diff options
Diffstat (limited to 'src/eval.c')
| -rw-r--r-- | src/eval.c | 279 |
1 files changed, 189 insertions, 90 deletions
@@ -5,9 +5,11 @@ * Implementation of all the primary expressions. */ -#include "prelude.h" #include "eval.h" + +#include "atomic.h" #include "bar.h" +#include "bfs.h" #include "bfstd.h" #include "bftw.h" #include "color.h" @@ -22,14 +24,18 @@ #include "printf.h" #include "pwcache.h" #include "sanity.h" +#include "sighook.h" #include "stat.h" #include "trie.h" #include "xregex.h" +#include "xtime.h" + #include <errno.h> #include <fcntl.h> #include <fnmatch.h> #include <grp.h> #include <pwd.h> +#include <signal.h> #include <stdarg.h> #include <stdint.h> #include <stdio.h> @@ -37,6 +43,7 @@ #include <string.h> #include <strings.h> #include <sys/resource.h> +#include <sys/time.h> #include <sys/types.h> #include <time.h> #include <unistd.h> @@ -51,6 +58,8 @@ struct bfs_eval { enum bftw_action action; /** The bfs_eval() return value. */ int *ret; + /** The number of errors that have occurred. */ + size_t *nerrors; /** Whether to quit immediately. */ bool quit; }; @@ -58,12 +67,18 @@ struct bfs_eval { /** * Print an error message. */ -attr(printf(2, 3)) +_printf(2, 3) static void eval_error(struct bfs_eval *state, const char *format, ...) { + const struct bfs_ctx *ctx = state->ctx; + + ++*state->nerrors; + if (ctx->ignore_errors) { + return; + } + // By POSIX, any errors should be accompanied by a non-zero exit status *state->ret = EXIT_FAILURE; - const struct bfs_ctx *ctx = state->ctx; CFILE *cerr = ctx->cerr; bfs_error(ctx, "%pP: ", state->ftwbuf); @@ -122,11 +137,9 @@ static const struct bfs_stat *eval_stat(struct bfs_eval *state) { * Get the difference (in seconds) between two struct timespecs. */ static time_t timespec_diff(const struct timespec *lhs, const struct timespec *rhs) { - time_t ret = lhs->tv_sec - rhs->tv_sec; - if (lhs->tv_nsec < rhs->tv_nsec) { - --ret; - } - return ret; + struct timespec diff = *lhs; + timespec_sub(&diff, rhs); + return diff.tv_sec; } bool bfs_expr_cmp(const struct bfs_expr *expr, long long n) { @@ -245,8 +258,7 @@ bool eval_newer(const struct bfs_expr *expr, struct bfs_eval *state) { return false; } - return time->tv_sec > expr->reftime.tv_sec - || (time->tv_sec == expr->reftime.tv_sec && time->tv_nsec > expr->reftime.tv_nsec); + return timespec_cmp(time, &expr->reftime) > 0; } /** @@ -267,10 +279,10 @@ bool eval_time(const struct bfs_expr *expr, struct bfs_eval *state) { switch (expr->time_unit) { case BFS_DAYS: diff /= 60 * 24; - fallthru; + _fallthrough; case BFS_MINUTES: diff /= 60; - fallthru; + _fallthrough; case BFS_SECONDS: break; } @@ -396,7 +408,7 @@ static int eval_exec_finish(const struct bfs_expr *expr, const struct bfs_ctx *c if (expr->eval_fn == eval_exec) { if (bfs_exec_finish(expr->exec) != 0) { if (errno != 0) { - bfs_error(ctx, "%s %s: %s.\n", expr->argv[0], expr->argv[1], errstr()); + bfs_error(ctx, "${blu}%pq${rs} ${bld}%pq${rs}: %s.\n", expr->argv[0], expr->argv[1], errstr()); } ret = -1; } @@ -417,7 +429,7 @@ static int eval_exec_finish(const struct bfs_expr *expr, const struct bfs_ctx *c bool eval_exec(const struct bfs_expr *expr, struct bfs_eval *state) { bool ret = bfs_exec(expr->exec, state->ftwbuf) == 0; if (errno != 0) { - eval_error(state, "%s %s: %s.\n", expr->argv[0], expr->argv[1], errstr()); + eval_error(state, "${blu}%pq${rs} ${bld}%pq${rs}: %s.\n", expr->argv[0], expr->argv[1], errstr()); } return ret; } @@ -688,6 +700,34 @@ static int print_owner(FILE *file, const char *name, uintmax_t id, int *width) { } } +/** Print a file's modification time. */ +static int print_time(FILE *file, time_t time, time_t now) { + struct tm tm; + if (!localtime_r(&time, &tm)) { + goto error; + } + + char time_str[256]; + size_t time_ret; + + time_t six_months_ago = now - 6 * 30 * 24 * 60 * 60; + time_t tomorrow = now + 24 * 60 * 60; + if (time <= six_months_ago || time >= tomorrow) { + time_ret = strftime(time_str, sizeof(time_str), "%b %e %Y", &tm); + } else { + time_ret = strftime(time_str, sizeof(time_str), "%b %e %H:%M", &tm); + } + + if (time_ret == 0) { + goto error; + } + + return fprintf(file, " %s", time_str); + +error: + return fprintf(file, " %jd", (intmax_t)time); +} + /** * -f?ls action. */ @@ -744,28 +784,11 @@ bool eval_fls(const struct bfs_expr *expr, struct bfs_eval *state) { time_t time = statbuf->mtime.tv_sec; time_t now = ctx->now.tv_sec; - time_t six_months_ago = now - 6 * 30 * 24 * 60 * 60; - time_t tomorrow = now + 24 * 60 * 60; - struct tm tm; - if (!localtime_r(&time, &tm)) { - goto error; - } - char time_str[256]; - size_t time_ret; - if (time <= six_months_ago || time >= tomorrow) { - time_ret = strftime(time_str, sizeof(time_str), "%b %e %Y", &tm); - } else { - time_ret = strftime(time_str, sizeof(time_str), "%b %e %H:%M", &tm); - } - if (time_ret == 0) { - errno = EOVERFLOW; - goto error; - } - if (cfprintf(cfile, " %s${rs}", time_str) < 0) { + if (print_time(file, time, now) < 0) { goto error; } - if (cfprintf(cfile, " %pP", ftwbuf) < 0) { + if (cfprintf(cfile, "${rs} %pP", ftwbuf) < 0) { goto error; } @@ -997,6 +1020,13 @@ bool eval_xtype(const struct bfs_expr *expr, struct bfs_eval *state) { const struct BFTW *ftwbuf = state->ftwbuf; enum bfs_stat_flags flags = ftwbuf->stat_flags ^ (BFS_STAT_NOFOLLOW | BFS_STAT_TRYFOLLOW); enum bfs_type type = bftw_type(ftwbuf, flags); + + // GNU find treats ELOOP as a broken symbolic link for -xtype l + // (but not -L -type l) + if ((flags & BFS_STAT_TRYFOLLOW) && type == BFS_ERROR && errno == ELOOP) { + type = BFS_LNK; + } + if (type == BFS_ERROR) { eval_report_error(state); return false; @@ -1005,40 +1035,23 @@ bool eval_xtype(const struct bfs_expr *expr, struct bfs_eval *state) { } } -#if _POSIX_MONOTONIC_CLOCK > 0 -# define BFS_CLOCK CLOCK_MONOTONIC -#elif _POSIX_TIMERS > 0 -# define BFS_CLOCK CLOCK_REALTIME -#endif - /** - * Call clock_gettime(), if available. + * clock_gettime() wrapper. */ static int eval_gettime(struct bfs_eval *state, struct timespec *ts) { -#ifdef BFS_CLOCK - int ret = clock_gettime(BFS_CLOCK, ts); - if (ret != 0) { - bfs_warning(state->ctx, "%pP: clock_gettime(): %s.\n", state->ftwbuf, errstr()); + clockid_t clock = CLOCK_REALTIME; + +#if defined(_POSIX_MONOTONIC_CLOCK) && _POSIX_MONOTONIC_CLOCK >= 0 + if (sysoption(MONOTONIC_CLOCK) > 0) { + clock = CLOCK_MONOTONIC; } - return ret; -#else - return -1; #endif -} -/** - * Record an elapsed time. - */ -static void timespec_elapsed(struct timespec *elapsed, const struct timespec *start, const struct timespec *end) { - elapsed->tv_sec += end->tv_sec - start->tv_sec; - elapsed->tv_nsec += end->tv_nsec - start->tv_nsec; - if (elapsed->tv_nsec < 0) { - elapsed->tv_nsec += 1000000000L; - --elapsed->tv_sec; - } else if (elapsed->tv_nsec >= 1000000000L) { - elapsed->tv_nsec -= 1000000000L; - ++elapsed->tv_sec; + int ret = clock_gettime(clock, ts); + if (ret != 0) { + bfs_warning(state->ctx, "%pP: clock_gettime(): %s.\n", state->ftwbuf, errstr()); } + return ret; } /** @@ -1059,7 +1072,8 @@ static bool eval_expr(struct bfs_expr *expr, struct bfs_eval *state) { if (time) { if (eval_gettime(state, &end) == 0) { - timespec_elapsed(&expr->elapsed, &start, &end); + timespec_sub(&end, &start); + timespec_add(&expr->elapsed, &end); } } @@ -1128,20 +1142,7 @@ bool eval_comma(const struct bfs_expr *expr, struct bfs_eval *state) { } /** Update the status bar. */ -static void eval_status(struct bfs_eval *state, struct bfs_bar *bar, struct timespec *last_status, size_t count) { - struct timespec now; - if (eval_gettime(state, &now) == 0) { - struct timespec elapsed = {0}; - timespec_elapsed(&elapsed, last_status, &now); - - // Update every 0.1s - if (elapsed.tv_sec > 0 || elapsed.tv_nsec >= 100000000L) { - *last_status = now; - } else { - return; - } - } - +static void eval_status(struct bfs_eval *state, struct bfs_bar *bar, size_t count) { size_t width = bfs_bar_width(bar); if (width < 3) { return; @@ -1157,7 +1158,7 @@ static void eval_status(struct bfs_eval *state, struct bfs_bar *bar, struct time size_t rhslen = xstrwidth(rhs); if (3 + rhslen > width) { - dstresize(&rhs, 0); + dstrshrink(rhs, 0); rhslen = 0; } @@ -1201,7 +1202,7 @@ static void eval_status(struct bfs_eval *state, struct bfs_bar *bar, struct time } pathwidth += cwidth; } - dstresize(&status, lhslen); + dstrshrink(status, lhslen); if (dstrcat(&status, "...") != 0) { goto out; @@ -1284,7 +1285,7 @@ static void debug_stat(const struct bfs_ctx *ctx, const struct BFTW *ftwbuf, enu DEBUG_FLAG(flags, BFS_STAT_TRYFOLLOW); DEBUG_FLAG(flags, BFS_STAT_NOSYNC); - fprintf(stderr, ") == %d", err ? 0 : -1); + fprintf(stderr, ") == %d", err == 0 ? 0 : -1); if (err) { fprintf(stderr, " [%d]", err); @@ -1371,18 +1372,85 @@ struct callback_args { /** The status bar. */ struct bfs_bar *bar; - /** The time of the last status update. */ - struct timespec last_status; + /** The SIGALRM hook. */ + struct sighook *alrm_hook; + /** The interval timer. */ + struct timer *timer; + /** Flag set by SIGALRM. */ + atomic bool alrm_flag; + /** Flag set by SIGINFO. */ + atomic bool info_flag; + /** The number of files visited so far. */ size_t count; /** The set of seen files. */ struct trie *seen; + /** The number of errors that have occurred. */ + size_t nerrors; /** Eventual return value from bfs_eval(). */ int ret; }; +/** Update the status bar in response to SIGALRM. */ +static void eval_sigalrm(int sig, siginfo_t *info, void *ptr) { + struct callback_args *args = ptr; + store(&args->alrm_flag, true, relaxed); +} + +/** Show/hide the bar in response to SIGINFO. */ +static void eval_siginfo(int sig, siginfo_t *info, void *ptr) { + struct callback_args *args = ptr; + store(&args->info_flag, true, relaxed); +} + +/** Show the status bar. */ +static void eval_show_bar(struct callback_args *args) { + args->alrm_hook = sighook(SIGALRM, eval_sigalrm, args, SH_CONTINUE); + if (!args->alrm_hook) { + goto fail; + } + + args->bar = bfs_bar_show(); + if (!args->bar) { + goto fail; + } + + // Update the bar every 0.1s + struct timespec ival = { .tv_nsec = 100 * 1000 * 1000 }; + args->timer = xtimer_start(&ival); + if (!args->timer) { + goto fail; + } + + // Update the bar immediately + store(&args->alrm_flag, true, relaxed); + + return; + +fail: + bfs_warning(args->ctx, "Couldn't show status bar: %s.\n\n", errstr()); + + bfs_bar_hide(args->bar); + args->bar = NULL; + + sigunhook(args->alrm_hook); + args->alrm_hook = NULL; +} + +/** Hide the status bar. */ +static void eval_hide_bar(struct callback_args *args) { + xtimer_stop(args->timer); + args->timer = NULL; + + sigunhook(args->alrm_hook); + args->alrm_hook = NULL; + + bfs_bar_hide(args->bar); + args->bar = NULL; +} + /** * bftw() callback. */ @@ -1397,17 +1465,37 @@ static enum bftw_action eval_callback(const struct BFTW *ftwbuf, void *ptr) { state.ctx = ctx; state.action = BFTW_CONTINUE; state.ret = &args->ret; + state.nerrors = &args->nerrors; state.quit = false; - if (args->bar) { - eval_status(&state, args->bar, &args->last_status, args->count); + // Check whether SIGINFO was delivered and show/hide the bar + if (exchange(&args->info_flag, false, relaxed)) { + if (args->bar) { + eval_hide_bar(args); + } else { + eval_show_bar(args); + } + } + + if (exchange(&args->alrm_flag, false, relaxed)) { + eval_status(&state, args->bar, args->count); } if (ftwbuf->type == BFS_ERROR) { - if (!eval_should_ignore(&state, ftwbuf->error)) { - eval_error(&state, "%s.\n", xstrerror(ftwbuf->error)); - } state.action = BFTW_PRUNE; + + if (ftwbuf->error == ELOOP && ftwbuf->loopoff > 0) { + char *loop = strndup(ftwbuf->path, ftwbuf->loopoff); + if (loop) { + eval_error(&state, "Filesystem loop back to ${di}%pq${rs}\n", loop); + free(loop); + goto done; + } + } else if (eval_should_ignore(&state, ftwbuf->error)) { + goto done; + } + + eval_error(&state, "%s.\n", xstrerror(ftwbuf->error)); goto done; } @@ -1618,12 +1706,16 @@ int bfs_eval(struct bfs_ctx *ctx) { }; if (ctx->status) { - args.bar = bfs_bar_show(); - if (!args.bar) { - bfs_warning(ctx, "Couldn't show status bar: %s.\n\n", errstr()); - } + eval_show_bar(&args); } +#ifdef SIGINFO + int siginfo = SIGINFO; +#else + int siginfo = SIGUSR1; +#endif + struct sighook *info_hook = sighook(siginfo, eval_siginfo, &args, SH_CONTINUE); + struct trie seen; if (ctx->unique) { trie_init(&seen); @@ -1691,7 +1783,14 @@ int bfs_eval(struct bfs_ctx *ctx) { trie_destroy(&seen); } - bfs_bar_hide(args.bar); + sigunhook(info_hook); + if (args.bar) { + eval_hide_bar(&args); + } + + if (ctx->ignore_errors && args.nerrors > 0) { + bfs_warning(ctx, "Suppressed errors: %zu\n", args.nerrors); + } return args.ret; } |