54 lines
1.9 KiB
Diff
54 lines
1.9 KiB
Diff
From b91985eca0db632daecf6e20b1d3718f0f884389 Mon Sep 17 00:00:00 2001
|
|
From: =?UTF-8?q?Mantas=20Mikul=C4=97nas?= <grawity@gmail.com>
|
|
Date: Sun, 13 Jul 2014 18:49:00 +0300
|
|
Subject: [PATCH] fileio: quote more shell characters in envfiles
|
|
|
|
Turns out, making strings shell-proof is harder than expected:
|
|
|
|
# machinectl set-hostname "foo|poweroff" && . /etc/machine-info
|
|
|
|
(This could be simplified by quoting *and* escaping all characters,
|
|
which is harmless in shell but unnecessary.)
|
|
|
|
(cherry picked from commit 0ce5a80601597fe4d1a715a8f70ce8d5ccaa2d86)
|
|
---
|
|
src/shared/fileio.c | 4 ++--
|
|
src/shared/util.h | 6 ++++++
|
|
2 files changed, 8 insertions(+), 2 deletions(-)
|
|
|
|
diff --git a/src/shared/fileio.c b/src/shared/fileio.c
|
|
index b1de5908c5..d22770b772 100644
|
|
--- a/src/shared/fileio.c
|
|
+++ b/src/shared/fileio.c
|
|
@@ -738,11 +738,11 @@ static void write_env_var(FILE *f, const char *v) {
|
|
p++;
|
|
fwrite(v, 1, p-v, f);
|
|
|
|
- if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE "\'\"\\`$")) {
|
|
+ if (string_has_cc(p, NULL) || chars_intersect(p, WHITESPACE SHELL_NEED_QUOTES)) {
|
|
fputc('\"', f);
|
|
|
|
for (; *p; p++) {
|
|
- if (strchr("\'\"\\`$", *p))
|
|
+ if (strchr(SHELL_NEED_ESCAPE, *p))
|
|
fputc('\\', f);
|
|
|
|
fputc(*p, f);
|
|
diff --git a/src/shared/util.h b/src/shared/util.h
|
|
index 7124e51d90..64b9fc6884 100644
|
|
--- a/src/shared/util.h
|
|
+++ b/src/shared/util.h
|
|
@@ -93,6 +93,12 @@
|
|
#define COMMENTS "#;"
|
|
#define GLOB_CHARS "*?["
|
|
|
|
+/* What characters are special in the shell? */
|
|
+/* must be escaped outside and inside double-quotes */
|
|
+#define SHELL_NEED_ESCAPE "\"\\`$"
|
|
+/* can be escaped or double-quoted */
|
|
+#define SHELL_NEED_QUOTES SHELL_NEED_ESCAPE GLOB_CHARS "'()<>|&;"
|
|
+
|
|
#define FORMAT_BYTES_MAX 8
|
|
|
|
#define ANSI_HIGHLIGHT_ON "\x1B[1;39m"
|