#include <unistd.h>
#include <getopt.h>
+
+#include "c.h"
+#include "debug.h"
+#include "xalloc.h"
#include "closestream.h"
#include "nls.h"
#include "strutils.h"
-#include "c.h"
+
+static UL_DEBUG_DEFINE_MASK(scriptreplay);
+UL_DEBUG_DEFINE_MASKNAMES(scriptreplay) = UL_DEBUG_EMPTY_MASKNAMES;
+
+#define SCRIPTREPLAY_DEBUG_INIT (1 << 1)
+#define SCRIPTREPLAY_DEBUG_TIMING (1 << 2)
+#define SCRIPTREPLAY_DEBUG_LOG (1 << 3)
+#define SCRIPTREPLAY_DEBUG_MISC (1 << 4)
+#define SCRIPTREPLAY_DEBUG_ALL 0xFFFF
+
+#define DBG(m, x) __UL_DBG(scriptreplay, SCRIPTREPLAY_DEBUG_, m, x)
+#define ON_DBG(m, x) __UL_DBG_CALL(scriptreplay, SCRIPTREPLAY_DEBUG_, m, x)
#define SCRIPT_MIN_DELAY 0.0001 /* from original sripreplay.pl */
+/*
+ * The script replay is driven by timing file where each entry describes one
+ * step in the replay. The timing step may refer input or output (or
+ * signal, extra informations, etc.)
+ *
+ * The step data are stored in log files, the right log file for the step is
+ * selected from replay_setup.
+ *
+ * TODO: move struct replay_{log,step,setup} to script-playutils.c to make it
+ * usable for scriptlive(1) code.
+ */
+
+enum {
+ REPLAY_TIMING_SIMPLE, /* timing info in classic "<delta> <offset>" format */
+ REPLAY_TIMING_MULTI /* multiple streams in format "<type> <delta> <offset|etc> */
+};
+
+struct replay_log {
+ const char *streams; /* 'I'nput, 'O'utput or both */
+ const char *filename;
+ FILE *fp;
+};
+
+struct replay_step {
+ char type; /* 'I'nput, 'O'utput, ... */
+ double delay;
+ size_t size;
+
+ struct replay_log *data;
+};
+
+struct replay_setup {
+ struct replay_log *logs;
+ size_t nlogs;
+
+ struct replay_step step; /* current step */
+
+ FILE *timing_fp;
+ const char *timing_filename;
+ int timing_format;
+ int timing_line;
+};
+
+static void scriptreplay_init_debug(void)
+{
+ __UL_INIT_DEBUG_FROM_ENV(scriptreplay, SCRIPTREPLAY_DEBUG_, 0, SCRIPTREPLAY_DEBUG);
+}
+
+static int ignore_line(FILE *f)
+{
+ int c;
+
+ while((c = fgetc(f)) != EOF && c != '\n');
+ if (ferror(f))
+ return -errno;
+
+ DBG(LOG, ul_debug(" ignore line"));
+ return 0;
+}
+
+static int replay_set_timing_file(struct replay_setup *stp, const char *filename)
+{
+ int c, rc = 0;
+
+ assert(stp);
+ assert(filename);
+
+ stp->timing_filename = filename;
+ stp->timing_line = 0;
+
+ stp->timing_fp = fopen(filename, "r");
+ if (!stp->timing_fp)
+ rc = -errno;
+ else {
+ /* detect timing file format */
+ c = fgetc(stp->timing_fp);
+ if (c != EOF) {
+ if (isdigit((unsigned int) c))
+ stp->timing_format = REPLAY_TIMING_SIMPLE;
+ else
+ stp->timing_format = REPLAY_TIMING_MULTI;
+ ungetc(c, stp->timing_fp);
+ } else if (ferror(stp->timing_fp))
+ rc = -errno;
+ }
+
+ if (rc) {
+ fclose(stp->timing_fp);
+ stp->timing_fp = NULL;
+ }
+
+ DBG(TIMING, ul_debug("timing file set to %s [rc=%d]", filename, rc));
+ return rc;
+}
+
+static int replay_associate_log(struct replay_setup *stp,
+ const char *streams, const char *filename)
+{
+ struct replay_log *log;
+ int rc;
+
+ assert(stp);
+ assert(streams);
+ assert(filename);
+
+ stp->logs = xrealloc(stp->logs, (stp->nlogs + 1) * sizeof(*log));
+ log = &stp->logs[stp->nlogs];
+ stp->nlogs++;
+
+ log->filename = filename;
+ log->streams = streams;
+
+ /* open the file and skip the first line */
+ log->fp = fopen(filename, "r");
+ rc = log->fp == NULL ? -errno : ignore_line(log->fp);
+
+ DBG(LOG, ul_debug("accociate log file %s with '%s' [rc=%d]", filename, streams, rc));
+ return rc;
+}
+
+static int is_wanted_stream(char type, const char *streams)
+{
+ if (streams == NULL)
+ return 1;
+ if (strchr(streams, type))
+ return 1;
+ return 0;
+}
+
+static int read_multistream_step(struct replay_step *step, FILE *f, char type)
+{
+ int rc = 0;
+ char nl;
+
+ switch (type) {
+ case 'O': /* output */
+ case 'I': /* input */
+ rc = fscanf(f, "%lf %zu%c\n", &step->delay, &step->size, &nl);
+ if (rc != 3 || nl != '\n')
+ rc = -EINVAL;
+ else
+ rc = 0;
+ break;
+
+ case 'S': /* signal */
+ rc = ignore_line(f); /* not implemnted yet */
+ break;
+
+ case 'H': /* header */
+ rc = ignore_line(f); /* not implemnted yet */
+ break;
+ default:
+ break;
+ }
+
+ DBG(TIMING, ul_debug(" read step delay & size [rc=%d]", rc));
+ return rc;
+}
+
+/* returns next step with pointer to the right log file for specified streams (e.g.
+ * "IOS" for in/out/signals) or all streams if stream is NULL.
+ *
+ * returns: 0 = success, <0 = error, 1 = done (EOF)
+ */
+static int replay_get_next_step(struct replay_setup *stp, char *streams, struct replay_step **xstep)
+{
+ struct replay_step *step;
+ int rc;
+
+ assert(stp);
+ assert(stp->timing_fp);
+ assert(xstep && *xstep);
+
+ /* old format supports only 'O'utput */
+ if (stp->timing_format == REPLAY_TIMING_SIMPLE &&
+ !is_wanted_stream('O', streams))
+ return 1;
+
+ DBG(TIMING, ul_debug("reading next step"));
+
+ step = &stp->step;
+ memset(step, 0, sizeof(*step));
+ *xstep = NULL;
+
+ do {
+ size_t i;
+
+ rc = 1; /* done */
+ if (feof(stp->timing_fp))
+ break;
+ stp->timing_line++;
+
+ switch (stp->timing_format) {
+ case REPLAY_TIMING_SIMPLE:
+ /* old format supports only output entries and format is the same
+ * as new format, but without <type> prefix */
+ rc = read_multistream_step(step, stp->timing_fp, 'O');
+ if (rc == 0)
+ step->type = 'O'; /* 'O'utput */
+ break;
+ case REPLAY_TIMING_MULTI:
+ rc = fscanf(stp->timing_fp, "%c ", &step->type);
+ if (rc != 1)
+ rc = -EINVAL;
+ else if (is_wanted_stream(step->type, streams))
+ rc = read_multistream_step(step,
+ stp->timing_fp,
+ step->type);
+ else {
+ rc = ignore_line(stp->timing_fp);
+ step->type = 0;
+ }
+ break;
+ }
+
+ if (rc)
+ break;; /* error */
+ if (!step->type)
+ continue; /* ignore this entry */
+
+ /* points step to the right log */
+ for (i = 0; i < stp->nlogs; i++) {
+ struct replay_log *log = &stp->logs[i];
+
+ assert(log->streams);
+
+ if (is_wanted_stream(step->type, log->streams)) {
+ step->data = log;
+ *xstep = step;
+ break;
+ }
+ }
+ } while (rc == 0 && *xstep == NULL);
+
+ DBG(TIMING, ul_debug(" reading next step done [rc=%d delay=%g size=%zu]",
+ rc, step->delay, step->size));
+ return rc;
+}
+
+/* return: 0 = success, <0 = error, 1 = done (EOF) */
+static int replay_emit_step_data(struct replay_step *step, int fd)
+{
+ size_t ct;
+ int rc = 0;
+ char buf[BUFSIZ];
+
+ assert(step);
+ assert(step->size);
+ assert(step->data);
+ assert(step->data->fp);
+
+ for (ct = step->size; ct > 0; ) {
+ size_t len, cc;
+
+ cc = ct > sizeof(buf) ? sizeof(buf): ct;
+ len = fread(buf, 1, cc, step->data->fp);
+
+ if (!len)
+ break;
+ ct -= len;
+ cc = write(fd, buf, len);
+ if (cc != len) {
+ rc = -errno;
+ break;
+ }
+ }
+
+ if (ct && ferror(step->data->fp))
+ rc = -errno;
+ if (ct && feof(step->data->fp))
+ rc = 1;
+
+ DBG(LOG, ul_debug(" log data emited [rc=%d]", rc));
+ return rc;
+}
+
static void __attribute__((__noreturn__))
usage(void)
{
#endif
}
-static void
-emit(FILE *fd, const char *filename, size_t ct)
-{
- char buf[BUFSIZ];
-
- while(ct) {
- size_t len, cc;
-
- cc = ct > sizeof(buf) ? sizeof(buf) : ct;
- len = fread(buf, 1, cc, fd);
-
- if (!len)
- break;
-
- ct -= len;
- cc = write(STDOUT_FILENO, buf, len);
- if (cc != len)
- err(EXIT_FAILURE, _("write to stdout failed"));
- }
-
- if (!ct)
- return;
- if (feof(fd))
- errx(EXIT_FAILURE, _("unexpected end of file on %s"), filename);
-
- err(EXIT_FAILURE, _("failed to read typescript file %s"), filename);
-}
-
-
int
main(int argc, char *argv[])
{
- FILE *tfile, *sfile;
+ struct replay_setup setup = { .nlogs = 0 };
+ struct replay_step *step;
+ int rc;
+
const char *sname = NULL, *tname = NULL;
double divi = 1, maxdelay = 0;
- int c, diviopt = FALSE, maxdelayopt = FALSE, idx;
- unsigned long line;
+ int diviopt = FALSE, maxdelayopt = FALSE, idx;
int ch;
static const struct option longopts[] = {
textdomain(PACKAGE);
close_stdout_atexit();
+ scriptreplay_init_debug();
+
while ((ch = getopt_long(argc, argv, "t:s:d:m:Vh", longopts, NULL)) != -1)
switch(ch) {
case 't':
divi = idx < argc ? getnum(argv[idx]) : 1;
if (maxdelay < 0)
maxdelay = 0;
- tfile = fopen(tname, "r");
- if (!tfile)
- err(EXIT_FAILURE, _("cannot open %s"), tname);
- sfile = fopen(sname, "r");
- if (!sfile)
- err(EXIT_FAILURE, _("cannot open %s"), sname);
-
- /* ignore the first typescript line */
- while((c = fgetc(sfile)) != EOF && c != '\n');
- for(line = 1; ; line++) {
- double delay;
- size_t blk;
- char nl;
- if (fscanf(tfile, "%lf %zu%c\n", &delay, &blk, &nl) != 3 ||
- nl != '\n') {
- if (feof(tfile))
- break;
- if (ferror(tfile))
- err(EXIT_FAILURE,
- _("failed to read timing file %s"), tname);
- errx(EXIT_FAILURE,
- _("timing file %s: line %lu: unexpected format"),
- tname, line);
- }
- delay /= divi;
-
- if (maxdelayopt && delay > maxdelay)
- delay = maxdelay;
+ if (replay_set_timing_file(&setup, tname) != 0)
+ err(EXIT_FAILURE, _("cannot open %s"), tname);
- if (delay > SCRIPT_MIN_DELAY)
- delay_for(delay);
+ if (replay_associate_log(&setup, "O", sname) != 0)
+ err(EXIT_FAILURE, _("cannot open %s"), sname);
- emit(sfile, sname, blk);
- }
+ do {
+ rc = replay_get_next_step(&setup, "O", &step);
+ if (rc)
+ break;
- fclose(sfile);
- fclose(tfile);
+ step->delay /= divi;
+ if (maxdelayopt && step->delay > maxdelay)
+ step->delay = maxdelay;
+ if (step->delay > SCRIPT_MIN_DELAY)
+ delay_for(step->delay);
+
+ rc = replay_emit_step_data(step, STDOUT_FILENO);
+ } while (rc == 0);
+
+ if (step && rc < 0)
+ err(EXIT_FAILURE, _("%s: log file error"), step->data->filename);
+ else if (rc < 0)
+ err(EXIT_FAILURE, _("%s: line %d: timing file error"),
+ setup.timing_filename,
+ setup.timing_line);
printf("\n");
exit(EXIT_SUCCESS);
}
projects / thirdparty / util-linux.git / commitdiff
