallocal(p) ((struct usal_local *)((p)->local))
static int unixware_init(SCSI *usalp);
static int do_usal_cmd(SCSI *usalp, struct usal_cmd *sp);
static int do_usal_sense(SCSI *usalp, struct usal_cmd *sp);
static FILE *xpopen(char *cmd, char *type);
static int xpclose(FILE *f);
/*
* -------------------------------------------------------------------------
* SCO UnixWare 2.1.x / UnixWare 7 provides a scsi pass-through mechanism,
* which can be used to access any configured scsi device.
*
* NOTE: The libusal UnixWare passthrough routines have changed with
* cdrecord-1.8 to enable the -scanbus, -load, -eject option
* regardless of the status of media and the addressing
* scheme is now the same as used on many other platforms like
* Solaris, Linux etc.
*
* ===============================================================
* RUN 'cdrecord -scanbus' TO SEE THE DEVICE ADDRESSES YOU CAN USE
* ===============================================================
*/
/*
* Return version information for the low level SCSI transport code.
* This has been introduced to make it easier to trace down problems
* in applications.
*
*/
static char *
usalo_version(SCSI *usalp, int what)
{
if (usalp != (SCSI *)0) {
switch (what) {
case SCG_VERSION:
return (_usal_trans_version);
/*
* If you changed this source, you are not allowed to
* return "schily" for the SCG_AUTHOR request.
*/
case SCG_AUTHOR:
return (_usal_auth_cdrkit);
case SCG_SCCS_ID:
return (__sccsid);
}
}
return ((char *)0);
}
static int
usalo_help(SCSI *usalp, FILE *f)
{
__usal_help(f, "SDI_SEND", "Generic SCSI",
"", "bus,target,lun", "1,2,0", TRUE, FALSE);
return (0);
}
/*
* ---------------------------------------------------------------
* This routine is introduced to create all device nodes necessary
* to access any detected scsi device. It parses the output of
* /etc/scsi/pdiconfig -l and creates passthru device node for each
* found scsi device apart from the listed hba's.
*
*/
static int
unixware_init(SCSI *usalp)
{
FILE *cmd;
int hba = 0, bus = 0, usal = 0, tgt = 0, lun = 0;
int nusal = -1, lhba = -1, lbus = 0;
int atapi, fd, nopen = 0, pos = 0, len = 0;
int s, t, l;
int scan_disks;
char lines[MAXLINE];
char class[MAXLINE];
char ident[MAXLINE];
char devnm[MAXPATH];
char dname[MAXPATH];
struct stat stbuf;
dev_t ptdev, major, minor, node;
char **evsave;
extern char **environ;
/* Check for validity of primary hostbus adapter node */
if (stat(PRIM_HBA, &stbuf) < 0) {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Can not stat() primary hba (%s)",
PRIM_HBA);
return (-1);
}
if (!S_ISCHR(stbuf.st_mode)) {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Primary hba (%s) not a character device",
PRIM_HBA);
return (-1);
}
major = getmajor(stbuf.st_rdev);
/*
* Check whether we want to scan all devices
*/
if (getenv(SCAN_ALL) != NULL) {
scan_disks = 1;
} else {
scan_disks = 0;
}
/* read pdiconfig output and get all attached scsi devices ! */
evsave = environ;
environ = 0;
if ((cmd = xpopen(SCSI_CFG, "r")) == NULL) {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Error popen() for \"%s\"",
SCSI_CFG);
environ = evsave;
return (-1);
}
environ = evsave;
for (;;) {
if (fgets(lines, MAXLINE, cmd) == NULL)
break;
memset(class, '\0', sizeof (class));
memset(ident, '\0', sizeof (ident));
if (lines[0] == ' ') {
sscanf(lines, SCAN_DEV, &bus, &tgt, &lun, class, &pos);
hba = lhba;
} else {
sscanf(lines, SCAN_HBA, &hba, &bus, &tgt, &lun, class, &pos);
nusal++;
lhba = hba;
atapi = 0;
}
/* We can't sscanf() the ident string of the device */
/* as it may contain characters sscanf() will */
/* recognize as a delimiter. So do a strcpy() instead ! */
len = strlen(lines) - pos - 1; /* don't copy the '\n' */
strncpy(ident, &lines[pos], len);
if (usalp->debug > 0) {
fprintf((FILE *)usalp->errfile,
"SDI -> %d:%d,%d,%d: %-7s : %s\n",
hba, bus, tgt, lun, class, ident);
}
if (bus != lbus) {
nusal++;
lbus = bus;
}
usal = nusal;
/* check whether we have a HBA or a SCSI device, don't */
/* let HBA's be valid device for cdrecord, but mark */
/* them as a controller (initiator = 1). */
/* Don't detect disks, opening a mounted disk can hang */
/* the disk subsystem !!! So unless we set an */
/* environment variable LIBSCG_SCAN_ALL, we will ignore */
/* disks */
if (strstr(class, "HBA") == NULL) {
if (strstr(class, "DISK") != NULL) {
if (scan_disks)
sdidevs[usal][tgt][lun].flags |= SDI_VALID;
else
sdidevs[usal][tgt][lun].flags &= ~SDI_VALID;
} else {
sdidevs[usal][tgt][lun].flags |= SDI_VALID;
}
} else {
sdidevs[usal][tgt][lun].flags |= SDI_INITIATOR;
}
/* There is no real flag that shows a HBA as an ATAPI */
/* controller, so as we know the driver is called 'ide' */
/* we can check the ident string for the occurence of it*/
if (strstr(ident, "(ide,") != NULL) {
atapi = 1;
}
/*
* Fill the sdidevs array with all we know now.
* Do not overwrite fields that may contain old state like
* sdidevs[usal][tgt][lun].open
*/
if (atapi)
sdidevs[usal][tgt][lun].flags |= SDI_ATAPI;
else
sdidevs[usal][tgt][lun].flags &= ~SDI_ATAPI;
sdidevs[usal][tgt][lun].hba = hba;
sdidevs[usal][tgt][lun].bus = bus;
sdidevs[usal][tgt][lun].tgt = tgt;
sdidevs[usal][tgt][lun].lun = lun;
#ifdef SCG_DEBUG
strcpy(sdidevs[usal][tgt][lun].type, class);
strcpy(sdidevs[usal][tgt][lun].vend, ident);
snprintf(sdidevs[usal][tgt][lun].devn,
sizeof (sdidevs[usal][tgt][lun].devn),
DEV_NAME, usal, tgt, lun);
#endif
snprintf(devnm, sizeof (devnm),
DEV_NAME, usal, tgt, lun);
minor = SDI_MINOR(hba, tgt, lun, bus);
node = makedevice(major, minor);
sdidevs[usal][tgt][lun].major = major;
sdidevs[usal][tgt][lun].minor = minor;
sdidevs[usal][tgt][lun].node = node;
if (usalp->debug > 0) {
fprintf((FILE *)usalp->errfile,
"h = %d; b = %d, s = %d, t = %d, l = %d, a = %d, ma = %d, mi = %2d, dev = '%s', id = '%s'\n",
hba, bus, usal, tgt, lun,
(sdidevs[usal][tgt][lun].flags & SDI_ATAPI) != 0,
sdidevs[usal][tgt][lun].major,
sdidevs[usal][tgt][lun].minor,
devnm,
ident);
}
}
if (xpclose(cmd) == -1) {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Error pclose() for \"%s\"",
SCSI_CFG);
return (-1);
}
/* create all temporary device nodes */
for (s = 0; s < MAX_SCG; s++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++) {
if ((sdidevs[s][t][l].flags & SDI_VALID) == 0) {
if (sdidevs[s][t][l].fd >= 0) {
close(sdidevs[s][t][l].fd);
}
sdidevs[s][t][l].fd = -1;
sdidevs[s][t][l].open = 0;
continue;
}
/* Make pass-through interface device node */
snprintf(devnm,
sizeof (devnm),
DEV_NAME, s, t, l);
snprintf(dname, sizeof (dname),
"%s/%s", DEV_DIR, devnm);
ptdev = sdidevs[s][t][l].node;
if (mknod(dname, S_IFCHR | 0700, ptdev) < 0) {
if (errno == EEXIST) {
unlink(dname);
if (mknod(dname, S_IFCHR | 0700, ptdev) < 0) {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"mknod() error for \"%s\"", dname);
return (-1);
}
} else {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"mknod() error for \"%s\"", dname);
return (-1);
}
}
/* Open pass-through device node */
if ((fd = open(dname, O_RDONLY)) < 0) {
if (errno == EBUSY && sdidevs[s][t][l].open > 0) {
/*
* Device has already been opened, just
* return the saved file desc.
*/
fd = sdidevs[s][t][l].fd;
} else {
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"can not open pass-through %s", dname);
return (-1);
}
}
/*
* If for whatever reason we may open a pass through
* device more than once, this will waste fs's as we
* do not check for sdidevs[s][t][l].fd == -1.
*/
sdidevs[s][t][l].fd = fd;
sdidevs[s][t][l].open++;
nopen++;
usallocal(usalp)->usalfiles[s][t][l] = (short) fd;
if (usalp->debug > 0) {
fprintf((FILE *)usalp->errfile,
"s = %d, t = %d, l = %d, dev = %s, fd = %d\n",
s, t, l,
devnm,
sdidevs[s][t][l].fd);
}
}
}
}
return (nopen);
}
static int
usalo_open(SCSI *usalp, char *device)
{
int busno = usal_scsibus(usalp);
int tgt = usal_target(usalp);
int tlun = usal_lun(usalp);
int b, t, l;
if (busno >= MAX_SCG || tgt >= MAX_TGT || tlun >= MAX_LUN) {
errno = EINVAL;
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Illegal value for busno, target or lun '%d,%d,%d'",
busno, tgt, tlun);
return (-1);
}
if (usalp->local == NULL) {
usalp->local = malloc(sizeof (struct usal_local));
if (usalp->local == NULL)
return (0);
for (b = 0; b < MAX_SCG; b++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++)
usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
}
}
}
if (!sdiinit) {
sdiinit = TRUE;
memset(sdidevs, 0, sizeof (sdidevs)); /* init tmp_structure */
for (b = 0; b < MAX_SCG; b++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++) {
sdidevs[b][t][l].flags = 0;
sdidevs[b][t][l].fd = -1;
sdidevs[b][t][l].open = 0;
}
}
}
}
if (*device != '\0') { /* we don't allow old dev usage */
errno = EINVAL;
if (usalp->errstr)
snprintf(usalp->errstr, SCSI_ERRSTR_SIZE,
"Open by 'devname' no longer supported on this OS");
return (-1);
} else { /* this is the new stuff */
/* it will do the initialisation */
/* and return the number of */
/* detected devices to be used */
/* with the new addressing */
/* scheme. */
return (unixware_init(usalp));
}
}
static int
usalo_close(SCSI *usalp)
{
register int f;
register int b;
register int t;
register int l;
if (usalp->local == NULL)
return (-1);
for (b = 0; b < MAX_SCG; b++) {
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++) {
f = usallocal(usalp)->usalfiles[b][t][l];
if (f >= 0) {
if (sdidevs[b][t][l].open > 0)
sdidevs[b][t][l].open--;
if (sdidevs[b][t][l].open <= 0) {
if (sdidevs[b][t][l].fd >= 0)
close(sdidevs[b][t][l].fd);
sdidevs[b][t][l].fd = -1;
sdidevs[b][t][l].flags &= ~SDI_VALID;
}
}
usallocal(usalp)->usalfiles[b][t][l] = (short)-1;
}
}
}
return (0);
}
static long
usalo_maxdma(SCSI *usalp, long amt)
{
return (MAX_DMA);
}
static void *
usalo_getbuf(SCSI *usalp, long amt)
{
if (usalp->debug > 0) {
fprintf((FILE *)usalp->errfile,
"usalo_getbuf: %ld bytes\n", amt);
}
usalp->bufbase = (void *) valloc((size_t)(amt));
return (usalp->bufbase);
}
static void
usalo_freebuf(SCSI *usalp)
{
if (usalp->bufbase)
free(usalp->bufbase);
usalp->bufbase = NULL;
}
static BOOL
usalo_havebus(SCSI *usalp, int busno)
{
register int t;
register int l;
if (busno < 0 || busno >= MAX_SCG)
return (FALSE);
if (usalp->local == NULL)
return (FALSE);
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++)
if (usallocal(usalp)->usalfiles[busno][t][l] >= 0)
return (TRUE);
}
return (FALSE);
}
static int
usalo_fileno(SCSI *usalp, int busno, int tgt, int tlun)
{
if (busno < 0 || busno >= MAX_SCG ||
tgt < 0 || tgt >= MAX_TGT ||
tlun < 0 || tlun >= MAX_LUN)
return (-1);
if (usalp->local == NULL)
return (-1);
return ((int)usallocal(usalp)->usalfiles[busno][tgt][tlun]);
}
static int
usalo_initiator_id(SCSI *usalp)
{
register int t;
register int l;
register int busno;
busno = usal_scsibus(usalp);
if (busno < 0 || busno >= MAX_SCG)
return (FALSE);
for (t = 0; t < MAX_TGT; t++) {
for (l = 0; l < MAX_LUN; l++)
if ((sdidevs[busno][t][l].flags & SDI_INITIATOR) != 0) {
if (usalp->debug > 0) {
fprintf((FILE *)usalp->errfile,
"usalo_initiator_id: id = %d\n", t);
}
return (t);
}
}
return (-1);
}
static int
usalo_isatapi(SCSI *usalp)
{
/* if the new address method is used we know if this is ATAPI */
return ((sdidevs[usal_scsibus(usalp)][usal_target(usalp)][usal_lun(usalp)].flags & SDI_ATAPI) != 0);
}
static int
usalo_reset(SCSI *usalp, int what)
{
int f = usalp->fd;
errno = EINVAL;
#if defined(SDI_TRESET) || defined(SDI_BRESET)
if (what == SCG_RESET_NOP) {
errno = 0;
return (0);
}
#ifdef SDI_TRESET
if (what == SCG_RESET_TGT) {
errno = 0;
if (ioctl(f, SDI_TRESET, 0) >= 0)
return (0);
}
#endif
#ifdef SDI_BRESET
if (what == SCG_RESET_BUS) {
errno = 0;
if (ioctl(f, SDI_BRESET, 0) >= 0)
return (0);
}
#endif
#endif /* defined(SDI_TRESET) || defined(SDI_BRESET) */
return (-1);
}
static int
do_usal_cmd(SCSI *usalp, struct usal_cmd *sp)
{
int ret;
int i;
struct sb scsi_cmd;
struct scb *scbp;
memset(&scsi_cmd, 0, sizeof (scsi_cmd));
scsi_cmd.sb_type = ISCB_TYPE;
scbp = &scsi_cmd.SCB;
scbp->sc_cmdpt = (caddr_t) sp->cdb.cmd_cdb;
scbp->sc_cmdsz = sp->cdb_len;
scbp->sc_datapt = sp->addr;
scbp->sc_datasz = sp->size;
if (!(sp->flags & SCG_RECV_DATA) && (sp->size > 0))
scbp->sc_mode = SCB_WRITE;
else
scbp->sc_mode = SCB_READ;
scbp->sc_time = sp->timeout;
sp->error = SCG_NO_ERROR;
errno = 0;
for (;;) {
if ((ret = ioctl(usalp->fd, SDI_SEND, &scsi_cmd)) < 0) {
if (errno == EAGAIN) {
sleep(1);
errno = 0;
continue;
}
sp->ux_errno = errno;
if (errno == 0)
sp->ux_errno = EIO;
sp->error = SCG_RETRYABLE;
#ifdef __needed__
if (errno == ENOTTY || errno == EINVAL ||
errno == EACCES) {
return (-1);
}
#endif
return (ret);
}
break;
}
sp->ux_errno = errno;
sp->resid = scbp->sc_resid;
memset(&sp->u_scb.Scb, 0, sizeof (sp->u_scb.Scb));
sp->u_scb.cmd_scb[0] = scbp->sc_status;
if (sp->u_scb.cmd_scb[0] & 0x02) {
if (sp->ux_errno == 0)
sp->ux_errno = EIO;
}
switch (scbp->sc_comp_code) {
case SDI_ASW : /* Job completed normally */
case SDI_LINKF0 : /* Linked command done without flag */
case SDI_LINKF1 : /* Linked command done with flag */
sp->error = SCG_NO_ERROR;
break;
case SDI_CKSTAT : /* Check the status byte */
sp->error = SCG_NO_ERROR;
break;
case SDI_NOALLOC : /* This block is not allocated */
case SDI_NOTEQ : /* Addressed device not present */
case SDI_OOS : /* Device is out of service */
case SDI_NOSELE : /* The SCSI bus select failed */
case SDI_SBRESC : /* SCSI bus reservation conflict */
sp->error = SCG_FATAL;
if (sp->ux_errno == 0)
sp->ux_errno = EIO;
break;
case SDI_QFLUSH : /* Job was flushed */
case SDI_ABORT : /* Command was aborted */
case SDI_RESET : /* Reset was detected on the bus */
case SDI_CRESET : /* Reset was caused by this unit */
case SDI_V2PERR : /* vtop failed */
case SDI_HAERR : /* Host adapter error */
case SDI_MEMERR : /* Memory fault */
case SDI_SBUSER : /* SCSI bus error */
case SDI_SCBERR : /* SCB error */
case SDI_MISMAT : /* parameter mismatch */
case SDI_PROGRES : /* Job in progress */
case SDI_UNUSED : /* Job not in use */
case SDI_ONEIC : /* More than one immediate request */
case SDI_SFBERR : /* SFB error */
case SDI_TCERR : /* Target protocol error detected */
default:
sp->error = SCG_RETRYABLE;
if (sp->ux_errno == 0)
sp->ux_errno = EIO;
break;
case SDI_TIME : /* Job timed out */
case SDI_TIME_NOABORT : /* Job timed out, but could not be aborted */
sp->error = SCG_TIMEOUT;
if (sp->ux_errno == 0)
sp->ux_errno = EIO;
break;
}
return (0);
}
static int
do_usal_sense(SCSI *usalp, struct usal_cmd *sp)
{
int ret;
struct usal_cmd s_cmd;
memset((caddr_t)&s_cmd, 0, sizeof (s_cmd));
s_cmd.addr = (caddr_t) sp->u_sense.cmd_sense;
s_cmd.size = sp->sense_len;
s_cmd.flags = SCG_RECV_DATA|SCG_DISRE_ENA;
s_cmd.cdb_len = SC_G0_CDBLEN;
s_cmd.sense_len = CCS_SENSE_LEN;
s_cmd.cdb.g0_cdb.cmd = SC_REQUEST_SENSE;
s_cmd.cdb.g0_cdb.lun = sp->cdb.g0_cdb.lun;
s_cmd.cdb.g0_cdb.count = sp->sense_len;
ret = do_usal_cmd(usalp, &s_cmd);
if (ret < 0)
return (ret);
sp->sense_count = sp->sense_len - s_cmd.resid;
return (ret);
}
static int
usalo_send(SCSI *usalp)
{
struct usal_cmd *sp = usalp->scmd;
int ret;
if (usalp->fd < 0) {
sp->error = SCG_FATAL;
return (0);
}
ret = do_usal_cmd(usalp, sp);
if (ret < 0)
return (ret);
if (sp->u_scb.cmd_scb[0] & S_CKCON)
ret = do_usal_sense(usalp, sp);
return (ret);
}
#define sense u_sense.Sense
#undef SC_PARITY
#define SC_PARITY 0x09
#define scb u_scb.Scb
/*--------------------------------------------------------------------------*/
#include <unixstd.h>
#include <waitdefs.h>
/*
* Simplified version of popen()
* This version of popen() is not usable more than once at a time.
* Needed because /etc/scsi/pdiconfig will not work if euid != uid
*/
static pid_t po_pid;
static FILE *
xpopen(char *cmd, char *type)
{
FILE *ret;
FILE *pp[2];
if (po_pid != 0)
return ((FILE *)NULL);
if (*type != 'r')
return ((FILE *)NULL);
if (fpipe(pp) == 0)
return ((FILE *)NULL);
if ((po_pid = fork()) == 0) {
setuid(0);
fclose(pp[0]);
(void) fexecl("/bin/sh", stdin, pp[1], stderr,
"sh", "-c", cmd, (char *)0);
_exit(1);
}
fclose(pp[1]);
if (po_pid == (pid_t)-1) {
fclose(pp[0]);
return ((FILE *)NULL);
}
return (pp[0]);
}
static int
xpclose(FILE *f)
{
int ret = 0;
if (po_pid == 0)
return (-1);
fclose(f);
if (waitpid(po_pid, &ret, 0) < 0)
ret = -1;
po_pid = 0;
return (ret);
}
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