Mercurial > hg > toybox
annotate toys/other/truncate.c @ 780:6cc69be43c42
Have error_msg() and friends set TT.exitval to 1 if it's still 0, clean out other places that were setting it that no longer need to.
author | Rob Landley <rob@landley.net> |
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date | Wed, 02 Jan 2013 02:00:35 -0600 |
parents | 786841fdb1e0 |
children | e5b52720f539 |
rev | line source |
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694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
1 /* truncate.c - set file length, extending sparsely if necessary |
396 | 2 * |
3 * Copyright 2011 Rob Landley <rob@landley.net> | |
4 | |
5 USE_TRUNCATE(NEWTOY(truncate, "<1s#|c", TOYFLAG_BIN)) | |
6 | |
7 config TRUNCATE | |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
8 bool "truncate" |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
9 default y |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
10 help |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
11 usage: truncate [-c] -s file... |
396 | 12 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
13 Set length of file(s), extending sparsely if necessary. |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
14 |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
15 -c Don't create file if it doesn't exist. |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
16 -s New size |
396 | 17 */ |
18 | |
674
7e846e281e38
New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
Rob Landley <rob@landley.net>
parents:
656
diff
changeset
|
19 #define FOR_truncate |
396 | 20 #include "toys.h" |
21 | |
674
7e846e281e38
New build infrastructure to generate FLAG_ macros and TT alias, #define FOR_commandname before #including toys.h to trigger it. Rename DEFINE_GLOBALS() to just GLOBALS() (because I could never remember if it was DECLARE_GLOBALS). Convert existing commands to use new infrastructure, and replace optflag constants with FLAG_ macros where appropriate.
Rob Landley <rob@landley.net>
parents:
656
diff
changeset
|
22 GLOBALS( |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
23 long size; |
396 | 24 ) |
25 | |
26 static void do_truncate(int fd, char *name) | |
27 { | |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
28 if (fd<0) return; |
780
6cc69be43c42
Have error_msg() and friends set TT.exitval to 1 if it's still 0, clean out other places that were setting it that no longer need to.
Rob Landley <rob@landley.net>
parents:
694
diff
changeset
|
29 if (ftruncate(fd, TT.size)) perror_msg("'%s' to '%ld'", name, TT.size); |
396 | 30 } |
31 | |
32 void truncate_main(void) | |
33 { | |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
34 int cr = !(toys.optflags&1); |
396 | 35 |
694
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
36 // Create files with mask rwrwrw. |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
37 // Nonexistent files are only an error if we're supposed to create them. |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
38 loopfiles_rw(toys.optargs, O_WRONLY|(cr ? O_CREAT : 0), 0666, cr, |
786841fdb1e0
Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents:
674
diff
changeset
|
39 do_truncate); |
396 | 40 } |