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Userland: Allow executing binaries from PATH with env.

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This is useful for shebangs:

    #!/bin/env Shell
    echo "Hello, World!"
This commit is contained in:
asynts 2020-09-16 18:56:00 +02:00 committed by Andreas Kling
parent f1b1a78f26
commit 2229b13c97
Notes: sideshowbarker 2024-07-19 02:22:46 +09:00 
Author: https://github.com/asynts
Commit: https://github.com/SerenityOS/serenity/commit/2229b13c974
Pull-request: https://github.com/SerenityOS/serenity/pull/3511
Reviewed-by: https://github.com/nico
1 changed files with 35 additions and 6 deletions
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41
Userland/env.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2020, the SerenityOS developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -24,17 +24,46 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibCore/DirIterator.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int, char**)
int main(int argc, char** argv)
{
if (pledge("stdio", nullptr) < 0) {
if (pledge("stdio rpath exec", nullptr) < 0) {
perror("pledge");
return 1;
}
for (size_t i = 0; environ[i]; ++i)
printf("%s\n", environ[i]);
return 0;
const char* filename = nullptr;
for (int idx = 1; idx < argc; ++idx) {
if (StringView { argv[idx] }.contains('=')) {
putenv(argv[idx]);
} else {
filename = argv[idx];
argv += idx;
break;
}
}
if (filename == nullptr) {
for (auto entry = environ; *entry != nullptr; ++entry)
printf("%s\n", *entry);
return 0;
}
String filepath = Core::find_executable_in_path(filename);
if (filepath.is_null()) {
warn() << "no " << filename << " in path";
return 1;
}
execv(filepath.characters(), argv);
perror("execv");
return 1;
}