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Add GNU-style `-print0' primary. This exists so that one can safely

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do `find some-nasty-expression -print0 | perl -n0e unlink' and have all
the files actuallly get deleted.  (Using `xargs' and `rm' is not safe.)
This commit is contained in:
Garrett Wollman 1995-05-09 19:02:06 +00:00
parent 2b50c84ac1
commit 7cd23434fe
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=8389
5 changed files with 39 additions and 4 deletions
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1
usr.bin/find/extern.h
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@ -64,6 +64,7 @@ PLAN *c_nouser __P((void));
PLAN *c_path __P((char *));
PLAN *c_perm __P((char *));
PLAN *c_print __P((void));
PLAN *c_print0 __P((void));
PLAN *c_prune __P((void));
PLAN *c_size __P((char *));
PLAN *c_type __P((char *));

16
usr.bin/find/find.1
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@ -265,12 +265,19 @@ Note, the first character of a symbolic mode may not be a dash (``\-'').
.It Ic -print
This primary always evaluates to true.
It prints the pathname of the current file to standard output.
The expression is appended to the user specified expression if neither
The expression is appended to the user specified expression if none of
.Ic -exec ,
.Ic -ls
.Ic -ls ,
.Ic -print0 ,
or
.Ic \&-ok
is specified.
are specified.
.It Ic -print0
This primary always evaluates to true.
It prints the pathname of the current file to standard output, followed by a
.Tn ASCII
.Tn NUL
character (character code 0).
.It Ic -prune
This primary always evaluates to true.
It causes
@ -404,7 +411,8 @@ The
and
.Fl X
options and the
.Ic -inum
.Ic -inum ,
.Ic -print0 ,
and
.Ic -ls
primaries are extensions to

1
usr.bin/find/find.h
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@ -43,6 +43,7 @@ enum ntype {
N_FSTYPE, N_GROUP, N_INUM, N_LINKS, N_LS, N_MTIME, N_NAME, N_NEWER,
N_NOGROUP, N_NOT, N_NOUSER, N_OK, N_OPENPAREN, N_OR, N_PATH,
N_PERM, N_PRINT, N_PRUNE, N_SIZE, N_TYPE, N_USER, N_XDEV,
N_PRINT0
};
/* node definition */

24
usr.bin/find/function.c
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@ -793,6 +793,30 @@ c_print()
return (palloc(N_PRINT, f_print));
}
/*
* -print0 functions --
*
* Always true, causes the current pathame to be written to
* standard output followed by a NUL character
*/
int
f_print0(plan, entry)
PLAN *plan;
FTSENT *entry;
{
fputs(entry->fts_path, stdout);
fputc('\0', stdout);
return (1);
}
PLAN *
c_print0()
{
isoutput = 1;
return (palloc(N_PRINT0, f_print0));
}
/*
* -prune functions --
*

1
usr.bin/find/option.c
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@ -79,6 +79,7 @@ static OPTION const options[] = {
{ "-path", N_PATH, c_path, O_ARGV },
{ "-perm", N_PERM, c_perm, O_ARGV },
{ "-print", N_PRINT, c_print, O_ZERO },
{ "-print0", N_PRINT0, c_print0, O_ZERO },
{ "-prune", N_PRUNE, c_prune, O_ZERO },
{ "-size", N_SIZE, c_size, O_ARGV },
{ "-type", N_TYPE, c_type, O_ARGV },