--- /dev/null
+/*
+ * Test execve() and exec*() functions.
+ *
+ * Copyright (C) 2013 Simon Ruderich
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+
+#define MAGIC "@RUN_"
+#define MAGIC_LENGTH (strlen(MAGIC))
+
+#define SETUP_RUN(number) \
+ sprintf(argv0, "%s" MAGIC "%03d", argv[0], (number))
+
+
+extern char **environ;
+
+
+static int find_magic_run_number(char *argv0, int *number) {
+ size_t length = strlen(argv0);
+ if (length <= MAGIC_LENGTH + 3) {
+ return 0;
+ }
+ /* Check if the string ends with "@RUN_YYY" where YYY should be a number
+ * (not checked). */
+ argv0 += length - MAGIC_LENGTH - 3;
+ if (strncmp(argv0, MAGIC, MAGIC_LENGTH)) {
+ return 0;
+ }
+ *number = atoi(argv0 + MAGIC_LENGTH);
+
+ /* Strip off "@RUN_YYY". */
+ argv0[0] = 0;
+ return 1;
+}
+
+static void dump(char *argv[]) {
+ size_t i;
+
+ i = 0;
+ while (*argv) {
+ printf("argv[%zu] = |%s|\n", i++, *argv++);
+ }
+ i = 0;
+ char **env = environ;
+ while (*env) {
+ /* Skip LD_PRELOAD which contains system dependent values. */
+ if (strncmp(*env, "LD_PRELOAD=", 11)) {
+ printf("environ[%zu] = |%s|\n", i, *env);
+ }
+ i++;
+ env++;
+ }
+ printf("\n");
+ /* When not writing to stdout (e.g. redirection while testing), glibc is
+ * buffering heavily. Flush to display the output before the exec*(). */
+ fflush(stdout);
+}
+
+
+int main(int argc, char **argv) {
+ char argv0[strlen(argv[0]) + MAGIC_LENGTH + 3 + 1];
+
+ char *old_ldpreload = getenv("LD_PRELOAD");
+ size_t ldpreload_length = strlen("LD_PRELOAD=") + 1;
+ if (old_ldpreload) {
+ ldpreload_length += strlen(old_ldpreload);
+ }
+ char ldpreload[ldpreload_length];
+ strcpy(ldpreload, "LD_PRELOAD=");
+ if (old_ldpreload) {
+ strcat(ldpreload, old_ldpreload);
+ }
+
+ int run;
+
+ /* First call. */
+ if (!find_magic_run_number(argv[0], &run)) {
+ SETUP_RUN(1);
+
+ char *args[] = { argv0, NULL };
+ char *envp[] = { ldpreload, NULL };
+
+ execve(argv[0], args, envp);
+ return EXIT_FAILURE;
+ }
+
+ /* Following calls, each testing an exec*() feature. */
+
+ dump(argv);
+ SETUP_RUN(run + 1);
+
+ int skip = run - 1;
+
+
+ /* Check that we update/insert the environment correctly. */
+
+ if (!skip--) {
+ printf("\nCHECKING COLORING.\n\n");
+ fflush(stdout);
+
+ dup2(2, 3);
+
+ char *args[] = { argv0, NULL };
+ char *envp[] = { ldpreload, NULL };
+
+ execve(argv[0], args, envp);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ dup2(2, 4);
+
+ execl(argv[0], argv0, NULL);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ dup2(2, 5);
+
+ execlp(argv[0], argv0, NULL);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ dup2(2, 6);
+
+ char *envp[] = { ldpreload, NULL };
+
+ execle(argv[0], argv0, NULL, envp);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ dup2(2, 7);
+
+ /* Test closing a few descriptors. */
+ close(5);
+ close(6);
+
+ char *args[] = { argv0, NULL };
+
+ execv(argv[0], args);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ dup2(2, 8);
+
+ /* And a few more. */
+ close(7);
+ close(4);
+
+ char *args[] = { argv0, NULL };
+
+ execvp(argv[0], args);
+ return EXIT_FAILURE;
+ } else {
+ close(3);
+ close(8);
+ }
+
+
+ /* And make sure our hooks don't change the behaviour. */
+
+ /* execve(2) */
+ if (!skip--) {
+ printf("\nCHECKING TRANSPARENCY.\n\n");
+ fflush(stdout);
+
+ char *args[] = { argv0, NULL };
+ char *envp[] = { ldpreload, NULL };
+
+ execve(argv[0], args, envp);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ char *args[] = { argv0, NULL };
+ char *envp[] = { "TEST=42", ldpreload, NULL };
+
+ execve(argv[0], args, envp);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ char *args[] = { argv0, "foo", "bar", NULL };
+ char *envp[] = { "TEST=43", "FOO=", ldpreload, NULL };
+
+ execve(argv[0], args, envp);
+ return EXIT_FAILURE;
+
+ /* execl(3) */
+ } else if (!skip--) {
+ setenv("TEST", "44", 1);
+
+ execl(argv[0], argv0, NULL);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ setenv("TEST", "45", 1);
+
+ execl(argv[0], argv0, "foo", "bar", NULL);
+ return EXIT_FAILURE;
+
+ /* execp(3), but not testing the p(ath) part */
+ } else if (!skip--) {
+ setenv("TEST", "46", 1);
+
+ execlp(argv[0], argv0, NULL);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ setenv("TEST", "47", 1);
+
+ execlp(argv[0], argv0, "foo", "bar", NULL);
+ return EXIT_FAILURE;
+
+ /* execle(3) */
+ } else if (!skip--) {
+ char *envp[] = { ldpreload, NULL };
+
+ execle(argv[0], argv0, NULL, envp);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ char *envp[] = { "TEST=48", ldpreload, NULL };
+
+ execle(argv[0], argv0, NULL, envp);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ char *envp[] = { "TEST=49", "FOO=", ldpreload, NULL };
+
+ execle(argv[0], argv0, "foo", "bar", NULL, envp);
+ return EXIT_FAILURE;
+
+ /* execv(3) */
+ } else if (!skip--) {
+ setenv("TEST", "50", 1);
+
+ char *args[] = { argv0, NULL };
+
+ execv(argv[0], args);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ setenv("TEST", "51", 1);
+
+ char *args[] = { argv0, "foo", "bar", NULL };
+
+ execv(argv[0], args);
+ return EXIT_FAILURE;
+
+ /* execvp(3), but not testing the p(ath) part */
+ } else if (!skip--) {
+ setenv("TEST", "52", 1);
+
+ char *args[] = { argv0, NULL };
+
+ execvp(argv[0], args);
+ return EXIT_FAILURE;
+ } else if (!skip--) {
+ setenv("TEST", "53", 1);
+
+ char *args[] = { argv0, "foo", "bar", NULL };
+
+ execvp(argv[0], args);
+ return EXIT_FAILURE;
+ }
+
+ printf("Done.\n");
+ return EXIT_SUCCESS;
+}
ruderich.org/simon / coloredstderr / coloredstderr.git / blobdiff