diff options
| -rw-r--r-- | libbb/get_line_from_file.c | 4 | ||||
| -rw-r--r-- | miscutils/Config.in | 5 | ||||
| -rw-r--r-- | miscutils/less.c | 413 |
3 files changed, 208 insertions, 214 deletions
diff --git a/libbb/get_line_from_file.c b/libbb/get_line_from_file.c index 3f2c609..a27693f 100644 --- a/libbb/get_line_from_file.c +++ b/libbb/get_line_from_file.c @@ -13,7 +13,7 @@ /* This function reads an entire line from a text file, up to a newline * or NUL byte, inclusive. It returns a malloc'ed char * which must be - * stored and free'ed by the caller. If end is null '\n' isn't considered + * stored and free'ed by the caller. If end is null '\n' isn't considered * end of line. If end isn't null, length of the chunk read is stored in it. */ char *bb_get_chunk_from_file(FILE * file, int *end) @@ -62,7 +62,7 @@ char *xmalloc_getline(FILE * file) char *c = bb_get_chunk_from_file(file, &i); if (i && c[--i] == '\n') - c[i] = 0; + c[i] = '\0'; return c; } diff --git a/miscutils/Config.in b/miscutils/Config.in index 90e2b6f..01d1fa0 100644 --- a/miscutils/Config.in +++ b/miscutils/Config.in @@ -133,6 +133,11 @@ config LESS 'less' is a pager, meaning that it displays text files. It possesses a wide array of features, and is an improvement over 'more'. +config FEATURE_LESS_MAXLINES + int "Max number of input lines less will try to eat" + default 9999999 + depends on LESS + config FEATURE_LESS_BRACKETS bool "Enable bracket searching" default y diff --git a/miscutils/less.c b/miscutils/less.c index 03ffd78..7350067 100644 --- a/miscutils/less.c +++ b/miscutils/less.c @@ -32,7 +32,7 @@ #include "busybox.h" -#ifdef CONFIG_FEATURE_LESS_REGEXP +#if ENABLE_FEATURE_LESS_REGEXP #include "xregex.h" #endif @@ -64,13 +64,12 @@ /* The escape code to clear the screen */ #define CLEAR "\033[H\033[J" -/* Maximum number of lines in a file */ -#define MAXLINES 10000 +#define MAXLINES CONFIG_FEATURE_LESS_MAXLINES static int height; static int width; static char **files; -static char filename[256]; +static char *filename; static char **buffer; static char **flines; static int current_file = 1; @@ -79,24 +78,21 @@ static int num_flines; static int num_files = 1; /* Command line options */ -static unsigned flags; #define FLAG_E 1 #define FLAG_M (1<<1) #define FLAG_m (1<<2) #define FLAG_N (1<<3) #define FLAG_TILDE (1<<4) /* hijack command line options variable for internal state vars */ -#define LESS_STATE_INP_STDIN (1<<5) -#define LESS_STATE_PAST_EOF (1<<6) -#define LESS_STATE_MATCH_BACKWARDS (1<<7) -/* INP_STDIN is used to change behaviour when input comes from stdin */ +#define LESS_STATE_PAST_EOF (1<<5) +#define LESS_STATE_MATCH_BACKWARDS (1<<6) -#ifdef CONFIG_FEATURE_LESS_MARKS +#if ENABLE_FEATURE_LESS_MARKS static int mark_lines[15][2]; static int num_marks; #endif -#ifdef CONFIG_FEATURE_LESS_REGEXP +#if ENABLE_FEATURE_LESS_REGEXP static int match_found; static int *match_lines; static int match_pos; @@ -143,7 +139,7 @@ static int tless_getch(void) them accordingly */ if (input == '\033' && getc(inp) == '[') { - unsigned int i; + unsigned i; input = getc(inp); set_tty_cooked(); @@ -152,13 +148,12 @@ static int tless_getch(void) return 20 + i; else if ((i = input - REAL_PAGE_UP) < 4) return 24 + i; + else + return 0; /* ?? */ } /* The input is a normal ASCII value */ - else { - set_tty_cooked(); - return input; - } - return 0; + set_tty_cooked(); + return input; } /* Move the cursor to a position (x,y), where (0,0) is the @@ -174,51 +169,62 @@ static void clear_line(void) printf("\033[K"); } -/* This adds line numbers to every line, as the -N flag necessitates */ -static void add_linenumbers(void) -{ - int i; - - for (i = 0; i <= num_flines; i++) { - char *new = xasprintf("%5d %s", i + 1, flines[i]); - free(flines[i]); - flines[i] = new; - } -} - static void data_readlines(void) { - int i; - char current_line[256]; + unsigned i; + unsigned n = 1; + int w = width; + char *last_nl = (char*)1; /* "not NULL" */ + char *current_line; FILE *fp; - fp = (flags & LESS_STATE_INP_STDIN) ? stdin : xfopen(filename, "r"); + fp = filename ? xfopen(filename, "r") : stdin; flines = NULL; - for (i = 0; (feof(fp)==0) && (i <= MAXLINES); i++) { - strcpy(current_line, ""); - fgets(current_line, 256, fp); + if (option_mask32 & FLAG_N) { + w -= 6; + if (w < 1) w = 1; /* paranoia */ + } + for (i = 0; !feof(fp) && i <= MAXLINES; i++) { + flines = xrealloc(flines, (i+1) * sizeof(char *)); + + current_line = xmalloc(w); + again: + current_line[0] = '\0'; + fgets(current_line, w, fp); if (fp != stdin) die_if_ferror(fp, filename); - flines = xrealloc(flines, (i+1) * sizeof(char *)); - flines[i] = xstrdup(current_line); + + /* Corner case: linewrap with only '\n' wrapping */ + /* Looks ugly on screen, so we handle it specially */ + if (!last_nl && current_line[0] == '\n') { + last_nl = (char*)1; /* "not NULL" */ + n++; + goto again; + } + last_nl = last_char_is(current_line, '\n'); + if (last_nl) + *last_nl = '\0'; + if (option_mask32 & FLAG_N) { + flines[i] = xasprintf((n <= 99999) ? "%5u %s" : "%05u %s", + n % 100000, current_line); + free(current_line); + if (last_nl) + n++; + } else { + flines[i] = xrealloc(current_line, strlen(current_line)+1); + } } num_flines = i - 2; /* Reset variables for a new file */ line_pos = 0; - flags &= ~LESS_STATE_PAST_EOF; + option_mask32 &= ~LESS_STATE_PAST_EOF; fclose(fp); - - if (inp == NULL) - inp = (flags & LESS_STATE_INP_STDIN) ? xfopen(CURRENT_TTY, "r") : stdin; - - if (flags & FLAG_N) - add_linenumbers(); } -#ifdef CONFIG_FEATURE_LESS_FLAGS +#if ENABLE_FEATURE_LESS_FLAGS /* Interestingly, writing calc_percent as a function and not a prototype saves around 32 bytes * on my build. */ @@ -232,19 +238,18 @@ static void m_status_print(void) { int percentage; - if (!(flags & LESS_STATE_PAST_EOF)) { + if (!(option_mask32 & LESS_STATE_PAST_EOF)) { if (!line_pos) { - if (num_files > 1) + if (num_files > 1) { printf("%s%s %s%i%s%i%s%i-%i/%i ", HIGHLIGHT, filename, "(file ", current_file, " of ", num_files, ") lines ", line_pos + 1, line_pos + height - 1, num_flines + 1); - else { + } else { printf("%s%s lines %i-%i/%i ", HIGHLIGHT, filename, line_pos + 1, line_pos + height - 1, num_flines + 1); } - } - else { + } else { printf("%s %s lines %i-%i/%i ", HIGHLIGHT, filename, line_pos + 1, line_pos + height - 1, num_flines + 1); } @@ -253,13 +258,11 @@ static void m_status_print(void) printf("(END) %s", NORMAL); if ((num_files > 1) && (current_file != num_files)) printf("%s- Next: %s%s", HIGHLIGHT, files[current_file], NORMAL); - } - else { + } else { percentage = calc_percent(); printf("%i%% %s", percentage, NORMAL); } - } - else { + } else { printf("%s%s lines %i-%i/%i (END) ", HIGHLIGHT, filename, line_pos + 1, num_flines + 1, num_flines + 1); if ((num_files > 1) && (current_file != num_files)) @@ -287,10 +290,10 @@ static void medium_status_print(void) static void status_print(void) { /* Change the status if flags have been set */ -#ifdef CONFIG_FEATURE_LESS_FLAGS - if (flags & FLAG_M) +#if ENABLE_FEATURE_LESS_FLAGS + if (option_mask32 & FLAG_M) m_status_print(); - else if (flags & FLAG_m) + else if (option_mask32 & FLAG_m) medium_status_print(); /* No flags set */ else { @@ -300,16 +303,14 @@ static void status_print(void) if (num_files > 1) printf("%s%s%i%s%i%s%s", HIGHLIGHT, "(file ", current_file, " of ", num_files, ")", NORMAL); - } - else if (line_pos == num_flines - height + 2) { + } else if (line_pos == num_flines - height + 2) { printf("%s%s %s", HIGHLIGHT, "(END)", NORMAL); if ((num_files > 1) && (current_file != num_files)) printf("%s%s%s%s", HIGHLIGHT, "- Next: ", files[current_file], NORMAL); - } - else { + } else { putchar(':'); } -#ifdef CONFIG_FEATURE_LESS_FLAGS +#if ENABLE_FEATURE_LESS_FLAGS } #endif } @@ -322,13 +323,12 @@ static void buffer_print(void) printf("%s", CLEAR); if (num_flines >= height - 2) { for (i = 0; i < height - 1; i++) - printf("%s", buffer[i]); - } - else { + printf("%.*s\n", width, buffer[i]); + } else { for (i = 1; i < (height - 1 - num_flines); i++) putchar('\n'); for (i = 0; i < height - 1; i++) - printf("%s", buffer[i]); + printf("%.*s\n", width, buffer[i]); } status_print(); @@ -341,21 +341,18 @@ static void buffer_init(void) if (buffer == NULL) { /* malloc the number of lines needed for the buffer */ - buffer = xrealloc(buffer, height * sizeof(char *)); - } else { - for (i = 0; i < (height - 1); i++) - free(buffer[i]); + buffer = xmalloc(height * sizeof(char *)); } /* Fill the buffer until the end of the file or the end of the buffer is reached */ for (i = 0; (i < (height - 1)) && (i <= num_flines); i++) { - buffer[i] = xstrdup(flines[i]); + buffer[i] = flines[i]; } /* If the buffer still isn't full, fill it with blank lines */ for (; i < (height - 1); i++) { - buffer[i] = xstrdup(""); + buffer[i] = ""; } } @@ -364,28 +361,25 @@ static void buffer_down(int nlines) { int i; - if (!(flags & LESS_STATE_PAST_EOF)) { + if (!(option_mask32 & LESS_STATE_PAST_EOF)) { if (line_pos + (height - 3) + nlines < num_flines) { line_pos += nlines; for (i = 0; i < (height - 1); i++) { - free(buffer[i]); - buffer[i] = xstrdup(flines[line_pos + i]); + buffer[i] = flines[line_pos + i]; } - } - else { + } else { /* As the number of lines requested was too large, we just move to the end of the file */ while (line_pos + (height - 3) + 1 < num_flines) { line_pos += 1; for (i = 0; i < (height - 1); i++) { - free(buffer[i]); - buffer[i] = xstrdup(flines[line_pos + i]); + buffer[i] = flines[line_pos + i]; } } } /* We exit if the -E flag has been set */ - if ((flags & FLAG_E) && (line_pos + (height - 2) == num_flines)) + if ((option_mask32 & FLAG_E) && (line_pos + (height - 2) == num_flines)) tless_exit(0); } } @@ -395,22 +389,19 @@ static void buffer_up(int nlines) int i; int tilde_line; - if (!(flags & LESS_STATE_PAST_EOF)) { + if (!(option_mask32 & LESS_STATE_PAST_EOF)) { if (line_pos - nlines >= 0) { line_pos -= nlines; for (i = 0; i < (height - 1); i++) { - free(buffer[i]); - buffer[i] = xstrdup(flines[line_pos + i]); + buffer[i] = flines[line_pos + i]; } - } - else { + } else { /* As the requested number of lines to move was too large, we move one line up at a time until we can't. */ while (line_pos != 0) { line_pos -= 1; for (i = 0; i < (height - 1); i++) { - free(buffer[i]); - buffer[i] = xstrdup(flines[line_pos + i]); + buffer[i] = flines[line_pos + i]; } } } @@ -423,19 +414,17 @@ static void buffer_up(int nlines) /* Going backwards nlines lines has taken us to a point where nothing is past the EOF, so we revert to normal. */ if (line_pos < num_flines - height + 3) { - flags &= ~LESS_STATE_PAST_EOF; + option_mask32 &= ~LESS_STATE_PAST_EOF; buffer_up(nlines); - } - else { + } else { /* We only move part of the buffer, as the rest is past the EOF */ for (i = 0; i < (height - 1); i++) { - free(buffer[i]); - if (i < tilde_line - nlines + 1) - buffer[i] = xstrdup(flines[line_pos + i]); - else { + if (i < tilde_line - nlines + 1) { + buffer[i] = flines[line_pos + i]; + } else { if (line_pos >= num_flines - height + 2) - buffer[i] = xstrdup("~\n"); + buffer[i] = "~"; } } } @@ -445,7 +434,7 @@ static void buffer_up(int nlines) static void buffer_line(int linenum) { int i; - flags &= ~LESS_STATE_PAST_EOF; + option_mask32 &= ~LESS_STATE_PAST_EOF; if (linenum < 0 || linenum > num_flines) { clear_line(); @@ -453,23 +442,20 @@ static void buffer_line(int linenum) } else if (linenum < (num_flines - height - 2)) { for (i = 0; i < (height - 1); i++) { - free(buffer[i]); - buffer[i] = xstrdup(flines[linenum + i]); + buffer[i] = flines[linenum + i]; } line_pos = linenum; buffer_print(); - } - else { + } else { for (i = 0; i < (height - 1); i++) { - free(buffer[i]); if (linenum + i < num_flines + 2) - buffer[i] = xstrdup(flines[linenum + i]); + buffer[i] = flines[linenum + i]; else - buffer[i] = xstrdup((flags & FLAG_TILDE) ? "\n" : "~\n"); + buffer[i] = (option_mask32 & FLAG_TILDE) ? "" : "~"; } line_pos = linenum; /* Set past_eof so buffer_down and buffer_up act differently */ - flags |= LESS_STATE_PAST_EOF; + option_mask32 |= LESS_STATE_PAST_EOF; buffer_print(); } } @@ -490,22 +476,13 @@ static void reinitialise(void) static void examine_file(void) { - int newline_offset; - clear_line(); printf("Examine: "); - 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]); + + /* FIXME: another popular pager, most, detects when stdout + * is not a tty and turns into cat */ + inp = xfopen(CURRENT_TTY, "r"); - strcpy(filename, (flags & LESS_STATE_INP_STDIN) ? bb_msg_standard_input : files[0]); - get_terminal_width_height(0, &width, &height); + 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); |