ltf.5
来自「<B>Digital的Unix操作系统VAX 4.2源码</B>」· 5 代码 · 共 539 行 · 第 1/2 页
5
539 行
"00000", maximum record length may exceed 99999 bytes6 16 - 21 ULTRIX File Status - st_mode returned from a stat(2) call4 22 - 25 ULTRIX File Owner ID - uid4 26 - 29 ULTRIX Owner Group Number - gid4 30 - 33 ULTRIX Link ID Sequence Number - if file is hard linked, contains the file sequence number of the file this file is linked to3 34 - 36 ULTRIX True File Type - three character representation of the ULTRIX disk file type (see below)1 37 Carriage Control - "A" = first byte of record contains FORTRAN carriage control character "M" = record contains all required forms control " " = (space) insert carriage return, and line feed between records10 38 - 47 ULTRIX File Size - in bytes if known, else spaces1 48 ULTRIX ltf Header Number - number of last HDR containing the full ULTRIX pathname of the file, digit between 3 and 91 49 ULTRIX ltf End of File Header Number - number of last EOF containing the full ULTRIX pathname of the file, digit between 3 and 9, if "0", no path name in EOFs1 50 ULTRIX Hard Link Flag - necessary when the file linked to has not been put on the volume, thus this flag is used for forward references, "0" = no links or symbolic link, "1" = hard links2 51 - 52 Buffer Offset - number of bytes of Buffer Offset Field, which is the first record in the data block, if the Buffer Offset is greater than zero, not implemented by ltf and set to "00"28 53 - 80 ANSI reserved (spaces).EE.spThe ULTRIX disk file type is described in field 34-36 of HDR2. The following list contains the 3-character representationsyou can use to specify the disk file type:.EX 0"adf" - ASCII data file"asc" - ASCII text"arc" - Archive"arl" - Archive Random Library"asm" - Assembly language text"bin" - Binary data"bsp" - Block special file"cc " - 'C' program text"cmp" - Compressed text file"com" - Command text file"cpi" - CPIO file"csp" - Character special file"dir" - Directory"eng" - English text"exe" - Executable binary"for" - Fortran program source"fuf" - Fortran Unformatted File"nul" - Null/empty file"oar" - Old Archive"pip" - Named pipe"rof" - roff, nroff, troff, or eqn input text"soc" - Socket"sym" - Symbolic Link"???" - Content of file not determined.EE.PPHDR3 - Label Format - ANSI VERSION 3/4OPTIONAL file header label presence and content ignored if the volume was not created by an ULTRIX system. Content limited to "a" characters if VOL1 field 80 = "3".Embedded spaces in the path names are not permitted..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "HDR"1 4 "3"10 5 - 14 ULTRIX standard time of last change to file10 15 - 24 ULTRIX File Owner Name20 25 - 44 ULTRIX Hostname36 45 - 80 ULTRIX File Path Name - first 36 characters.EE.spHDR4 through HDR9 - Label Format - ANSI VERSION 3/4OPTIONAL file header label used by the .PN ltf to express some fractional component of the file's complete path name, but presence and content ignored if the volume was not created by an ULTRIX system. Content limited to "a" characters if VOL1 field 80 = "3"..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "HDR"1 4 "4" - "9"76 5 - 80 ULTRIX File Path Name - continuation from previous HDR, left justified and padded with blanks if needed.EE.spBUHLa - Label Format - ANSI VERSION 3/4OPTIONAL User File Header Labels not supported by the .PN ltf .They are notoutput and, if present on an input volume, their presence and content is ignored..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "UHL"1 4 any valid "a" character identifying this label76 5 - 80 Application Dependent.EE.spEOV1 - Label Format - ANSI VERSION 3/4First End-Of-Volume label that, if read before the first End Of File label (EOF1), indicates that the file is continued on the next volume.For valid hardware and software technical limitations,the ULTRIX .PN ltf does not support multivolume file setsand therefore does not output these labels.If present on an input volume, they are interpretedas indicating an error condition, due to the fact thatsome portion of the file will not be processed.The fields of this label are identical to the contents ofthe corresponding fields in the First File Header Label (HDR1),with the exceptions noted below.The following diagrams of EOV labels are intended forreference purposes only..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "EOV"1 4 "1"50 5 - 54 same as corresponding fields in HDR16 55 - 60 Block Count - number of blocks in which the file was recorded20 61 - 80 same as corresponding fields in HDR1.EE.spEOV2 - Label Format - ANSI VERSION 3/4The fields of the Second End-Of-Volume label are identical to the contents of the corresponding fields in the Second File Header Label (HDR2), with the exceptions noted. The .PN ltf does not support the use of EOV labels. See the previous description for EOV1.OPTIONAL End-Of-Volume labels 3 through 9 (EOV3 - EOV9) are notused by the .PN ltf . If present on an input volume, their presenceand content are ignored by the .PN ltf . See NOTES for EOV1..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "EOV"1 4 "2"76 5 - 80 same as corresponding fields in HDR2.EE.spEOF1 - Label Format - ANSI VERSION 3/4The fields of the First End-Of-File label are identical to the contents of the corresponding fields in the First File Header Label (HDR1), with the exceptions noted..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "EOF"1 4 "1"50 5 - 54 same as corresponding fields in HDR16 55 - 60 Block Count - number of blocks in which the file was recorded20 61 - 80 same as corresponding fields in HDR1.EEEOF2 - Label Format - ANSI VERSION 3/4The fields of the Second End-Of-File label are identical to the contents of the corresponding fields in the Second File Header Label (HDR2)..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "EOF"1 4 "2"76 5 - 80 same as corresponding fields in HDR2.EE.spEOF3 through EOF9 - Label Format - ANSI VERSION 3/4OPTIONAL ANSI end-of-file labels used by the .PN ltf to express somefractional component of the file's complete path name.The presence and content of these labels are ignoredif the volume was not created by an ULTRIX system. Content limited to "a" characters if VOL1 field 80 = "3"..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "EOF"1 4 "3" - "9"76 5 - 80 ULTRIX File Path Name - continuation from HDR9 and previous EOF, left justified and padded with blanks if needed.EE.spUTLa through UTLa - Label Format - ANSI VERSION 3/4OPTIONAL User File Trailer Labels Set is optional. If present on aninput volume, it is ignored by the .PN ltf . User File Trailer Labels are not output by the .PN ltf .If present, they take the form described. Their use is application dependent but not supported by the .PN ltf ..EX 0Size First & Descriptionof Last Field Byte # or Content----- ------- -----------3 1 - 3 "UTL"1 4 any valid "a" character identifying this label76 5 - 80 Application Dependent.EE.NXE "ltf file" "label formats".SH See Alsoltf(1).NXE "magnetic tape" "labeling".NXE "ltf file" "format"
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