journalctl: add highlighting for matched substring
Red is used for highligting, the same as grep does. Except when the line is highlighted red already, because it has high priority, in which case plain ansi highlight is used for the matched substring. Coloring is implemented for short and cat outputs, and not for other types. I guess we could also add it for verbose output in the future.
This commit is contained in:
Zbigniew Jędrzejewski-Szmek
parent
61c5f8a1f0
commit
b4766d5f15
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@ -30,6 +30,7 @@
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#include "gunicode.h"
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#include "macro.h"
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#include "string-util.h"
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#include "terminal-util.h"
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#include "utf8.h"
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#include "util.h"
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@ -648,7 +649,17 @@ char *strreplace(const char *text, const char *old_string, const char *new_strin
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return ret;
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}
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char *strip_tab_ansi(char **ibuf, size_t *_isz) {
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static void advance_offsets(ssize_t diff, size_t offsets[2], size_t shift[2], size_t size) {
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if (!offsets)
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return;
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if ((size_t) diff < offsets[0])
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shift[0] += size;
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if ((size_t) diff < offsets[1])
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shift[1] += size;
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}
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char *strip_tab_ansi(char **ibuf, size_t *_isz, size_t highlight[2]) {
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const char *i, *begin = NULL;
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enum {
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STATE_OTHER,
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@ -656,7 +667,7 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) {
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STATE_BRACKET
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} state = STATE_OTHER;
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char *obuf = NULL;
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size_t osz = 0, isz;
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size_t osz = 0, isz, shift[2] = {};
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FILE *f;
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assert(ibuf);
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@ -684,15 +695,18 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) {
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break;
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else if (*i == '\x1B')
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state = STATE_ESCAPE;
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else if (*i == '\t')
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else if (*i == '\t') {
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fputs(" ", f);
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else
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advance_offsets(i - *ibuf, highlight, shift, 7);
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} else
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fputc(*i, f);
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break;
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case STATE_ESCAPE:
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if (i >= *ibuf + isz) { /* EOT */
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fputc('\x1B', f);
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advance_offsets(i - *ibuf, highlight, shift, 1);
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break;
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} else if (*i == '[') {
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state = STATE_BRACKET;
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@ -700,6 +714,7 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) {
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} else {
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fputc('\x1B', f);
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fputc(*i, f);
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advance_offsets(i - *ibuf, highlight, shift, 1);
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state = STATE_OTHER;
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}
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@ -711,6 +726,7 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) {
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(!(*i >= '0' && *i <= '9') && !IN_SET(*i, ';', 'm'))) {
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fputc('\x1B', f);
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fputc('[', f);
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advance_offsets(i - *ibuf, highlight, shift, 2);
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state = STATE_OTHER;
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i = begin-1;
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} else if (*i == 'm')
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@ -732,6 +748,11 @@ char *strip_tab_ansi(char **ibuf, size_t *_isz) {
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if (_isz)
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*_isz = osz;
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if (highlight) {
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highlight[0] += shift[0];
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highlight[1] += shift[1];
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}
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return obuf;
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}
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@ -177,7 +177,7 @@ char* strshorten(char *s, size_t l);
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char *strreplace(const char *text, const char *old_string, const char *new_string);
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char *strip_tab_ansi(char **p, size_t *l);
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char *strip_tab_ansi(char **ibuf, size_t *_isz, size_t highlight[2]);
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char *strextend_with_separator(char **x, const char *separator, ...) _sentinel_;
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@ -226,7 +226,8 @@ static ssize_t request_reader_entries(
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return MHD_CONTENT_READER_END_WITH_ERROR;
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}
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r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH, NULL, NULL);
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r = output_journal(m->tmp, m->journal, m->mode, 0, OUTPUT_FULL_WIDTH,
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NULL, NULL, NULL);
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if (r < 0) {
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log_error_errno(r, "Failed to serialize item: %m");
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return MHD_CONTENT_READER_END_WITH_ERROR;
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@ -2516,6 +2516,7 @@ int main(int argc, char *argv[]) {
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for (;;) {
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while (arg_lines < 0 || n_shown < arg_lines || (arg_follow && !first_line)) {
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int flags;
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size_t highlight[2] = {};
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if (need_seek) {
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if (!arg_reverse)
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@ -2574,6 +2575,7 @@ int main(int argc, char *argv[]) {
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_cleanup_(pcre2_match_data_freep) pcre2_match_data *md = NULL;
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const void *message;
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size_t len;
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PCRE2_SIZE *ovec;
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md = pcre2_match_data_create(1, NULL);
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if (!md)
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@ -2613,6 +2615,10 @@ int main(int argc, char *argv[]) {
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r = -EINVAL;
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goto finish;
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}
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ovec = pcre2_get_ovector_pointer(md);
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highlight[0] = ovec[0];
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highlight[1] = ovec[1];
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}
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#endif
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@ -2624,7 +2630,8 @@ int main(int argc, char *argv[]) {
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arg_utc * OUTPUT_UTC |
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arg_no_hostname * OUTPUT_NO_HOSTNAME;
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r = output_journal(stdout, j, arg_output, 0, flags, arg_output_fields, &ellipsized);
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r = output_journal(stdout, j, arg_output, 0, flags,
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arg_output_fields, highlight, &ellipsized);
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need_seek = true;
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if (r == -EADDRNOTAVAIL)
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break;
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@ -166,8 +166,17 @@ static bool shall_print(const char *p, size_t l, OutputFlags flags) {
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return true;
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}
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static bool print_multiline(FILE *f, unsigned prefix, unsigned n_columns, OutputFlags flags, int priority, const char* message, size_t message_len) {
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const char *color_on = "", *color_off = "";
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static bool print_multiline(
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FILE *f,
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unsigned prefix,
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unsigned n_columns,
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OutputFlags flags,
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int priority,
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const char* message,
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size_t message_len,
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size_t highlight[2]) {
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const char *color_on = "", *color_off = "", *highlight_on = "";
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const char *pos, *end;
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bool ellipsized = false;
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int line = 0;
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@ -176,9 +185,11 @@ static bool print_multiline(FILE *f, unsigned prefix, unsigned n_columns, Output
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if (priority <= LOG_ERR) {
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color_on = ANSI_HIGHLIGHT_RED;
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color_off = ANSI_NORMAL;
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highlight_on = ANSI_HIGHLIGHT;
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} else if (priority <= LOG_NOTICE) {
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color_on = ANSI_HIGHLIGHT;
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color_off = ANSI_NORMAL;
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highlight_on = ANSI_HIGHLIGHT_RED;
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}
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}
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@ -209,9 +220,28 @@ static bool print_multiline(FILE *f, unsigned prefix, unsigned n_columns, Output
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if (flags & (OUTPUT_FULL_WIDTH | OUTPUT_SHOW_ALL) ||
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(prefix + len + 1 < n_columns && !tail_line)) {
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fprintf(f, "%*s%s%.*s%s\n",
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continuation * prefix, "",
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color_on, len, pos, color_off);
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if (highlight &&
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(size_t) (pos - message) <= highlight[0] &&
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highlight[0] < (size_t) len) {
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fprintf(f, "%*s%s%.*s",
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continuation * prefix, "",
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color_on, (int) highlight[0], pos);
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fprintf(f, "%s%.*s",
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highlight_on,
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(int) (MIN((size_t) len, highlight[1]) - highlight[0]),
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pos + highlight[0]);
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if ((size_t) len > highlight[1])
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fprintf(f, "%s%.*s",
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color_on,
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(int) (len - highlight[1]),
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pos + highlight[1]);
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fprintf(f, "%s\n", color_off);
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} else
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fprintf(f, "%*s%s%.*s%s\n",
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continuation * prefix, "",
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color_on, len, pos, color_off);
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continue;
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}
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@ -369,7 +399,8 @@ static int output_short(
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OutputMode mode,
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unsigned n_columns,
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OutputFlags flags,
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Set *output_fields) {
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Set *output_fields,
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size_t highlight[2]) {
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int r;
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const void *data;
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@ -390,6 +421,7 @@ static int output_short(
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PARSE_FIELD_VEC_ENTRY("_SOURCE_REALTIME_TIMESTAMP=", &realtime, &realtime_len),
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PARSE_FIELD_VEC_ENTRY("_SOURCE_MONOTONIC_TIMESTAMP=", &monotonic, &monotonic_len),
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};
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size_t highlight_shifted[] = {highlight ? highlight[0] : 0, highlight ? highlight[1] : 0};
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assert(f);
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assert(j);
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@ -421,7 +453,7 @@ static int output_short(
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}
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if (!(flags & OUTPUT_SHOW_ALL))
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strip_tab_ansi(&message, &message_len);
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strip_tab_ansi(&message, &message_len, highlight_shifted);
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if (priority_len == 1 && *priority >= '0' && *priority <= '7')
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p = *priority - '0';
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@ -468,7 +500,9 @@ static int output_short(
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} else {
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fputs(": ", f);
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ellipsized |=
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print_multiline(f, n + 2, n_columns, flags, p, message, message_len);
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print_multiline(f, n + 2, n_columns, flags, p,
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message, message_len,
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highlight_shifted);
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}
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if (flags & OUTPUT_CATALOG)
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@ -483,7 +517,8 @@ static int output_verbose(
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OutputMode mode,
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unsigned n_columns,
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OutputFlags flags,
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Set *output_fields) {
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Set *output_fields,
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size_t highlight[2]) {
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const void *data;
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size_t length;
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@ -561,7 +596,7 @@ static int output_verbose(
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(((length < PRINT_CHAR_THRESHOLD) || flags & OUTPUT_FULL_WIDTH)
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&& utf8_is_printable(data, length))) {
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fprintf(f, " %s%.*s=", on, fieldlen, (const char*)data);
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print_multiline(f, 4 + fieldlen + 1, 0, OUTPUT_FULL_WIDTH, 0, c + 1, length - fieldlen - 1);
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print_multiline(f, 4 + fieldlen + 1, 0, OUTPUT_FULL_WIDTH, 0, c + 1, length - fieldlen - 1, NULL);
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fputs(off, f);
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} else {
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char bytes[FORMAT_BYTES_MAX];
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@ -590,7 +625,8 @@ static int output_export(
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OutputMode mode,
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unsigned n_columns,
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OutputFlags flags,
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Set *output_fields) {
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Set *output_fields,
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size_t highlight[2]) {
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sd_id128_t boot_id;
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char sid[33];
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@ -728,7 +764,8 @@ static int output_json(
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OutputMode mode,
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unsigned n_columns,
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OutputFlags flags,
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Set *output_fields) {
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Set *output_fields,
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size_t highlight[2]) {
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uint64_t realtime, monotonic;
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_cleanup_free_ char *cursor = NULL;
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@ -952,15 +989,22 @@ static int output_cat(
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OutputMode mode,
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unsigned n_columns,
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OutputFlags flags,
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Set *output_fields) {
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Set *output_fields,
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size_t highlight[2]) {
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const void *data;
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size_t l;
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int r;
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const char *highlight_on = "", *highlight_off = "";
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assert(j);
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assert(f);
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if (flags & OUTPUT_COLOR) {
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highlight_on = ANSI_HIGHLIGHT_RED;
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highlight_off = ANSI_NORMAL;
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}
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sd_journal_set_data_threshold(j, 0);
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r = sd_journal_get_data(j, "MESSAGE", &data, &l);
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@ -974,7 +1018,17 @@ static int output_cat(
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assert(l >= 8);
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fwrite((const char*) data + 8, 1, l - 8, f);
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if (highlight && (flags & OUTPUT_COLOR)) {
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assert(highlight[0] <= highlight[1]);
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assert(highlight[1] <= l - 8);
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fwrite((const char*) data + 8, 1, highlight[0], f);
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fwrite(highlight_on, 1, strlen(highlight_on), f);
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fwrite((const char*) data + 8 + highlight[0], 1, highlight[1] - highlight[0], f);
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fwrite(highlight_off, 1, strlen(highlight_off), f);
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fwrite((const char*) data + 8 + highlight[1], 1, l - 8 - highlight[1], f);
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} else
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fwrite((const char*) data + 8, 1, l - 8, f);
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fputc('\n', f);
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return 0;
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@ -986,7 +1040,8 @@ static int (*output_funcs[_OUTPUT_MODE_MAX])(
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OutputMode mode,
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unsigned n_columns,
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OutputFlags flags,
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Set *output_fields) = {
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Set *output_fields,
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size_t highlight[2]) = {
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[OUTPUT_SHORT] = output_short,
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[OUTPUT_SHORT_ISO] = output_short,
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@ -1010,6 +1065,7 @@ int output_journal(
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unsigned n_columns,
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OutputFlags flags,
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char **output_fields,
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size_t highlight[2],
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bool *ellipsized) {
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int ret;
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@ -1030,7 +1086,7 @@ int output_journal(
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return ret;
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}
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ret = output_funcs[mode](f, j, mode, n_columns, flags, fields);
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ret = output_funcs[mode](f, j, mode, n_columns, flags, fields, highlight);
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if (ellipsized && ret > 0)
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*ellipsized = true;
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@ -1112,7 +1168,7 @@ static int show_journal(FILE *f,
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line++;
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maybe_print_begin_newline(f, &flags);
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r = output_journal(f, j, mode, n_columns, flags, NULL, ellipsized);
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r = output_journal(f, j, mode, n_columns, flags, NULL, NULL, ellipsized);
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if (r < 0)
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return r;
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}
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@ -39,6 +39,7 @@ int output_journal(
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unsigned n_columns,
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OutputFlags flags,
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char **output_fields,
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size_t highlight[2],
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bool *ellipsized);
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int add_match_this_boot(sd_journal *j, const char *machine);
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@ -28,24 +28,24 @@ int main(int argc, char *argv[]) {
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char *p;
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assert_se(p = strdup("\tFoobar\tbar\twaldo\t"));
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assert_se(strip_tab_ansi(&p, NULL));
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assert_se(strip_tab_ansi(&p, NULL, NULL));
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fprintf(stdout, "<%s>\n", p);
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assert_se(streq(p, " Foobar bar waldo "));
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free(p);
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assert_se(p = strdup(ANSI_HIGHLIGHT "Hello" ANSI_NORMAL ANSI_HIGHLIGHT_RED " world!" ANSI_NORMAL));
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assert_se(strip_tab_ansi(&p, NULL));
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assert_se(strip_tab_ansi(&p, NULL, NULL));
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fprintf(stdout, "<%s>\n", p);
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assert_se(streq(p, "Hello world!"));
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free(p);
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assert_se(p = strdup("\x1B[\x1B[\t\x1B[" ANSI_HIGHLIGHT "\x1B[" "Hello" ANSI_NORMAL ANSI_HIGHLIGHT_RED " world!" ANSI_NORMAL));
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assert_se(strip_tab_ansi(&p, NULL));
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assert_se(strip_tab_ansi(&p, NULL, NULL));
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assert_se(streq(p, "\x1B[\x1B[ \x1B[\x1B[Hello world!"));
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free(p);
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assert_se(p = strdup("\x1B[waldo"));
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assert_se(strip_tab_ansi(&p, NULL));
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assert_se(strip_tab_ansi(&p, NULL, NULL));
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assert_se(streq(p, "\x1B[waldo"));
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free(p);
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