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fis-gtm/sr_unix/io_open_try.c

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/****************************************************************
* *
* Copyright 2001, 2011 Fidelity Information Services, Inc *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gtm_string.h"
#include "gtm_fcntl.h"
#include "gtm_unistd.h"
#include "gtm_stat.h"
#include "gtm_iconv.h"
#include "gtm_socket.h"
#include "gtm_inet.h"
#include <errno.h>
#include <sys/ioctl.h>
#include "io.h"
#include "iosp.h"
#include "iotimer.h"
#include "io_params.h"
#include "gt_timer.h"
#include "copy.h"
#include "iottdef.h"
#include "iomtdef.h"
#include "io_dev_dispatch.h"
#ifdef __MVS__
#include "iormdef.h"
#endif
#include "eintr_wrappers.h"
#include "mmemory.h"
#include "gtm_caseconv.h"
#include "outofband.h"
#include "wake_alarm.h"
#include "stringpool.h"
#include "gtm_conv.h"
#include "gtm_utf8.h"
#include "gtmimagename.h"
#define LOGNAME_LEN 255
/* avoid calling getservbyname for shell and Kerberos shell */
#define RSHELL_PORT 514
#define KSHELL_PORT 544
LITREF unsigned char io_params_size[];
GBLREF dev_dispatch_struct io_dev_dispatch[];
GBLREF io_desc *active_device;
GBLREF mstr sys_input;
GBLREF mstr sys_output;
GBLREF bool out_of_time;
GBLREF int4 outofband;
GBLREF int4 write_filter;
LITREF mstr chset_names[];
bool io_open_try(io_log_name *naml, io_log_name *tl, mval *pp, int4 timeout, mval *mspace) /* timeout in seconds */
{
uint4 status;
int4 msec_timeout; /* timeout in milliseconds */
mstr tn; /* translated name */
int oflag;
params *param;
unsigned char ch;
bool timed = FALSE;
int file_des;
#ifdef __MVS__
int file_des_w = -2; /* fifo write */
uint4 status_w;
d_rm_struct *d_rm_out, *d_rm_in;
#endif
boolean_t filecreated = FALSE;
TID timer_id;
struct stat outbuf;
char *buf, namebuf[LOGNAME_LEN + 1];
unsigned char dev_type[MAX_DEV_TYPE_LEN];
d_mt_struct *mt_ptr;
iosb io_status_blk;
mstr chset_mstr;
int umask_orig, umask_creat;
int char_or_block_special;
int stat_res;
int fstat_res;
int p_offset, len;
boolean_t mknod_err , stat_err;
int save_mknod_err, save_stat_err;
int sockstat, sockoptval;
in_port_t sockport;
GTM_SOCKLEN_TYPE socknamelen;
struct sockaddr_in sockname;
GTM_SOCKLEN_TYPE sockoptlen;
boolean_t ichset_specified, ochset_specified;
mt_ptr = NULL;
char_or_block_special = FALSE;
out_of_time = FALSE;
file_des = -2;
oflag = 0;
mknod_err = FALSE;
stat_err = FALSE;
tn.len = tl->len;
if (tn.len > LOGNAME_LEN)
tn.len = LOGNAME_LEN;
tn.addr = tl->dollar_io;
memcpy(namebuf, tn.addr, tn.len);
namebuf[tn.len] = '\0';
buf = namebuf;
timer_id = (TID)io_open_try;
if (NO_M_TIMEOUT == timeout)
{
timed = FALSE;
msec_timeout = NO_M_TIMEOUT;
} else
{
timed = TRUE;
msec_timeout = timeout2msec(timeout);
if (!msec_timeout)
timed = FALSE;
}
if (0 == naml->iod)
{
if (0 == tl->iod)
{
tl->iod = (io_desc *)malloc(SIZEOF(io_desc));
memset((char*)tl->iod, 0, SIZEOF(io_desc));
tl->iod->pair.in = tl->iod;
tl->iod->pair.out = tl->iod;
tl->iod->trans_name = tl;
tl->iod->type = n_io_dev_types;
p_offset = 0;
while(iop_eol != *(pp->str.addr + p_offset))
{
ch = *(pp->str.addr + p_offset++);
if (iop_fifo == ch)
tl->iod->type = ff;
else if (iop_sequential == ch)
tl->iod->type = rm;
p_offset += ((IOP_VAR_SIZE == io_params_size[ch]) ?
(unsigned char)*(pp->str.addr + p_offset) + 1 : io_params_size[ch]);
}
if (ff == tl->iod->type)
{
/* fifo with RW permissions for owner, group, other */
if ((-1 != MKNOD(buf, FIFO_PERMISSION, 0))
#ifdef __MVS__
|| (EEXIST == errno)
#endif
)
{
#ifdef __MVS__
if (EEXIST != errno)
filecreated = TRUE;
/* create another one for fifo write */
tl->iod->pair.out = (io_desc *)malloc(SIZEOF(io_desc));
(tl->iod->pair.out)->pair.in = tl->iod;
(tl->iod->pair.out)->pair.out = (tl->iod->pair.out);
(tl->iod->pair.out)->trans_name = tl;
(tl->iod->pair.out)->type = ff;
#else
filecreated = TRUE;
#endif
} else if (EEXIST != errno)
{
mknod_err = TRUE;
save_mknod_err = errno;
/* This save_err will be checked immediately after error_handler is set;
In that way error handler will get the chance to handle any error */
}
}
}
if ((n_io_dev_types == tl->iod->type) && mspace && mspace->str.len)
{
lower_to_upper(dev_type, (uchar_ptr_t)mspace->str.addr, mspace->str.len);
if (((SIZEOF("SOCKET") - 1) == mspace->str.len)
&& (0 == MEMCMP_LIT(dev_type, "SOCKET")))
tl->iod->type = gtmsocket;
else if (((SIZEOF("PIPE") - 1) == mspace->str.len)
&& (0 == MEMCMP_LIT(dev_type, "PIPE")))
tl->iod->type = pi;
else if (((SIZEOF("TCP") - 1) == mspace->str.len)
&& (0 == MEMCMP_LIT(dev_type, "TCP")))
tl->iod->type = tcp;
else
tl->iod->type = us;
}
if (n_io_dev_types == tl->iod->type)
{
if (0 == memvcmp(tn.addr, tn.len, sys_input.addr, sys_input.len))
file_des = 0;
else if (0 == memvcmp(tn.addr, tn.len, sys_output.addr, sys_output.len))
file_des = 1;
if (0 == file_des || 1 == file_des)
{
FSTAT_FILE(file_des, &outbuf, fstat_res);
if (-1 == fstat_res)
{ /* save errno to be handled by exception handler if set */
save_stat_err = errno;
stat_err = TRUE;
}
}
else if (0 == memvcmp(tn.addr, tn.len, LIT_AND_LEN("/dev/null")))
tl->iod->type = nl;
else
{
STAT_FILE(buf, &outbuf, stat_res);
if ((-1 == stat_res) && (n_io_dev_types == tl->iod->type))
{
if (ENOENT == errno)
{
tl->iod->type = rm;
filecreated = TRUE;
} else
{ /* save errno to be checked later */
save_stat_err = errno;
stat_err = TRUE;
}
}
}
}
if (n_io_dev_types == tl->iod->type)
{
if (!stat_err)
{
switch(outbuf.st_mode & S_IFMT)
{
case S_IFCHR:
case S_IFBLK:
char_or_block_special = TRUE;
break;
case S_IFIFO:
tl->iod->type = ff;
break;
case S_IFREG:
case S_IFDIR:
tl->iod->type = rm;
break;
case S_IFSOCK:
/* If SOCK_STREAM, AF_INET, and not [kr]shell port assume we were
started by inetd.
We are not able to trigger exception until active_device set
and exception parsed which is not done for fd == 0/1 which
is from io_init called from gtm_startup before condition handlers
are setup so we can't report errors, just will be treated as rm.
Note the fall through if the above conditions are not true to
maintain compatibility for rshd startup PER 3252.
28-JUL-1995 14:24:31 FERTIG REPLACE IO_OPEN_TRY.C(18)
"PER 3252: fix problems starting up mumps from an ""rsh"" or ""remsh"""
*/
sockoptlen = SIZEOF(sockoptval);
sockstat = getsockopt(file_des, SOL_SOCKET, SO_TYPE, &sockoptval,
(GTM_SOCKLEN_TYPE *)&sockoptlen);
if (!sockstat && SOCK_STREAM == sockoptval)
{
socknamelen = SIZEOF(sockname);
sockstat = getsockname(file_des,
(struct sockaddr *)&sockname,
(GTM_SOCKLEN_TYPE *)&socknamelen);
if (!sockstat && AF_INET == sockname.sin_family)
{
sockport = ntohs(sockname.sin_port);
if (RSHELL_PORT != sockport && KSHELL_PORT != sockport)
{
tl->iod->type = gtmsocket;
break;
}
}
}
/* fall through */
case 0:
tl->iod->type = ff;
break;
default:
break;
}
}
}
naml->iod = tl->iod;
}
assert((0 <= naml->iod->state) && (n_io_dev_states > naml->iod->state));
active_device = naml->iod;
if ((-2 == file_des) && (dev_open != naml->iod->state) && (us != naml->iod->type)
&& (tcp != naml->iod->type) && (gtmsocket != naml->iod->type) && (pi != naml->iod->type))
{
oflag |= (O_RDWR | O_CREAT | O_NOCTTY);
p_offset = 0;
ichset_specified = ochset_specified = FALSE;
while(iop_eol != *(pp->str.addr + p_offset))
{
assert((params) *(pp->str.addr + p_offset) < (params)n_iops);
switch ((ch = *(pp->str.addr + p_offset++)))
{
case iop_exception:
{
naml->iod->error_handler.len = *(pp->str.addr + p_offset);
naml->iod->error_handler.addr = (char *)(pp->str.addr + p_offset + 1);
s2pool(&naml->iod->error_handler);
break;
}
case iop_append:
if (rm == naml->iod->type)
oflag |= O_APPEND;
break;
case iop_contiguous:
break;
case iop_newversion:
if ((dev_open != naml->iod->state) && (rm == naml->iod->type))
oflag |= O_TRUNC;
break;
case iop_readonly:
oflag &= ~(O_RDWR | O_CREAT | O_WRONLY);
oflag |= O_RDONLY;
break;
case iop_writeonly:
# ifdef __MVS__
if (ff != naml->iod->type)
# endif
{
oflag &= ~(O_RDWR | O_RDONLY);
oflag |= O_WRONLY | O_CREAT;
}
break;
case iop_ipchset:
#ifdef KEEP_zOS_EBCDIC
if ( (iconv_t)0 != naml->iod->input_conv_cd )
{
ICONV_CLOSE_CD(naml->iod->input_conv_cd);
}
SET_CODE_SET(naml->iod->in_code_set, (char *)(pp->str.addr + p_offset + 1));
if (DEFAULT_CODE_SET != naml->iod->in_code_set)
ICONV_OPEN_CD(naml->iod->input_conv_cd,
(char *)(pp->str.addr + p_offset + 1), INSIDE_CH_SET);
#endif
break;
case iop_opchset:
#ifdef KEEP_zOS_EBCDIC
if ( (iconv_t)0 != naml->iod->output_conv_cd)
{
ICONV_CLOSE_CD(naml->iod->output_conv_cd);
}
SET_CODE_SET(naml->iod->out_code_set, (char *)(pp->str.addr + p_offset + 1));
if (DEFAULT_CODE_SET != naml->iod->out_code_set)
ICONV_OPEN_CD(naml->iod->output_conv_cd, INSIDE_CH_SET,
(char *)(pp->str.addr + p_offset + 1));
#endif
break;
case iop_m:
case iop_utf8:
case iop_utf16:
case iop_utf16be:
case iop_utf16le:
break;
default:
break;
}
p_offset += ((IOP_VAR_SIZE == io_params_size[ch]) ?
(unsigned char)*(pp->str.addr + p_offset) + 1 : io_params_size[ch]);
}
/* Check the saved error from mknod() for fifo, also saved error from fstat() or stat()
so error handler (if set) can handle it */
if (ff == tl->iod->type && mknod_err)
rts_error(VARLSTCNT(1) save_mknod_err);
/* Error from either stat() or fstat() function */
if (stat_err)
rts_error(VARLSTCNT(1) save_stat_err);
if (timed)
start_timer(timer_id, msec_timeout, wake_alarm, 0, NULL);
/* RW permissions for owner and others as determined by umask. */
umask_orig = umask(000); /* determine umask (destructive) */
(void)umask(umask_orig); /* reset umask */
umask_creat = 0666 & ~umask_orig;
/*
* no OPEN EINTR macros in the following while loop due to complex error checks and processing between
* top of while and calls to OPEN3
*/
while ((-1 == (file_des = OPEN3(buf, oflag, umask_creat))) && !out_of_time)
{
if (timed && (0 == msec_timeout))
out_of_time = TRUE;
if (outofband)
outofband_action(FALSE);
if ( EINTR == errno
|| ETXTBSY == errno
|| ENFILE == errno
|| EBUSY == errno
|| ((mb == naml->iod->type) && (ENXIO == errno)))
continue;
else
{
#ifdef __MVS__
if (EINVAL == errno && ff == tl->iod->type && (oflag & O_RDONLY) && (oflag & O_WRONLY))
{
int oflag_clone;
int fcntl_res;
/* oflag must be O_RDWR, set it to be O_RDONLY */
oflag &= ~O_WRONLY;
oflag |= O_NONBLOCK;
while ((-1 == (file_des = OPEN3(buf, oflag, umask_creat))) && !out_of_time)
{
if (0 == msec_timeout)
out_of_time = TRUE;
if (outofband)
outofband_action(FALSE);
if ( EINTR == errno
|| ETXTBSY == errno
|| ENFILE == errno
|| EBUSY == errno
|| ((mb == naml->iod->type) && (ENXIO == errno)))
continue;
else
break;
}
FCNTL2(file_des, F_GETFL, oflag_clone);
FCNTL3(file_des, F_SETFL, (oflag_clone & ~O_NONBLOCK), fcntl_res);
/* oflag was just made O_RDONLY, now set it to be O_WRONLY */
oflag |= O_WRONLY;
oflag &= ~O_RDONLY;
while ((-1 == (file_des_w = OPEN3(buf, oflag, umask_creat))) && !out_of_time)
{
if (0 == msec_timeout)
out_of_time = TRUE;
if (outofband)
outofband_action(FALSE);
if ( EINTR == errno
|| ETXTBSY == errno
|| ENFILE == errno
|| EBUSY == errno
|| ((mb == naml->iod->type) && (ENXIO == errno)))
continue;
else
break;
}
}
#endif
break;
}
}
if (out_of_time && (-1 == file_des))
{
if ((ff == tl->iod->type) && filecreated)
{ /* The FIFO didn't really exist so remove all traces of it */
UNLINK(tl->iod->trans_name->dollar_io);
tl->iod->type = rm;
remove_rms(tl->iod);
}
return FALSE;
}
}
if (timed && !out_of_time)
cancel_timer(timer_id);
#ifdef KEEP_zOS_EBCDIC
if ((tcp != naml->iod->type) && (gtmsocket != naml->iod->type))
{
SET_CODE_SET(naml->iod->in_code_set, OUTSIDE_CH_SET);
if (DEFAULT_CODE_SET != naml->iod->in_code_set)
ICONV_OPEN_CD(naml->iod->input_conv_cd, OUTSIDE_CH_SET, INSIDE_CH_SET);
SET_CODE_SET(naml->iod->out_code_set, OUTSIDE_CH_SET);
if (DEFAULT_CODE_SET != naml->iod->out_code_set)
ICONV_OPEN_CD(naml->iod->output_conv_cd, INSIDE_CH_SET, OUTSIDE_CH_SET);
} else
{
SET_CODE_SET(naml->iod->out_code_set, INSIDE_CH_SET);
if (DEFAULT_CODE_SET != naml->iod->out_code_set)
ICONV_OPEN_CD(naml->iod->output_conv_cd, OUTSIDE_CH_SET, INSIDE_CH_SET);
SET_CODE_SET(naml->iod->in_code_set, INSIDE_CH_SET);
if (DEFAULT_CODE_SET != naml->iod->in_code_set)
ICONV_OPEN_CD(naml->iod->input_conv_cd, INSIDE_CH_SET, OUTSIDE_CH_SET);
}
#endif
if (-1 == file_des)
rts_error(VARLSTCNT(1) errno);
if (n_io_dev_types == naml->iod->type)
{
if (isatty(file_des))
naml->iod->type = tt;
else if (char_or_block_special && file_des > 2)
/* assume mag tape */
naml->iod->type = mt;
else
naml->iod->type = rm;
}
assert(naml->iod->type < n_io_dev_types);
naml->iod->disp_ptr = &io_dev_dispatch[naml->iod->type];
if (dev_never_opened == naml->iod->state)
{
naml->iod->wrap = DEFAULT_IOD_WRAP;
naml->iod->width = DEFAULT_IOD_WIDTH;
naml->iod->length = DEFAULT_IOD_LENGTH;
naml->iod->write_filter = write_filter;
}
if (dev_open != naml->iod->state)
{
naml->iod->dollar.x = 0;
naml->iod->dollar.y = 0;
naml->iod->dollar.za = 0;
naml->iod->dollar.zb[0] = 0;
}
#ifdef __MVS__
/* copy over the content of tl->iod(naml->iod) to (tl->iod->pair.out) */
if (ff == tl->iod->type)
{
*(tl->iod->pair.out) = *(tl->iod);
(tl->iod->pair.out)->pair.in = tl->iod;
(tl->iod->pair.out)->pair.out = (tl->iod->pair.out);
assert((0 <= tl->iod->pair.out->state) && (n_io_dev_states > tl->iod->pair.out->state));
if (-1 < file_des_w)
{
io_desc *io_ptr;
io_log_name dev_name; /* dummy */
io_ptr = (tl->iod->pair.out);
assert(io_ptr != tl->iod->pair.in);
assert(NULL != io_ptr);
assert(io_ptr->state >= 0 && io_ptr->state < n_io_dev_states);
assert(ff == io_ptr->type);
dev_name.iod = tl->iod->pair.out;
if (TRUE == ioff_open(&dev_name, pp, file_des_w, mspace, timeout))
(tl->iod->pair.out)->state = dev_open;
else if (dev_open == (tl->iod->pair.out)->state)
(tl->iod->pair.out)->state = dev_closed;
}
else if ((-2 == file_des_w) && (O_WRONLY == (oflag & O_ACCMODE)))
active_device = naml->iod = tl->iod->pair.out;
if (0 == file_des_w)
(tl->iod->pair.out)->dollar.zeof = TRUE;
}
#endif
naml->iod->newly_created = filecreated;
status = (naml->iod->disp_ptr->open)(naml, pp, file_des, mspace, timeout);
if (TRUE == status)
naml->iod->state = dev_open;
else if ((dev_open == naml->iod->state) && (gtmsocket != naml->iod->type))
naml->iod->state = dev_closed;
#ifdef __MVS__
d_rm_out = tl->iod->pair.out->dev_sp;
d_rm_in = tl->iod->pair.in->dev_sp;
if ((ff == tl->iod->pair.in->type) || (ff == tl->iod->pair.out->type))
{
if (NULL == d_rm_in)
{
tl->iod->pair.in->type = rm;
tl->iod->pair.in->state = tl->iod->pair.out->state;
tl->iod->pair.in->dev_sp = d_rm_out;
}
else if (NULL == d_rm_out)
{
tl->iod->pair.out->type = rm;
tl->iod->pair.out->state = tl->iod->pair.in->state;
tl->iod->pair.out->dev_sp = d_rm_in;
d_rm_in->read_fildes = FD_INVALID;
}
}
if (-1 < file_des_w)
{
d_rm_out->read_fildes = d_rm_in->fildes;
d_rm_out->read_filstr = d_rm_in->filstr;
free(d_rm_in);
tl->iod->pair.in->dev_sp = d_rm_out;
}
#endif
if (1 == file_des)
naml->iod->dollar.zeof = TRUE;
active_device = 0;
naml->iod->newly_created = FALSE;
if ((NO_M_TIMEOUT != timeout) && IS_MCODE_RUNNING)
return (status);
else
return TRUE;
}
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