less: somewhat buggy applet, but nice. Muchly reduced
xstrdup'ing and memory consumption. Made linewrap saner. regex matching code was awful - still buggy, but not as leaky as before. Made buffer size configurable. Killed several static and on-stack buffers. Hopefully eliminated staircase effect on Ctrl-C (unable to reproduce).
This commit is contained in:
Denis Vlasenko
parent
b95636c52f
commit
9a7cef930f
@ -13,7 +13,7 @@
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/* This function reads an entire line from a text file, up to a newline
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* or NUL byte, inclusive. It returns a malloc'ed char * which must be
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* stored and free'ed by the caller. If end is null '\n' isn't considered
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* stored and free'ed by the caller. If end is null '\n' isn't considered
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* end of line. If end isn't null, length of the chunk read is stored in it. */
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char *bb_get_chunk_from_file(FILE * file, int *end)
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@ -62,7 +62,7 @@ char *xmalloc_getline(FILE * file)
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char *c = bb_get_chunk_from_file(file, &i);
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if (i && c[--i] == '\n')
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c[i] = 0;
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c[i] = '\0';
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return c;
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}
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@ -133,6 +133,11 @@ config LESS
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'less' is a pager, meaning that it displays text files. It possesses
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a wide array of features, and is an improvement over 'more'.
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config FEATURE_LESS_MAXLINES
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int "Max number of input lines less will try to eat"
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default 9999999
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depends on LESS
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config FEATURE_LESS_BRACKETS
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bool "Enable bracket searching"
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default y
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413
miscutils/less.c
413
miscutils/less.c
@ -32,7 +32,7 @@
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#include "busybox.h"
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#ifdef CONFIG_FEATURE_LESS_REGEXP
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#if ENABLE_FEATURE_LESS_REGEXP
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#include "xregex.h"
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#endif
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@ -64,13 +64,12 @@
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/* The escape code to clear the screen */
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#define CLEAR "\033[H\033[J"
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/* Maximum number of lines in a file */
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#define MAXLINES 10000
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#define MAXLINES CONFIG_FEATURE_LESS_MAXLINES
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static int height;
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static int width;
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static char **files;
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static char filename[256];
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static char *filename;
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static char **buffer;
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static char **flines;
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static int current_file = 1;
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@ -79,24 +78,21 @@ static int num_flines;
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static int num_files = 1;
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/* Command line options */
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static unsigned flags;
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#define FLAG_E 1
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#define FLAG_M (1<<1)
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#define FLAG_m (1<<2)
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#define FLAG_N (1<<3)
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#define FLAG_TILDE (1<<4)
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/* hijack command line options variable for internal state vars */
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#define LESS_STATE_INP_STDIN (1<<5)
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#define LESS_STATE_PAST_EOF (1<<6)
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#define LESS_STATE_MATCH_BACKWARDS (1<<7)
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/* INP_STDIN is used to change behaviour when input comes from stdin */
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#define LESS_STATE_PAST_EOF (1<<5)
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#define LESS_STATE_MATCH_BACKWARDS (1<<6)
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#ifdef CONFIG_FEATURE_LESS_MARKS
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#if ENABLE_FEATURE_LESS_MARKS
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static int mark_lines[15][2];
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static int num_marks;
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#endif
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#ifdef CONFIG_FEATURE_LESS_REGEXP
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#if ENABLE_FEATURE_LESS_REGEXP
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static int match_found;
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static int *match_lines;
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static int match_pos;
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@ -143,7 +139,7 @@ static int tless_getch(void)
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them accordingly */
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if (input == '\033' && getc(inp) == '[') {
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unsigned int i;
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unsigned i;
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input = getc(inp);
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set_tty_cooked();
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@ -152,13 +148,12 @@ static int tless_getch(void)
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return 20 + i;
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else if ((i = input - REAL_PAGE_UP) < 4)
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return 24 + i;
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else
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return 0; /* ?? */
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}
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/* The input is a normal ASCII value */
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else {
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set_tty_cooked();
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return input;
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}
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return 0;
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set_tty_cooked();
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return input;
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}
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/* Move the cursor to a position (x,y), where (0,0) is the
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@ -174,51 +169,62 @@ static void clear_line(void)
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printf("\033[K");
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}
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/* This adds line numbers to every line, as the -N flag necessitates */
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static void add_linenumbers(void)
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{
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int i;
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for (i = 0; i <= num_flines; i++) {
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char *new = xasprintf("%5d %s", i + 1, flines[i]);
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free(flines[i]);
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flines[i] = new;
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}
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}
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static void data_readlines(void)
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{
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int i;
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char current_line[256];
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unsigned i;
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unsigned n = 1;
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int w = width;
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char *last_nl = (char*)1; /* "not NULL" */
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char *current_line;
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FILE *fp;
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fp = (flags & LESS_STATE_INP_STDIN) ? stdin : xfopen(filename, "r");
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fp = filename ? xfopen(filename, "r") : stdin;
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flines = NULL;
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for (i = 0; (feof(fp)==0) && (i <= MAXLINES); i++) {
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strcpy(current_line, "");
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fgets(current_line, 256, fp);
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if (option_mask32 & FLAG_N) {
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w -= 6;
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if (w < 1) w = 1; /* paranoia */
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}
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for (i = 0; !feof(fp) && i <= MAXLINES; i++) {
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flines = xrealloc(flines, (i+1) * sizeof(char *));
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current_line = xmalloc(w);
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again:
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current_line[0] = '\0';
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fgets(current_line, w, fp);
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if (fp != stdin)
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die_if_ferror(fp, filename);
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flines = xrealloc(flines, (i+1) * sizeof(char *));
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flines[i] = xstrdup(current_line);
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/* Corner case: linewrap with only '\n' wrapping */
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/* Looks ugly on screen, so we handle it specially */
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if (!last_nl && current_line[0] == '\n') {
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last_nl = (char*)1; /* "not NULL" */
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n++;
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goto again;
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}
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last_nl = last_char_is(current_line, '\n');
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if (last_nl)
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*last_nl = '\0';
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if (option_mask32 & FLAG_N) {
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flines[i] = xasprintf((n <= 99999) ? "%5u %s" : "%05u %s",
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n % 100000, current_line);
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free(current_line);
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if (last_nl)
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n++;
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} else {
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flines[i] = xrealloc(current_line, strlen(current_line)+1);
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}
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}
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num_flines = i - 2;
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/* Reset variables for a new file */
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line_pos = 0;
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flags &= ~LESS_STATE_PAST_EOF;
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option_mask32 &= ~LESS_STATE_PAST_EOF;
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fclose(fp);
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if (inp == NULL)
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inp = (flags & LESS_STATE_INP_STDIN) ? xfopen(CURRENT_TTY, "r") : stdin;
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if (flags & FLAG_N)
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add_linenumbers();
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}
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#ifdef CONFIG_FEATURE_LESS_FLAGS
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#if ENABLE_FEATURE_LESS_FLAGS
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/* Interestingly, writing calc_percent as a function and not a prototype saves around 32 bytes
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* on my build. */
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@ -232,19 +238,18 @@ static void m_status_print(void)
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{
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int percentage;
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if (!(flags & LESS_STATE_PAST_EOF)) {
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if (!(option_mask32 & LESS_STATE_PAST_EOF)) {
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if (!line_pos) {
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if (num_files > 1)
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if (num_files > 1) {
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printf("%s%s %s%i%s%i%s%i-%i/%i ", HIGHLIGHT,
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filename, "(file ", current_file, " of ", num_files, ") lines ",
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line_pos + 1, line_pos + height - 1, num_flines + 1);
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else {
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} else {
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printf("%s%s lines %i-%i/%i ", HIGHLIGHT,
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filename, line_pos + 1, line_pos + height - 1,
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num_flines + 1);
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}
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}
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else {
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} else {
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printf("%s %s lines %i-%i/%i ", HIGHLIGHT, filename,
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line_pos + 1, line_pos + height - 1, num_flines + 1);
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}
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@ -253,13 +258,11 @@ static void m_status_print(void)
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printf("(END) %s", NORMAL);
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if ((num_files > 1) && (current_file != num_files))
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printf("%s- Next: %s%s", HIGHLIGHT, files[current_file], NORMAL);
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}
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else {
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} else {
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percentage = calc_percent();
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printf("%i%% %s", percentage, NORMAL);
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}
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}
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else {
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} else {
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printf("%s%s lines %i-%i/%i (END) ", HIGHLIGHT, filename,
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line_pos + 1, num_flines + 1, num_flines + 1);
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if ((num_files > 1) && (current_file != num_files))
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@ -287,10 +290,10 @@ static void medium_status_print(void)
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static void status_print(void)
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{
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/* Change the status if flags have been set */
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#ifdef CONFIG_FEATURE_LESS_FLAGS
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if (flags & FLAG_M)
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#if ENABLE_FEATURE_LESS_FLAGS
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if (option_mask32 & FLAG_M)
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m_status_print();
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else if (flags & FLAG_m)
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else if (option_mask32 & FLAG_m)
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medium_status_print();
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/* No flags set */
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else {
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@ -300,16 +303,14 @@ static void status_print(void)
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if (num_files > 1)
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printf("%s%s%i%s%i%s%s", HIGHLIGHT, "(file ",
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current_file, " of ", num_files, ")", NORMAL);
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}
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else if (line_pos == num_flines - height + 2) {
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} else if (line_pos == num_flines - height + 2) {
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printf("%s%s %s", HIGHLIGHT, "(END)", NORMAL);
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if ((num_files > 1) && (current_file != num_files))
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printf("%s%s%s%s", HIGHLIGHT, "- Next: ", files[current_file], NORMAL);
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}
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else {
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} else {
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putchar(':');
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}
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#ifdef CONFIG_FEATURE_LESS_FLAGS
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#if ENABLE_FEATURE_LESS_FLAGS
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}
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#endif
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}
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@ -322,13 +323,12 @@ static void buffer_print(void)
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printf("%s", CLEAR);
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if (num_flines >= height - 2) {
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for (i = 0; i < height - 1; i++)
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printf("%s", buffer[i]);
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}
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else {
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printf("%.*s\n", width, buffer[i]);
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} else {
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for (i = 1; i < (height - 1 - num_flines); i++)
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putchar('\n');
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for (i = 0; i < height - 1; i++)
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printf("%s", buffer[i]);
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printf("%.*s\n", width, buffer[i]);
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}
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status_print();
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@ -341,21 +341,18 @@ static void buffer_init(void)
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if (buffer == NULL) {
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/* malloc the number of lines needed for the buffer */
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buffer = xrealloc(buffer, height * sizeof(char *));
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} else {
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for (i = 0; i < (height - 1); i++)
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free(buffer[i]);
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buffer = xmalloc(height * sizeof(char *));
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}
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/* Fill the buffer until the end of the file or the
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end of the buffer is reached */
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for (i = 0; (i < (height - 1)) && (i <= num_flines); i++) {
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buffer[i] = xstrdup(flines[i]);
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buffer[i] = flines[i];
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}
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/* If the buffer still isn't full, fill it with blank lines */
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for (; i < (height - 1); i++) {
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buffer[i] = xstrdup("");
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buffer[i] = "";
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}
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}
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@ -364,28 +361,25 @@ static void buffer_down(int nlines)
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{
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int i;
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if (!(flags & LESS_STATE_PAST_EOF)) {
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if (!(option_mask32 & LESS_STATE_PAST_EOF)) {
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if (line_pos + (height - 3) + nlines < num_flines) {
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line_pos += nlines;
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for (i = 0; i < (height - 1); i++) {
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free(buffer[i]);
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buffer[i] = xstrdup(flines[line_pos + i]);
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buffer[i] = flines[line_pos + i];
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}
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}
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else {
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} else {
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/* As the number of lines requested was too large, we just move
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to the end of the file */
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while (line_pos + (height - 3) + 1 < num_flines) {
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line_pos += 1;
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for (i = 0; i < (height - 1); i++) {
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free(buffer[i]);
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buffer[i] = xstrdup(flines[line_pos + i]);
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buffer[i] = flines[line_pos + i];
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}
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}
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}
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/* We exit if the -E flag has been set */
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if ((flags & FLAG_E) && (line_pos + (height - 2) == num_flines))
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if ((option_mask32 & FLAG_E) && (line_pos + (height - 2) == num_flines))
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tless_exit(0);
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}
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}
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@ -395,22 +389,19 @@ static void buffer_up(int nlines)
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int i;
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int tilde_line;
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if (!(flags & LESS_STATE_PAST_EOF)) {
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if (!(option_mask32 & LESS_STATE_PAST_EOF)) {
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if (line_pos - nlines >= 0) {
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line_pos -= nlines;
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for (i = 0; i < (height - 1); i++) {
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free(buffer[i]);
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buffer[i] = xstrdup(flines[line_pos + i]);
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buffer[i] = flines[line_pos + i];
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}
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}
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else {
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} else {
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/* As the requested number of lines to move was too large, we
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move one line up at a time until we can't. */
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while (line_pos != 0) {
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line_pos -= 1;
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for (i = 0; i < (height - 1); i++) {
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free(buffer[i]);
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buffer[i] = xstrdup(flines[line_pos + i]);
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buffer[i] = flines[line_pos + i];
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}
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}
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}
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@ -423,19 +414,17 @@ static void buffer_up(int nlines)
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/* Going backwards nlines lines has taken us to a point where
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nothing is past the EOF, so we revert to normal. */
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if (line_pos < num_flines - height + 3) {
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flags &= ~LESS_STATE_PAST_EOF;
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option_mask32 &= ~LESS_STATE_PAST_EOF;
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buffer_up(nlines);
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}
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else {
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} else {
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/* We only move part of the buffer, as the rest
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is past the EOF */
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for (i = 0; i < (height - 1); i++) {
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free(buffer[i]);
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if (i < tilde_line - nlines + 1)
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buffer[i] = xstrdup(flines[line_pos + i]);
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else {
|
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if (i < tilde_line - nlines + 1) {
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buffer[i] = flines[line_pos + i];
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} else {
|
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if (line_pos >= num_flines - height + 2)
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buffer[i] = xstrdup("~\n");
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buffer[i] = "~";
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}
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}
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}
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@ -445,7 +434,7 @@ static void buffer_up(int nlines)
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static void buffer_line(int linenum)
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{
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int i;
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flags &= ~LESS_STATE_PAST_EOF;
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option_mask32 &= ~LESS_STATE_PAST_EOF;
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|
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if (linenum < 0 || linenum > num_flines) {
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clear_line();
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@ -453,23 +442,20 @@ static void buffer_line(int linenum)
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}
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else if (linenum < (num_flines - height - 2)) {
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for (i = 0; i < (height - 1); i++) {
|
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free(buffer[i]);
|
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buffer[i] = xstrdup(flines[linenum + i]);
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buffer[i] = flines[linenum + i];
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}
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line_pos = linenum;
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buffer_print();
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}
|
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else {
|
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} else {
|
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for (i = 0; i < (height - 1); i++) {
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free(buffer[i]);
|
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if (linenum + i < num_flines + 2)
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buffer[i] = xstrdup(flines[linenum + i]);
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buffer[i] = flines[linenum + i];
|
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else
|
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buffer[i] = xstrdup((flags & FLAG_TILDE) ? "\n" : "~\n");
|
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buffer[i] = (option_mask32 & FLAG_TILDE) ? "" : "~";
|
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}
|
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line_pos = linenum;
|
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/* Set past_eof so buffer_down and buffer_up act differently */
|
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flags |= LESS_STATE_PAST_EOF;
|
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option_mask32 |= LESS_STATE_PAST_EOF;
|
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buffer_print();
|
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}
|
||||
}
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@ -490,22 +476,13 @@ static void reinitialise(void)
|
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|
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static void examine_file(void)
|
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{
|
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int newline_offset;
|
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|
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clear_line();
|
||||
printf("Examine: ");
|
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fgets(filename, 256, inp);
|
||||
|
||||
/* As fgets adds a newline to the end of an input string, we
|
||||
need to remove it */
|
||||
newline_offset = strlen(filename) - 1;
|
||||
filename[newline_offset] = '\0';
|
||||
|
||||
files[num_files] = xstrdup(filename);
|
||||
free(filename);
|
||||
filename = xmalloc_getline(inp);
|
||||
files[num_files] = filename;
|
||||
current_file = num_files + 1;
|
||||
num_files++;
|
||||
|
||||
flags &= ~LESS_STATE_INP_STDIN;
|
||||
reinitialise();
|
||||
}
|
||||
|
||||
@ -518,10 +495,10 @@ static void change_file(int direction)
|
||||
{
|
||||
if (current_file != ((direction > 0) ? num_files : 1)) {
|
||||
current_file = direction ? current_file + direction : 1;
|
||||
strcpy(filename, files[current_file - 1]);
|
||||
free(filename);
|
||||
filename = xstrdup(files[current_file - 1]);
|
||||
reinitialise();
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
clear_line();
|
||||
printf("%s%s%s", HIGHLIGHT, (direction > 0) ? "No next file" : "No previous file", NORMAL);
|
||||
}
|
||||
@ -537,8 +514,7 @@ static void remove_current_file(void)
|
||||
files[i - 2] = files[i - 1];
|
||||
num_files--;
|
||||
buffer_print();
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
change_file(1);
|
||||
for (i = 2; i <= num_files; i++)
|
||||
files[i - 2] = files[i - 1];
|
||||
@ -564,7 +540,7 @@ static void colon_process(void)
|
||||
case 'e':
|
||||
examine_file();
|
||||
break;
|
||||
#ifdef CONFIG_FEATURE_LESS_FLAGS
|
||||
#if ENABLE_FEATURE_LESS_FLAGS
|
||||
case 'f':
|
||||
clear_line();
|
||||
m_status_print();
|
||||
@ -587,7 +563,7 @@ static void colon_process(void)
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
||||
#if ENABLE_FEATURE_LESS_REGEXP
|
||||
/* The below two regular expression handler functions NEED development. */
|
||||
|
||||
/* Get a regular expression from the user, and then go through the current
|
||||
@ -595,48 +571,50 @@ static void colon_process(void)
|
||||
|
||||
static char *process_regex_on_line(char *line, regex_t *pattern, int action)
|
||||
{
|
||||
/* UNTESTED. LOOKED BUGGY AND LEAKY AS HELL. */
|
||||
/* FIXED. NEED TESTING. */
|
||||
/* 'line' should be either returned or free()ed */
|
||||
|
||||
/* This function takes the regex and applies it to the line.
|
||||
Each part of the line that matches has the HIGHLIGHT
|
||||
and NORMAL escape sequences placed around it by
|
||||
insert_highlights if action = 1, or has the escape sequences
|
||||
removed if action = 0, and then the line is returned. */
|
||||
int match_status;
|
||||
char *line2 = xmalloc((sizeof(char) * (strlen(line) + 1)) + 64);
|
||||
char *growline = "";
|
||||
char *line2 = line;
|
||||
char *growline = xstrdup("");
|
||||
char *ng;
|
||||
regmatch_t match_structs;
|
||||
|
||||
line2 = xstrdup(line);
|
||||
|
||||
match_found = 0;
|
||||
match_status = regexec(pattern, line2, 1, &match_structs, 0);
|
||||
|
||||
while (match_status == 0) {
|
||||
if (match_found == 0)
|
||||
match_found = 1;
|
||||
|
||||
match_found = 1;
|
||||
if (action) {
|
||||
growline = xasprintf("%s%.*s%s%.*s%s", growline,
|
||||
ng = xasprintf("%s%.*s%s%.*s%s", growline,
|
||||
match_structs.rm_so, line2, HIGHLIGHT,
|
||||
match_structs.rm_eo - match_structs.rm_so,
|
||||
line2 + match_structs.rm_so, NORMAL);
|
||||
}
|
||||
else {
|
||||
growline = xasprintf("%s%.*s%.*s", growline,
|
||||
} else {
|
||||
ng = xasprintf("%s%.*s%.*s", growline,
|
||||
match_structs.rm_so - 4, line2,
|
||||
match_structs.rm_eo - match_structs.rm_so,
|
||||
line2 + match_structs.rm_so);
|
||||
}
|
||||
|
||||
free(growline); growline = ng;
|
||||
line2 += match_structs.rm_eo;
|
||||
match_status = regexec(pattern, line2, 1, &match_structs, REG_NOTBOL);
|
||||
}
|
||||
|
||||
growline = xasprintf("%s%s", growline, line2);
|
||||
|
||||
return (match_found ? growline : line);
|
||||
|
||||
if (match_found) {
|
||||
ng = xasprintf("%s%s", growline, line2);
|
||||
free(line);
|
||||
} else {
|
||||
ng = line;
|
||||
}
|
||||
free(growline);
|
||||
free(line2);
|
||||
return ng;
|
||||
}
|
||||
|
||||
static void goto_match(int match)
|
||||
@ -651,35 +629,33 @@ static void goto_match(int match)
|
||||
|
||||
static void regex_process(void)
|
||||
{
|
||||
char uncomp_regex[100];
|
||||
char *current_line;
|
||||
char *uncomp_regex;
|
||||
int i;
|
||||
int j = 0;
|
||||
regex_t pattern;
|
||||
|
||||
/* Get the uncompiled regular expression from the user */
|
||||
clear_line();
|
||||
putchar((flags & LESS_STATE_MATCH_BACKWARDS) ? '?' : '/');
|
||||
uncomp_regex[0] = 0;
|
||||
fgets(uncomp_regex, sizeof(uncomp_regex), inp);
|
||||
|
||||
if (strlen(uncomp_regex) == 1) {
|
||||
putchar((option_mask32 & LESS_STATE_MATCH_BACKWARDS) ? '?' : '/');
|
||||
uncomp_regex = xmalloc_getline(inp);
|
||||
if (!uncomp_regex || !uncomp_regex[0]) {
|
||||
free(uncomp_regex);
|
||||
if (num_matches)
|
||||
goto_match((flags & LESS_STATE_MATCH_BACKWARDS)
|
||||
goto_match((option_mask32 & LESS_STATE_MATCH_BACKWARDS)
|
||||
? match_pos - 1 : match_pos + 1);
|
||||
else
|
||||
buffer_print();
|
||||
return;
|
||||
}
|
||||
uncomp_regex[strlen(uncomp_regex) - 1] = '\0';
|
||||
|
||||
/* Compile the regex and check for errors */
|
||||
xregcomp(&pattern, uncomp_regex, 0);
|
||||
free(uncomp_regex);
|
||||
|
||||
if (num_matches) {
|
||||
/* Get rid of all the highlights we added previously */
|
||||
for (i = 0; i <= num_flines; i++) {
|
||||
current_line = process_regex_on_line(flines[i], &old_pattern, 0);
|
||||
flines[i] = xstrdup(current_line);
|
||||
flines[i] = process_regex_on_line(flines[i], &old_pattern, 0);
|
||||
}
|
||||
}
|
||||
old_pattern = pattern;
|
||||
@ -692,8 +668,7 @@ static void regex_process(void)
|
||||
match_found = 0;
|
||||
/* Run the regex on each line of the current file here */
|
||||
for (i = 0; i <= num_flines; i++) {
|
||||
current_line = process_regex_on_line(flines[i], &pattern, 1);
|
||||
flines[i] = xstrdup(current_line);
|
||||
flines[i] = process_regex_on_line(flines[i], &pattern, 1);
|
||||
if (match_found) {
|
||||
match_lines = xrealloc(match_lines, (j + 1) * sizeof(int));
|
||||
match_lines[j] = i;
|
||||
@ -703,7 +678,7 @@ static void regex_process(void)
|
||||
|
||||
num_matches = j;
|
||||
if ((match_lines[0] != -1) && (num_flines > height - 2)) {
|
||||
if (flags & LESS_STATE_MATCH_BACKWARDS) {
|
||||
if (option_mask32 & LESS_STATE_MATCH_BACKWARDS) {
|
||||
for (i = 0; i < num_matches; i++) {
|
||||
if (match_lines[i] > line_pos) {
|
||||
match_pos = i - 1;
|
||||
@ -711,11 +686,9 @@ static void regex_process(void)
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
else
|
||||
} else
|
||||
buffer_line(match_lines[0]);
|
||||
}
|
||||
else
|
||||
} else
|
||||
buffer_init();
|
||||
}
|
||||
#endif
|
||||
@ -724,9 +697,8 @@ static void number_process(int first_digit)
|
||||
{
|
||||
int i = 1;
|
||||
int num;
|
||||
char num_input[80];
|
||||
char num_input[sizeof(int)*4]; /* more than enough */
|
||||
char keypress;
|
||||
char *endptr;
|
||||
|
||||
num_input[0] = first_digit;
|
||||
|
||||
@ -734,8 +706,11 @@ static void number_process(int first_digit)
|
||||
clear_line();
|
||||
printf(":%c", first_digit);
|
||||
|
||||
/* Receive input until a letter is given (max 80 chars)*/
|
||||
while((i < 80) && (num_input[i] = tless_getch()) && isdigit(num_input[i])) {
|
||||
/* Receive input until a letter is given */
|
||||
while (i < sizeof(num_input)-1) {
|
||||
num_input[i] = tless_getch();
|
||||
if (!num_input[i] || !isdigit(num_input[i]))
|
||||
break;
|
||||
putchar(num_input[i]);
|
||||
i++;
|
||||
}
|
||||
@ -743,8 +718,9 @@ static void number_process(int first_digit)
|
||||
/* Take the final letter out of the digits string */
|
||||
keypress = num_input[i];
|
||||
num_input[i] = '\0';
|
||||
num = strtol(num_input, &endptr, 10);
|
||||
if (endptr==num_input || *endptr!='\0' || num < 1 || num > MAXLINES) {
|
||||
num = bb_strtou(num_input, NULL, 10);
|
||||
/* on format error, num == -1 */
|
||||
if (num < 1 || num > MAXLINES) {
|
||||
buffer_print();
|
||||
return;
|
||||
}
|
||||
@ -764,16 +740,16 @@ static void number_process(int first_digit)
|
||||
case 'p': case '%':
|
||||
buffer_line(((num / 100) * num_flines) - 1);
|
||||
break;
|
||||
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
||||
#if ENABLE_FEATURE_LESS_REGEXP
|
||||
case 'n':
|
||||
goto_match(match_pos + num);
|
||||
break;
|
||||
case '/':
|
||||
flags &= ~LESS_STATE_MATCH_BACKWARDS;
|
||||
option_mask32 &= ~LESS_STATE_MATCH_BACKWARDS;
|
||||
regex_process();
|
||||
break;
|
||||
case '?':
|
||||
flags |= LESS_STATE_MATCH_BACKWARDS;
|
||||
option_mask32 |= LESS_STATE_MATCH_BACKWARDS;
|
||||
regex_process();
|
||||
break;
|
||||
#endif
|
||||
@ -782,7 +758,7 @@ static void number_process(int first_digit)
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FEATURE_LESS_FLAGCS
|
||||
#if ENABLE_FEATURE_LESS_FLAGCS
|
||||
static void flag_change(void)
|
||||
{
|
||||
int keypress;
|
||||
@ -793,16 +769,16 @@ static void flag_change(void)
|
||||
|
||||
switch (keypress) {
|
||||
case 'M':
|
||||
flags ^= FLAG_M;
|
||||
option_mask32 ^= FLAG_M;
|
||||
break;
|
||||
case 'm':
|
||||
flags ^= FLAG_m;
|
||||
option_mask32 ^= FLAG_m;
|
||||
break;
|
||||
case 'E':
|
||||
flags ^= FLAG_E;
|
||||
option_mask32 ^= FLAG_E;
|
||||
break;
|
||||
case '~':
|
||||
flags ^= FLAG_TILDE;
|
||||
option_mask32 ^= FLAG_TILDE;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
@ -820,19 +796,19 @@ static void show_flag_status(void)
|
||||
|
||||
switch (keypress) {
|
||||
case 'M':
|
||||
flag_val = flags & FLAG_M;
|
||||
flag_val = option_mask32 & FLAG_M;
|
||||
break;
|
||||
case 'm':
|
||||
flag_val = flags & FLAG_m;
|
||||
flag_val = option_mask32 & FLAG_m;
|
||||
break;
|
||||
case '~':
|
||||
flag_val = flags & FLAG_TILDE;
|
||||
flag_val = option_mask32 & FLAG_TILDE;
|
||||
break;
|
||||
case 'N':
|
||||
flag_val = flags & FLAG_N;
|
||||
flag_val = option_mask32 & FLAG_N;
|
||||
break;
|
||||
case 'E':
|
||||
flag_val = flags & FLAG_E;
|
||||
flag_val = option_mask32 & FLAG_E;
|
||||
break;
|
||||
default:
|
||||
flag_val = 0;
|
||||
@ -855,26 +831,31 @@ static void full_repaint(void)
|
||||
|
||||
static void save_input_to_file(void)
|
||||
{
|
||||
char current_line[256];
|
||||
char *current_line;
|
||||
int i;
|
||||
FILE *fp;
|
||||
|
||||
clear_line();
|
||||
printf("Log file: ");
|
||||
fgets(current_line, 256, inp);
|
||||
current_line[strlen(current_line) - 1] = '\0';
|
||||
if (strlen(current_line) > 1) {
|
||||
fp = xfopen(current_line, "w");
|
||||
current_line = xmalloc_getline(inp);
|
||||
if (strlen(current_line) > 0) {
|
||||
fp = fopen(current_line, "w");
|
||||
free(current_line);
|
||||
if (!fp) {
|
||||
printf("%s%s%s", HIGHLIGHT, "Error opening log file", NORMAL);
|
||||
return;
|
||||
}
|
||||
for (i = 0; i < num_flines; i++)
|
||||
fprintf(fp, "%s", flines[i]);
|
||||
fprintf(fp, "%s\n", flines[i]);
|
||||
fclose(fp);
|
||||
buffer_print();
|
||||
return;
|
||||
}
|
||||
else
|
||||
printf("%s%s%s", HIGHLIGHT, "No log file", NORMAL);
|
||||
free(current_line);
|
||||
printf("%s%s%s", HIGHLIGHT, "No log file", NORMAL);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_FEATURE_LESS_MARKS
|
||||
#if ENABLE_FEATURE_LESS_MARKS
|
||||
static void add_mark(void)
|
||||
{
|
||||
int letter;
|
||||
@ -892,8 +873,7 @@ static void add_mark(void)
|
||||
mark_lines[num_marks][0] = letter;
|
||||
mark_lines[num_marks][1] = line_pos;
|
||||
num_marks++;
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
clear_line();
|
||||
printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL);
|
||||
}
|
||||
@ -917,14 +897,13 @@ static void goto_mark(void)
|
||||
}
|
||||
if ((num_marks == 14) && (letter != mark_lines[14][0]))
|
||||
printf("%s%s%s", HIGHLIGHT, "Mark not set", NORMAL);
|
||||
}
|
||||
else
|
||||
} else
|
||||
printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL);
|
||||
}
|
||||
#endif
|
||||
|
||||
|
||||
#ifdef CONFIG_FEATURE_LESS_BRACKETS
|
||||
#if ENABLE_FEATURE_LESS_BRACKETS
|
||||
|
||||
static char opp_bracket(char bracket)
|
||||
{
|
||||
@ -977,8 +956,7 @@ static void match_left_bracket(char bracket)
|
||||
printf("%s%s%s", HIGHLIGHT, "No bracket in bottom line", NORMAL);
|
||||
printf("%s", flines[line_pos + height]);
|
||||
sleep(4);
|
||||
}
|
||||
else {
|
||||
} else {
|
||||
for (i = line_pos + height - 2; i >= 0; i--) {
|
||||
if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
|
||||
bracket_line = i;
|
||||
@ -993,7 +971,7 @@ static void match_left_bracket(char bracket)
|
||||
}
|
||||
}
|
||||
|
||||
#endif /* CONFIG_FEATURE_LESS_BRACKETS */
|
||||
#endif /* FEATURE_LESS_BRACKETS */
|
||||
|
||||
static void keypress_process(int keypress)
|
||||
{
|
||||
@ -1031,7 +1009,7 @@ static void keypress_process(int keypress)
|
||||
case 'q': case 'Q':
|
||||
tless_exit(0);
|
||||
break;
|
||||
#ifdef CONFIG_FEATURE_LESS_MARKS
|
||||
#if ENABLE_FEATURE_LESS_MARKS
|
||||
case 'm':
|
||||
add_mark();
|
||||
buffer_print();
|
||||
@ -1048,21 +1026,20 @@ static void keypress_process(int keypress)
|
||||
full_repaint();
|
||||
break;
|
||||
case 's':
|
||||
if (flags & LESS_STATE_INP_STDIN)
|
||||
save_input_to_file();
|
||||
save_input_to_file();
|
||||
break;
|
||||
case 'E':
|
||||
examine_file();
|
||||
break;
|
||||
#ifdef CONFIG_FEATURE_LESS_FLAGS
|
||||
#if ENABLE_FEATURE_LESS_FLAGS
|
||||
case '=':
|
||||
clear_line();
|
||||
m_status_print();
|
||||
break;
|
||||
#endif
|
||||
#ifdef CONFIG_FEATURE_LESS_REGEXP
|
||||
#if ENABLE_FEATURE_LESS_REGEXP
|
||||
case '/':
|
||||
flags &= ~LESS_STATE_MATCH_BACKWARDS;
|
||||
option_mask32 &= ~LESS_STATE_MATCH_BACKWARDS;
|
||||
regex_process();
|
||||
break;
|
||||
case 'n':
|
||||
@ -1072,11 +1049,11 @@ static void keypress_process(int keypress)
|
||||
goto_match(match_pos - 1);
|
||||
break;
|
||||
case '?':
|
||||
flags |= LESS_STATE_MATCH_BACKWARDS;
|
||||
option_mask32 |= LESS_STATE_MATCH_BACKWARDS;
|
||||
regex_process();
|
||||
break;
|
||||
#endif
|
||||
#ifdef CONFIG_FEATURE_LESS_FLAGCS
|
||||
#if ENABLE_FEATURE_LESS_FLAGCS
|
||||
case '-':
|
||||
flag_change();
|
||||
buffer_print();
|
||||
@ -1085,7 +1062,7 @@ static void keypress_process(int keypress)
|
||||
show_flag_status();
|
||||
break;
|
||||
#endif
|
||||
#ifdef CONFIG_FEATURE_LESS_BRACKETS
|
||||
#if ENABLE_FEATURE_LESS_BRACKETS
|
||||
case '{': case '(': case '[':
|
||||
match_right_bracket(keypress);
|
||||
break;
|
||||
@ -1104,30 +1081,42 @@ static void keypress_process(int keypress)
|
||||
number_process(keypress);
|
||||
}
|
||||
|
||||
int less_main(int argc, char **argv) {
|
||||
static void sig_catcher(int sig ATTRIBUTE_UNUSED)
|
||||
{
|
||||
set_tty_cooked();
|
||||
exit(1);
|
||||
}
|
||||
|
||||
int less_main(int argc, char **argv)
|
||||
{
|
||||
int keypress;
|
||||
|
||||
flags = getopt32(argc, argv, "EMmN~");
|
||||
|
||||
getopt32(argc, argv, "EMmN~");
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
files = argv;
|
||||
num_files = argc;
|
||||
|
||||
if (!num_files) {
|
||||
if (ttyname(STDIN_FILENO) == NULL)
|
||||
flags |= LESS_STATE_INP_STDIN;
|
||||
else {
|
||||
if (isatty(STDIN_FILENO)) {
|
||||
/* Just "less"? No file and no redirection? */
|
||||
bb_error_msg("missing filename");
|
||||
bb_show_usage();
|
||||
}
|
||||
}
|
||||
} else
|
||||
filename = xstrdup(files[0]);
|
||||
|
||||
strcpy(filename, (flags & LESS_STATE_INP_STDIN) ? bb_msg_standard_input : files[0]);
|
||||
get_terminal_width_height(0, &width, &height);
|
||||
/* FIXME: another popular pager, most, detects when stdout
|
||||
* is not a tty and turns into cat */
|
||||
inp = xfopen(CURRENT_TTY, "r");
|
||||
|
||||
get_terminal_width_height(fileno(inp), &width, &height);
|
||||
data_readlines();
|
||||
|
||||
signal(SIGTERM, sig_catcher);
|
||||
signal(SIGINT, sig_catcher);
|
||||
tcgetattr(fileno(inp), &term_orig);
|
||||
|
||||
term_vi = term_orig;
|
||||
term_vi.c_lflag &= (~ICANON & ~ECHO);
|
||||
term_vi.c_iflag &= (~IXON & ~ICRNL);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user