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From beef22775206d99b06c95c9a015e1b17bf3e767f Mon Sep 17 00:00:00 2001
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From: Jan Synacek <jsynacek@redhat.com>
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Date: Thu, 23 Nov 2017 10:13:52 +0100
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Subject: [PATCH] conf-parse: remove 4K line length limit
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Let's use read_line() to solve our long line limitation.
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Fixes #3302.
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(cherry picked from commit e6dde451a51dc5aaa7f4d98d39b8fe735f73d2af)
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Resolves: #1503106
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---
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src/shared/conf-parser.c | 50 +++++++++++++++++++++++++++++-----------
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src/shared/utf8.h | 1 +
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2 files changed, 38 insertions(+), 13 deletions(-)
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diff --git a/src/shared/conf-parser.c b/src/shared/conf-parser.c
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index 0b1af6c577..73e4d49ea1 100644
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--- a/src/shared/conf-parser.c
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+++ b/src/shared/conf-parser.c
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@@ -28,6 +28,8 @@
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#include "conf-parser.h"
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#include "conf-files.h"
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+#include "def.h"
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+#include "fileio.h"
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#include "util.h"
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#include "macro.h"
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#include "strv.h"
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@@ -339,7 +341,7 @@ int config_parse(const char *unit,
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_cleanup_free_ char *section = NULL, *continuation = NULL;
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_cleanup_fclose_ FILE *ours = NULL;
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unsigned line = 0, section_line = 0;
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- bool section_ignored = false;
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+ bool section_ignored = false, allow_bom = true;
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int r;
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assert(filename);
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@@ -359,21 +361,45 @@ int config_parse(const char *unit,
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fd_warn_permissions(filename, fileno(f));
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- while (!feof(f)) {
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- char l[LINE_MAX], *p, *c = NULL, *e;
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+ for (;;) {
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+ _cleanup_free_ char *buf = NULL;
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+ char *l, *p, *c = NULL, *e;
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bool escaped = false;
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- if (!fgets(l, sizeof(l), f)) {
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- if (feof(f))
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- break;
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+ r = read_line(f, LONG_LINE_MAX, &buf;;
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+ if (r == 0)
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+ break;
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+ if (r == -ENOBUFS) {
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+ if (warn)
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+ log_error_errno(r, "%s:%u: Line too long", filename, line);
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- log_error_errno(errno, "Failed to read configuration file '%s': %m", filename);
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- return -errno;
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+ return r;
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+ }
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+ if (r < 0) {
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+ if (warn)
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+ log_error_errno(r, "%s:%u: Error while reading configuration file: %m", filename, line);
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+
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+ return r;
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}
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- truncate_nl(l);
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+ l = buf;
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+ if (allow_bom) {
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+ char *q;
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+
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+ q = startswith(buf, UTF8_BYTE_ORDER_MARK);
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+ if (q) {
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+ l = q;
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+ allow_bom = false;
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+ }
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+ }
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if (continuation) {
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+ if (strlen(continuation) + strlen(l) > LONG_LINE_MAX) {
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+ if (warn)
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+ log_error("%s:%u: Continuation line too long", filename, line);
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+ return -ENOBUFS;
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+ }
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+
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c = strappend(continuation, l);
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if (!c) {
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if (warn)
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@@ -381,8 +407,7 @@ int config_parse(const char *unit,
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return -ENOMEM;
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}
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- free(continuation);
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- continuation = NULL;
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+ continuation = mfree(continuation);
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p = c;
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} else
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p = l;
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@@ -428,8 +453,7 @@ int config_parse(const char *unit,
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if (r < 0) {
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if (warn)
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- log_warning_errno(r, "Failed to parse file '%s': %m",
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- filename);
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+ log_warning_errno(r, "%s:%u: Failed to parse file: %m", filename, line);
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return r;
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}
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}
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diff --git a/src/shared/utf8.h b/src/shared/utf8.h
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index 77f663438e..d31737061c 100644
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--- a/src/shared/utf8.h
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+++ b/src/shared/utf8.h
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@@ -26,6 +26,7 @@
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#include "macro.h"
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#define UTF8_REPLACEMENT_CHARACTER "\xef\xbf\xbd"
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+#define UTF8_BYTE_ORDER_MARK "\xef\xbb\xbf"
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const char *utf8_is_valid(const char *s) _pure_;
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char *ascii_is_valid(const char *s) _pure_;
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