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/****************************************************************************
* bfs *
* Copyright (C) 2015-2020 Tavian Barnes <tavianator@tavianator.com> *
* *
* Permission to use, copy, modify, and/or distribute this software for any *
* purpose with or without fee is hereby granted. *
* *
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES *
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF *
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR *
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES *
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN *
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF *
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. *
****************************************************************************/
#include "ctx.h"
#include "darray.h"
#include "diag.h"
#include "expr.h"
#include "mtab.h"
#include "pwcache.h"
#include "trie.h"
#include <assert.h>
#include <errno.h>
#include <stdlib.h>
struct bfs_ctx *bfs_ctx_new(void) {
struct bfs_ctx *ctx = malloc(sizeof(*ctx));
if (!ctx) {
return NULL;
}
ctx->argv = NULL;
ctx->paths = NULL;
ctx->expr = NULL;
ctx->exclude = NULL;
ctx->mindepth = 0;
ctx->maxdepth = INT_MAX;
ctx->flags = BFTW_RECOVER;
ctx->strategy = BFTW_BFS;
ctx->optlevel = 3;
ctx->debug = 0;
ctx->ignore_races = false;
ctx->unique = false;
ctx->warn = false;
ctx->xargs_safe = false;
ctx->colors = NULL;
ctx->cout = NULL;
ctx->cerr = NULL;
ctx->users = NULL;
ctx->users_error = 0;
ctx->groups = NULL;
ctx->groups_error = 0;
ctx->mtab = NULL;
ctx->mtab_error = 0;
trie_init(&ctx->files);
ctx->nfiles = 0;
return ctx;
}
const struct bfs_users *bfs_ctx_users(const struct bfs_ctx *ctx) {
struct bfs_ctx *mut = (struct bfs_ctx *)ctx;
if (mut->users_error) {
errno = mut->users_error;
} else if (!mut->users) {
mut->users = bfs_parse_users();
if (!mut->users) {
mut->users_error = errno;
}
}
return mut->users;
}
const struct bfs_groups *bfs_ctx_groups(const struct bfs_ctx *ctx) {
struct bfs_ctx *mut = (struct bfs_ctx *)ctx;
if (mut->groups_error) {
errno = mut->groups_error;
} else if (!mut->groups) {
mut->groups = bfs_parse_groups();
if (!mut->groups) {
mut->groups_error = errno;
}
}
return mut->groups;
}
const struct bfs_mtab *bfs_ctx_mtab(const struct bfs_ctx *ctx) {
struct bfs_ctx *mut = (struct bfs_ctx *)ctx;
if (mut->mtab_error) {
errno = mut->mtab_error;
} else if (!mut->mtab) {
mut->mtab = bfs_parse_mtab();
if (!mut->mtab) {
mut->mtab_error = errno;
}
}
return mut->mtab;
}
/**
* An open file tracked by the bfs context.
*/
struct bfs_ctx_file {
/** The file itself. */
CFILE *cfile;
/** The path to the file (for diagnostics). */
const char *path;
};
CFILE *bfs_ctx_open(struct bfs_ctx *ctx, const char *path, bool use_color) {
int error = 0;
CFILE *cfile = cfopen(path, use_color ? ctx->colors : NULL);
if (!cfile) {
error = errno;
goto out;
}
struct bfs_stat sb;
if (bfs_stat(fileno(cfile->file), NULL, 0, &sb) != 0) {
error = errno;
goto out_close;
}
bfs_file_id id;
bfs_stat_id(&sb, &id);
struct trie_leaf *leaf = trie_insert_mem(&ctx->files, id, sizeof(id));
if (!leaf) {
error = errno;
goto out_close;
}
if (leaf->value) {
struct bfs_ctx_file *ctx_file = leaf->value;
cfclose(cfile);
cfile = ctx_file->cfile;
goto out;
}
struct bfs_ctx_file *ctx_file = malloc(sizeof(*ctx_file));
if (!ctx_file) {
error = errno;
trie_remove(&ctx->files, leaf);
goto out_close;
}
ctx_file->cfile = cfile;
ctx_file->path = path;
leaf->value = ctx_file;
++ctx->nfiles;
goto out;
out_close:
cfclose(cfile);
cfile = NULL;
out:
errno = error;
return cfile;
}
int bfs_ctx_free(struct bfs_ctx *ctx) {
int ret = 0;
if (ctx) {
CFILE *cout = ctx->cout;
CFILE *cerr = ctx->cerr;
free_expr(ctx->expr);
free_expr(ctx->exclude);
bfs_free_mtab(ctx->mtab);
bfs_free_groups(ctx->groups);
bfs_free_users(ctx->users);
struct trie_leaf *leaf;
while ((leaf = trie_first_leaf(&ctx->files))) {
struct bfs_ctx_file *ctx_file = leaf->value;
if (cfclose(ctx_file->cfile) != 0) {
if (cerr) {
bfs_error(ctx, "'%s': %m.\n", ctx_file->path);
}
ret = -1;
}
free(ctx_file);
trie_remove(&ctx->files, leaf);
}
trie_destroy(&ctx->files);
if (cout && fflush(cout->file) != 0) {
if (cerr) {
bfs_error(ctx, "standard output: %m.\n");
}
ret = -1;
}
cfclose(cout);
cfclose(cerr);
free_colors(ctx->colors);
darray_free(ctx->paths);
free(ctx->argv);
free(ctx);
}
return ret;
}
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