Moved config.h -> bb.h and did some cleanup, moving function
declarations and constants out of bb.c and into bb.h. Also re-alphabetized the functions and updated the docs.
This commit is contained in:
parent
f0c32a9047
commit
3daa54df98
17
API.md
17
API.md
@ -1,4 +1,5 @@
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# BB's API
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In `bb`, all interaction (more or less) occurs through binding keypresses
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(and mouse events) to shell scripts. These shell scripts can perform external
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actions (like moving files around) or internal actions (like changing the
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@ -7,6 +8,7 @@ temporary file, and scripts may write commands to this file to modify `bb`'s
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internal state.
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## Helper Functions
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- `bb`: used for modifying `bb`'s internal state (see BB Commands).
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- `ask`: get user input in a standardized and customizable way. The first
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argument is a variable where the value is stored. The second argument is
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@ -21,6 +23,7 @@ internal state.
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(e.g. `spin sleep 5`).
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## Environment Variables
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For startup commands and key bindings, the following values are provided as
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environment variables:
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@ -32,6 +35,7 @@ environment variables:
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- `$BBCMD`: a file to which `bb` commands can be written (used internally)
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## BB Internal State Commands
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In order to modify bb's internal state, you can call `bb +cmd`, where "cmd"
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is one of the following commands (or a unique prefix of one):
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@ -63,7 +67,14 @@ absolute value or a relative value (starting with `+` or `-`), and/or a percent
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and `%n` means percent of number of files (e.g. `+50%` means half a screen
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height down, and `100%n` means the last file)
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Internally, `bb` will write the commands (NUL terminated) to a file whose path
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is in`$BBCMD` and read the file when `bb` resumes. These commands can also be
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passed to bb at startup, and will run immediately. E.g. `bb '+col:n'
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## Final Notes
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Internally, `bb` writes the commands (NUL terminated) to a file whose path is
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in`$BBCMD` and reads from that file when `bb` resumes. These commands can also
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be passed to bb at startup, and will run immediately. E.g. `bb '+col:n'
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'+sort:+r' .` will launch `bb` only showing the name column, randomly sorted.
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`bb` also optimizes any scripts that only contain just a `bb` command and no
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shell variables, other commands, etc. (e.g. `bb +move:+1`) These
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`bb`-command-only scripts directly modify `bb`'s internal state without
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spawning a shell, so they're much faster and avoid flickering the screen.
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2
Makefile
2
Makefile
@ -57,7 +57,7 @@ all: $(NAME)
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clean:
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rm -f $(NAME)
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$(NAME): $(NAME).c bterm.h config.h
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$(NAME): $(NAME).c bterm.h bb.h
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$(CC) $(NAME).c $(CFLAGS) $(CWARN) $(G) $(O) -o $(NAME)
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install: $(NAME)
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46
README.md
46
README.md
@ -11,6 +11,7 @@
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## Building
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No dependencies besides `make` and a C compiler, just:
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make
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@ -41,46 +42,39 @@ Pressing `Ctrl-c` will cause `bb` to exit with a failure status and without
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printing anything.
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## bb's Philosophy
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The core idea behind `bb` is that `bb` is a file **browser**, not a file
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**manager**, which means `bb` uses shell scripts to perform all modifications
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to the filesystem (passing selected files as arguments), rather than
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reinventing the wheel by hard-coding operations like `rm`, `mv`, `cp`, `touch`,
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and so on. Shell scripts can be bound to keypresses in config.h (the user's
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version of [the defaults in config.def.h](config.def.h)). For example, `p` is
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bound to `$PAGER "$@"`, which means selecting `file1` and `file2`, then
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pressing `p` will cause `bb` to run the shell command `$PAGER file1 file2`.
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and so on. Shell scripts can be bound to keypresses in
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`~/.config/bb/bindings.bb`. For example, `p` is bound to `$PAGER "$@"`, which
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means selecting `file1` and `file2`, then pressing `p` will cause `bb` to run
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the shell command `$PAGER file1 file2`.
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## Customizing bb
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`bb` comes with a bunch of pre-defined bindings for basic actions in
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[config.def.h](config.def.h) (within `bb`, press `?` to see descriptions of the
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bindings), but it's very easy to add new bindings for whatever custom scripts
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you want to run, just add a new entry in `bindings` in config.h with the form
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`{{keys...}, "<shell command>", "<description>"}` (The description is shown when
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pressing `?` within `bb`.)
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### User Input in Scripts
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If you need user input in a binding, you can use the `ASK(var, prompt,
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initial)` macro, which internally uses the `read` shell function (`initial` is
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discarded). Optionally, `bb` can use `ask` or `dmenu` by passing `ASKER=ask` or
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`ASKER=dmenu` to `make` during the build process. This is used in a few key
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bindings by default, including `Ctrl-n` and `:`.
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### Fuzzy Finding
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To select from a list of options with a fuzzy finder in a binding, you can use
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the `PICK` macro. During the `make` process, you can use `PICKER=fzy`,
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`PICKER=fzf`, `PICKER=dmenu`, or `PICKER=ask` to choose which fuzzy finder
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program `bb` will use. This is used in the `/` and `Ctrl-f` key bindings by
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default.
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[bindings.bb](bindings.bb) (installed to `/etc/xdg/bb/bindings.bb`) (within
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`bb`, press `?` to see descriptions of the bindings), but it's very easy to add
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new bindings for whatever custom scripts you want to run, just `mkdir -p
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~/.config/bb && cp -n /etc/xdg/bb/bindings.bb ~/.config/bb/` and edit
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`~/.config/bb/bindings.bb` to have your new bindings. You can also create
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bindings at runtime by hitting `Ctrl-b` (in case you want to set up an easy way
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to repeat some custom workflow).
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### API
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`bb` also exposes an API that allows shell scripts to modify `bb`'s internal
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state. To do this, call `bb +<your command>` from within `bb`. For example, by
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default, `j` is bound to `bb +move:+1`, which has the effect of moving `bb`'s
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cursor down one item. More details about the API can be found in [the config
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file](config.def.h).
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cursor down one item. More details about the API can be found in [the API
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documentation](API.md).
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## FAQ
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### Using bb to Change Directory
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Applications cannot change the shell's working directory on their own, but you
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can define a shell function that uses the shell's builtin `cd` function on the
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output of `bb -d` (print directory on exit). For bash (sh, zsh, etc.), you can
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@ -98,6 +92,7 @@ In both versions, the directory will not change if `bb` exits with failure
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(e.g. by pressing `Ctrl-c`).
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### Launching bb with a Keyboard Shortcut
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Using a keyboard shortcut to launch `bb` from the shell is something that is
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handled by your shell. Here are some examples for binding `Ctrl-b` to launch
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`bb` and change directory to `bb`'s directory (using the `bcd` function defined
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@ -110,4 +105,5 @@ For fish, put this in your `~/.config/fish/functions/fish_user_key_bindings.fish
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bind \cB 'bcd; commandline -f repaint'
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## License
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`bb` is released under the MIT license. See the `LICENSE` file for full details.
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301
bb.h
Normal file
301
bb.h
Normal file
@ -0,0 +1,301 @@
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/*
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* Bitty Browser (bb)
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* Copyright 2019 Bruce Hill
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* Released under the MIT license
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*
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* This file contains definitions and customization for `bb`.
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*/
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#include <dirent.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/dir.h>
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#include <sys/errno.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <termios.h>
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#include <time.h>
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#include <unistd.h>
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#include "bterm.h"
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// Macros:
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#define BB_VERSION "0.16.0"
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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#define MAX_COLS 12
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#define MAX_SORT (2*MAX_COLS)
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#define HASH_SIZE 1024
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#define HASH_MASK (HASH_SIZE - 1)
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#define MAX(a,b) ((a) < (b) ? (b) : (a))
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#define MIN(a,b) ((a) > (b) ? (b) : (a))
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#define IS_SELECTED(p) (((p)->selected.atme) != NULL)
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#define IS_VIEWED(p) ((p)->index >= 0)
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#define LOWERCASE(c) ('A' <= (c) && (c) <= 'Z' ? ((c) + 'a' - 'A') : (c))
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#define E_ISDIR(e) (S_ISDIR(S_ISLNK((e)->info.st_mode) ? (e)->linkedmode : (e)->info.st_mode))
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#define ONSCREEN (termheight - 3)
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#ifdef __APPLE__
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#define mtime(s) (s).st_mtimespec
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#define atime(s) (s).st_atimespec
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#define ctime(s) (s).st_ctimespec
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#else
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#define mtime(s) (s).st_mtim
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#define atime(s) (s).st_atim
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#define ctime(s) (s).st_ctim
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#endif
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#define err(...) do { \
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cleanup(); \
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fprintf(stderr, __VA_ARGS__); \
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if (errno) fprintf(stderr, "\n%s", strerror(errno)); \
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fprintf(stderr, "\n"); \
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exit(EXIT_FAILURE); \
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} while (0)
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// Types:
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typedef struct {
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int key;
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char *script;
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char *description;
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} binding_t;
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typedef struct {
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int width;
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const char *name;
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} column_t;
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typedef enum {
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COL_NONE = 0,
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COL_NAME = 'n',
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COL_SIZE = 's',
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COL_PERM = 'p',
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COL_MTIME = 'm',
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COL_CTIME = 'c',
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COL_ATIME = 'a',
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COL_RANDOM = 'r',
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COL_SELECTED = '*',
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} column_e;
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/* entry_t uses intrusive linked lists. This means entries can only belong to
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* one list at a time, in this case the list of selected entries. 'atme' is an
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* indirect pointer to either the 'next' field of the previous list member, or
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* the variable that points to the first list member. In other words,
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* item->next->atme == &item->next and firstitem->atme == &firstitem.
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*/
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typedef struct {
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struct entry_s *next, **atme;
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} llnode_t;
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typedef struct entry_s {
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llnode_t selected, hash;
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char *name, *linkname;
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struct stat info;
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mode_t linkedmode;
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int no_esc : 1;
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int link_no_esc : 1;
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int shufflepos;
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int index;
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char fullname[1];
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// ------- fullname must be last! --------------
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// When entries are allocated, extra space on the end is reserved to fill
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// in fullname.
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} entry_t;
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typedef struct bb_s {
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entry_t *hash[HASH_SIZE];
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entry_t **files;
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entry_t *firstselected;
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char path[PATH_MAX];
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char prev_path[PATH_MAX];
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int nfiles;
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int scroll, cursor;
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char sort[MAX_SORT+1];
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char columns[MAX_COLS+1];
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unsigned int dirty : 1;
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unsigned int show_dotdot : 1;
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unsigned int show_dot : 1;
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unsigned int show_dotfiles : 1;
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unsigned int interleave_dirs : 1;
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unsigned int should_quit : 1;
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} bb_t;
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typedef enum { BB_OK = 0, BB_INVALID, BB_QUIT } bb_result_t;
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// Configurable options:
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#define SCROLLOFF MIN(5, (termheight-4)/2)
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#define CMDFILE_FORMAT "/tmp/bb.XXXXXX"
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#define SORT_INDICATOR "↓"
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#define RSORT_INDICATOR "↑"
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#define SELECTED_INDICATOR " \033[31;7m \033[0m"
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#define NOT_SELECTED_INDICATOR " "
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// Colors (using ANSI escape sequences):
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#define TITLE_COLOR "\033[37;1m"
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#define NORMAL_COLOR "\033[37m"
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#define CURSOR_COLOR "\033[43;30;1m"
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#define LINK_COLOR "\033[35m"
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#define DIR_COLOR "\033[34m"
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#define EXECUTABLE_COLOR "\033[31m"
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#define MAX_BINDINGS 1024
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binding_t bindings[MAX_BINDINGS];
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// Column widths and titles:
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const column_t columns[] = {
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['*'] = {2, "*"},
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['a'] = {21, " Accessed"},
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['c'] = {21, " Created"},
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['m'] = {21, " Modified"},
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['n'] = {40, "Name"},
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['p'] = {5, "Permissions"},
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['r'] = {2, "Random"},
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['s'] = {9, " Size"},
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};
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// Functions
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void bb_browse(bb_t *bb, const char *path);
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static int cd_to(bb_t *bb, const char *path);
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static void cleanup(void);
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static void cleanup_and_exit(int sig);
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static const char* color_of(mode_t mode);
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#ifdef __APPLE__
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static int compare_files(void *v, const void *v1, const void *v2);
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#else
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static int compare_files(const void *v1, const void *v2, void *v);
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#endif
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static int fputs_escaped(FILE *f, const char *str, const char *color);
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static void init_term(void);
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static int is_simple_bbcmd(const char *s);
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static entry_t* load_entry(bb_t *bb, const char *path, int clear_dots);
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static void* memcheck(void *p);
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static void normalize_path(const char *root, const char *path, char *pbuf, int clear_dots);
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static void populate_files(bb_t *bb, int samedir);
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static void print_bindings(int fd);
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static bb_result_t process_cmd(bb_t *bb, const char *cmd);
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static void render(bb_t *bb);
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static void restore_term(const struct termios *term);
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static int run_script(bb_t *bb, const char *cmd);
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static void set_cursor(bb_t *bb, int i);
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static void set_selected(bb_t *bb, entry_t *e, int selected);
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static void set_scroll(bb_t *bb, int i);
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static void set_sort(bb_t *bb, const char *sort);
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static void sort_files(bb_t *bb);
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static char *trim(char *s);
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static int try_free_entry(entry_t *e);
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static void update_term_size(int sig);
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// Constants
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static const char *T_ENTER_BBMODE = T_OFF(T_SHOW_CURSOR ";" T_WRAP) T_ON(T_ALT_SCREEN ";" T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR);
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static const char *T_LEAVE_BBMODE = T_OFF(T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR ";" T_ALT_SCREEN) T_ON(T_SHOW_CURSOR ";" T_WRAP);
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static const char *T_LEAVE_BBMODE_PARTIAL = T_OFF(T_MOUSE_XY ";" T_MOUSE_CELL ";" T_MOUSE_SGR) T_ON(T_WRAP);
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static const struct termios default_termios = {
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.c_iflag = ICRNL,
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.c_oflag = OPOST | ONLCR | NL0 | CR0 | TAB0 | BS0 | VT0 | FF0,
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.c_lflag = ISIG | ICANON | IEXTEN | ECHO | ECHOE | ECHOK | ECHOCTL | ECHOKE,
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.c_cflag = CS8 | CREAD,
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.c_cc[VINTR] = '',
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.c_cc[VQUIT] = ' ',
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.c_cc[VERASE] = 127,
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.c_cc[VKILL] = '',
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.c_cc[VEOF] = '',
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.c_cc[VSTART] = '',
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.c_cc[VSTOP] = '',
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.c_cc[VSUSP] = '',
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.c_cc[VREPRINT] = '',
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.c_cc[VWERASE] = '',
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.c_cc[VLNEXT] = '',
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.c_cc[VDISCARD] = '',
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.c_cc[VMIN] = 1,
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.c_cc[VTIME] = 0,
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};
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// Shell functions
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static const char *bbcmdfn = "bb() {\n"
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" if test $# -eq 0; then cat >> $BBCMD; return; fi\n"
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" for arg; do\n"
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" shift;\n"
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" if echo \"$arg\" | grep \"^+[^:]*:$\" >/dev/null 2>/dev/null; then\n"
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" if test $# -gt 0; then printf \"%s\\0\" \"$arg\" \"$@\" >> $BBCMD\n"
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" else sed \"s/\\([^\\x00]\\+\\)/$arg\\1/g\" >> $BBCMD; fi\n"
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" return\n"
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" fi\n"
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" printf \"%s\\0\" \"$arg\" >> $BBCMD\n"
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" done\n"
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"}\n"
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"ask() {\n"
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#ifdef ASK
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ASK ";\n"
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#else
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" printf \"\033[1m%s\033[0m\" \"$2\" >/dev/tty;\n"
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" read $1 </dev/tty >/dev/tty\n"
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#endif
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"}\n"
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"ask1() {\n"
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#ifdef ASK1
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ASK1 ";\n"
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#else
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" printf \"\033[?25l\" >/dev/tty;\n"
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" printf \"\033[1m%s\033[0m\" \"$2\" >/dev/tty;\n"
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" stty -icanon -echo >/dev/tty;\n"
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" eval \"$1=\\$(dd bs=1 count=1 2>/dev/null </dev/tty)\";\n"
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" stty icanon echo >/dev/tty;\n"
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" printf \"\033[?25h\" >/dev/tty;\n"
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#endif
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"}\n"
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"confirm() {\n"
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#ifdef CONFIRM
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CONFIRM ";\n"
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#else
|
||||
" ask1 REPLY \"\033[1mIs that okay? [y/N] \" && [ \"$REPLY\" = 'y' ];\n"
|
||||
#endif
|
||||
"}\n"
|
||||
"pause() {\n"
|
||||
#ifdef PAUSE
|
||||
PAUSE ";\n"
|
||||
#else
|
||||
" ask1 REPLY \"\033[2mPress any key to continue...\033[0m\";"
|
||||
#endif
|
||||
"}\n"
|
||||
"pick() {\n"
|
||||
#ifdef PICK
|
||||
PICK ";\n"
|
||||
#else
|
||||
" ask query \"$1\" && awk '{print length, $1}' | sort -n | cut -d' ' -f2- |\n"
|
||||
" grep -i -m1 \"$(echo \"$query\" | sed 's;.;[^/&]*[&];g')\";\n"
|
||||
#endif
|
||||
"}\n"
|
||||
"spin() {\n"
|
||||
#ifdef SPIN
|
||||
SPIN ";\n"
|
||||
#else
|
||||
" eval \"$@\" &\n"
|
||||
" pid=$!;\n"
|
||||
" spinner='-\\|/';\n"
|
||||
" sleep 0.01;\n"
|
||||
" while kill -0 $pid 2>/dev/null; do\n"
|
||||
" printf '%c\\033[D' \"$spinner\" >/dev/tty;\n"
|
||||
" spinner=\"$(echo $spinner | sed 's/\\(.\\)\\(.*\\)/\\2\\1/')\";\n"
|
||||
" sleep 0.1;\n"
|
||||
" done;\n"
|
||||
" wait $pid;\n"
|
||||
#endif
|
||||
"}\n"
|
||||
#ifdef SH
|
||||
"alias sh=" SH";\n"
|
||||
#else
|
||||
#define SH "sh"
|
||||
#endif
|
||||
;
|
||||
|
||||
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1
|
||||
74
config.h
74
config.h
@ -1,74 +0,0 @@
|
||||
/*
|
||||
BB Configuration, Startup Commands, and Key Bindings
|
||||
|
||||
User customization goes in config.h, which is created by running `make`
|
||||
(config.def.h is for keeping the defaults around, just in case)
|
||||
|
||||
This file contains:
|
||||
- Global options, like which colors are used
|
||||
- Column formatting (width and title)
|
||||
|
||||
*/
|
||||
#include "bterm.h"
|
||||
|
||||
// Types:
|
||||
typedef struct {
|
||||
int key;
|
||||
char *script;
|
||||
char *description;
|
||||
} binding_t;
|
||||
|
||||
typedef struct {
|
||||
int width;
|
||||
const char *name;
|
||||
} column_t;
|
||||
|
||||
// Configurable options:
|
||||
#define SCROLLOFF MIN(5, (termheight-4)/2)
|
||||
#define CMDFILE_FORMAT "/tmp/bb.XXXXXX"
|
||||
#define SORT_INDICATOR "↓"
|
||||
#define RSORT_INDICATOR "↑"
|
||||
#define SELECTED_INDICATOR " \033[31;7m \033[0m"
|
||||
#define NOT_SELECTED_INDICATOR " "
|
||||
// Colors (using ANSI escape sequences):
|
||||
#define TITLE_COLOR "\033[37;1m"
|
||||
#define NORMAL_COLOR "\033[37m"
|
||||
#define CURSOR_COLOR "\033[43;30;1m"
|
||||
#define LINK_COLOR "\033[35m"
|
||||
#define DIR_COLOR "\033[34m"
|
||||
#define EXECUTABLE_COLOR "\033[31m"
|
||||
|
||||
#ifndef SH
|
||||
#define SH "sh"
|
||||
#endif
|
||||
|
||||
// These commands will run at startup (before command-line arguments)
|
||||
extern const column_t columns[128];
|
||||
extern binding_t bindings[1024];
|
||||
|
||||
// Column widths and titles:
|
||||
const column_t columns[128] = {
|
||||
['*'] = {2, "*"},
|
||||
['a'] = {21, " Accessed"},
|
||||
['c'] = {21, " Created"},
|
||||
['m'] = {21, " Modified"},
|
||||
['n'] = {40, "Name"},
|
||||
['p'] = {5, "Permissions"},
|
||||
['r'] = {2, "Random"},
|
||||
['s'] = {9, " Size"},
|
||||
};
|
||||
|
||||
/******************************************************************************
|
||||
* These are all the key bindings for bb.
|
||||
* The format is: {{keys,...}, "<script>", "<description>"}
|
||||
*
|
||||
* Please note that these are sh scripts, not bash scripts, so bash-isms
|
||||
* won't work unless you make your script use `bash -c "<your bash script>"`
|
||||
*
|
||||
* If your editor is vim (and not neovim), you can replace `$EDITOR` below with
|
||||
* `vim -c 'set t_ti= t_te=' "$@"` to prevent momentarily seeing the shell
|
||||
* after editing.
|
||||
*****************************************************************************/
|
||||
binding_t bindings[1024];
|
||||
|
||||
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1
|
||||
Loading…
Reference in New Issue
Block a user