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1f130bcc9c
Simplify the wrealpath interface and avoid manual invocations of free() by changing wrealpath to return a maybe_t<wcstring>.
50 lines
1.8 KiB
C++
50 lines
1.8 KiB
C++
// Implementation of the realpath builtin.
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#include "config.h" // IWYU pragma: keep
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#include <stdio.h>
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#include <stdlib.h>
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#include <wchar.h>
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#include "builtin.h"
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#include "builtin_realpath.h"
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#include "common.h"
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#include "fallback.h" // IWYU pragma: keep
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#include "io.h"
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#include "wutil.h" // IWYU pragma: keep
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/// An implementation of the external realpath command that doesn't support any options. It's meant
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/// to be used only by scripts which need to be portable. In general scripts shouldn't invoke this
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/// directly. They should just use `realpath` which will fallback to this builtin if an external
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/// command cannot be found. This behaves like the external `realpath --canonicalize-existing`;
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/// that is, it requires all path components, including the final, to exist.
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int builtin_realpath(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
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const wchar_t *cmd = argv[0];
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int argc = builtin_count_args(argv);
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help_only_cmd_opts_t opts;
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int optind;
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int retval = parse_help_only_cmd_opts(opts, &optind, argc, argv, parser, streams);
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if (retval != STATUS_CMD_OK) return retval;
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if (opts.print_help) {
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builtin_print_help(parser, streams, cmd, streams.out);
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return STATUS_CMD_OK;
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}
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if (optind + 1 != argc) {
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streams.err.append_format(BUILTIN_ERR_ARG_COUNT1, cmd, 1, argc - optind);
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builtin_print_help(parser, streams, cmd, streams.out);
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return STATUS_INVALID_ARGS;
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}
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if (auto real_path = wrealpath(argv[optind])) {
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streams.out.append(*real_path);
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} else {
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// We don't actually know why it failed. We should check errno.
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streams.err.append_format(_(L"%ls: Invalid path: %ls\n"), cmd, argv[optind]);
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return STATUS_CMD_ERROR;
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}
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streams.out.append(L"\n");
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return STATUS_CMD_OK;
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}
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