mirror of
https://github.com/sheumann/hush.git
synced 2024-12-21 23:29:34 +00:00
less: stop dying on bad regexps, quietly pipe data w/o
user interaction if stdout is not a tty. size optimizations
This commit is contained in:
parent
bf66fbc8e2
commit
e865e81d34
@ -14,9 +14,12 @@
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int bb_cat(char **argv)
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int bb_cat(char **argv)
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{
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{
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static char *const argv_dash[] = { "-", NULL };
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FILE *f;
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FILE *f;
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int retval = EXIT_SUCCESS;
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int retval = EXIT_SUCCESS;
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if (!*argv) argv = (char**) &argv_dash;
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do {
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do {
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f = fopen_or_warn_stdin(*argv);
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f = fopen_or_warn_stdin(*argv);
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if (f) {
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if (f) {
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@ -35,11 +38,6 @@ int bb_cat(char **argv)
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int cat_main(int argc, char **argv)
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int cat_main(int argc, char **argv)
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{
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{
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getopt32(argc, argv, "u");
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getopt32(argc, argv, "u");
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argv += optind;
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argv += optind;
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if (!*argv) {
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*--argv = "-";
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}
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return bb_cat(argv);
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return bb_cat(argv);
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}
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}
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@ -12,6 +12,7 @@
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#define __BB_REGEX__
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#define __BB_REGEX__
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#include <regex.h>
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#include <regex.h>
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extern void xregcomp(regex_t *preg, const char *regex, int cflags);
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char* regcomp_or_errmsg(regex_t *preg, const char *regex, int cflags);
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void xregcomp(regex_t *preg, const char *regex, int cflags);
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#endif
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#endif
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@ -11,13 +11,22 @@
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#include "libbb.h"
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#include "libbb.h"
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#include "xregex.h"
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#include "xregex.h"
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void xregcomp(regex_t *preg, const char *regex, int cflags)
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char* regcomp_or_errmsg(regex_t *preg, const char *regex, int cflags)
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{
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{
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int ret = regcomp(preg, regex, cflags);
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int ret = regcomp(preg, regex, cflags);
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if (ret) {
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if (ret) {
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int errmsgsz = regerror(ret, preg, NULL, 0);
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int errmsgsz = regerror(ret, preg, NULL, 0);
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char *errmsg = xmalloc(errmsgsz);
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char *errmsg = xmalloc(errmsgsz);
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regerror(ret, preg, errmsg, errmsgsz);
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regerror(ret, preg, errmsg, errmsgsz);
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return errmsg;
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}
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return NULL;
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}
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void xregcomp(regex_t *preg, const char *regex, int cflags)
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{
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char *errmsg = regcomp_or_errmsg(preg, regex, cflags);
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if (errmsg) {
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bb_error_msg_and_die("xregcomp: %s", errmsg);
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bb_error_msg_and_die("xregcomp: %s", errmsg);
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}
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}
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}
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}
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214
miscutils/less.c
214
miscutils/less.c
@ -50,9 +50,10 @@
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/* The escape codes for highlighted and normal text */
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/* The escape codes for highlighted and normal text */
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#define HIGHLIGHT "\033[7m"
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#define HIGHLIGHT "\033[7m"
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#define NORMAL "\033[0m"
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#define NORMAL "\033[0m"
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/* The escape code to clear the screen */
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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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#define CLEAR "\033[H\033[J"
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/* The escape code to clear to end of line */
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#define CLEAR_2_EOL "\033[K"
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#define MAXLINES CONFIG_FEATURE_LESS_MAXLINES
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#define MAXLINES CONFIG_FEATURE_LESS_MAXLINES
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@ -123,7 +124,7 @@ static int tless_getch(void)
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int input;
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int input;
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/* Set terminal input to raw mode (taken from vi.c) */
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/* Set terminal input to raw mode (taken from vi.c) */
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tcsetattr(fileno(inp), TCSANOW, &term_vi);
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tcsetattr(fileno(inp), TCSANOW, &term_vi);
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again:
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input = getc(inp);
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input = getc(inp);
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/* Detect escape sequences (i.e. arrow keys) and handle
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/* Detect escape sequences (i.e. arrow keys) and handle
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them accordingly */
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them accordingly */
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@ -136,27 +137,56 @@ static int tless_getch(void)
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i = input - REAL_KEY_UP;
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i = input - REAL_KEY_UP;
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if (i < 4)
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if (i < 4)
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return 20 + i;
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return 20 + i;
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else if ((i = input - REAL_PAGE_UP) < 4)
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i = input - REAL_PAGE_UP;
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if (i < 4)
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return 24 + i;
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return 24 + i;
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else
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return 0; /* ?? */
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return 0; /* ?? */
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}
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}
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/* The input is a normal ASCII value */
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/* Reject almost all control chars */
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if (input < ' ' && input != 0x0d && input != 8) goto again;
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set_tty_cooked();
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set_tty_cooked();
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return input;
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return input;
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}
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}
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static char* tless_gets(void)
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{
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int c;
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int i = 0;
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char *result = xzalloc(1);
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while (1) {
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c = tless_getch();
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if (c == 0x0d)
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return result;
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if (c == 0x7f) c = 8;
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if (c == 8 && i) {
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printf("\x8 \x8");
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i--;
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}
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if (c < ' ')
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continue;
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putchar(c);
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result[i++] = c;
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result = xrealloc(result, i+1);
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result[i] = '\0';
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if (i >= width-1) return result;
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}
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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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/* Move the cursor to a position (x,y), where (0,0) is the
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top-left corner of the console */
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top-left corner of the console */
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static void move_cursor(int x, int y)
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static void move_cursor(int line, int row)
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{
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{
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printf("\033[%i;%iH", x, y);
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printf("\033[%u;%uH", line, row);
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}
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}
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static void clear_line(void)
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static void clear_line(void)
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{
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{
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move_cursor(height, 0);
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printf("\033[%u;0H" CLEAR_2_EOL, height);
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printf("\033[K");
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}
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static void print_hilite(const char *str)
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{
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printf(HIGHLIGHT"%s"NORMAL, str);
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}
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}
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static void data_readlines(void)
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static void data_readlines(void)
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@ -235,26 +265,26 @@ static void m_status_print(void)
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if (!line_pos) {
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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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printf(HIGHLIGHT"%s (file %i of %i) lines %i-%i/%i ",
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filename, "(file ", current_file, " of ", num_files, ") lines ",
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filename, current_file, num_files,
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line_pos + 1, line_pos + height - 1, num_flines + 1);
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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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printf(HIGHLIGHT"%s lines %i-%i/%i ",
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filename, line_pos + 1, line_pos + height - 1,
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filename, line_pos + 1, line_pos + height - 1,
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num_flines + 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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printf(HIGHLIGHT" %s lines %i-%i/%i ", filename,
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line_pos + 1, line_pos + height - 1, num_flines + 1);
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line_pos + 1, line_pos + height - 1, num_flines + 1);
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}
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}
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if (line_pos >= num_flines - height + 2) {
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if (line_pos >= num_flines - height + 2) {
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printf("(END) %s", NORMAL);
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printf("(END) "NORMAL);
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if ((num_files > 1) && (current_file != num_files))
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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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printf(HIGHLIGHT"- Next: %s"NORMAL, files[current_file]);
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} else {
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} else {
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percentage = calc_percent();
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percentage = calc_percent();
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printf("%i%% %s", percentage, NORMAL);
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printf("%i%% "NORMAL, percentage);
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}
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}
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}
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}
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@ -265,11 +295,11 @@ static void medium_status_print(void)
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percentage = calc_percent();
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percentage = calc_percent();
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if (!line_pos)
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if (!line_pos)
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printf("%s%s %i%%%s", HIGHLIGHT, filename, percentage, NORMAL);
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printf(HIGHLIGHT"%s %i%%"NORMAL, filename, percentage);
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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(END)%s", HIGHLIGHT, NORMAL);
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print_hilite("(END)");
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else
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else
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printf("%s%i%%%s", HIGHLIGHT, percentage, NORMAL);
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printf(HIGHLIGHT"%i%%"NORMAL, percentage);
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}
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}
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#endif
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#endif
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@ -286,14 +316,14 @@ static void status_print(void)
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else {
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else {
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#endif
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#endif
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if (!line_pos) {
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if (!line_pos) {
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printf("%s%s %s", HIGHLIGHT, filename, NORMAL);
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print_hilite(filename);
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if (num_files > 1)
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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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printf(HIGHLIGHT"(file %i of %i)"NORMAL,
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current_file, " of ", num_files, ")", NORMAL);
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current_file, num_files);
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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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print_hilite("(END) ");
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if ((num_files > 1) && (current_file != num_files))
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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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printf(HIGHLIGHT"- Next: %s"NORMAL, files[current_file]);
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} else {
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} else {
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putchar(':');
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putchar(':');
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}
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}
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@ -336,13 +366,6 @@ static void print_found(const char *line)
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memset(p, '.', n);
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memset(p, '.', n);
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p += n;
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p += n;
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str += n;
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str += n;
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/*
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do {
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if (*str == '\x7f') { *p++ = '?'; str++; }
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else if (*str == '\x9b') { *p++ = '{'; str++; }
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else *p++ = ctrlconv[(unsigned char)*str++];
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} while (--n);
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*/
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}
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}
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strcpy(p, str);
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strcpy(p, str);
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@ -358,13 +381,11 @@ static void print_found(const char *line)
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goto start;
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goto start;
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while (match_status == 0) {
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while (match_status == 0) {
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char *new = xasprintf("%s" "%.*s" "%s" "%.*s" "%s",
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char *new = xasprintf("%s%.*s"HIGHLIGHT"%.*s"NORMAL,
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growline ? : "",
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growline ? : "",
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match_structs.rm_so, str,
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match_structs.rm_so, str,
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HIGHLIGHT,
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match_structs.rm_eo - match_structs.rm_so,
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match_structs.rm_eo - match_structs.rm_so,
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str + match_structs.rm_so,
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str + match_structs.rm_so);
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NORMAL);
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free(growline); growline = new;
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free(growline); growline = new;
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str += match_structs.rm_eo;
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str += match_structs.rm_eo;
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line += match_structs.rm_eo;
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line += match_structs.rm_eo;
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@ -375,10 +396,10 @@ static void print_found(const char *line)
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}
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}
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if (!growline) {
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if (!growline) {
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puts(str);
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printf("%s"CLEAR_2_EOL"\n", str);
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return;
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return;
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}
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}
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printf("%s%s\n", growline, str);
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printf("%s%s"CLEAR_2_EOL"\n", growline, str);
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free(growline);
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free(growline);
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}
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}
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@ -398,14 +419,20 @@ static void print_ascii(const char *str)
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n = strspn(str, controls);
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n = strspn(str, controls);
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p = buf;
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p = buf;
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do {
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do {
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if (*str == '\x7f') { *p++ = '?'; str++; }
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if (*str == 0x7f)
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else if (*str == '\x9b') { *p++ = '{'; str++; }
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*p++ = '?';
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else *p++ = ctrlconv[(unsigned char)*str++];
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else if (*str == 0x9b)
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/* VT100's CSI, aka Meta-ESC. Who's inventor? */
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/* I want to know who committed this sin */
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*p++ = '{';
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else
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*p++ = ctrlconv[(unsigned char)*str];
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str++;
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} while (--n);
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} while (--n);
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*p = '\0';
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*p = '\0';
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printf("%s%s%s", HIGHLIGHT, buf, NORMAL);
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print_hilite(buf);
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}
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}
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puts(str);
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printf("%s"CLEAR_2_EOL"\n", str);
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}
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}
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/* Print the buffer */
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/* Print the buffer */
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@ -413,12 +440,13 @@ static void buffer_print(void)
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{
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{
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int i;
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int i;
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printf("%s", CLEAR);
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move_cursor(0, 0);
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for (i = 0; i < height - 1; i++)
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for (i = 0; i < height - 1; i++)
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if (pattern_valid)
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if (pattern_valid)
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print_found(buffer[i]);
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print_found(buffer[i]);
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else
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else
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print_ascii(buffer[i]);
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print_ascii(buffer[i]);
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fputs(CLEAR_2_EOL, stdout); /* clears status line */
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status_print();
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status_print();
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}
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}
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@ -427,11 +455,6 @@ static void buffer_init(void)
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{
|
{
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int i;
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int i;
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|
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if (!buffer) {
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/* malloc the number of lines needed for the buffer */
|
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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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/* 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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end of the buffer is reached */
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for (i = 0; i < height - 1 && i <= num_flines; i++) {
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for (i = 0; i < height - 1 && i <= num_flines; i++) {
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@ -491,8 +514,10 @@ static void buffer_line(int linenum)
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|
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if (linenum < 0 || linenum > num_flines) {
|
if (linenum < 0 || linenum > num_flines) {
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clear_line();
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clear_line();
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printf("%s%s%i%s", HIGHLIGHT, "Cannot seek to line number ", linenum + 1, NORMAL);
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printf(HIGHLIGHT"%s%u"NORMAL, "Cannot seek to line ", linenum + 1);
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} else {
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return;
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|
}
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for (i = 0; i < height - 1; i++) {
|
for (i = 0; i < height - 1; i++) {
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if (linenum + i <= num_flines)
|
if (linenum + i <= num_flines)
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buffer[i] = flines[linenum + i];
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buffer[i] = flines[linenum + i];
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@ -503,7 +528,6 @@ static void buffer_line(int linenum)
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line_pos = linenum;
|
line_pos = linenum;
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buffer_print();
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buffer_print();
|
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}
|
}
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}
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/* Reinitialise everything for a new file - free the memory and start over */
|
/* Reinitialise everything for a new file - free the memory and start over */
|
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static void reinitialise(void)
|
static void reinitialise(void)
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@ -524,10 +548,13 @@ static void examine_file(void)
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clear_line();
|
clear_line();
|
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printf("Examine: ");
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printf("Examine: ");
|
||||||
free(filename);
|
free(filename);
|
||||||
filename = xmalloc_getline(inp);
|
filename = tless_gets();
|
||||||
|
/* files start by = argv. why we assume that argv is infinitely long??
|
||||||
files[num_files] = filename;
|
files[num_files] = filename;
|
||||||
current_file = num_files + 1;
|
current_file = num_files + 1;
|
||||||
num_files++;
|
num_files++; */
|
||||||
|
files[0] = filename;
|
||||||
|
current_file = 1;
|
||||||
reinitialise();
|
reinitialise();
|
||||||
}
|
}
|
||||||
|
|
||||||
@ -545,7 +572,7 @@ static void change_file(int direction)
|
|||||||
reinitialise();
|
reinitialise();
|
||||||
} else {
|
} else {
|
||||||
clear_line();
|
clear_line();
|
||||||
printf("%s%s%s", HIGHLIGHT, (direction > 0) ? "No next file" : "No previous file", NORMAL);
|
print_hilite((direction > 0) ? "No next file" : "No previous file");
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
@ -628,7 +655,7 @@ static void goto_match(int match)
|
|||||||
|
|
||||||
static void regex_process(void)
|
static void regex_process(void)
|
||||||
{
|
{
|
||||||
char *uncomp_regex;
|
char *uncomp_regex, *err;
|
||||||
|
|
||||||
/* Reset variables */
|
/* Reset variables */
|
||||||
match_lines = xrealloc(match_lines, sizeof(int));
|
match_lines = xrealloc(match_lines, sizeof(int));
|
||||||
@ -643,16 +670,22 @@ static void regex_process(void)
|
|||||||
/* Get the uncompiled regular expression from the user */
|
/* Get the uncompiled regular expression from the user */
|
||||||
clear_line();
|
clear_line();
|
||||||
putchar((option_mask32 & LESS_STATE_MATCH_BACKWARDS) ? '?' : '/');
|
putchar((option_mask32 & LESS_STATE_MATCH_BACKWARDS) ? '?' : '/');
|
||||||
uncomp_regex = xmalloc_getline(inp);
|
uncomp_regex = tless_gets();
|
||||||
if (!uncomp_regex || !uncomp_regex[0]) {
|
if (/*!uncomp_regex ||*/ !uncomp_regex[0]) {
|
||||||
free(uncomp_regex);
|
free(uncomp_regex);
|
||||||
buffer_print();
|
buffer_print();
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* Compile the regex and check for errors */
|
/* Compile the regex and check for errors */
|
||||||
xregcomp(&pattern, uncomp_regex, 0);
|
err = regcomp_or_errmsg(&pattern, uncomp_regex, 0);
|
||||||
free(uncomp_regex);
|
free(uncomp_regex);
|
||||||
|
if (err) {
|
||||||
|
clear_line();
|
||||||
|
fputs(err, stdout);
|
||||||
|
free(err);
|
||||||
|
return;
|
||||||
|
}
|
||||||
pattern_valid = 1;
|
pattern_valid = 1;
|
||||||
|
|
||||||
/* Run the regex on each line of the current file */
|
/* Run the regex on each line of the current file */
|
||||||
@ -799,7 +832,7 @@ static void show_flag_status(void)
|
|||||||
}
|
}
|
||||||
|
|
||||||
clear_line();
|
clear_line();
|
||||||
printf("%s%s%i%s", HIGHLIGHT, "The status of the flag is: ", flag_val != 0, NORMAL);
|
printf(HIGHLIGHT"%s%u"NORMAL, "The status of the flag is: ", flag_val != 0);
|
||||||
}
|
}
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
@ -820,12 +853,12 @@ static void save_input_to_file(void)
|
|||||||
|
|
||||||
clear_line();
|
clear_line();
|
||||||
printf("Log file: ");
|
printf("Log file: ");
|
||||||
current_line = xmalloc_getline(inp);
|
current_line = tless_gets();
|
||||||
if (strlen(current_line) > 0) {
|
if (strlen(current_line) > 0) {
|
||||||
fp = fopen(current_line, "w");
|
fp = fopen(current_line, "w");
|
||||||
free(current_line);
|
free(current_line);
|
||||||
if (!fp) {
|
if (!fp) {
|
||||||
printf("%s%s%s", HIGHLIGHT, "Error opening log file", NORMAL);
|
print_hilite("Error opening log file");
|
||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
for (i = 0; i < num_flines; i++)
|
for (i = 0; i < num_flines; i++)
|
||||||
@ -835,7 +868,7 @@ static void save_input_to_file(void)
|
|||||||
return;
|
return;
|
||||||
}
|
}
|
||||||
free(current_line);
|
free(current_line);
|
||||||
printf("%s%s%s", HIGHLIGHT, "No log file", NORMAL);
|
print_hilite("No log file");
|
||||||
}
|
}
|
||||||
|
|
||||||
#if ENABLE_FEATURE_LESS_MARKS
|
#if ENABLE_FEATURE_LESS_MARKS
|
||||||
@ -858,7 +891,7 @@ static void add_mark(void)
|
|||||||
num_marks++;
|
num_marks++;
|
||||||
} else {
|
} else {
|
||||||
clear_line();
|
clear_line();
|
||||||
printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL);
|
print_hilite("Invalid mark letter");
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
@ -878,10 +911,10 @@ static void goto_mark(void)
|
|||||||
buffer_line(mark_lines[i][1]);
|
buffer_line(mark_lines[i][1]);
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
if ((num_marks == 14) && (letter != mark_lines[14][0]))
|
if (num_marks == 14 && letter != mark_lines[14][0])
|
||||||
printf("%s%s%s", HIGHLIGHT, "Mark not set", NORMAL);
|
print_hilite("Mark not set");
|
||||||
} else
|
} else
|
||||||
printf("%s%s%s", HIGHLIGHT, "Invalid mark letter", NORMAL);
|
print_hilite("Invalid mark letter");
|
||||||
}
|
}
|
||||||
#endif
|
#endif
|
||||||
|
|
||||||
@ -911,22 +944,20 @@ static void match_right_bracket(char bracket)
|
|||||||
|
|
||||||
clear_line();
|
clear_line();
|
||||||
|
|
||||||
if (strchr(flines[line_pos], bracket) == NULL)
|
if (strchr(flines[line_pos], bracket) == NULL) {
|
||||||
printf("%s%s%s", HIGHLIGHT, "No bracket in top line", NORMAL);
|
print_hilite("No bracket in top line");
|
||||||
else {
|
return;
|
||||||
|
}
|
||||||
for (i = line_pos + 1; i < num_flines; i++) {
|
for (i = line_pos + 1; i < num_flines; i++) {
|
||||||
if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
|
if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
|
||||||
bracket_line = i;
|
bracket_line = i;
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
if (bracket_line == -1)
|
if (bracket_line == -1)
|
||||||
printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL);
|
print_hilite("No matching bracket found");
|
||||||
|
|
||||||
buffer_line(bracket_line - height + 2);
|
buffer_line(bracket_line - height + 2);
|
||||||
}
|
}
|
||||||
}
|
|
||||||
|
|
||||||
static void match_left_bracket(char bracket)
|
static void match_left_bracket(char bracket)
|
||||||
{
|
{
|
||||||
@ -936,30 +967,30 @@ static void match_left_bracket(char bracket)
|
|||||||
clear_line();
|
clear_line();
|
||||||
|
|
||||||
if (strchr(flines[line_pos + height - 2], bracket) == NULL) {
|
if (strchr(flines[line_pos + height - 2], bracket) == NULL) {
|
||||||
printf("%s%s%s", HIGHLIGHT, "No bracket in bottom line", NORMAL);
|
print_hilite("No bracket in bottom line");
|
||||||
printf("%s", flines[line_pos + height]);
|
/* ?? */
|
||||||
sleep(4);
|
/*printf("%s", flines[line_pos + height]);*/
|
||||||
} else {
|
/*sleep(4);*/
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
|
||||||
for (i = line_pos + height - 2; i >= 0; i--) {
|
for (i = line_pos + height - 2; i >= 0; i--) {
|
||||||
if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
|
if (strchr(flines[i], opp_bracket(bracket)) != NULL) {
|
||||||
bracket_line = i;
|
bracket_line = i;
|
||||||
break;
|
break;
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
if (bracket_line == -1)
|
if (bracket_line == -1)
|
||||||
printf("%s%s%s", HIGHLIGHT, "No matching bracket found", NORMAL);
|
print_hilite("No matching bracket found");
|
||||||
|
|
||||||
buffer_line(bracket_line);
|
buffer_line(bracket_line);
|
||||||
}
|
}
|
||||||
}
|
|
||||||
|
|
||||||
#endif /* FEATURE_LESS_BRACKETS */
|
#endif /* FEATURE_LESS_BRACKETS */
|
||||||
|
|
||||||
static void keypress_process(int keypress)
|
static void keypress_process(int keypress)
|
||||||
{
|
{
|
||||||
switch (keypress) {
|
switch (keypress) {
|
||||||
case KEY_DOWN: case 'e': case 'j': case '\015':
|
case KEY_DOWN: case 'e': case 'j': case 0x0d:
|
||||||
buffer_down(1);
|
buffer_down(1);
|
||||||
buffer_print();
|
buffer_print();
|
||||||
break;
|
break;
|
||||||
@ -1080,37 +1111,42 @@ int less_main(int argc, char **argv)
|
|||||||
files = argv;
|
files = argv;
|
||||||
num_files = argc;
|
num_files = argc;
|
||||||
|
|
||||||
|
/* Another popular pager, most, detects when stdout
|
||||||
|
* is not a tty and turns into cat. This makes sense. */
|
||||||
|
if (!isatty(STDOUT_FILENO))
|
||||||
|
return bb_cat(argv);
|
||||||
|
|
||||||
if (!num_files) {
|
if (!num_files) {
|
||||||
if (isatty(STDIN_FILENO)) {
|
if (isatty(STDIN_FILENO)) {
|
||||||
/* Just "less"? No file and no redirection? */
|
/* Just "less"? No args and no redirection? */
|
||||||
bb_error_msg("missing filename");
|
bb_error_msg("missing filename");
|
||||||
bb_show_usage();
|
bb_show_usage();
|
||||||
}
|
}
|
||||||
} else
|
} else
|
||||||
filename = xstrdup(files[0]);
|
filename = xstrdup(files[0]);
|
||||||
|
|
||||||
/* FIXME: another popular pager, most, detects when stdout
|
|
||||||
* is not a tty and turns into cat */
|
|
||||||
inp = xfopen(CURRENT_TTY, "r");
|
inp = xfopen(CURRENT_TTY, "r");
|
||||||
|
|
||||||
get_terminal_width_height(fileno(inp), &width, &height);
|
get_terminal_width_height(fileno(inp), &width, &height);
|
||||||
if (width < 10 || height < 3)
|
if (width < 10 || height < 3)
|
||||||
bb_error_msg_and_die("too narrow here");
|
bb_error_msg_and_die("too narrow here");
|
||||||
|
|
||||||
if (option_mask32 & FLAG_TILDE) empty_line_marker = "";
|
buffer = xmalloc(height * sizeof(char *));
|
||||||
|
if (option_mask32 & FLAG_TILDE)
|
||||||
|
empty_line_marker = "";
|
||||||
|
|
||||||
data_readlines();
|
data_readlines();
|
||||||
|
|
||||||
tcgetattr(fileno(inp), &term_orig);
|
tcgetattr(fileno(inp), &term_orig);
|
||||||
signal(SIGTERM, sig_catcher);
|
signal(SIGTERM, sig_catcher);
|
||||||
signal(SIGINT, sig_catcher);
|
signal(SIGINT, sig_catcher);
|
||||||
|
|
||||||
term_vi = term_orig;
|
term_vi = term_orig;
|
||||||
term_vi.c_lflag &= (~ICANON & ~ECHO);
|
term_vi.c_lflag &= (~ICANON & ~ECHO);
|
||||||
term_vi.c_iflag &= (~IXON & ~ICRNL);
|
term_vi.c_iflag &= (~IXON & ~ICRNL);
|
||||||
term_vi.c_oflag &= (~ONLCR);
|
term_vi.c_oflag &= (~ONLCR);
|
||||||
term_vi.c_cc[VMIN] = 1;
|
term_vi.c_cc[VMIN] = 1;
|
||||||
term_vi.c_cc[VTIME] = 0;
|
term_vi.c_cc[VTIME] = 0;
|
||||||
|
|
||||||
buffer_init();
|
buffer_init();
|
||||||
buffer_print();
|
buffer_print();
|
||||||
|
|
||||||
|
Loading…
Reference in New Issue
Block a user