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// Copyright © Tavian Barnes <tavianator@tavianator.com>
// SPDX-License-Identifier: 0BSD
/**
* bfs execution context.
*/
#ifndef BFS_CTX_H
#define BFS_CTX_H
#include "prelude.h"
#include "alloc.h"
#include "bftw.h"
#include "diag.h"
#include "expr.h"
#include "trie.h"
#include <stddef.h>
#include <sys/resource.h>
#include <sys/types.h>
#include <time.h>
struct CFILE;
/**
* The execution context for bfs.
*/
struct bfs_ctx {
/** The number of command line arguments. */
size_t argc;
/** The unparsed command line arguments. */
char **argv;
/** The root paths. */
const char **paths;
/** The number of root paths. */
size_t npaths;
/** The main command line expression. */
struct bfs_expr *expr;
/** An expression for files to filter out. */
struct bfs_expr *exclude;
/** A list of allocated expressions. */
struct bfs_exprs expr_list;
/** bfs_expr arena. */
struct arena expr_arena;
/** -mindepth option. */
int mindepth;
/** -maxdepth option. */
int maxdepth;
/** bftw() flags. */
enum bftw_flags flags;
/** bftw() search strategy. */
enum bftw_strategy strategy;
/** Threads (-j). */
int threads;
/** Optimization level (-O). */
int optlevel;
/** Debugging flags (-D). */
enum debug_flags debug;
/** Whether to ignore deletions that race with bfs (-ignore_readdir_race). */
bool ignore_races;
/** Whether to follow POSIXisms more closely ($POSIXLY_CORRECT). */
bool posixly_correct;
/** Whether to show a status bar (-status). */
bool status;
/** Whether to only return unique files (-unique). */
bool unique;
/** Whether to print warnings (-warn/-nowarn). */
bool warn;
/** Whether to only handle paths with xargs-safe characters (-X). */
bool xargs_safe;
/** Color data. */
struct colors *colors;
/** The error that occurred parsing the color table, if any. */
int colors_error;
/** Colored stdout. */
struct CFILE *cout;
/** Colored stderr. */
struct CFILE *cerr;
/** User cache. */
struct bfs_users *users;
/** Group table. */
struct bfs_groups *groups;
/** The error that occurred parsing the group table, if any. */
int groups_error;
/** Table of mounted file systems. */
struct bfs_mtab *mtab;
/** The error that occurred parsing the mount table, if any. */
int mtab_error;
/** All the files owned by the context. */
struct trie files;
/** The number of files owned by the context. */
int nfiles;
/** The current file creation mask. */
mode_t umask;
/** The initial RLIMIT_NOFILE limits. */
struct rlimit orig_nofile;
/** The current RLIMIT_NOFILE limits. */
struct rlimit cur_nofile;
/** Whether the fd limit should be raised. */
bool raise_nofile;
/** The current time. */
struct timespec now;
};
/**
* @return
* A new bfs context, or NULL on failure.
*/
struct bfs_ctx *bfs_ctx_new(void);
/**
* Get the mount table.
*
* @param ctx
* The bfs context.
* @return
* The cached mount table, or NULL on failure.
*/
const struct bfs_mtab *bfs_ctx_mtab(const struct bfs_ctx *ctx);
/**
* Deduplicate an opened file.
*
* @param ctx
* The bfs context.
* @param cfile
* The opened file.
* @param path
* The path to the opened file (or NULL for standard streams).
* @return
* If the same file was opened previously, that file is returned. If cfile is a new file,
* cfile itself is returned. If an error occurs, NULL is returned.
*/
struct CFILE *bfs_ctx_dedup(struct bfs_ctx *ctx, struct CFILE *cfile, const char *path);
/**
* Flush any caches for consistency with external processes.
*
* @param ctx
* The bfs context.
*/
void bfs_ctx_flush(const struct bfs_ctx *ctx);
/**
* Dump the parsed command line.
*
* @param ctx
* The bfs context.
* @param flag
* The -D flag that triggered the dump.
*/
void bfs_ctx_dump(const struct bfs_ctx *ctx, enum debug_flags flag);
/**
* Free a bfs context.
*
* @param ctx
* The context to free.
* @return
* 0 on success, -1 if any errors occurred.
*/
int bfs_ctx_free(struct bfs_ctx *ctx);
#endif // BFS_CTX_H
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