Stress test

1 files changed, 326 insertions, 0 deletions

diff --git a/server/tests/stress-tests.c b/server/tests/stress-tests.c
new file mode 100644
index 00000000..8fdcf989
--- /dev/null
+++ b/server/tests/stress-tests.c
@@ -0,0 +1,326 @@
+/*
+   SSSD
+
+   Stress tests
+
+   Copyright (C) Jakub Hrozek <jhrozek@redhat.com>	2009
+
+   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 <signal.h>
+#include <stdlib.h>
+#include <talloc.h>
+#include <popt.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <pwd.h>
+#include <grp.h>
+#include <errno.h>
+
+#include "util/util.h"
+
+#define DEFAULT_START   10
+#define DEFAULT_STOP    20
+
+#define NAME_SIZE       255
+#define CHUNK           64
+
+
+/* How many tests failed */
+int failure_count;
+
+/* Be chatty */
+int verbose;
+
+/*
+ * Look up one user. If the user is not found using getpwnam, the success
+ * or failure depends on enoent_fail being set.
+ */
+int test_lookup_user(const char *name, int verbose, int enoent_fail)
+{
+    struct passwd *pwd = NULL;
+    int ret = 0;
+    int error;
+
+    errno = 0;
+    pwd = getpwnam(name);
+    error = errno;
+    if (pwd == NULL) {
+        if (errno == 0 || errno == ENOENT) {
+            ret = (enoent_fail == 1) ? ENOENT : 0;
+        }
+    }
+
+    if (ret != 0 && verbose) {
+        fprintf(stderr,
+                "getpwnam failed (name: %s): errno = %d, error = %s\n",
+                name, ret, strerror(ret));
+    }
+
+    return ret;
+}
+
+/*
+ * Look up one group. If the user is not found using getgrnam, the success
+ * or failure depends on enoent_fail being set.
+ */
+int test_lookup_group(const char *name, int verbose, int enoent_fail)
+{
+    struct group *grp = NULL;
+    int ret = 0;
+
+    errno = 0;
+    grp = getgrnam(name);
+    if (grp == NULL) {
+        if (errno == 0 || errno == ENOENT) {
+            ret = enoent_fail ? ENOENT : 0;
+        }
+    }
+
+    if (ret != 0 && verbose) {
+        fprintf(stderr,
+                "getgrnam failed (name %s): errno = %d, error = %s\n",
+                name, ret, strerror(ret));
+    }
+
+    return ret;
+}
+
+int run_one_testcase(const char *name, int group, int verbose, int enoent_fail)
+{
+    return group ? test_lookup_group(name, verbose, enoent_fail) : \
+                   test_lookup_user(name, verbose, enoent_fail);
+}
+
+/*
+ * Beware, has side-effects: changes global variable failure_count
+ */
+void child_handler(int signum)
+{
+    int status, ret;
+
+    while ((ret = wait(&status)) > 0) {
+        if (ret == -1) {
+            perror("wait");
+            exit(EXIT_FAILURE);
+        }
+
+        if (WIFEXITED(status)) {
+            ret = WEXITSTATUS(status);
+            if (ret) {
+                if (verbose) {
+                    fprintf(stderr,
+                            "A child exited with error code %d\n",
+                             WEXITSTATUS(status));
+                }
+                ++failure_count;
+            }
+        } else ++failure_count;
+    }
+}
+
+int generate_names(TALLOC_CTX *mem_ctx, const char *prefix,
+                   int start, int stop, char ***_out)
+{
+    char **out;
+    int num_names = stop-start+1;
+    int index = 0;
+
+    out = talloc_array(mem_ctx, char *, num_names+1);
+    if (out == NULL) {
+        return ENOMEM;
+    }
+
+    for (index = 0; index < num_names; ++index) {
+        out[index] = talloc_asprintf(mem_ctx, "%s%d", prefix, index);
+        if (out[index] == NULL) {
+            return ENOMEM;
+        }
+    }
+    out[index] = NULL;
+
+    *_out = out;
+    return EOK;
+}
+
+int read_names(TALLOC_CTX *mem_ctx, FILE *stream, char ***_out)
+{
+    char one_name[NAME_SIZE];
+    int n = 0;
+    int array_size = CHUNK;
+    int ret;
+    char **out;
+
+    out = talloc_array(mem_ctx, char *, CHUNK+1);
+    if (out == NULL) {
+        return ENOMEM;
+    }
+    while (fgets(one_name, NAME_SIZE, stream)) {
+        out[n] = talloc_strdup(mem_ctx, one_name);
+        if (out[n] == NULL) {
+            return ENOMEM;
+        }
+        if ((n++ % CHUNK) == 0) {
+            array_size += CHUNK;
+            out = talloc_realloc(mem_ctx, out, char *, array_size);
+            if (out == NULL) {
+                return ENOMEM;
+            }
+        }
+    }
+
+    if (ret = ferror(stream)) {
+        return ret;
+    }
+    out[n] = NULL;
+
+    *_out = out;
+    return EOK;
+}
+
+int main(int argc, const char *argv[])
+{
+    int opt;
+    poptContext pc;
+    int pc_start=DEFAULT_START;
+    int pc_stop=DEFAULT_STOP;
+    int pc_enoent_fail=0;
+    int pc_groups=0;
+    int pc_verbosity = 0;
+    char *pc_prefix = NULL;
+    TALLOC_CTX *ctx = NULL;
+    char **names = NULL;
+
+    int status, index, ret;
+    pid_t   pid;
+    struct sigaction action, old_action;
+
+    struct poptOption long_options[] = {
+        POPT_AUTOHELP
+        { "groups", 'g', POPT_ARG_NONE, &pc_groups, 0,
+                    "Lookup in groups instead of users" },
+        { "prefix", '\0', POPT_ARG_STRING, &pc_prefix, NULL,
+                    "The username prefix", NULL },
+        { "start",  '\0', POPT_ARG_INT | POPT_ARGFLAG_SHOW_DEFAULT,
+                    &pc_start, 0,
+                    "Start value to append to prefix", NULL },
+        { "stop",   '\0', POPT_ARG_INT | POPT_ARGFLAG_SHOW_DEFAULT,
+                    &pc_stop, 0,
+                    "End value to append to prefix", NULL },
+        { "enoent-fail", '\0', POPT_ARG_NONE, &pc_enoent_fail, 0,
+                    "Fail on not getting the requested NSS data (default: No)",
+                    NULL },
+        { "verbose", 'v', POPT_ARG_NONE, 0, 'v',
+                    "Be verbose" },
+        POPT_TABLEEND
+    };
+
+    /* parse the params */
+    pc = poptGetContext(argv[0], argc, argv, long_options, 0);
+    while ((opt = poptGetNextOpt(pc)) != -1) {
+        switch (opt) {
+            case 'v':
+                pc_verbosity = 1;
+                break;
+
+            default:
+                fprintf(stderr, "\nInvalid option %s: %s\n\n",
+                        poptBadOption(pc, 0), poptStrerror(opt));
+                poptPrintUsage(pc, stderr, 0);
+                return 1;
+        }
+    }
+    poptFreeContext(pc);
+
+    verbose = pc_verbosity;
+
+    if (pc_prefix) {
+        ret = generate_names(ctx, pc_prefix, pc_start, pc_stop, &names);
+        if (ret != EOK) {
+            if (verbose) {
+                errno = ret;
+                perror("generate_names");
+            }
+            exit(EXIT_FAILURE);
+        }
+    } else {
+        ret = read_names(ctx, stdin, &names);
+        if (ret != EOK) {
+            if (verbose) {
+                errno = ret;
+                perror("read_names");
+            }
+            exit(EXIT_FAILURE);
+        }
+    }
+
+    /* Reap the children in a handler asynchronously so we can
+     * somehow protect against too many processes */
+    action.sa_handler = child_handler;
+    sigemptyset(&action.sa_mask);
+    sigaddset(&action.sa_mask, SIGCHLD);
+    action.sa_flags = SA_NOCLDSTOP;
+
+    sigaction(SIGCHLD, &action, &old_action);
+
+    /* Fire up the child processes */
+    index = 0;
+    for (index=0; names[index]; index++) {
+        pid = fork();
+        if (pid == -1) {
+            /* Try again in hope that some child has exited */
+            if (errno == EAGAIN) {
+                continue;
+            }
+            perror("fork");
+            exit(EXIT_FAILURE);
+        } else if ( pid == 0 ) {
+            /* child */
+            ret = run_one_testcase(names[index], pc_groups,
+                                   pc_verbosity, pc_enoent_fail);
+            exit(ret);
+        }
+    }
+
+    /* Process the rest of the children here in main */
+    sigaction(SIGCHLD, &old_action, NULL);
+    while ((ret = wait(&status)) > 0) {
+        if (ret == -1) {
+            perror("wait");
+            exit(EXIT_FAILURE);
+        }
+
+        if (WIFEXITED(status)) {
+            ret = WEXITSTATUS(status);
+            if (ret) {
+                if (verbose) {
+                    fprintf(stderr,
+                            "A child exited with error code %d\n",
+                             WEXITSTATUS(status));
+                }
+                ++failure_count;
+            }
+        } else ++failure_count;
+    }
+
+    if (pc_verbosity) {
+        fprintf(stderr,
+                "Total tests run: %d\nPassed: %d\nFailed: %d\n",
+                index,
+                index - failure_count,
+                failure_count);
+    }
+    return (failure_count==0 ? EXIT_SUCCESS : EXIT_FAILURE);
+}