perf tools: Remove dead quote.[ch] code

In c6867701 ("perf tools: Remove support for command aliases") we
removed the only remaining use of a function provided by these files, so
ditch it.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-mgnzqbi46gucs48d7bzfwr55@git.kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/perf.c

@@ -12,7 +12,6 @@
 #include "util/env.h"
 #include <subcmd/exec-cmd.h>
 #include "util/config.h"
-#include "util/quote.h"
 #include <subcmd/run-command.h>
 #include "util/parse-events.h"
 #include <subcmd/parse-options.h>

tools/perf/util/Build

@@ -24,7 +24,6 @@ libperf-y += libstring.o
 libperf-y += bitmap.o
 libperf-y += hweight.o
 libperf-y += smt.o
-libperf-y += quote.o
 libperf-y += strbuf.o
 libperf-y += string.o
 libperf-y += strlist.o

tools/perf/util/quote.c

-// SPDX-License-Identifier: GPL-2.0
-#include <errno.h>
-#include <stdlib.h>
-#include "strbuf.h"
-#include "quote.h"
-#include "util.h"
-
-/* Help to copy the thing properly quoted for the shell safety.
- * any single quote is replaced with '\'', any exclamation point
- * is replaced with '\!', and the whole thing is enclosed in a
- *
- * E.g.
- *  original     sq_quote     result
- *  name     ==> name      ==> 'name'
- *  a b      ==> a b       ==> 'a b'
- *  a'b      ==> a'\''b    ==> 'a'\''b'
- *  a!b      ==> a'\!'b    ==> 'a'\!'b'
- */
-static inline int need_bs_quote(char c)
-{
-	return (c == '\'' || c == '!');
-}
-
-static int sq_quote_buf(struct strbuf *dst, const char *src)
-{
-	char *to_free = NULL;
-	int ret;
-
-	if (dst->buf == src)
-		to_free = strbuf_detach(dst, NULL);
-
-	ret = strbuf_addch(dst, '\'');
-	while (!ret && *src) {
-		size_t len = strcspn(src, "'!");
-		ret = strbuf_add(dst, src, len);
-		src += len;
-		while (!ret && need_bs_quote(*src))
-			ret = strbuf_addf(dst, "'\\%c\'", *src++);
-	}
-	if (!ret)
-		ret = strbuf_addch(dst, '\'');
-	free(to_free);
-
-	return ret;
-}
-
-int sq_quote_argv(struct strbuf *dst, const char** argv, size_t maxlen)
-{
-	int i, ret;
-
-	/* Copy into destination buffer. */
-	ret = strbuf_grow(dst, 255);
-	for (i = 0; !ret && argv[i]; ++i) {
-		ret = strbuf_addch(dst, ' ');
-		if (ret)
-			break;
-		ret = sq_quote_buf(dst, argv[i]);
-		if (maxlen && dst->len > maxlen)
-			return -ENOSPC;
-	}
-	return ret;
-}

tools/perf/util/quote.h

-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef __PERF_QUOTE_H
-#define __PERF_QUOTE_H
-
-#include <stddef.h>
-
-/* Help to copy the thing properly quoted for the shell safety.
- * any single quote is replaced with '\'', any exclamation point
- * is replaced with '\!', and the whole thing is enclosed in a
- * single quote pair.
- *
- * For example, if you are passing the result to system() as an
- * argument:
- *
- * sprintf(cmd, "foobar %s %s", sq_quote(arg0), sq_quote(arg1))
- *
- * would be appropriate.  If the system() is going to call ssh to
- * run the command on the other side:
- *
- * sprintf(cmd, "git-diff-tree %s %s", sq_quote(arg0), sq_quote(arg1));
- * sprintf(rcmd, "ssh %s %s", sq_util/quote.host), sq_quote(cmd));
- *
- * Note that the above examples leak memory!  Remember to free result from
- * sq_quote() in a real application.
- */
-
-struct strbuf;
-
-int sq_quote_argv(struct strbuf *, const char **argv, size_t maxlen);
-
-#endif /* __PERF_QUOTE_H */