1 files changed, 121 insertions, 0 deletions
diff --git a/src/exec.h b/src/exec.h
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+++ b/src/exec.h
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+/****************************************************************************
+ * bfs                                                                      *
+ * Copyright (C) 2017-2020 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.           *
+ ****************************************************************************/
+
+/**
+ * Implementation of -exec/-execdir/-ok/-okdir.
+ */
+
+#ifndef BFS_EXEC_H
+#define BFS_EXEC_H
+
+#include <stddef.h>
+
+struct BFTW;
+struct bfs_ctx;
+
+/**
+ * Flags for the -exec actions.
+ */
+enum bfs_exec_flags {
+	/** Prompt the user before executing (-ok, -okdir). */
+	BFS_EXEC_CONFIRM = 1 << 0,
+	/** Run the command in the file's parent directory (-execdir, -okdir). */
+	BFS_EXEC_CHDIR   = 1 << 1,
+	/** Pass multiple files at once to the command (-exec ... {} +). */
+	BFS_EXEC_MULTI   = 1 << 2,
+};
+
+/**
+ * Buffer for a command line to be executed.
+ */
+struct bfs_exec {
+	/** Flags for this exec buffer. */
+	enum bfs_exec_flags flags;
+
+	/** The bfs context. */
+	const struct bfs_ctx *ctx;
+	/** Command line template. */
+	char **tmpl_argv;
+	/** Command line template size. */
+	size_t tmpl_argc;
+
+	/** The built command line. */
+	char **argv;
+	/** Number of command line arguments. */
+	size_t argc;
+	/** Capacity of argv. */
+	size_t argv_cap;
+
+	/** Current size of all arguments. */
+	size_t arg_size;
+	/** Maximum arg_size before E2BIG. */
+	size_t arg_max;
+	/** Lower bound for arg_max. */
+	size_t arg_min;
+
+	/** A file descriptor for the working directory, for BFS_EXEC_CHDIR. */
+	int wd_fd;
+	/** The path to the working directory, for BFS_EXEC_CHDIR. */
+	char *wd_path;
+	/** Length of the working directory path. */
+	size_t wd_len;
+
+	/** The ultimate return value for bfs_exec_finish(). */
+	int ret;
+};
+
+/**
+ * Parse an exec action.
+ *
+ * @param argv
+ *         The (bfs) command line argument to parse.
+ * @param flags
+ *         Any flags for this exec action.
+ * @param ctx
+ *         The bfs context.
+ * @return
+ *         The parsed exec action, or NULL on failure.
+ */
+struct bfs_exec *bfs_exec_parse(const struct bfs_ctx *ctx, char **argv, enum bfs_exec_flags flags);
+
+/**
+ * Execute the command for a file.
+ *
+ * @param execbuf
+ *         The parsed exec action.
+ * @param ftwbuf
+ *         The bftw() data for the current file.
+ * @return 0 if the command succeeded, -1 if it failed.  If the command could
+ *         be executed, -1 is returned, and errno will be non-zero.  For
+ *         BFS_EXEC_MULTI, errors will not be reported until bfs_exec_finish().
+ */
+int bfs_exec(struct bfs_exec *execbuf, const struct BFTW *ftwbuf);
+
+/**
+ * Finish executing any commands.
+ *
+ * @param execbuf
+ *         The parsed exec action.
+ * @return 0 on success, -1 if any errors were encountered.
+ */
+int bfs_exec_finish(struct bfs_exec *execbuf);
+
+/**
+ * Free a parsed exec action.
+ */
+void bfs_exec_free(struct bfs_exec *execbuf);
+
+#endif // BFS_EXEC_H