132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2012 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include <sys/sem.h>
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#include "gtm_fcntl.h"
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#include "gtm_unistd.h"
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#include <errno.h>
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#include <stddef.h>
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#ifdef __MVS__
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#include "gtm_zos_io.h"
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#endif
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#include "gdsroot.h"
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#include "gtm_facility.h"
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#include "fileinfo.h"
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#include "gdsbt.h"
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#include "gdsfhead.h"
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#include "filestruct.h"
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#include "eintr_wrappers.h"
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#include "gtmio.h"
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#include "iosp.h"
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#include "is_file_identical.h"
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#include "dbfilop.h"
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#include "anticipatory_freeze.h"
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#include "jnl.h"
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GBLREF gd_region *gv_cur_region;
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error_def(ERR_DBFILOPERR);
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error_def(ERR_DBNOTGDS);
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error_def(ERR_DBOPNERR);
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error_def(ERR_DBPREMATEOF);
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error_def(ERR_TEXT);
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ZOS_ONLY(error_def(ERR_BADTAG);)
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uint4 dbfilop(file_control *fc)
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{
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unix_db_info *udi;
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struct stat stat_buf;
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int4 save_errno;
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int fstat_res;
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sgmnt_data_ptr_t csd;
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ZOS_ONLY(int realfiletag;)
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/* assert((dba_mm == fc->file_type) || (dba_bg == fc->file_type)); not always set in unix */
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udi = (unix_db_info *)fc->file_info;
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switch(fc->op)
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{
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case FC_READ:
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assert(fc->op_pos > 0); /* gt.m uses the vms convention of numbering the blocks from 1 */
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LSEEKREAD(udi->fd,
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(off_t)(fc->op_pos - 1) * DISK_BLOCK_SIZE,
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fc->op_buff,
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fc->op_len,
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save_errno);
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if (0 != save_errno)
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{
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if (-1 == save_errno)
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rts_error(VARLSTCNT(4) ERR_DBPREMATEOF, 2, LEN_AND_STR(udi->fn));
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else
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rts_error(VARLSTCNT(5) ERR_DBFILOPERR, 2, LEN_AND_STR(udi->fn), save_errno);
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}
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if (1 == fc->op_pos)
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{
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if (0 != memcmp(fc->op_buff, GDS_LABEL, GDS_LABEL_SZ - 3))
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rts_error(VARLSTCNT(4) ERR_DBNOTGDS, 2, LEN_AND_STR(udi->fn));
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if (0 == memcmp(fc->op_buff, GDS_LABEL, GDS_LABEL_SZ - 1)) /* current GDS */
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{
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csd = (sgmnt_data_ptr_t)fc->op_buff;
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if (offsetof(sgmnt_data, minor_dbver) < fc->op_len)
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CHECK_DB_ENDIAN((sgmnt_data_ptr_t)fc->op_buff, strlen(udi->fn), udi->fn);
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}
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}
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break;
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case FC_WRITE:
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if ((1 == fc->op_pos) && ((0 != memcmp(fc->op_buff, GDS_LABEL, GDS_LABEL_SZ - 1))
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|| (0 == ((sgmnt_data_ptr_t)fc->op_buff)->acc_meth)))
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GTMASSERT;
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assert((1 != fc->op_pos) || fc->op_len <= SIZEOF_FILE_HDR(fc->op_buff));
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DB_LSEEKWRITE(&udi->s_addrs, udi->fn, udi->fd,
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(off_t)(fc->op_pos - 1) * DISK_BLOCK_SIZE,
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fc->op_buff,
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fc->op_len,
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save_errno);
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if (0 != save_errno)
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rts_error(VARLSTCNT(5) ERR_DBFILOPERR, 2, LEN_AND_STR(udi->fn), save_errno);
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break;
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case FC_OPEN:
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gv_cur_region->read_only = FALSE; /* maintain csa->read_write simultaneously */
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udi->s_addrs.read_write = TRUE; /* maintain reg->read_only simultaneously */
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if (FD_INVALID == (udi->fd = OPEN((char *)gv_cur_region->dyn.addr->fname, O_RDWR)))
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{
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if (FD_INVALID == (udi->fd = OPEN((char *)gv_cur_region->dyn.addr->fname, O_RDONLY)))
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return ERR_DBOPNERR;
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gv_cur_region->read_only = TRUE; /* maintain csa->read_write simultaneously */
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udi->s_addrs.read_write = FALSE; /* maintain reg->read_only simultaneously */
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}
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FSTAT_FILE(udi->fd, &stat_buf, fstat_res);
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if (-1 == fstat_res)
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return ERR_DBOPNERR;
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#ifdef __MVS__
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if (-1 == gtm_zos_tag_to_policy(udi->fd, TAG_BINARY, &realfiletag))
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TAG_POLICY_SEND_MSG((char_ptr_t)gv_cur_region->dyn.addr->fname, errno,
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realfiletag, TAG_BINARY);
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#endif
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set_gdid_from_stat(&udi->fileid, &stat_buf);
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udi->raw = (S_ISCHR(stat_buf.st_mode) || S_ISBLK(stat_buf.st_mode));
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udi->fn = (char *)gv_cur_region->dyn.addr->fname;
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break;
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case FC_CLOSE:
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CLOSEFILE_RESET(udi->fd, save_errno); /* resets "udi->fd" to FD_INVALID */
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if (0 != save_errno)
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rts_error(VARLSTCNT(5) ERR_DBFILOPERR, 2, LEN_AND_STR(udi->fn), save_errno);
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break;
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default:
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GTMASSERT;
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}
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return SS_NORMAL;
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}
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