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From beef22775206d99b06c95c9a015e1b17bf3e767f Mon Sep 17 00:00:00 2001
From: Jan Synacek <jsynacek@redhat.com>
Date: Thu, 23 Nov 2017 10:13:52 +0100
Subject: [PATCH] conf-parse: remove 4K line length limit
Let's use read_line() to solve our long line limitation.
Fixes #3302.
(cherry picked from commit e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af)
Resolves: #1503106
---
src/shared/conf-parser.c | 50 +++++++++++++++++++++++++++++++++++-------------
src/shared/utf8.h | 1 +
2 files changed, 38 insertions(+), 13 deletions(-)
diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
index 0b1af6c57..73e4d49ea 100644
--- a/src/shared/conf-parser.c
+++ b/src/shared/conf-parser.c
@@ -28,6 +28,8 @@
#include "conf-parser.h"
#include "conf-files.h"
+#include "def.h"
+#include "fileio.h"
#include "util.h"
#include "macro.h"
#include "strv.h"
@@ -339,7 +341,7 @@ int config_parse(const char *unit,
_cleanup_free_ char *section = NULL, *continuation = NULL;
_cleanup_fclose_ FILE *ours = NULL;
unsigned line = 0, section_line = 0;
- bool section_ignored = false;
+ bool section_ignored = false, allow_bom = true;
int r;
assert(filename);
@@ -359,21 +361,45 @@ int config_parse(const char *unit,
fd_warn_permissions(filename, fileno(f));
- while (!feof(f)) {
- char l[LINE_MAX], *p, *c = NULL, *e;
+ for (;;) {
+ _cleanup_free_ char *buf = NULL;
+ char *l, *p, *c = NULL, *e;
bool escaped = false;
- if (!fgets(l, sizeof(l), f)) {
- if (feof(f))
- break;
+ r = read_line(f, LONG_LINE_MAX, &buf);
+ if (r == 0)
+ break;
+ if (r == -ENOBUFS) {
+ if (warn)
+ log_error_errno(r, "%s:%u: Line too long", filename, line);
- log_error_errno(errno, "Failed to read configuration file '%s': %m", filename);
- return -errno;
+ return r;
+ }
+ if (r < 0) {
+ if (warn)
+ log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
+
+ return r;
}
- truncate_nl(l);
+ l = buf;
+ if (allow_bom) {
+ char *q;
+
+ q = startswith(buf, UTF8_BYTE_ORDER_MARK);
+ if (q) {
+ l = q;
+ allow_bom = false;
+ }
+ }
if (continuation) {
+ if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
+ if (warn)
+ log_error("%s:%u: Continuation line too long", filename, line);
+ return -ENOBUFS;
+ }
+
c = strappend(continuation, l);
if (!c) {
if (warn)
@@ -381,8 +407,7 @@ int config_parse(const char *unit,
return -ENOMEM;
}
- free(continuation);
- continuation = NULL;
+ continuation = mfree(continuation);
p = c;
} else
p = l;
@@ -428,8 +453,7 @@ int config_parse(const char *unit,
if (r < 0) {
if (warn)
- log_warning_errno(r, "Failed to parse file '%s': %m",
- filename);
+ log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
return r;
}
}
diff --git a/src/shared/utf8.h b/src/shared/utf8.h
index 77f663438..d31737061 100644
--- a/src/shared/utf8.h
+++ b/src/shared/utf8.h
@@ -26,6 +26,7 @@
#include "macro.h"
#define UTF8_REPLACEMENT_CHARACTER "\xef\xbf\xbd"
+#define UTF8_BYTE_ORDER_MARK "\xef\xbb\xbf"
const char *utf8_is_valid(const char *s) _pure_;
char *ascii_is_valid(const char *s) _pure_;