891 lines
28 KiB
C
891 lines
28 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2011 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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/* Define macros to do our IO and restart as appropriate
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*
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* IOCTL Loop until ioctl call succeeds or fails with other than EINTR.
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* OPENFILE Loop until open succeeds or fails with other than EINTR.
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* OPENFILE_SYNC
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* Loop until open succeeds or fails with other than EINTR.
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* Opens with O_DSYNC/O_SYNC in direct mode where possible.
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* Else opens only with O_DSYNC or O_SYNC.
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* OPEN_OBJECT_FILE
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* Opens the object file and waits till it gets a lock(shr/excl).
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* Sets default perms if it creates a new file.
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* CLOSE_OBJECT_FILE - close the object file after releasing the lock on it.
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* CLOSEFILE Loop until close succeeds for fails with other than EINTR.
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* CLOSEFILE_RESET
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* Loop until close succeeds for fails with other than EINTR.
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* At end reset channel to FD_INVALID unconditionally (even if close was not successful).
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* CONVERT_OBJECT_LOCK - convert type of lock held on object file
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* LSEEKREAD Performs either pread() or an lseek()/ read() combination. In
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* the latter case, sets global variable to warn off async IO routines.
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* LSEEKREAD_AVAILABLE Same as LSEEKREAD except it has an extra parameter where the number of bytes
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* ACTUALLY READ are stored irrespective of whether all REQUESTED BYTES were read or not.
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* LSEEKWRITE Same as LSEEKREAD but for WRITE.
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* DOREADRC Performs read, returns code 0 if okay, otherwise returns errno.
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* DOREADRL Performs read but returns length read or -1 if errno is set.
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* DOREADRLTO2 Same as DOREADRL but has a timeout flag to poll on interrupts.
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* DOWRITE Performs write with no error checking/return.
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* DOWRITERC Performs write, returns code 0 if okay, otherwise returns errno.
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* DOWRITERL Performs write but returns length written or -1 if errno is set.
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* WRITEPIPE Performs write to FIFO/pipe but individual writes (within loop) limited to system pipe buffer size
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*/
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#ifndef GTMIO_Included
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#define GTMIO_Included
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#include <sys/types.h>
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#include "gtm_stat.h"
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#include "gtm_unistd.h"
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#include "gtm_fcntl.h"
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#include "eintr_wrappers.h"
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#include "min_max.h"
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#ifdef __linux__
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#include <sys/vfs.h>
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#endif
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#ifdef KEEP_zOS_EBCDIC
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#define DOWRITE_A __write_a
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#define DOREAD_A __read_a
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#define DOWRITERL_A #error need to create as part of z/OS port and make __write_a return status and good errno
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#else
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#define DOWRITE_A DOWRITE
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#define DOREAD_A read
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#define DOWRITERL_A DOWRITERL
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#endif
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#define MAX_FILE_OPEN_TRIES 20 /* polling count */
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#define WAIT_FOR_FILE_TIME 100 /* msec */
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#define WAIT_FOR_BLOCK_TIME 100 /* msec */
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#define IOCTL(FDESC, REQUEST, ARG, RC) \
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{ \
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do \
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{ \
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RC = ioctl(FDESC, REQUEST, ARG); \
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} while(-1 == RC && EINTR == errno); \
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if (-1 != RC) \
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RC = 0; \
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else \
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RC = errno; \
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}
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#define OPENFILE(FNAME, FFLAGS, FDESC) \
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{ \
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do \
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{ \
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FDESC = OPEN(FNAME, FFLAGS); \
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} while(-1 == FDESC && EINTR == errno); \
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}
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#define OPENFILE3(FNAME, FFLAGS, FMODE, FDESC) \
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{ \
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do \
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{ \
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FDESC = OPEN3(FNAME, FFLAGS, FMODE); \
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} while(-1 == FDESC && EINTR == errno); \
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}
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/* OPENFILE4 not needed - io_open_try handles interrupts */
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#define FSTYPE_ADVFS "advfs"
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#define FSTYPE_UFS "ufs"
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#if defined(_AIX)
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#define OPENFILE_SYNC(FNAME, FFLAGS, FDESC) OPENFILE(FNAME, FFLAGS | O_DIRECT | O_DSYNC, FDESC);
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/* Note: putting the DIRECTIO_FLAG definition before the #if and then redefining it below for the two exceptions
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* causes a warning on sparc - "macro redefined: DIRECTIO_FLAG" so it is repeated in each part of the big #define
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*/
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#define DIRECTIO_FLAG O_DIRECT
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#elif defined(__osf__)
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#define OPENFILE_SYNC(FNAME, FFLAGS, FDESC) \
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{ \
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struct statvfs statvfs_buf; \
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int macro_errno; \
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boolean_t dio_success = TRUE; \
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if (-1 == statvfs(FNAME, &statvfs_buf)) \
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{ \
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macro_errno = errno; \
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util_out_print("Error finding FS type for file, !AD :!AD", OPER, \
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LEN_AND_STR(FNAME), LEN_AND_STR(STRERROR(macro_errno))); \
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dio_success = FALSE; \
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} else if (strcmp(FSTYPE_ADVFS, statvfs_buf.f_basetype)) \
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dio_success = FALSE; \
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if (dio_success) \
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{ \
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OPENFILE(FNAME, FFLAGS | O_DIRECTIO | O_DSYNC, FDESC); \
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} else \
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{ \
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OPENFILE(FNAME, FFLAGS | O_DSYNC, FDESC); \
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} \
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}
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#define DIRECTIO_FLAG O_DIRECTIO
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#elif defined(__sparc)
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#define OPENFILE_SYNC(FNAME, FFLAGS, FDESC) \
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{ \
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struct statvfs statvfs_buf; \
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int macro_errno; \
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boolean_t dio_success = TRUE; \
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if (-1 == statvfs(FNAME, &statvfs_buf)) \
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{ \
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macro_errno = errno; \
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util_out_print("Error finding FS type for file, !AD. !AD", OPER, \
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LEN_AND_STR(FNAME), LEN_AND_STR(STRERROR(macro_errno))); \
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dio_success = FALSE; \
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} else if (strcmp(FSTYPE_UFS, statvfs_buf.f_basetype)) \
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dio_success = FALSE; \
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OPENFILE(FNAME, FFLAGS | O_DSYNC, FDESC); \
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if (dio_success && (FD_INVALID != FDESC)) \
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{ \
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if (-1 == directio(FDESC, DIRECTIO_ON)) \
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{ \
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macro_errno = errno; \
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util_out_print("Failed to set DIRECT IO option for !AD, reverting to normal IO. !AD ", \
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OPER, LEN_AND_STR(FNAME), LEN_AND_STR(STRERROR(macro_errno))); \
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} \
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} \
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}
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#define DIRECTIO_FLAG 0
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#elif defined(__MVS__)
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#define OPENFILE_SYNC(FNAME, FFLAGS, FDESC) OPENFILE(FNAME, FFLAGS | O_SYNC, FDESC);
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#define DIRECTIO_FLAG 0
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#elif defined(__linux__)
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#define OPENFILE_SYNC(FNAME, FFLAGS, FDESC) OPENFILE(FNAME, FFLAGS | O_DIRECT | O_DSYNC, FDESC);
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#define DIRECTIO_FLAG O_DIRECT
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#elif defined(__hpux)
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#define OPENFILE_SYNC(FNAME, FFLAGS, FDESC) OPENFILE(FNAME, FFLAGS | O_DIRECT | O_DSYNC, FDESC);
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#define DIRECTIO_FLAG O_DIRECT
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#else
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#error UNSUPPORTED PLATFORM
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#endif
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#if defined( __linux__)
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/* A special handling was needed for linux due to its inability to lock
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* over NFS. The only difference in code is an added check for NFS file
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* thru fstatfs
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*
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* This should ideally include <linux/nfs_fs.h> for NFS_SUPER_MAGIC.
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* However, this header file doesn't seem to be standard and gives lots of
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* compilation errors and hence defining again here. The constant value
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* seems to be portable across all linuxes (courtesy 'statfs' man pages)
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*/
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#define NFS_SUPER_MAGIC 0x6969
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#define LOCK_IS_ALLOWED(FDESC, STATUS) \
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{ \
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struct statfs buf; \
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STATUS = ((-1 != fstatfs(FDESC, &buf)) && (NFS_SUPER_MAGIC != buf.f_type)) ? 0 : -2; \
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}
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#else
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#define LOCK_IS_ALLOWED(FDESC, STATUS) STATUS = 0
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#endif
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/* The for loop is the workaround for a glitch in read locking in zlink. The primary steps to acquire a
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* read-lock are 1. open the file, and 2. read lock it. If a process creates the initial, empty version
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* of the file (with the OPEN3), but has not yet write-locked it, and meanwhile, another process does its
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* open and gets a read-lock, then a later read within incr_link() will end up reading an empty file. To
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* avoid that problem, readers have to poll for a non-empty object file before reading. If the read lock
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* is obtained, but the file is empty, then release the read lock, sleep for a while, and retry the file open.
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*/
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#define OPEN_OBJECT_FILE(FNAME, FFLAG, FDESC) \
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{ \
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int status; \
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struct flock lock; /* arg to lock the file thru fnctl */ \
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int cntr; \
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struct stat stat_buf; \
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pid_t l_pid; \
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ZOS_ONLY(int realfiletag;) \
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\
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l_pid = getpid(); \
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for (cntr = 0; cntr < MAX_FILE_OPEN_TRIES; cntr++) \
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{ \
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while (FD_INVALID == (FDESC = OPEN3(FNAME, FFLAG, 0666)) && EINTR == errno) \
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; \
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if (-1 != FDESC) \
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{ \
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LOCK_IS_ALLOWED(FDESC, status); \
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if (-2 != status) \
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{ \
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do { \
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lock.l_type = ((O_WRONLY == ((FFLAG) & O_ACCMODE)) || \
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( O_RDWR == ((FFLAG) & O_ACCMODE))) ? F_WRLCK : F_RDLCK; \
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lock.l_whence = SEEK_SET; /*locking offsets from file beginning*/ \
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lock.l_start = lock.l_len = 0; /* lock the whole file */ \
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lock.l_pid = l_pid; \
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} while (-1 == (status = fcntl(FDESC, F_SETLKW, &lock)) && EINTR == errno); \
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} \
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if (-1 != status) \
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{ \
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if ((FFLAG) & O_CREAT) \
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{ \
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FTRUNCATE(FDESC, 0, status); \
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ZOS_ONLY( \
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status = gtm_zos_set_tag(FDESC, TAG_BINARY, TAG_NOTTEXT, TAG_FORCE, &realfiletag); \
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) \
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} else \
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{ \
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FSTAT_FILE(FDESC, &stat_buf, status); \
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if (status || (0 == stat_buf.st_size)) \
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{ \
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CLOSE_OBJECT_FILE(FDESC, status); \
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SHORT_SLEEP(WAIT_FOR_FILE_TIME); \
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continue; \
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} \
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ZOS_ONLY( \
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status = gtm_zos_tag_to_policy(FDESC, TAG_BINARY, &realfiletag); \
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) \
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} \
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} \
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if (-1 == status) \
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CLOSEFILE_RESET(FDESC, status);/* can't fail - no writes, no writes-behind */ \
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} \
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break; \
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} \
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}
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#define CONVERT_OBJECT_LOCK(FDESC, FFLAG, RC) \
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{ \
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struct flock lock; /* arg to lock the file thru fnctl */ \
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pid_t l_pid; \
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\
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l_pid = getpid(); \
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do { \
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lock.l_type = FFLAG; \
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lock.l_whence = SEEK_SET; /*locking offsets from file beginning*/ \
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lock.l_start = lock.l_len = 0; /* lock the whole file */ \
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lock.l_pid = l_pid; \
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} while (-1 == (RC = fcntl(FDESC, F_SETLKW, &lock)) && EINTR == errno); \
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}
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#define CLOSE_OBJECT_FILE(FDESC, RC) \
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{ \
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struct flock lock; /* arg to unlock the file thru fnctl */ \
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do { \
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lock.l_type = F_UNLCK; \
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lock.l_whence = SEEK_SET; \
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lock.l_start = lock.l_len = 0; /* unlock the whole file */ \
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lock.l_pid = getpid(); \
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} while (-1 == (RC = fcntl(FDESC, F_SETLK, &lock)) && EINTR == errno); \
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CLOSEFILE_RESET(FDESC, RC); \
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}
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#define CLOSEFILE(FDESC, RC) \
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{ \
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do \
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{ \
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RC = close(FDESC); \
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} while(-1 == RC && EINTR == errno); \
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if (-1 == RC) /* Had legitimate error - return it */ \
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RC = errno; \
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}
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#define CLOSEFILE_RESET(FDESC, RC) \
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{ \
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CLOSEFILE(FDESC, RC) \
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FDESC = FD_INVALID; \
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}
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/* Close file only if we have it open. Use FCNTL to check if we have it open */
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#define CLOSEFILE_IF_OPEN(FDESC, RC) \
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{ \
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int flags; \
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\
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FCNTL2(FDESC, F_GETFL, flags); \
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if ((-1 != flags) || (EBADF != errno)) \
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CLOSEFILE(FDESC, RC); /* file is a valid descriptor. Close it */ \
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}
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#if defined(__osf__) || defined(_AIX) || defined(__sparc) || defined(__linux__) || defined(__hpux) || \
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defined(__CYGWIN__) || defined(__MVS__)
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/* These platforms are known to support pread/pwrite. MVS is unknown and so gets the old support.
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Note !! pread and pwrite do NOT (on most platforms) set the file pointer like lseek/read/write would
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so they are NOT a drop in replacement !!
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*/
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#define NOPIO_ONLY(X)
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#define GET_LSEEK_FLAG(FDESC, VAL)
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/* If definitions are flying around for pread/pread64, don't override them. Otherwise on HPUX
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we need to run the 64bit versions of these calls because the POSIX version linkage to the
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64 bit variation is broken. SE 07/2005.
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*/
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#if (defined(__hpux) && !defined(__ia64))
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# if !defined(pread) && !defined(pread64)
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# define pread pread64
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# define pwrite pwrite64
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# else
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# error "** Interference with pread/pwrite defines - HPUX may have fixed their problem **"
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# endif
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#endif
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#define LSEEKREAD(FDESC, FPTR, FBUFF, FBUFF_LEN, RC) \
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{ \
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ssize_t gtmioStatus; \
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size_t gtmioBuffLen; \
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off_t gtmioPtr; \
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sm_uc_ptr_t gtmioBuff; \
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gtmioBuffLen = FBUFF_LEN; \
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gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
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gtmioPtr = (off_t)(FPTR); \
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for (;;) \
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{ \
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if (-1 != (gtmioStatus = pread(FDESC, gtmioBuff, gtmioBuffLen, gtmioPtr))) \
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{ \
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gtmioBuffLen -= gtmioStatus; \
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if (0 == gtmioBuffLen || 0 == gtmioStatus) \
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break; \
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gtmioBuff += gtmioStatus; \
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gtmioPtr += gtmioStatus; \
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continue; \
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} \
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if (EINTR != errno) \
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break; \
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} \
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if (0 == gtmioBuffLen) \
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RC = 0; \
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else if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
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RC = errno; \
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else \
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RC = -1; /* Something kept us from reading what we wanted */ \
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}
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/* The below macro is almost the same as LSEEKREAD except it has an extra parameter where the number of
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* bytes ACTUALLY READ are stored irrespective of whether all REQUESTED BYTES were read or not.
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*/
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#define LSEEKREAD_AVAILABLE(FDESC, FPTR, FBUFF, FBUFF_LEN, ACTUAL_READLEN, RC) \
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{ \
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ssize_t gtmioStatus; \
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size_t gtmioBuffLen; \
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off_t gtmioPtr; \
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sm_uc_ptr_t gtmioBuff; \
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\
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gtmioBuffLen = (FBUFF_LEN); \
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gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
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gtmioPtr = (off_t)(FPTR); \
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for (;;) \
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{ \
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if (-1 != (gtmioStatus = pread(FDESC, gtmioBuff, gtmioBuffLen, gtmioPtr))) \
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{ \
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gtmioBuffLen -= gtmioStatus; \
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if (0 == gtmioBuffLen || 0 == gtmioStatus) \
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break; \
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gtmioBuff += gtmioStatus; \
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gtmioPtr += gtmioStatus; \
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continue; \
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} \
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if (EINTR != errno) \
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break; \
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} \
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(ACTUAL_READLEN) = (FBUFF_LEN) - gtmioBuffLen; \
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if (0 == gtmioBuffLen) \
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RC = 0; \
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else if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
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RC = errno; \
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else \
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RC = -1; /* Something kept us from reading what we wanted */ \
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}
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#define LSEEKWRITE(FDESC, FPTR, FBUFF, FBUFF_LEN, RC) \
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{ \
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ssize_t gtmioStatus; \
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size_t gtmioBuffLen; \
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off_t gtmioPtr; \
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sm_uc_ptr_t gtmioBuff; \
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gtmioBuffLen = FBUFF_LEN; \
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gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
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gtmioPtr = (off_t)(FPTR); \
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for (;;) \
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{ \
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if (-1 != (gtmioStatus = pwrite(FDESC, gtmioBuff, gtmioBuffLen, gtmioPtr))) \
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{ \
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gtmioBuffLen -= gtmioStatus; \
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if (0 == gtmioBuffLen) \
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break; \
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gtmioBuff += gtmioStatus; \
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gtmioPtr += gtmioStatus; \
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continue; \
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} \
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if (EINTR != errno) \
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break; \
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} \
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if (0 == gtmioBuffLen) \
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RC = 0; \
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else if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
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RC = errno; \
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else \
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RC = -1; /* Something kept us from writing what we wanted */ \
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}
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#else /* real lseek and read/write - still need to protect against interrupts inbetween calls */
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#define NOPIO_ONLY(X) X
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/* Note array is not initialized but first IO to a given file descriptor will initialize that element */
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#define GET_LSEEK_FLAGS_ARRAY \
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{ \
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GBLREF boolean_t *lseekIoInProgress_flags; \
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if ((boolean_t *)0 == lseekIoInProgress_flags) \
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lseekIoInProgress_flags = (boolean_t *)malloc(sysconf(_SC_OPEN_MAX) * SIZEOF(boolean_t)); \
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}
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#define GET_LSEEK_FLAG(FDESC, VAL) \
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{ \
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GBLREF boolean_t *lseekIoInProgress_flags; \
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GET_LSEEK_FLAGS_ARRAY; \
|
|
VAL = lseekIoInProgress_flags[(FDESC)]; \
|
|
}
|
|
|
|
#define SET_LSEEK_FLAG(FDESC, VAL) \
|
|
{ \
|
|
GBLREF boolean_t *lseekIoInProgress_flags; \
|
|
GET_LSEEK_FLAGS_ARRAY; \
|
|
lseekIoInProgress_flags[(FDESC)] = VAL; \
|
|
}
|
|
|
|
#define LSEEKREAD(FDESC, FPTR, FBUFF, FBUFF_LEN, RC) \
|
|
{ \
|
|
GBLREF boolean_t *lseekIoInProgress_flags; \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
off_t gtmioPtr; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
SET_LSEEK_FLAG(FDESC, TRUE); \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
gtmioPtr = (off_t)(FPTR); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = (ssize_t)lseek(FDESC, gtmioPtr, SEEK_SET))) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = read(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen || 0 == gtmioStatus) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
gtmioPtr += gtmioStatus; \
|
|
continue; \
|
|
} \
|
|
} \
|
|
if (EINTR != errno) \
|
|
break; \
|
|
} \
|
|
if (0 == gtmioBuffLen) \
|
|
RC = 0; \
|
|
else if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
|
|
RC = errno; \
|
|
else \
|
|
RC = -1; /* Something kept us from reading what we wanted */ \
|
|
SET_LSEEK_FLAG(FDESC, FALSE); /* Reason this is last is so max optimization occurs */ \
|
|
}
|
|
|
|
/* The below macro is almost the same as LSEEKREAD except it has an extra parameter where the number of
|
|
* bytes ACTUALLY READ are stored irrespective of whether all REQUESTED BYTES were read or not.
|
|
*/
|
|
#define LSEEKREAD_AVAILABLE(FDESC, FPTR, FBUFF, FBUFF_LEN, ACTUAL_READLEN, RC) \
|
|
{ \
|
|
GBLREF boolean_t *lseekIoInProgress_flags; \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
off_t gtmioPtr; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
\
|
|
SET_LSEEK_FLAG(FDESC, TRUE); \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
gtmioPtr = (off_t)(FPTR); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = (ssize_t)lseek(FDESC, gtmioPtr, SEEK_SET))) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = read(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen || 0 == gtmioStatus) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
gtmioPtr += gtmioStatus; \
|
|
continue; \
|
|
} \
|
|
} \
|
|
if (EINTR != errno) \
|
|
break; \
|
|
} \
|
|
(ACTUAL_READLEN) = (FBUFF_LEN) - gtmioBuffLen; \
|
|
if (0 == gtmioBuffLen) \
|
|
RC = 0; \
|
|
else if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
|
|
RC = errno; \
|
|
else \
|
|
RC = -1; /* Something kept us from reading what we wanted */ \
|
|
SET_LSEEK_FLAG(FDESC, FALSE); /* Reason this is last is so max optimization occurs */ \
|
|
}
|
|
|
|
#define LSEEKWRITE(FDESC, FPTR, FBUFF, FBUFF_LEN, RC) \
|
|
{ \
|
|
GBLREF boolean_t *lseekIoInProgress_flags; \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
off_t gtmioPtr; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
SET_LSEEK_FLAG(FDESC, TRUE); \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
gtmioPtr = (off_t)(FPTR); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = (ssize_t)lseek(FDESC, gtmioPtr, SEEK_SET))) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = write(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
gtmioPtr += gtmioStatus; \
|
|
continue; \
|
|
} \
|
|
} \
|
|
if (EINTR != errno) \
|
|
break; \
|
|
} \
|
|
if (0 == gtmioBuffLen) \
|
|
RC = 0; \
|
|
else if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
|
|
RC = errno; \
|
|
else \
|
|
RC = -1; /* Something kept us from writing what we wanted */ \
|
|
SET_LSEEK_FLAG(FDESC, FALSE); /* Reason this is last is so max optimization occurs */ \
|
|
}
|
|
#endif /* if old lseekread/writes */
|
|
|
|
#define DOREADRC(FDESC, FBUFF, FBUFF_LEN, RC) \
|
|
{ \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = read(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen || 0 == gtmioStatus) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
} \
|
|
else if (EINTR != errno) \
|
|
break; \
|
|
} \
|
|
if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
|
|
RC = errno; \
|
|
else if (0 == gtmioBuffLen) \
|
|
RC = 0; \
|
|
else \
|
|
RC = -1; /* Something kept us from reading what we wanted */ \
|
|
}
|
|
|
|
#define DOREADRL(FDESC, FBUFF, FBUFF_LEN, RLEN) \
|
|
{ \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = read(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen || 0 == gtmioStatus) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
} \
|
|
else if (EINTR != errno) \
|
|
break; \
|
|
} \
|
|
if (-1 != gtmioStatus) \
|
|
RLEN = (int)(FBUFF_LEN - gtmioBuffLen); /* Return length actually read */ \
|
|
else /* Had legitimate error - return it */ \
|
|
RLEN = -1; \
|
|
}
|
|
|
|
#define DOREADRLTO2(FDESC, FBUFF, FBUFF_LEN, TOFLAG, BLOCKED_IN, ISPIPE, FLAGS, RLEN, \
|
|
TOT_BYTES_READ, TIMER_ID, MSEC_TIMEOUT, PIPE_ZERO_TIMEOUT, UTF_VAR_PF, PIPE_OR_FIFO) \
|
|
{ \
|
|
ssize_t gtmioStatus; \
|
|
int skip_read = FALSE;\
|
|
int tfcntl_res;\
|
|
size_t gtmioBuffLen; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
gtmioBuffLen = (size_t)FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
for (;;) \
|
|
{ \
|
|
/* if it is a read x:0 on a pipe and it is not blocked (always the case when starting a read)\
|
|
then try and read one char. If it succeeds then turn on blocked io and read the rest\
|
|
of the line.*/\
|
|
if (ISPIPE && (FALSE == *BLOCKED_IN)) \
|
|
{\
|
|
for (;;)\
|
|
{\
|
|
if (-1 != (gtmioStatus = read(FDESC, gtmioBuff, 1))) \
|
|
{ \
|
|
if (0 == gtmioStatus) /* end of file */\
|
|
{\
|
|
skip_read = TRUE;\
|
|
break;\
|
|
}\
|
|
FCNTL3(FDESC, F_SETFL, FLAGS, tfcntl_res); \
|
|
if (0 > tfcntl_res) \
|
|
rts_error(VARLSTCNT(8) ERR_SYSCALL, 5, LEN_AND_LIT("fcntl"), CALLFROM, errno);\
|
|
*BLOCKED_IN = TRUE; \
|
|
if (PIPE_ZERO_TIMEOUT) \
|
|
{\
|
|
TOFLAG = FALSE; \
|
|
/* Set a timer for 1 sec so atomic read x:0 will still work on\
|
|
loaded systems but timeout on incomplete reads. Any characters\
|
|
read to this point will be returned. */ \
|
|
*MSEC_TIMEOUT = timeout2msec(1);\
|
|
start_timer(TIMER_ID, *MSEC_TIMEOUT, wake_alarm, 0, NULL); \
|
|
} \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
gtmioBuff += gtmioStatus;\
|
|
/* if only asked to read 1 character then skip additional read */\
|
|
if (0 == gtmioBuffLen)\
|
|
skip_read = TRUE;\
|
|
break;\
|
|
} \
|
|
else if (EINTR != errno || TOFLAG)\
|
|
{\
|
|
skip_read = TRUE;\
|
|
break;\
|
|
}\
|
|
}\
|
|
}\
|
|
/* if we didn't read 1 character or it's an error don't read anymore now */\
|
|
if (TRUE == skip_read) break;\
|
|
if (-1 != (gtmioStatus = read(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen || 0 == gtmioStatus) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
/* If it is pipe or fifo, read data that is currently available. If pipe contains data less than \
|
|
the CHUNK_SIZE, no need to read once again since it is in BLOCKING mode, in which case it will return -1. \
|
|
So in the first read itself (after a successful read) break from the infinite loop. This variable is TRUE \
|
|
if DOREADRLTO2 macro is called for a CHUNK_SIZE read. In other places (eg: iorm_get) it will be FALSE. \
|
|
*/ \
|
|
if (UTF_VAR_PF) \
|
|
break; \
|
|
} \
|
|
else if (EINTR != errno || TOFLAG) \
|
|
break; \
|
|
if (PIPE_OR_FIFO && outofband) \
|
|
break;\
|
|
} \
|
|
if (-1 != gtmioStatus) \
|
|
RLEN = (int)(FBUFF_LEN - gtmioBuffLen); /* Return length actually read */ \
|
|
else /* Had legitimate error - return it */ \
|
|
{\
|
|
/* Store the number of bytes read in this invocation before we error out */ \
|
|
*TOT_BYTES_READ = (int)(FBUFF_LEN - gtmioBuffLen); \
|
|
RLEN = -1; \
|
|
} \
|
|
}
|
|
|
|
#define DOWRITE(FDESC, FBUFF, FBUFF_LEN) \
|
|
{ \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
assert(0 != gtmioBuffLen); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = write(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
} \
|
|
else if (EINTR != errno) \
|
|
break; \
|
|
} \
|
|
/* GTMASSERT? */ \
|
|
}
|
|
|
|
#define DOWRITERC(FDESC, FBUFF, FBUFF_LEN, RC) \
|
|
{ \
|
|
GBLREF int gtm_non_blocked_write_retries; \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
int block_cnt = 0; \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = write(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
} \
|
|
else if (EINTR != errno && EAGAIN != errno) \
|
|
break; \
|
|
else if (EAGAIN == errno) \
|
|
{ \
|
|
if (gtm_non_blocked_write_retries <= block_cnt) \
|
|
break; \
|
|
SHORT_SLEEP(WAIT_FOR_BLOCK_TIME); \
|
|
block_cnt++; \
|
|
} \
|
|
} \
|
|
if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
|
|
RC = errno; \
|
|
else if (0 == gtmioBuffLen) \
|
|
RC = 0; \
|
|
else \
|
|
RC = -1; /* Something kept us from writing what we wanted */ \
|
|
}
|
|
|
|
#define DOLLAR_DEVICE_SET(DEVPTR,STATUS) \
|
|
{ \
|
|
len = SIZEOF(ONE_COMMA) - 1; \
|
|
memcpy(DEVPTR->dollar_device, ONE_COMMA, len); \
|
|
errptr = (char *)STRERROR(STATUS); \
|
|
/* make sure there is room for the 1, and the null at the end */ \
|
|
errlen = MIN(STRLEN(errptr), SIZEOF(DEVPTR->dollar_device) - SIZEOF(ONE_COMMA)); \
|
|
memcpy(&DEVPTR->dollar_device[len], errptr, errlen); \
|
|
DEVPTR->dollar_device[len + errlen] = '\0'; \
|
|
}
|
|
|
|
#define DOLLAR_DEVICE_WRITE(DEVPTR,STATUS) \
|
|
{ \
|
|
int len; \
|
|
int errlen; \
|
|
char *errptr; \
|
|
/* save error in $device */ \
|
|
if (EAGAIN == STATUS) \
|
|
{ \
|
|
len = SIZEOF(ONE_COMMA_UNAVAILABLE); \
|
|
memcpy(DEVPTR->dollar_device, ONE_COMMA_UNAVAILABLE, len); \
|
|
} else \
|
|
DOLLAR_DEVICE_SET(DEVPTR,STATUS); \
|
|
}
|
|
|
|
#define DOWRITERL(FDESC, FBUFF, FBUFF_LEN, RLEN) \
|
|
{ \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
int block_cnt = 0; \
|
|
\
|
|
GBLREF int gtm_non_blocked_write_retries; \
|
|
\
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
for (;;) \
|
|
{ \
|
|
if (-1 != (gtmioStatus = write(FDESC, gtmioBuff, gtmioBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
} \
|
|
else if (EINTR != errno && EAGAIN != errno) \
|
|
break; \
|
|
else if (EAGAIN == errno) \
|
|
{ \
|
|
if (gtm_non_blocked_write_retries <= block_cnt) \
|
|
break; \
|
|
SHORT_SLEEP(WAIT_FOR_BLOCK_TIME); \
|
|
block_cnt++; \
|
|
} \
|
|
} \
|
|
if (-1 != gtmioStatus) \
|
|
RLEN = (int)(FBUFF_LEN - gtmioBuffLen); /* Return length actually written */ \
|
|
else /* Had legitimate error - return it */ \
|
|
RLEN = -1; \
|
|
}
|
|
|
|
#define DO_FILE_READ(CHANNEL, OFFSET, READBUFF, LEN, STATUS1, STATUS2) \
|
|
{ \
|
|
STATUS2 = SS_NORMAL; \
|
|
LSEEKREAD(CHANNEL, OFFSET, READBUFF, LEN, STATUS1); \
|
|
if (-1 == STATUS1) \
|
|
STATUS1 = ERR_PREMATEOF; \
|
|
}
|
|
|
|
#define DO_FILE_WRITE(CHANNEL, OFFSET, WRITEBUFF, LEN, STATUS1, STATUS2) \
|
|
{ \
|
|
STATUS2 = SS_NORMAL; \
|
|
LSEEKWRITE(CHANNEL, OFFSET, WRITEBUFF, LEN, STATUS1); \
|
|
if (-1 == STATUS1) \
|
|
STATUS1 = ERR_PREMATEOF; \
|
|
}
|
|
|
|
typedef struct {
|
|
int fd;
|
|
mstr v;
|
|
}file_pointer;
|
|
|
|
/* WRITEPIPE is a work-around for a problem found in z/OS where the kernel doesn't seem to
|
|
* break up writes into small enough pieces, requiring that we do it ourselves. The fix is
|
|
* applied to all Unix platforms, even though all except z/OS seem to work with monster writes.
|
|
*/
|
|
#define WRITEPIPE(FDESC, PIPESZ, FBUFF, FBUFF_LEN, RC) \
|
|
{ \
|
|
GBLREF int gtm_non_blocked_write_retries; \
|
|
ssize_t gtmioStatus; \
|
|
size_t gtmioBuffLen; \
|
|
size_t shortBuffLen; \
|
|
sm_uc_ptr_t gtmioBuff; \
|
|
int block_cnt = 0; \
|
|
gtmioBuffLen = FBUFF_LEN; \
|
|
gtmioBuff = (sm_uc_ptr_t)(FBUFF); \
|
|
for (;;) \
|
|
{ \
|
|
shortBuffLen = MIN(PIPESZ, gtmioBuffLen); \
|
|
if (-1 != (gtmioStatus = write(FDESC, gtmioBuff, shortBuffLen))) \
|
|
{ \
|
|
gtmioBuffLen -= gtmioStatus; \
|
|
if (0 == gtmioBuffLen) \
|
|
break; \
|
|
gtmioBuff += gtmioStatus; \
|
|
} \
|
|
else if (EINTR != errno && EAGAIN != errno) \
|
|
break; \
|
|
else if (EAGAIN == errno) \
|
|
{ \
|
|
if (gtm_non_blocked_write_retries <= block_cnt) \
|
|
break; \
|
|
SHORT_SLEEP(WAIT_FOR_BLOCK_TIME); \
|
|
block_cnt++; \
|
|
} \
|
|
} \
|
|
if (-1 == gtmioStatus) /* Had legitimate error - return it */ \
|
|
RC = errno; \
|
|
else if (0 == gtmioBuffLen) \
|
|
RC = 0; \
|
|
else \
|
|
RC = -1; /* Something kept us from writing what we wanted */ \
|
|
}
|
|
|
|
#endif
|