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/* |
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* Copyright (C) 1984-2012 Mark Nudelman |
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* Modified for use with illumos by Garrett D'Amore. |
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* Copyright 2014 Garrett D'Amore <garrett@damore.org> |
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* |
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* You may distribute under the terms of either the GNU General Public |
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* License or the Less License, as specified in the README file. |
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* |
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* For more information, see the README file. |
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*/ |
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/* |
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* Entry point, initialization, miscellaneous routines. |
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*/ |
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#include <sys/types.h> |
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#include <libgen.h> |
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#include <stdarg.h> |
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#include "less.h" |
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char *every_first_cmd = NULL; |
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int new_file; |
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int is_tty; |
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IFILE curr_ifile = NULL; |
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IFILE old_ifile = NULL; |
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struct scrpos initial_scrpos; |
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int any_display = FALSE; |
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off_t start_attnpos = -1; |
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off_t end_attnpos = -1; |
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int wscroll; |
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static char *progname; |
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int quitting; |
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int secure; |
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int dohelp; |
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int logfile = -1; |
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int force_logfile = FALSE; |
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char *namelogfile = NULL; |
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char *editor; |
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char *editproto; |
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extern char *tags; |
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extern char *tagoption; |
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extern int jump_sline; |
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extern int less_is_more; |
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extern int missing_cap; |
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extern int know_dumb; |
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extern int quit_if_one_screen; |
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extern int quit_at_eof; |
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extern int pr_type; |
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extern int hilite_search; |
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extern int use_lessopen; |
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extern int no_init; |
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extern int top_scroll; |
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extern int errmsgs; |
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/* |
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* Entry point. |
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*/ |
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int |
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main(int argc, char *argv[]) |
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{ |
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IFILE ifile; |
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char *s; |
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progname = basename(argv[0]); |
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argv++; |
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argc--; |
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/* |
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* If the name of the executable program is "more", |
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* act like LESS_IS_MORE is set. We have to set this as early |
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* as possible for POSIX. |
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*/ |
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✓✓ |
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if (strcmp(progname, "more") == 0) |
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less_is_more = 1; |
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else { |
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s = lgetenv("LESS_IS_MORE"); |
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✗✓✗✗
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if (s != NULL && *s != '\0') |
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less_is_more = 1; |
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} |
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secure = 0; |
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s = lgetenv("LESSSECURE"); |
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✗✓✗✗
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if (s != NULL && *s != '\0') |
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secure = 1; |
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✗✓ |
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if (secure) { |
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if (pledge("stdio rpath wpath tty flock cpath", NULL) == -1) { |
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perror("pledge"); |
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exit(1); |
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} |
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} else { |
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✗✓ |
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if (pledge("stdio rpath wpath cpath fattr proc exec tty flock", NULL) == -1) { |
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perror("pledge"); |
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exit(1); |
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} |
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} |
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/* |
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* Process command line arguments and LESS environment arguments. |
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* Command line arguments override environment arguments. |
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*/ |
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is_tty = isatty(1); |
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get_term(); |
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init_cmds(); |
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init_charset(); |
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init_line(); |
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init_cmdhist(); |
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init_option(); |
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init_search(); |
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init_prompt(); |
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✓✓ |
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if (less_is_more) { |
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/* this is specified by XPG */ |
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quit_at_eof = OPT_ON; |
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/* more users don't like the warning */ |
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know_dumb = OPT_ON; |
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/* default prompt is medium */ |
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pr_type = OPT_ON; |
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/* do not hilight search terms */ |
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hilite_search = OPT_OFF; |
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/* do not use LESSOPEN */ |
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use_lessopen = OPT_OFF; |
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/* do not set init strings to terminal */ |
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no_init = OPT_ON; |
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/* repaint from top of screen */ |
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top_scroll = OPT_OFF; |
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} |
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s = lgetenv(less_is_more ? "MORE" : "LESS"); |
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✗✓ |
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if (s != NULL) |
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scan_option(estrdup(s)); |
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#define isoptstring(s) (((s)[0] == '-' || (s)[0] == '+') && (s)[1] != '\0') |
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✓✓✓✓
✗✓✗✓
✓✓ |
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while (argc > 0 && (isoptstring(*argv) || isoptpending())) { |
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s = *argv++; |
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argc--; |
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✓✗ |
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if (strcmp(s, "--") == 0) |
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break; |
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scan_option(s); |
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} |
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#undef isoptstring |
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✗✓ |
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if (isoptpending()) { |
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/* |
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* Last command line option was a flag requiring a |
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* following string, but there was no following string. |
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*/ |
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nopendopt(); |
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quit(QUIT_OK); |
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} |
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✗✓ |
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if (errmsgs) { |
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quit(QUIT_ERROR); |
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} |
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✗✓ |
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if (less_is_more && quit_at_eof == OPT_ONPLUS) { |
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extern int no_init; |
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no_init = OPT_ON; |
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} |
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✗✓ |
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if (less_is_more && pr_type == OPT_ONPLUS) { |
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extern int quiet; |
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quiet = VERY_QUIET; |
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} |
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editor = lgetenv("VISUAL"); |
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✗✓✗✗
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if (editor == NULL || *editor == '\0') { |
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editor = lgetenv("EDITOR"); |
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✗✓✗✗
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if (editor == NULL || *editor == '\0') |
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editor = EDIT_PGM; |
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} |
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editproto = lgetenv("LESSEDIT"); |
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✗✓✗✗
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if (editproto == NULL || *editproto == '\0') |
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editproto = "%E ?lm+%lm. %f"; |
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/* |
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* Call get_ifile with all the command line filenames |
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* to "register" them with the ifile system. |
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*/ |
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ifile = NULL; |
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✗✓ |
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if (dohelp) |
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ifile = get_ifile(helpfile(), ifile); |
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✓✓ |
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while (argc-- > 0) { |
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char *filename; |
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filename = shell_quote(*argv); |
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✗✓ |
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if (filename == NULL) |
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filename = *argv; |
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argv++; |
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(void) get_ifile(filename, ifile); |
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ifile = prev_ifile(NULL); |
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free(filename); |
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} |
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/* |
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* Set up terminal, etc. |
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*/ |
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✗✓ |
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if (!is_tty) { |
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/* |
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* Output is not a tty. |
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* Just copy the input file(s) to output. |
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*/ |
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if (nifile() == 0) { |
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if (edit_stdin() == 0) |
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cat_file(); |
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} else if (edit_first() == 0) { |
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do { |
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cat_file(); |
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} while (edit_next(1) == 0); |
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} |
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quit(QUIT_OK); |
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} |
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✗✓ |
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if (missing_cap && !know_dumb) |
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error("WARNING: terminal is not fully functional", NULL); |
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init_mark(); |
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open_getchr(); |
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✗✓ |
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if (secure) |
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if (pledge("stdio rpath tty flock cpath wpath", NULL) == -1) { |
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perror("pledge"); |
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exit(1); |
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} |
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raw_mode(1); |
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init_signals(1); |
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/* |
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* Select the first file to examine. |
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*/ |
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✓✗✗✓
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if (tagoption != NULL || strcmp(tags, "-") == 0) { |
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/* |
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* A -t option was given. |
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* Verify that no filenames were also given. |
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* Edit the file selected by the "tags" search, |
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* and search for the proper line in the file. |
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*/ |
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if (nifile() > 0) { |
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error("No filenames allowed with -t option", NULL); |
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quit(QUIT_ERROR); |
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} |
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findtag(tagoption); |
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if (edit_tagfile()) /* Edit file which contains the tag */ |
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quit(QUIT_ERROR); |
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/* |
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* Search for the line which contains the tag. |
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* Set up initial_scrpos so we display that line. |
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*/ |
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initial_scrpos.pos = tagsearch(); |
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if (initial_scrpos.pos == -1) |
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quit(QUIT_ERROR); |
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initial_scrpos.ln = jump_sline; |
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✓✓ |
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} else if (nifile() == 0) { |
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✗✓ |
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if (edit_stdin()) /* Edit standard input */ |
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quit(QUIT_ERROR); |
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} else { |
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✓✓ |
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if (edit_first()) /* Edit first valid file in cmd line */ |
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quit(QUIT_ERROR); |
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} |
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init(); |
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commands(); |
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quit(QUIT_OK); |
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return (0); |
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} |
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/* |
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* Allocate memory. |
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* Like calloc(), but never returns an error (NULL). |
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*/ |
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void * |
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ecalloc(int count, unsigned int size) |
284 |
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{ |
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void *p; |
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62950 |
p = calloc(count, size); |
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✓✗ |
31475 |
if (p != NULL) |
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31475 |
return (p); |
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error("Cannot allocate memory", NULL); |
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quit(QUIT_ERROR); |
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return (NULL); |
293 |
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31475 |
} |
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295 |
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char * |
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easprintf(const char *fmt, ...) |
297 |
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{ |
298 |
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char *p = NULL; |
299 |
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int rv; |
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va_list ap; |
301 |
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|
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va_start(ap, fmt); |
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rv = vasprintf(&p, fmt, ap); |
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va_end(ap); |
305 |
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✗✓ |
36 |
if (p == NULL || rv < 0) { |
307 |
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error("Cannot allocate memory", NULL); |
308 |
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quit(QUIT_ERROR); |
309 |
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} |
310 |
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return (p); |
311 |
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} |
312 |
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313 |
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char * |
314 |
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estrdup(const char *str) |
315 |
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{ |
316 |
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char *n; |
317 |
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318 |
|
938 |
n = strdup(str); |
319 |
✗✓ |
469 |
if (n == NULL) { |
320 |
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error("Cannot allocate memory", NULL); |
321 |
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quit(QUIT_ERROR); |
322 |
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} |
323 |
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469 |
return (n); |
324 |
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} |
325 |
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326 |
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/* |
327 |
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* Skip leading spaces in a string. |
328 |
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*/ |
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char * |
330 |
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skipsp(char *s) |
331 |
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{ |
332 |
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while (*s == ' ' || *s == '\t') |
333 |
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s++; |
334 |
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return (s); |
335 |
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} |
336 |
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337 |
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/* |
338 |
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* See how many characters of two strings are identical. |
339 |
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* If uppercase is true, the first string must begin with an uppercase |
340 |
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* character; the remainder of the first string may be either case. |
341 |
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*/ |
342 |
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int |
343 |
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sprefix(char *ps, char *s, int uppercase) |
344 |
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{ |
345 |
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int c; |
346 |
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int sc; |
347 |
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int len = 0; |
348 |
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349 |
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for (; *s != '\0'; s++, ps++) { |
350 |
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c = *ps; |
351 |
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if (uppercase) { |
352 |
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if (len == 0 && islower(c)) |
353 |
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return (-1); |
354 |
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c = tolower(c); |
355 |
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} |
356 |
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sc = *s; |
357 |
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if (len > 0) |
358 |
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sc = tolower(sc); |
359 |
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if (c != sc) |
360 |
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break; |
361 |
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len++; |
362 |
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} |
363 |
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return (len); |
364 |
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} |
365 |
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|
366 |
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/* |
367 |
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* Exit the program. |
368 |
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*/ |
369 |
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void |
370 |
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quit(int status) |
371 |
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{ |
372 |
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static int save_status; |
373 |
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|
374 |
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/* |
375 |
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* Put cursor at bottom left corner, clear the line, |
376 |
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* reset the terminal modes, and exit. |
377 |
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*/ |
378 |
✗✓ |
78 |
if (status < 0) |
379 |
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status = save_status; |
380 |
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else |
381 |
|
39 |
save_status = status; |
382 |
|
39 |
quitting = 1; |
383 |
|
39 |
edit(NULL); |
384 |
✓✗ |
39 |
if (!secure) |
385 |
|
39 |
save_cmdhist(); |
386 |
✓✓ |
39 |
if (any_display && is_tty) |
387 |
|
37 |
clear_bot(); |
388 |
|
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deinit(); |
389 |
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flush(1); |
390 |
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raw_mode(0); |
391 |
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exit(status); |
392 |
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} |
393 |
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|
394 |
|
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char * |
395 |
|
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helpfile(void) |
396 |
|
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{ |
397 |
|
78 |
return (less_is_more ? HELPDIR "/more.help" : HELPDIR "/less.help"); |
398 |
|
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} |