1VAL(P) POSIX Programmer's Manual VAL(P)
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6 val - validate SCCS files (DEVELOPMENT)
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9 val -
10 val [-s][-m name][-r SID][-y type] file...
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15 The val utility shall determine whether the specified file is an SCCS
16 file meeting the characteristics specified by the options.
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19 The val utility shall conform to the Base Definitions volume of
20 IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines, except
21 that the usage of the '-' operand is not strictly as intended by the
22 guidelines (that is, reading options and operands from standard input).
23 The following options shall be supported:
25 -m name
27 Specify a name, which is compared with the SCCS %M% keyword in
28 file; see get .
29 -r SID
31 Specify a SID (SCCS Identification String), an SCCS delta num‐
32 ber. A check shall be made to determine whether the SID is
33 ambiguous (for example, -r 1 is ambiguous because it physically
34 does not exist but implies 1.1, 1.2, and so on, which may exist)
35 or invalid (for example, -r 1.0 or -r 1.1.0 are invalid because
36 neither case can exist as a valid delta number). If the SID is
37 valid and not ambiguous, a check shall be made to determine
38 whether it actually exists.
39 -s Silence the diagnostic message normally written to standard out‐
41 put for any error that is detected while processing each named
42 file on a given command line.
43 -y type
45 Specify a type, which shall be compared with the SCCS %Y% key‐
46 word in file; see get .
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50 The following operands shall be supported:
51 file A pathname of an existing SCCS file. If exactly one file operand
53 appears, and it is '-' , the standard input shall be read: each
54 line shall be independently processed as if it were a command
55 line argument list. (However, the line is not subjected to any
56 of the shell word expansions, such as parameter expansion or
57 quote removal.)
58
61 The standard input shall be a text file used only when the file operand
62 is specified as '-' .
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65 Any SCCS files processed shall be files of an unspecified format.
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68 The following environment variables shall affect the execution of val:
69 LANG Provide a default value for the internationalization variables
71 that are unset or null. (See the Base Definitions volume of
72 IEEE Std 1003.1-2001, Section 8.2, Internationalization Vari‐
73 ables for the precedence of internationalization variables used
74 to determine the values of locale categories.)
75 LC_ALL If set to a non-empty string value, override the values of all
77 the other internationalization variables.
78 LC_CTYPE
80 Determine the locale for the interpretation of sequences of
81 bytes of text data as characters (for example, single-byte as
82 opposed to multi-byte characters in arguments and input files).
83 LC_MESSAGES
85 Determine the locale that should be used to affect the format
86 and contents of diagnostic messages written to standard error,
87 and informative messages written to standard output.
88 NLSPATH
90 Determine the location of message catalogs for the processing of
91 LC_MESSAGES .
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95 Default.
96
98 The standard output shall consist of informative messages about either:
99 1. Each file processed
101 2. Each command line read from standard input
103 If the standard input is not used, for each file operand yielding a
105 discrepancy, the output line shall have the following format:
106 "%s: %s\n", <pathname>, <unspecified string>
109 If standard input is used, a line of input shall be written before each
111 of the preceding lines for files containing discrepancies:
112 "%s:\n", <input line>
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117 Not used.
118
120 None.
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123 None.
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126 The 8-bit code returned by val shall be a disjunction of the possible
127 errors; that is, it can be interpreted as a bit string where set bits
128 are interpreted as follows:
129 0x80 ───── Missing file argument.
131 0x40 ───── Unknown or duplicate option.
132 0x20 ───── Corrupted SCCS file.
134 0x10 ───── Cannot open file or file not SCCS.
135 0x08 ───── SID is invalid or ambiguous.
136 0x04 ───── SID does not exist.
137 0x02 ───── %Y%, -y mismatch.
138 0x01 ───── %M%, -m mismatch.
139 Note that val can process two or more files on a given command line and
141 can process multiple command lines (when reading the standard input).
142 In these cases an aggregate code shall be returned: a logical OR of the
143 codes generated for each command line and file processed.
144
146 Default.
147 The following sections are informative.
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151 Since the val exit status sets the 0x80 bit, shell applications check‐
152 ing "$?" cannot tell if it terminated due to a missing file argument or
153 receipt of a signal.
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156 In a directory with three SCCS files- s.x (of t type "text"), s.y, and
157 s.z (a corrupted file)-the following command could produce the output
158 shown:
159 val - <<EOF
162 -y source s.x
163 -m y s.y
164 s.z
165 EOF
166 -y source s.x
169 s.x: %Y%, -y mismatch
172 s.z
173 s.z: corrupted SCCS file
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178 None.
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181 None.
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184 admin , delta , get , prs
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187 Portions of this text are reprinted and reproduced in electronic form
188 from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
189 -- Portable Operating System Interface (POSIX), The Open Group Base
190 Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
191 Electrical and Electronics Engineers, Inc and The Open Group. In the
192 event of any discrepancy between this version and the original IEEE and
193 The Open Group Standard, the original IEEE and The Open Group Standard
194 is the referee document. The original Standard can be obtained online
195 at http://www.opengroup.org/unix/online.html .
196IEEE/The Open Group 2003 VAL(P)