test-chase-symlinks: manual test to call chase_symlinks()

v2:
- print --help to stdout, use size_t

2 files changed, 110 insertions, 0 deletions

diff --git a/src/test/meson.build b/src/test/meson.build
index ddc04dda65..db9510ba7e 100644
--- a/src/test/meson.build
+++ b/src/test/meson.build
@@ -627,6 +627,11 @@ tests += [
          [],
          []],
 
+        [['src/test/test-chase-symlinks.c'],
+         [],
+         [],
+         '', 'manual'],
+
         [['src/test/test-path.c',
           'src/test/test-helper.c'],
          [libcore,
diff --git a/src/test/test-chase-symlinks.c b/src/test/test-chase-symlinks.c
new file mode 100644
index 0000000000..3fac6b6bc5
--- /dev/null
+++ b/src/test/test-chase-symlinks.c
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: LGPL-2.1+ */
+#include <getopt.h>
+
+#include "log.h"
+#include "fs-util.h"
+#include "main-func.h"
+
+static char *arg_root = NULL;
+static int arg_flags = 0;
+
+static int parse_argv(int argc, char *argv[]) {
+        enum {
+                ARG_ROOT = 0x1000,
+        };
+
+        static const struct option options[] = {
+                { "help",                no_argument,       NULL, 'h'                     },
+                { "root",                required_argument, NULL, ARG_ROOT                },
+
+                { "prefix-root",         no_argument,       NULL, CHASE_PREFIX_ROOT       },
+                { "nonexistent",         no_argument,       NULL, CHASE_NONEXISTENT       },
+                { "no_autofs",           no_argument,       NULL, CHASE_NO_AUTOFS         },
+                { "safe",                no_argument,       NULL, CHASE_SAFE              },
+                { "open",                no_argument,       NULL, CHASE_OPEN              },
+                { "trail-slash",         no_argument,       NULL, CHASE_TRAIL_SLASH       },
+                { "step",                no_argument,       NULL, CHASE_STEP              },
+                { "nofollow",            no_argument,       NULL, CHASE_NOFOLLOW          },
+                { "warn",                no_argument,       NULL, CHASE_WARN              },
+                {}
+        };
+
+        int c;
+
+        assert(argc >= 0);
+        assert(argv);
+
+        while ((c = getopt_long(argc, argv, "", options, NULL)) >= 0)
+                switch (c) {
+
+                case 'h':
+                        printf("Syntax:\n"
+                               "  %s [OPTION...] path...\n"
+                               "Options:\n"
+                               , argv[0]);
+                        for (size_t i = 0; i < ELEMENTSOF(options) - 1; i++)
+                                printf("  --%s\n", options[i].name);
+                        return 0;
+
+                case ARG_ROOT:
+                        arg_root = optarg;
+                        break;
+
+                case CHASE_PREFIX_ROOT:
+                case CHASE_NONEXISTENT:
+                case CHASE_NO_AUTOFS:
+                case CHASE_SAFE:
+                case CHASE_OPEN:
+                case CHASE_TRAIL_SLASH:
+                case CHASE_STEP:
+                case CHASE_NOFOLLOW:
+                case CHASE_WARN:
+                        arg_flags |= c;
+                        break;
+
+                case '?':
+                        return -EINVAL;
+
+                default:
+                        assert_not_reached("Unhandled option");
+                }
+
+        if (optind == argc)
+                return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "At least one argument is required.");
+
+        return 1;
+}
+
+static int run(int argc, char **argv) {
+        int r;
+
+        log_show_color(true);
+        log_parse_environment();
+        log_open();
+
+        r = parse_argv(argc, argv);
+        if (r <= 0)
+                return r;
+
+        for (int i = optind; i < argc; i++) {
+                _cleanup_free_ char *p = NULL;
+
+                printf("%s ", argv[i]);
+                fflush(stdout);
+
+                r = chase_symlinks(argv[i], arg_root, arg_flags, &p);
+                if (r < 0)
+                        log_error_errno(r, "failed: %m");
+                else
+                        log_info("→ %s", p);
+        }
+
+        return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);