From: Mantas Mikulėnas <grawity@gmail.com>
Date: Sun, 14 Apr 2013 11:54:09 +0000 (+0300)
Subject: fileio: also escape $ and ` when writing out env vars
X-Git-Tag: v202~53
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=ced2d10a28cff3bab6fb613652db5abde8ed940e

fileio: also escape $ and ` when writing out env vars

These are also considered special by sh and bash.
---

diff --git a/src/shared/fileio.c b/src/shared/fileio.c
index 400a41616..617afeace 100644
--- a/src/shared/fileio.c
+++ b/src/shared/fileio.c
@@ -529,11 +529,11 @@ static void write_env_var(FILE *f, const char *v) {
         p++;
         fwrite(v, 1, p-v, f);
 
-        if (string_has_cc(p) || chars_intersect(p, WHITESPACE "\'\"\\")) {
+        if (string_has_cc(p) || chars_intersect(p, WHITESPACE "\'\"\\`$")) {
                 fputc('\"', f);
 
                 for (; *p; p++) {
-                        if (strchr("\'\"\\", *p))
+                        if (strchr("\'\"\\`$", *p))
                                 fputc('\\', f);
 
                         fputc(*p, f);