L4Re/departure

Annotated fsaccess/ops.c

602:11c3032fffcc
9 months ago Paul Boddie Permit exit code propagation for potential handling.
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/*
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 * Operation invocation.
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 *
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 * Copyright (C) 2019, 2022 Paul Boddie <paul@boddie.org.uk>
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 *
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 * This program is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU General Public License as
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 * published by the Free Software Foundation; either version 2 of
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 * the License, or (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor,
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 * Boston, MA  02110-1301, USA
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 */
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#include <stdio.h>
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#include <string.h>
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#include "ops.h"
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/* Operations exposed by the program. */
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extern struct operation operations[];
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/* Produce a general result condition from the invocation of an operation. */
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int handle_op_result(const char *operation, enum op_results op_result)
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{
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    if (op_result == OP_UNKNOWN)
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    {
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        fprintf(stderr, "Operation not recognised: %s\n", operation);
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        return 1;
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    }
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    else if (op_result == OP_FAILED)
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    {
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        fprintf(stderr, "Operation failed: %s\n", operation);
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        return 1;
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    }
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    else
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        return 0;
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}
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/* Invocation of operations. */
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enum op_results run_operation(const char *operation, int argc, char *argv[], int *exitcode)
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{
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    struct operation *op;
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    for (op = &operations[0]; op->name != NULL; op++)
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    {
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        if (!strcmp(operation, op->name))
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        {
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            *exitcode = op->fn(argc, argv);
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            if (*exitcode)
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                return OP_FAILED;
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            break;
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        }
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    }
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    if (op->name == NULL)
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        return OP_UNKNOWN;
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    return OP_SUCCESS;
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}
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/* vim: tabstop=4 expandtab shiftwidth=4
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*/