diff options
Diffstat (limited to 'util-linux/more.c')
| -rw-r--r-- | util-linux/more.c | 100 |
1 files changed, 49 insertions, 51 deletions
diff --git a/util-linux/more.c b/util-linux/more.c index 9f07633..6cdec72 100644 --- a/util-linux/more.c +++ b/util-linux/more.c @@ -9,6 +9,8 @@ * based on the original more implementation by Bruce, and code from the * Debian boot-floppies team. * + * Termios corrects by Vladimir Oleynik <vodz@usa.net> + * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or @@ -29,29 +31,26 @@ #include <fcntl.h> #include <signal.h> #include <stdlib.h> +#include <unistd.h> #include <sys/ioctl.h> #include "busybox.h" -/* ED: sparc termios is broken: revert back to old termio handling. */ -#ifdef BB_FEATURE_USE_TERMIOS -# if #cpu(sparc) -# include <termio.h> -# define termios termio -# define setTermSettings(fd,argp) ioctl(fd,TCSETAF,argp) -# define getTermSettings(fd,argp) ioctl(fd,TCGETA,argp) -# else -# include <termios.h> -# define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp) -# define getTermSettings(fd,argp) tcgetattr(fd, argp); -# endif - static FILE *cin; +#ifdef BB_FEATURE_USE_TERMIOS +#include <termios.h> +#define setTermSettings(fd,argp) tcsetattr(fd,TCSANOW,argp) +#define getTermSettings(fd,argp) tcgetattr(fd, argp); + static struct termios initial_settings, new_settings; -static void gotsig(int sig) +static void set_tty_to_initial_mode(void) { setTermSettings(fileno(cin), &initial_settings); +} + +static void gotsig(int sig) +{ putchar('\n'); exit(EXIT_FAILURE); } @@ -65,7 +64,7 @@ static int terminal_height = 24; extern int more_main(int argc, char **argv) { int c, lines, input = 0; - int please_display_more_prompt; + int please_display_more_prompt = -1; struct stat st; FILE *file; int len, page_height; @@ -77,46 +76,57 @@ extern int more_main(int argc, char **argv) argc--; argv++; - do { - if (argc == 0) { - file = stdin; - } else - file = xfopen(*argv, "r"); - fstat(fileno(file), &st); - -#ifdef BB_FEATURE_USE_TERMIOS + /* not use inputing from terminal if usage: more > outfile */ + if(isatty(fileno(stdout))) { cin = fopen("/dev/tty", "r"); if (!cin) cin = xfopen("/dev/console", "r"); + please_display_more_prompt = 0; +#ifdef BB_FEATURE_USE_TERMIOS getTermSettings(fileno(cin), &initial_settings); new_settings = initial_settings; - new_settings.c_cc[VMIN] = 1; - new_settings.c_cc[VTIME] = 0; new_settings.c_lflag &= ~ICANON; new_settings.c_lflag &= ~ECHO; +#ifndef linux + /* Hmm, in linux c_cc[] not parsed if set ~ICANON */ + new_settings.c_cc[VMIN] = 1; + new_settings.c_cc[VTIME] = 0; +#endif setTermSettings(fileno(cin), &new_settings); + atexit(set_tty_to_initial_mode); + (void) signal(SIGINT, gotsig); + (void) signal(SIGQUIT, gotsig); + (void) signal(SIGTERM, gotsig); +#endif + } + + do { + if (argc == 0) { + file = stdin; + } else + file = wfopen(*argv, "r"); + if(file==0) + goto loop; + + fstat(fileno(file), &st); -# ifdef BB_FEATURE_AUTOWIDTH + if(please_display_more_prompt>0) + please_display_more_prompt = 0; + +#if defined BB_FEATURE_AUTOWIDTH && defined BB_FEATURE_USE_TERMIOS ioctl(fileno(stdout), TIOCGWINSZ, &win); if (win.ws_row > 4) terminal_height = win.ws_row - 2; if (win.ws_col > 0) terminal_width = win.ws_col - 1; -# endif - - (void) signal(SIGINT, gotsig); - (void) signal(SIGQUIT, gotsig); - (void) signal(SIGTERM, gotsig); - #endif len=0; lines = 0; page_height = terminal_height; - please_display_more_prompt = 0; while ((c = getc(file)) != EOF) { - if (please_display_more_prompt) { + if (please_display_more_prompt>0) { len = printf("--More-- "); if (file != stdin) { #if _FILE_OFFSET_BITS == 64 @@ -129,13 +139,6 @@ extern int more_main(int argc, char **argv) (double) st.st_size)), (long)st.st_size); #endif } - len += printf("%s", -#ifdef BB_FEATURE_USE_TERMIOS - "" -#else - "\n" -#endif - ); fflush(stdout); @@ -143,20 +146,16 @@ extern int more_main(int argc, char **argv) * We've just displayed the "--More--" prompt, so now we need * to get input from the user. */ -#ifdef BB_FEATURE_USE_TERMIOS input = getc(cin); -#else - input = getc(stdin); +#ifndef BB_FEATURE_USE_TERMIOS + printf("\033[A"); /* up cursor */ #endif - -#ifdef BB_FEATURE_USE_TERMIOS /* Erase the "More" message */ putc('\r', stdout); while (--len >= 0) putc(' ', stdout); putc('\r', stdout); fflush(stdout); -#endif len=0; lines = 0; page_height = terminal_height; @@ -180,6 +179,7 @@ extern int more_main(int argc, char **argv) /* increment by just one line if we are at * the end of this line */ if (input == '\n') + if(please_display_more_prompt==0) please_display_more_prompt = 1; /* Adjust the terminal height for any overlap, so that * no lines get lost off the top. */ @@ -195,6 +195,7 @@ extern int more_main(int argc, char **argv) } } if (++lines >= page_height) { + if(please_display_more_prompt==0) please_display_more_prompt = 1; } len=0; @@ -208,12 +209,9 @@ extern int more_main(int argc, char **argv) } fclose(file); fflush(stdout); - +loop: argv++; } while (--argc > 0); end: -#ifdef BB_FEATURE_USE_TERMIOS - setTermSettings(fileno(cin), &initial_settings); -#endif return 0; } |