1MKSTR(1) General Commands Manual MKSTR(1)
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6 mkstr - create an error message file by massaging C source
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9 mkstr [ - ] messagefile prefix file ...
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12 Mkstr is used to create files of error messages. Its use can make pro‐
13 grams with large numbers of error diagnostics much smaller, and reduce
14 system overhead in running the program as the error messages do not
15 have to be constantly swapped in and out.
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17 Mkstr will process each of the specified files, placing a massaged ver‐
18 sion of the input file in a file whose name consists of the specified
19 prefix and the original name. A typical usage of mkstr would be
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21 mkstr pistrings xx *.c
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23 This command would cause all the error messages from the C source files
24 in the current directory to be placed in the file pistrings and pro‐
25 cessed copies of the source for these files to be placed in files whose
26 names are prefixed with xx.
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28 To process the error messages in the source to the message file mkstr
29 keys on the string `error("' in the input stream. Each time it occurs,
30 the C string starting at the `"' is placed in the message file followed
31 by a null character and a new-line character; the null character termi‐
32 nates the message so it can be easily used when retrieved, the new-line
33 character makes it possible to sensibly cat the error message file to
34 see its contents. The massaged copy of the input file then contains a
35 lseek pointer into the file which can be used to retrieve the message,
36 i.e.:
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38 char efilname[] = "/usr/share/pascal/pi_strings";
39 int efil = -1;
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41 error(a1, a2, a3, a4)
42 {
43 char buf[256];
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45 if (efil < 0) {
46 efil = open(efilname, 0);
47 if (efil < 0) {
48 oops:
49 perror(efilname);
50 exit(1);
51 }
52 }
53 if (lseek(efil, (long) a1, 0) || read(efil, buf, 256) <= 0)
54 goto oops;
55 printf(buf, a2, a3, a4);
56 }
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58 The optional - causes the error messages to be placed at the end of the
59 specified message file for recompiling part of a large mkstred program.
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62 lseek(2), xstr(1)
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663rd Berkeley Distribution October 22, 1996 MKSTR(1)