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From d8fabe7a6839eeb0d5d0504471f2d18b07545238 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Tue, 12 May 2020 18:53:35 +0200
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Subject: [PATCH] journald: rework end of line marker handling to use a field
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table
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(cherry picked from commit 549b7379ba404c33fd448d2bca46a57f6529b00b)
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Related: #2029426
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---
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src/journal/journald-stream.c | 29 ++++++++++++++++++++---------
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1 file changed, 20 insertions(+), 9 deletions(-)
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diff --git a/src/journal/journald-stream.c b/src/journal/journald-stream.c
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index c8de984335..58752a5a24 100644
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--- a/src/journal/journald-stream.c
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+++ b/src/journal/journald-stream.c
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@@ -54,6 +54,8 @@ typedef enum LineBreak {
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LINE_BREAK_NUL,
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LINE_BREAK_LINE_MAX,
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LINE_BREAK_EOF,
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+ _LINE_BREAK_MAX,
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+ _LINE_BREAK_INVALID = -1,
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} LineBreak;
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struct StdoutStream {
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@@ -233,7 +235,11 @@ fail:
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return log_error_errno(r, "Failed to save stream data %s: %m", s->state_file);
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}
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-static int stdout_stream_log(StdoutStream *s, const char *p, LineBreak line_break) {
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+static int stdout_stream_log(
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+ StdoutStream *s,
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+ const char *p,
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+ LineBreak line_break) {
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+
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struct iovec *iovec;
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int priority;
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char syslog_priority[] = "PRIORITY=\0";
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@@ -245,6 +251,9 @@ static int stdout_stream_log(StdoutStream *s, const char *p, LineBreak line_brea
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assert(s);
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assert(p);
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+ assert(line_break >= 0);
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+ assert(line_break < _LINE_BREAK_MAX);
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+
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if (s->context)
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(void) client_context_maybe_refresh(s->server, s->context, NULL, NULL, 0, NULL, USEC_INFINITY);
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else if (pid_is_valid(s->ucred.pid)) {
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@@ -296,17 +305,19 @@ static int stdout_stream_log(StdoutStream *s, const char *p, LineBreak line_brea
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iovec[n++] = IOVEC_MAKE_STRING(syslog_identifier);
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}
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- if (line_break != LINE_BREAK_NEWLINE) {
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- const char *c;
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+ static const char * const line_break_field_table[_LINE_BREAK_MAX] = {
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+ [LINE_BREAK_NEWLINE] = NULL, /* Do not add field if traditional newline */
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+ [LINE_BREAK_NUL] = "_LINE_BREAK=nul",
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+ [LINE_BREAK_LINE_MAX] = "_LINE_BREAK=line-max",
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+ [LINE_BREAK_EOF] = "_LINE_BREAK=eof",
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+ };
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- /* If this log message was generated due to an uncommon line break then mention this in the log
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- * entry */
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+ const char *c = line_break_field_table[line_break];
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- c = line_break == LINE_BREAK_NUL ? "_LINE_BREAK=nul" :
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- line_break == LINE_BREAK_LINE_MAX ? "_LINE_BREAK=line-max" :
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- "_LINE_BREAK=eof";
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+ /* If this log message was generated due to an uncommon line break then mention this in the log
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+ * entry */
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+ if (c)
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iovec[n++] = IOVEC_MAKE_STRING(c);
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- }
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message = strappend("MESSAGE=", p);
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if (message)
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