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[support, docs] A minimal implementation of the "realpath" CLI.
This frees us from needing a system prerequisite, and enables platforms that don't even provide such a binary.
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// Copyright (C) 2018 Google Inc. | ||
// | ||
// This program is free software; you can redistribute it and/or modify | ||
// it under the terms of the GNU General Public License as published by | ||
// the Free Software Foundation; either version 2 of the License, or | ||
// (at your option) any later version. | ||
// | ||
// This program is distributed in the hope that it will be useful, | ||
// but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
// GNU General Public License for more details. | ||
// | ||
// You should have received a copy of the GNU General Public License along | ||
// with this program; if not, write to the Free Software Foundation, Inc., | ||
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
// | ||
//////////////////////////////////////////////////////////////////////////////// | ||
// | ||
// A minimal driver for Posix realpath(). Not every Posix system supplies such | ||
// a driver, and even on those that do it might require a separate installation | ||
// step. This implements the equivalent of "realpath -e" on Linux. | ||
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#include <errno.h> | ||
#include <stdio.h> | ||
#include <stdlib.h> | ||
#include <string.h> | ||
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int main(int argc, char* argv[]) { | ||
int num_errors = 0; | ||
errno = 0; | ||
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for (int i = 1; i < argc; ++i) { | ||
char* p = realpath(argv[i], NULL); | ||
if (p == NULL) { | ||
fprintf(stderr, "Error resolving path '%s', error was: '%s'\n", | ||
argv[i], strerror(errno)); | ||
errno = 0; | ||
++num_errors; | ||
} else { | ||
fprintf(stdout, "%s\n", p); | ||
free(p); | ||
} | ||
} | ||
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return num_errors == 0 ? EXIT_SUCCESS : EXIT_FAILURE; | ||
} |
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