runtests.c 42.8 KB
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/*
 * Run a set of tests, reporting results.
 *
 * Usage:
 *
 *      runtests [-b <build-dir>] [-s <source-dir>] <test-list>
 *      runtests -o [-b <build-dir>] [-s <source-dir>] <test>
 *
 * In the first case, expects a list of executables located in the given file,
 * one line per executable.  For each one, runs it as part of a test suite,
 * reporting results.  Test output should start with a line containing the
 * number of tests (numbered from 1 to this number), optionally preceded by
 * "1..", although that line may be given anywhere in the output.  Each
 * additional line should be in the following format:
 *
 *      ok <number>
 *      not ok <number>
 *      ok <number> # skip
 *      not ok <number> # todo
 *
 * where <number> is the number of the test.  An optional comment is permitted
 * after the number if preceded by whitespace.  ok indicates success, not ok
 * indicates failure.  "# skip" and "# todo" are a special cases of a comment,
 * and must start with exactly that formatting.  They indicate the test was
 * skipped for some reason (maybe because it doesn't apply to this platform)
 * or is testing something known to currently fail.  The text following either
 * "# skip" or "# todo" and whitespace is the reason.
 *
 * As a special case, the first line of the output may be in the form:
 *
 *      1..0 # skip some reason
 *
 * which indicates that this entire test case should be skipped and gives a
 * reason.
 *
 * Any other lines are ignored, although for compliance with the TAP protocol
 * all lines other than the ones in the above format should be sent to
 * standard error rather than standard output and start with #.
 *
 * This is a subset of TAP as documented in Test::Harness::TAP or
 * TAP::Parser::Grammar, which comes with Perl.
 *
 * If the -o option is given, instead run a single test and display all of its
 * output.  This is intended for use with failing tests so that the person
 * running the test suite can get more details about what failed.
 *
 * If built with the C preprocessor symbols SOURCE and BUILD defined, C TAP
 * Harness will export those values in the environment so that tests can find
 * the source and build directory and will look for tests under both
 * directories.  These paths can also be set with the -b and -s command-line
 * options, which will override anything set at build time.
 *
 * Any bug reports, bug fixes, and improvements are very much welcome and
 * should be sent to the e-mail address below.  This program is part of C TAP
 * Harness <http://www.eyrie.org/~eagle/software/c-tap-harness/>.
 *
 * Copyright 2000, 2001, 2004, 2006, 2007, 2008, 2009, 2010, 2011
 *     Russ Allbery <rra@stanford.edu>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
*/

/* Required for fdopen(), getopt(), and putenv(). */
#if defined(__STRICT_ANSI__) || defined(PEDANTIC)
# ifndef _XOPEN_SOURCE
#  define _XOPEN_SOURCE 500
# endif
#endif

#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

/* sys/time.h must be included before sys/resource.h on some platforms. */
#include <sys/resource.h>

/* AIX doesn't have WCOREDUMP. */
#ifndef WCOREDUMP
# define WCOREDUMP(status) ((unsigned)(status) & 0x80)
#endif

/*
 * Used for iterating through arrays.  Returns the number of elements in the
 * array (useful for a < upper bound in a for loop).
 */
#define ARRAY_SIZE(array) (sizeof(array) / sizeof((array)[0]))

/*
 * The source and build versions of the tests directory.  This is used to set
 * the SOURCE and BUILD environment variables and find test programs, if set.
 * Normally, this should be set as part of the build process to the test
 * subdirectories of $(abs_top_srcdir) and $(abs_top_builddir) respectively.
 */
#ifndef SOURCE
# define SOURCE NULL
#endif
#ifndef BUILD
# define BUILD NULL
#endif

/* Test status codes. */
enum test_status {
    TEST_FAIL,
    TEST_PASS,
    TEST_SKIP,
    TEST_INVALID
};

/* Indicates the state of our plan. */
enum plan_status {
    PLAN_INIT,                  /* Nothing seen yet. */
    PLAN_FIRST,                 /* Plan seen before any tests. */
    PLAN_PENDING,               /* Test seen and no plan yet. */
    PLAN_FINAL                  /* Plan seen after some tests. */
};

/* Error exit statuses for test processes. */
#define CHILDERR_DUP    100     /* Couldn't redirect stderr or stdout. */
#define CHILDERR_EXEC   101     /* Couldn't exec child process. */
#define CHILDERR_STDERR 102     /* Couldn't open stderr file. */

/* Structure to hold data for a set of tests. */
struct testset {
    char *file;                 /* The file name of the test. */
    char *path;                 /* The path to the test program. */
    enum plan_status plan;      /* The status of our plan. */
    unsigned long count;        /* Expected count of tests. */
    unsigned long current;      /* The last seen test number. */
    unsigned int length;        /* The length of the last status message. */
    unsigned long passed;       /* Count of passing tests. */
    unsigned long failed;       /* Count of failing lists. */
    unsigned long skipped;      /* Count of skipped tests (passed). */
    unsigned long allocated;    /* The size of the results table. */
    enum test_status *results;  /* Table of results by test number. */
    unsigned int aborted;       /* Whether the set was aborted. */
    int reported;               /* Whether the results were reported. */
    int status;                 /* The exit status of the test. */
    unsigned int all_skipped;   /* Whether all tests were skipped. */
    char *reason;               /* Why all tests were skipped. */
};

/* Structure to hold a linked list of test sets. */
struct testlist {
    struct testset *ts;
    struct testlist *next;
};

/*
 * Usage message.  Should be used as a printf format with four arguments: the
 * path to runtests, given three times, and the usage_description.  This is
 * split into variables to satisfy the pedantic ISO C90 limit on strings.
 */
static const char usage_message[] = "\
Usage: %s [-b <build-dir>] [-s <source-dir>] <test> ...\n\
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       %s [-b <build-dir>] [-s <source-dir>] -l <test-list> -L <log-file>\n\
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       %s -o [-b <build-dir>] [-s <source-dir>] <test>\n\
\n%s";
static const char usage_extra[] = "\
Options:\n\
    -b <build-dir>      Set the build directory to <build-dir>\n\
    -l <list>           Take the list of tests to run from <test-list>\n\
    -o                  Run a single test rather than a list of tests\n\
    -s <source-dir>     Set the source directory to <source-dir>\n\
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    -L <log-file>       Set log file for a list of tests\n\
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\n\
runtests normally runs each test listed on the command line.  With the -l\n\
option, it instead runs every test listed in a file.  With the -o option,\n\
it instead runs a single test and shows its complete output.\n";

/*
 * Header used for test output.  %s is replaced by the file name of the list
 * of tests.
 */
static const char banner[] = "\n\
Running all tests listed in %s.  If any tests fail, run the failing\n\
test program with runtests -o to see more details.\n\n";

/* Header for reports of failed tests. */
static const char header[] = "\n\
Failed Set                 Fail/Total (%) Skip Stat  Failing Tests\n\
-------------------------- -------------- ---- ----  ------------------------";

/* Include the file name and line number in malloc failures. */
#define xcalloc(n, size)  x_calloc((n), (size), __FILE__, __LINE__)
#define xmalloc(size)     x_malloc((size), __FILE__, __LINE__)
#define xrealloc(p, size) x_realloc((p), (size), __FILE__, __LINE__)
#define xstrdup(p)        x_strdup((p), __FILE__, __LINE__)

/*
 * __attribute__ is available in gcc 2.5 and later, but only with gcc 2.7
 * could you use the __format__ form of the attributes, which is what we use
 * (to avoid confusion with other macros).
 */
#ifndef __attribute__
# if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 7)
#  define __attribute__(spec)   /* empty */
# endif
#endif

/*
 * We use __alloc_size__, but it was only available in fairly recent versions
 * of GCC.  Suppress warnings about the unknown attribute if GCC is too old.
 * We know that we're GCC at this point, so we can use the GCC variadic macro
 * extension, which will still work with versions of GCC too old to have C99
 * variadic macro support.
 */
#if !defined(__attribute__) && !defined(__alloc_size__)
# if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 3)
#  define __alloc_size__(spec, args...) /* empty */
# endif
#endif

/*
 * LLVM and Clang pretend to be GCC but don't support all of the __attribute__
 * settings that GCC does.  For them, suppress warnings about unknown
 * attributes on declarations.  This unfortunately will affect the entire
 * compilation context, but there's no push and pop available.
 */
#if !defined(__attribute__) && (defined(__llvm__) || defined(__clang__))
# pragma GCC diagnostic ignored "-Wattributes"
#endif

/* Declare internal functions that benefit from compiler attributes. */
static void sysdie(const char *, ...)
    __attribute__((__nonnull__, __noreturn__, __format__(printf, 1, 2)));
static void *x_calloc(size_t, size_t, const char *, int)
    __attribute__((__alloc_size__(1, 2), __malloc__, __nonnull__));
static void *x_malloc(size_t, const char *, int)
    __attribute__((__alloc_size__(1), __malloc__, __nonnull__));
static void *x_realloc(void *, size_t, const char *, int)
    __attribute__((__alloc_size__(2), __malloc__, __nonnull__(3)));
static char *x_strdup(const char *, const char *, int)
    __attribute__((__malloc__, __nonnull__));

/*
 * Report a fatal error, including the results of strerror, and exit.
 */
static void
sysdie(const char *format, ...)
{
    int oerrno;
    va_list args;

    oerrno = errno;
    fflush(stdout);
    fprintf(stderr, "runtests: ");
    va_start(args, format);
    vfprintf(stderr, format, args);
    va_end(args);
    fprintf(stderr, ": %s\n", strerror(oerrno));
    exit(1);
}

/*
 * Allocate zeroed memory, reporting a fatal error and exiting on failure.
 */
static void *
x_calloc(size_t n, size_t size, const char *file, int line)
{
    void *p;

    n = (n > 0) ? n : 1;
    size = (size > 0) ? size : 1;
    p = calloc(n, size);
    if (p == NULL)
        sysdie("failed to calloc %lu bytes at %s line %d",
               (unsigned long) size, file, line);
    return p;
}

/*
 * Allocate memory, reporting a fatal error and exiting on failure.
 */
static void *
x_malloc(size_t size, const char *file, int line)
{
    void *p;

    p = malloc(size);
    if (p == NULL)
        sysdie("failed to malloc %lu bytes at %s line %d",
               (unsigned long) size, file, line);
    return p;
}

/*
 * Reallocate memory, reporting a fatal error and exiting on failure.
 */
static void *
x_realloc(void *p, size_t size, const char *file, int line)
{
    p = realloc(p, size);
    if (p == NULL)
        sysdie("failed to realloc %lu bytes at %s line %d",
               (unsigned long) size, file, line);
    return p;
}

/*
 * Copy a string, reporting a fatal error and exiting on failure.
 */
static char *
x_strdup(const char *s, const char *file, int line)
{
    char *p;
    size_t len;

    len = strlen(s) + 1;
    p = malloc(len);
    if (p == NULL)
        sysdie("failed to strdup %lu bytes at %s line %d",
               (unsigned long) len, file, line);
    memcpy(p, s, len);
    return p;
}

/*
 * Given a struct timeval, return the number of seconds it represents as a
 * double.  Use difftime() to convert a time_t to a double.
 */
static double
tv_seconds(const struct timeval *tv)
{
    return difftime(tv->tv_sec, 0) + tv->tv_usec * 1e-6;
}

/*
 * Given two struct timevals, return the difference in seconds.
 */
static double
tv_diff(const struct timeval *tv1, const struct timeval *tv0)
{
    return tv_seconds(tv1) - tv_seconds(tv0);
}

/*
 * Given two struct timevals, return the sum in seconds as a double.
 */
static double
tv_sum(const struct timeval *tv1, const struct timeval *tv2)
{
    return tv_seconds(tv1) + tv_seconds(tv2);
}

/*
 * Given a pointer to a string, skip any leading whitespace and return a
 * pointer to the first non-whitespace character.
 */
static const char *
skip_whitespace(const char *p)
{
    while (isspace((unsigned char)(*p)))
        p++;
    return p;
}

/*
 * Start a program, connecting its stdout to a pipe on our end and its stderr
 * to /dev/null, and storing the file descriptor to read from in the two
 * argument.  Returns the PID of the new process.  Errors are fatal.
 */
static pid_t
test_start(const char *path, int *fd)
{
    int fds[2], errfd;
    pid_t child;

    if (pipe(fds) == -1) {
        puts("ABORTED");
        fflush(stdout);
        sysdie("can't create pipe");
    }
    child = fork();
    if (child == (pid_t) -1) {
        puts("ABORTED");
        fflush(stdout);
        sysdie("can't fork");
    } else if (child == 0) {
        /* In child.  Set up our stdout and stderr. */
        errfd = open("/dev/null", O_WRONLY);
        if (errfd < 0)
            _exit(CHILDERR_STDERR);
        if (dup2(errfd, 2) == -1)
            _exit(CHILDERR_DUP);
        close(fds[0]);
        if (dup2(fds[1], 1) == -1)
            _exit(CHILDERR_DUP);

        /* Now, exec our process. */
        if (execl(path, path, (char *) 0) == -1)
            _exit(CHILDERR_EXEC);
    } else {
        /* In parent.  Close the extra file descriptor. */
        close(fds[1]);
    }
    *fd = fds[0];
    return child;
}

/*
 * Back up over the output saying what test we were executing.
 */
static void
test_backspace(struct testset *ts)
{
    unsigned int i;

    if (!isatty(STDOUT_FILENO))
        return;
    for (i = 0; i < ts->length; i++)
        putchar('\b');
    for (i = 0; i < ts->length; i++)
        putchar(' ');
    for (i = 0; i < ts->length; i++)
        putchar('\b');
    ts->length = 0;
}

/*
 * Read the plan line of test output, which should contain the range of test
 * numbers.  We may initialize the testset structure here if we haven't yet
 * seen a test.  Return true if initialization succeeded and the test should
 * continue, false otherwise.
 */
static int
test_plan(const char *line, struct testset *ts)
{
    unsigned long i;
    long n;

    /*
     * Accept a plan without the leading 1.. for compatibility with older
     * versions of runtests.  This will only be allowed if we've not yet seen
     * a test result.
     */
    line = skip_whitespace(line);
    if (strncmp(line, "1..", 3) == 0)
        line += 3;

    /*
     * Get the count, check it for validity, and initialize the struct.  If we
     * have something of the form "1..0 # skip foo", the whole file was
     * skipped; record that.  If we do skip the whole file, zero out all of
     * our statistics, since they're no longer relevant.  strtol is called
     * with a second argument to advance the line pointer past the count to
     * make it simpler to detect the # skip case.
     */
    n = strtol(line, (char **) &line, 10);
    if (n == 0) {
        line = skip_whitespace(line);
        if (*line == '#') {
            line = skip_whitespace(line + 1);
            if (strncasecmp(line, "skip", 4) == 0) {
                line = skip_whitespace(line + 4);
                if (*line != '\0') {
                    ts->reason = xstrdup(line);
                    ts->reason[strlen(ts->reason) - 1] = '\0';
                }
                ts->all_skipped = 1;
                ts->aborted = 1;
                ts->count = 0;
                ts->passed = 0;
                ts->skipped = 0;
                ts->failed = 0;
                return 0;
            }
        }
    }
    if (n <= 0) {
        puts("ABORTED (invalid test count)");
        ts->aborted = 1;
        ts->reported = 1;
        return 0;
    }
    if (ts->plan == PLAN_INIT && ts->allocated == 0) {
        ts->count = n;
        ts->allocated = n;
        ts->plan = PLAN_FIRST;
        ts->results = xmalloc(ts->count * sizeof(enum test_status));
        for (i = 0; i < ts->count; i++)
            ts->results[i] = TEST_INVALID;
    } else if (ts->plan == PLAN_PENDING) {
        if ((unsigned long) n < ts->count) {
            test_backspace(ts);
            printf("ABORTED (invalid test number %lu)\n", ts->count);
            ts->aborted = 1;
            ts->reported = 1;
            return 0;
        }
        ts->count = n;
        if ((unsigned long) n > ts->allocated) {
            ts->results = xrealloc(ts->results, n * sizeof(enum test_status));
            for (i = ts->allocated; i < ts->count; i++)
                ts->results[i] = TEST_INVALID;
            ts->allocated = n;
        }
        ts->plan = PLAN_FINAL;
    }
    return 1;
}

/*
 * Given a single line of output from a test, parse it and return the success
 * status of that test.  Anything printed to stdout not matching the form
 * /^(not )?ok \d+/ is ignored.  Sets ts->current to the test number that just
 * reported status.
 */
static void
test_checkline(const char *line, struct testset *ts)
{
    enum test_status status = TEST_PASS;
    const char *bail;
    char *end;
    long number;
    unsigned long i, current;
    int outlen;

    /* Before anything, check for a test abort. */
    bail = strstr(line, "Bail out!");
    if (bail != NULL) {
        bail = skip_whitespace(bail + strlen("Bail out!"));
        if (*bail != '\0') {
            size_t length;

            length = strlen(bail);
            if (bail[length - 1] == '\n')
                length--;
            test_backspace(ts);
            printf("ABORTED (%.*s)\n", (int) length, bail);
            ts->reported = 1;
        }
        ts->aborted = 1;
        return;
    }

    /*
     * If the given line isn't newline-terminated, it was too big for an
     * fgets(), which means ignore it.
     */
    if (line[strlen(line) - 1] != '\n')
        return;

    /* If the line begins with a hash mark, ignore it. */
    if (line[0] == '#')
        return;

    /* If we haven't yet seen a plan, look for one. */
    if (ts->plan == PLAN_INIT && isdigit((unsigned char)(*line))) {
        if (!test_plan(line, ts))
            return;
    } else if (strncmp(line, "1..", 3) == 0) {
        if (ts->plan == PLAN_PENDING) {
            if (!test_plan(line, ts))
                return;
        } else {
            test_backspace(ts);
            puts("ABORTED (multiple plans)");
            ts->aborted = 1;
            ts->reported = 1;
            return;
        }
    }

    /* Parse the line, ignoring something we can't parse. */
    if (strncmp(line, "not ", 4) == 0) {
        status = TEST_FAIL;
        line += 4;
    }
    if (strncmp(line, "ok", 2) != 0)
        return;
    line = skip_whitespace(line + 2);
    errno = 0;
    number = strtol(line, &end, 10);
    if (errno != 0 || end == line)
        number = ts->current + 1;
    current = number;
    if (number <= 0 || (current > ts->count && ts->plan == PLAN_FIRST)) {
        test_backspace(ts);
        printf("ABORTED (invalid test number %lu)\n", current);
        ts->aborted = 1;
        ts->reported = 1;
        return;
    }

    /* We have a valid test result.  Tweak the results array if needed. */
    if (ts->plan == PLAN_INIT || ts->plan == PLAN_PENDING) {
        ts->plan = PLAN_PENDING;
        if (current > ts->count)
            ts->count = current;
        if (current > ts->allocated) {
            unsigned long n;

            n = (ts->allocated == 0) ? 32 : ts->allocated * 2;
            if (n < current)
                n = current;
            ts->results = xrealloc(ts->results, n * sizeof(enum test_status));
            for (i = ts->allocated; i < n; i++)
                ts->results[i] = TEST_INVALID;
            ts->allocated = n;
        }
    }

    /*
     * Handle directives.  We should probably do something more interesting
     * with unexpected passes of todo tests.
     */
    while (isdigit((unsigned char)(*line)))
        line++;
    line = skip_whitespace(line);
    if (*line == '#') {
        line = skip_whitespace(line + 1);
        if (strncasecmp(line, "skip", 4) == 0)
            status = TEST_SKIP;
        if (strncasecmp(line, "todo", 4) == 0)
            status = (status == TEST_FAIL) ? TEST_SKIP : TEST_FAIL;
    }

    /* Make sure that the test number is in range and not a duplicate. */
    if (ts->results[current - 1] != TEST_INVALID) {
        test_backspace(ts);
        printf("ABORTED (duplicate test number %lu)\n", current);
        ts->aborted = 1;
        ts->reported = 1;
        return;
    }

    /* Good results.  Increment our various counters. */
    switch (status) {
        case TEST_PASS: ts->passed++;   break;
        case TEST_FAIL: ts->failed++;   break;
        case TEST_SKIP: ts->skipped++;  break;
        case TEST_INVALID:              break;
    }
    ts->current = current;
    ts->results[current - 1] = status;
    if (isatty(STDOUT_FILENO)) {
        test_backspace(ts);
        if (ts->plan == PLAN_PENDING)
            outlen = printf("%lu/?", current);
        else
            outlen = printf("%lu/%lu", current, ts->count);
        ts->length = (outlen >= 0) ? outlen : 0;
        fflush(stdout);
    }
}

/*
 * Print out a range of test numbers, returning the number of characters it
 * took up.  Takes the first number, the last number, the number of characters
 * already printed on the line, and the limit of number of characters the line
 * can hold.  Add a comma and a space before the range if chars indicates that
 * something has already been printed on the line, and print ... instead if
 * chars plus the space needed would go over the limit (use a limit of 0 to
 * disable this).
 */
static unsigned int
test_print_range(unsigned long first, unsigned long last, unsigned int chars,
                 unsigned int limit)
{
    unsigned int needed = 0;
    unsigned long n;

    for (n = first; n > 0; n /= 10)
        needed++;
    if (last > first) {
        for (n = last; n > 0; n /= 10)
            needed++;
        needed++;
    }
    if (chars > 0)
        needed += 2;
    if (limit > 0 && chars + needed > limit) {
        needed = 0;
        if (chars <= limit) {
            if (chars > 0) {
                printf(", ");
                needed += 2;
            }
            printf("...");
            needed += 3;
        }
    } else {
        if (chars > 0)
            printf(", ");
        if (last > first)
            printf("%lu-", first);
        printf("%lu", last);
    }
    return needed;
}

/*
 * Summarize a single test set.  The second argument is 0 if the set exited
 * cleanly, a positive integer representing the exit status if it exited
 * with a non-zero status, and a negative integer representing the signal
 * that terminated it if it was killed by a signal.
 */
static void
test_summarize(struct testset *ts, int status)
{
    unsigned long i;
    unsigned long missing = 0;
    unsigned long failed = 0;
    unsigned long first = 0;
    unsigned long last = 0;

    if (ts->aborted) {
        fputs("ABORTED", stdout);
        if (ts->count > 0)
            printf(" (passed %lu/%lu)", ts->passed, ts->count - ts->skipped);
    } else {
        for (i = 0; i < ts->count; i++) {
            if (ts->results[i] == TEST_INVALID) {
                if (missing == 0)
                    fputs("MISSED ", stdout);
                if (first && i == last)
                    last = i + 1;
                else {
                    if (first)
                        test_print_range(first, last, missing - 1, 0);
                    missing++;
                    first = i + 1;
                    last = i + 1;
                }
            }
        }
        if (first)
            test_print_range(first, last, missing - 1, 0);
        first = 0;
        last = 0;
        for (i = 0; i < ts->count; i++) {
            if (ts->results[i] == TEST_FAIL) {
                if (missing && !failed)
                    fputs("; ", stdout);
                if (failed == 0)
                    fputs("FAILED ", stdout);
                if (first && i == last)
                    last = i + 1;
                else {
                    if (first)
                        test_print_range(first, last, failed - 1, 0);
                    failed++;
                    first = i + 1;
                    last = i + 1;
                }
            }
        }
        if (first)
            test_print_range(first, last, failed - 1, 0);
        if (!missing && !failed) {
            fputs(!status ? "ok" : "dubious", stdout);
            if (ts->skipped > 0) {
                if (ts->skipped == 1)
                    printf(" (skipped %lu test)", ts->skipped);
                else
                    printf(" (skipped %lu tests)", ts->skipped);
            }
        }
    }
    if (status > 0)
        printf(" (exit status %d)", status);
    else if (status < 0)
        printf(" (killed by signal %d%s)", -status,
               WCOREDUMP(ts->status) ? ", core dumped" : "");
    putchar('\n');
}

/*
 * Given a test set, analyze the results, classify the exit status, handle a
 * few special error messages, and then pass it along to test_summarize() for
 * the regular output.  Returns true if the test set ran successfully and all
 * tests passed or were skipped, false otherwise.
 */
static int
test_analyze(struct testset *ts)
{
    if (ts->reported)
        return 0;
    if (ts->all_skipped) {
        if (ts->reason == NULL)
            puts("skipped");
        else
            printf("skipped (%s)\n", ts->reason);
        return 1;
    } else if (WIFEXITED(ts->status) && WEXITSTATUS(ts->status) != 0) {
        switch (WEXITSTATUS(ts->status)) {
        case CHILDERR_DUP:
            if (!ts->reported)
                puts("ABORTED (can't dup file descriptors)");
            break;
        case CHILDERR_EXEC:
            if (!ts->reported)
                puts("ABORTED (execution failed -- not found?)");
            break;
        case CHILDERR_STDERR:
            if (!ts->reported)
                puts("ABORTED (can't open /dev/null)");
            break;
        default:
            test_summarize(ts, WEXITSTATUS(ts->status));
            break;
        }
        return 0;
    } else if (WIFSIGNALED(ts->status)) {
        test_summarize(ts, -WTERMSIG(ts->status));
        return 0;
    } else if (ts->plan != PLAN_FIRST && ts->plan != PLAN_FINAL) {
        puts("ABORTED (no valid test plan)");
        ts->aborted = 1;
        return 0;
    } else {
        test_summarize(ts, 0);
        return (ts->failed == 0);
    }
}

845 846 847 848 849 850 851 852 853
static void
cond_fputs(const char *buffer, FILE *stream)
{
	if (!stream) {
		return;
	}

	fputs(buffer, stream);
}
854 855 856 857 858 859 860

/*
 * Runs a single test set, accumulating and then reporting the results.
 * Returns true if the test set was successfully run and all tests passed,
 * false otherwise.
 */
static int
861
test_run(struct testset *ts, FILE *logfile)
862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878
{
    pid_t testpid, child;
    int outfd, status;
    unsigned long i;
    FILE *output;
    char buffer[BUFSIZ];

    /* Run the test program. */
    testpid = test_start(ts->path, &outfd);
    output = fdopen(outfd, "r");
    if (!output) {
        puts("ABORTED");
        fflush(stdout);
        sysdie("fdopen failed");
    }

    /* Pass each line of output to test_checkline(). */
879 880
    while (!ts->aborted && fgets(buffer, sizeof(buffer), output)) {
        cond_fputs(buffer, logfile);
881
        test_checkline(buffer, ts);
882
    }
883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904
    if (ferror(output) || ts->plan == PLAN_INIT)
        ts->aborted = 1;
    test_backspace(ts);

    /*
     * Consume the rest of the test output, close the output descriptor,
     * retrieve the exit status, and pass that information to test_analyze()
     * for eventual output.
     */
    while (fgets(buffer, sizeof(buffer), output))
        ;
    fclose(output);
    child = waitpid(testpid, &ts->status, 0);
    if (child == (pid_t) -1) {
        if (!ts->reported) {
            puts("ABORTED");
            fflush(stdout);
        }
        sysdie("waitpid for %u failed", (unsigned int) testpid);
    }
    if (ts->all_skipped)
        ts->aborted = 0;
905 906
    if (WEXITSTATUS(ts->status) > 0)
        ts->failed++;
907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013
    status = test_analyze(ts);

    /* Convert missing tests to failed tests. */
    for (i = 0; i < ts->count; i++) {
        if (ts->results[i] == TEST_INVALID) {
            ts->failed++;
            ts->results[i] = TEST_FAIL;
            status = 0;
        }
    }
    return status;
}

/* Summarize a list of test failures. */
static void
test_fail_summary(const struct testlist *fails)
{
    struct testset *ts;
    unsigned int chars;
    unsigned long i, first, last, total;

    puts(header);

    /* Failed Set                 Fail/Total (%) Skip Stat  Failing (25)
       -------------------------- -------------- ---- ----  -------------- */
    for (; fails; fails = fails->next) {
        ts = fails->ts;
        total = ts->count - ts->skipped;
        printf("%-26.26s %4lu/%-4lu %3.0f%% %4lu ", ts->file, ts->failed,
               total, total ? (ts->failed * 100.0) / total : 0,
               ts->skipped);
        if (WIFEXITED(ts->status))
            printf("%4d  ", WEXITSTATUS(ts->status));
        else
            printf("  --  ");
        if (ts->aborted) {
            puts("aborted");
            continue;
        }
        chars = 0;
        first = 0;
        last = 0;
        for (i = 0; i < ts->count; i++) {
            if (ts->results[i] == TEST_FAIL) {
                if (first != 0 && i == last)
                    last = i + 1;
                else {
                    if (first != 0)
                        chars += test_print_range(first, last, chars, 19);
                    first = i + 1;
                    last = i + 1;
                }
            }
        }
        if (first != 0)
            test_print_range(first, last, chars, 19);
        putchar('\n');
    }
}

/*
 * Check whether a given file path is a valid test.  Currently, this checks
 * whether it is executable and is a regular file.  Returns true or false.
 */
static int
is_valid_test(const char *path)
{
    struct stat st;

    if (access(path, X_OK) < 0)
        return 0;
    if (stat(path, &st) < 0)
        return 0;
    if (!S_ISREG(st.st_mode))
        return 0;
    return 1;
}

/*
 * Given the name of a test, a pointer to the testset struct, and the source
 * and build directories, find the test.  We try first relative to the current
 * directory, then in the build directory (if not NULL), then in the source
 * directory.  In each of those directories, we first try a "-t" extension and
 * then a ".t" extension.  When we find an executable program, we return the
 * path to that program.  If none of those paths are executable, just fill in
 * the name of the test as is.
 *
 * The caller is responsible for freeing the path member of the testset
 * struct.
 */
static char *
find_test(const char *name, const char *source, const char *build)
{
    char *path;
    const char *bases[3], *suffix, *base;
    unsigned int i, j;
    const char *suffixes[3] = { "-t", ".t", "" };

    /* Possible base directories. */
    bases[0] = ".";
    bases[1] = build;
    bases[2] = source;

    /* Try each suffix with each base. */
    for (i = 0; i < ARRAY_SIZE(suffixes); i++) {
        suffix = suffixes[i];
        for (j = 0; j < ARRAY_SIZE(bases); j++) {
1014 1015
            unsigned int path_len;

1016 1017 1018
            base = bases[j];
            if (base == NULL)
                continue;
1019 1020 1021
            path_len = strlen(base) + strlen(name) + strlen(suffix) + 2;
            path = xmalloc(path_len);
            snprintf(path, path_len, "%s/%s%s", base, name, suffix);
1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142
            if (is_valid_test(path))
                return path;
            free(path);
            path = NULL;
        }
    }
    if (path == NULL)
        path = xstrdup(name);
    return path;
}

/*
 * Read a list of tests from a file, returning the list of tests as a struct
 * testlist.  Reports an error to standard error and exits if the list of
 * tests cannot be read.
 */
static struct testlist *
read_test_list(const char *filename)
{
    FILE *file;
    unsigned int line;
    size_t length;
    char buffer[BUFSIZ];
    struct testlist *listhead, *current;

    /* Create the initial container list that will hold our results. */
    listhead = xmalloc(sizeof(struct testlist));
    listhead->ts = NULL;
    listhead->next = NULL;
    current = NULL;

    /*
     * Open our file of tests to run and read it line by line, creating a new
     * struct testlist and struct testset for each line.
     */
    file = fopen(filename, "r");
    if (file == NULL)
        sysdie("can't open %s", filename);
    line = 0;
    while (fgets(buffer, sizeof(buffer), file)) {
        line++;
        length = strlen(buffer) - 1;
        if (buffer[length] != '\n') {
            fprintf(stderr, "%s:%u: line too long\n", filename, line);
            exit(1);
        }
        buffer[length] = '\0';
        if (current == NULL)
            current = listhead;
        else {
            current->next = xmalloc(sizeof(struct testlist));
            current = current->next;
            current->next = NULL;
        }
        current->ts = xcalloc(1, sizeof(struct testset));
        current->ts->plan = PLAN_INIT;
        current->ts->file = xstrdup(buffer);
        current->ts->reason = NULL;
    }
    fclose(file);

    /* Return the results. */
    return listhead;
}

/*
 * Build a list of tests from command line arguments.  Takes the argv and argc
 * representing the command line arguments and returns a newly allocated test
 * list.  The caller is responsible for freeing.
 */
static struct testlist *
build_test_list(char *argv[], int argc)
{
    int i;
    struct testlist *listhead, *current;

    /* Create the initial container list that will hold our results. */
    listhead = xmalloc(sizeof(struct testlist));
    listhead->ts = NULL;
    listhead->next = NULL;
    current = NULL;

    /* Walk the list of arguments and create test sets for them. */
    for (i = 0; i < argc; i++) {
        if (current == NULL)
            current = listhead;
        else {
            current->next = xmalloc(sizeof(struct testlist));
            current = current->next;
            current->next = NULL;
        }
        current->ts = xcalloc(1, sizeof(struct testset));
        current->ts->plan = PLAN_INIT;
        current->ts->file = xstrdup(argv[i]);
        current->ts->reason = NULL;
    }

    /* Return the results. */
    return listhead;
}

/* Free a struct testset. */
static void
free_testset(struct testset *ts)
{
    free(ts->file);
    free(ts->path);
    free(ts->results);
    if (ts->reason != NULL)
        free(ts->reason);
    free(ts);
}

/*
 * Run a batch of tests.  Takes two additional parameters: the root of the
 * source directory and the root of the build directory.  Test programs will
 * be first searched for in the current directory, then the build directory,
 * then the source directory.  Returns true iff all tests passed, and always
 * frees the test list that's passed in.
 */
static int
1143 1144
test_batch(struct testlist *tests, const char *source, const char *build,
           const char *logfile_name)
1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156
{
    size_t length;
    unsigned int i;
    unsigned int longest = 0;
    unsigned int count = 0;
    struct testset *ts;
    struct timeval start, end;
    struct rusage stats;
    struct testlist *failhead = NULL;
    struct testlist *failtail = NULL;
    struct testlist *current, *next;
    int succeeded;
1157
    FILE *logfile = NULL;
1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
    unsigned long total = 0;
    unsigned long passed = 0;
    unsigned long skipped = 0;
    unsigned long failed = 0;
    unsigned long aborted = 0;

    /* Walk the list of tests to find the longest name. */
    for (current = tests; current != NULL; current = current->next) {
        length = strlen(current->ts->file);
        if (length > longest)
            longest = length;
    }

    /*
     * Add two to longest and round up to the nearest tab stop.  This is how
     * wide the column for printing the current test name will be.
     */
    longest += 2;
    if (longest % 8)
        longest += 8 - (longest % 8);

    /* Start the wall clock timer. */
    gettimeofday(&start, NULL);

1182 1183 1184 1185 1186 1187 1188 1189
    /* Open the log (soft error). */
    if (logfile_name != NULL) {
        logfile = fopen(logfile_name, "w+");
        if (!logfile) {
            fprintf(stderr, "Could not open the log file.\n");
        }
    }

1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202
    /* Now, plow through our tests again, running each one. */
    for (current = tests; current != NULL; current = current->next) {
        ts = current->ts;

        /* Print out the name of the test file. */
        fputs(ts->file, stdout);
        for (i = strlen(ts->file); i < longest; i++)
            putchar('.');
        if (isatty(STDOUT_FILENO))
            fflush(stdout);

        /* Run the test. */
        ts->path = find_test(ts->file, source, build);
1203
        succeeded = test_run(ts, logfile);
1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
        fflush(stdout);

        /* Record cumulative statistics. */
        aborted += ts->aborted;
        total += ts->count + ts->all_skipped;
        passed += ts->passed;
        skipped += ts->skipped + ts->all_skipped;
        failed += ts->failed;
        count++;

        /* If the test fails, we shuffle it over to the fail list. */
        if (!succeeded) {
            if (failhead == NULL) {
                failhead = xmalloc(sizeof(struct testset));
                failtail = failhead;
            } else {
                failtail->next = xmalloc(sizeof(struct testset));
                failtail = failtail->next;
            }
            failtail->ts = ts;
            failtail->next = NULL;
        }
    }
    total -= skipped;

1229 1230 1231 1232 1233
    /* Close the log. */
    if (logfile) {
        fclose(logfile);
    }

1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314
    /* Stop the timer and get our child resource statistics. */
    gettimeofday(&end, NULL);
    getrusage(RUSAGE_CHILDREN, &stats);

    /* Summarize the failures and free the failure list. */
    if (failhead != NULL) {
        test_fail_summary(failhead);
        while (failhead != NULL) {
            next = failhead->next;
            free(failhead);
            failhead = next;
        }
    }

    /* Free the memory used by the test lists. */
    while (tests != NULL) {
        next = tests->next;
        free_testset(tests->ts);
        free(tests);
        tests = next;
    }

    /* Print out the final test summary. */
    putchar('\n');
    if (aborted != 0) {
        if (aborted == 1)
            printf("Aborted %lu test set", aborted);
        else
            printf("Aborted %lu test sets", aborted);
        printf(", passed %lu/%lu tests", passed, total);
    }
    else if (failed == 0)
        fputs("All tests successful", stdout);
    else
        printf("Failed %lu/%lu tests, %.2f%% okay", failed, total,
               (total - failed) * 100.0 / total);
    if (skipped != 0) {
        if (skipped == 1)
            printf(", %lu test skipped", skipped);
        else
            printf(", %lu tests skipped", skipped);
    }
    puts(".");
    printf("Files=%u,  Tests=%lu", count, total);
    printf(",  %.2f seconds", tv_diff(&end, &start));
    printf(" (%.2f usr + %.2f sys = %.2f CPU)\n",
           tv_seconds(&stats.ru_utime), tv_seconds(&stats.ru_stime),
           tv_sum(&stats.ru_utime, &stats.ru_stime));
    return (failed == 0 && aborted == 0);
}

/*
 * Run a single test case.  This involves just running the test program after
 * having done the environment setup and finding the test program.
 */
static void
test_single(const char *program, const char *source, const char *build)
{
    char *path;

    path = find_test(program, source, build);
    if (execl(path, path, (char *) 0) == -1)
        sysdie("cannot exec %s", path);
}

/*
 * Main routine.  Set the SOURCE and BUILD environment variables and then,
 * given a file listing tests, run each test listed.
 */
int
main(int argc, char *argv[])
{
    int option;
    int status = 0;
    int single = 0;
    char *source_env = NULL;
    char *build_env = NULL;
    const char *shortlist;
    const char *list = NULL;
    const char *source = SOURCE;
    const char *build = BUILD;
1315
    const char *logfile = NULL;
1316 1317
    struct testlist *tests;

1318
    while ((option = getopt(argc, argv, "b:hl:os:L:")) != EOF) {
1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335
        switch (option) {
        case 'b':
            build = optarg;
            break;
        case 'h':
            printf(usage_message, argv[0], argv[0], argv[0], usage_extra);
            exit(0);
            break;
        case 'l':
            list = optarg;
            break;
        case 'o':
            single = 1;
            break;
        case 's':
            source = optarg;
            break;
1336 1337 1338
        case 'L':
            logfile = optarg;
            break;
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351
        default:
            exit(1);
        }
    }
    argv += optind;
    argc -= optind;
    if ((list == NULL && argc < 1) || (list != NULL && argc > 0)) {
        fprintf(stderr, usage_message, argv[0], argv[0], argv[0], usage_extra);
        exit(1);
    }

    /* Set SOURCE and BUILD environment variables. */
    if (source != NULL) {
1352 1353 1354
        unsigned int len = strlen("SOURCE=") + strlen(source) + 1;
        source_env = xmalloc(len);
        snprintf(source_env, len, "SOURCE=%s", source);
1355 1356 1357 1358
        if (putenv(source_env) != 0)
            sysdie("cannot set SOURCE in the environment");
    }
    if (build != NULL) {
1359 1360 1361
        unsigned int len = strlen("BUILD=") + strlen(build) + 1;
        build_env = xmalloc(len);
        snprintf(build_env, len, "BUILD=%s", build);
1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376
        if (putenv(build_env) != 0)
            sysdie("cannot set BUILD in the environment");
    }

    /* Run the tests as instructed. */
    if (single)
        test_single(argv[0], source, build);
    else if (list != NULL) {
        shortlist = strrchr(list, '/');
        if (shortlist == NULL)
            shortlist = list;
        else
            shortlist++;
        printf(banner, shortlist);
        tests = read_test_list(list);
1377
        status = test_batch(tests, source, build, logfile) ? 0 : 1;
1378 1379
    } else {
        tests = build_test_list(argv, argc);
1380
        status = test_batch(tests, source, build, logfile) ? 0 : 1;
1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393
    }

    /* For valgrind cleanliness, free all our memory. */
    if (source_env != NULL) {
        putenv((char *) "SOURCE=");
        free(source_env);
    }
    if (build_env != NULL) {
        putenv((char *) "BUILD=");
        free(build_env);
    }
    exit(status);
}