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Commit 08094b9b authored by Alessandro Rubini's avatar Alessandro Rubini
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Documentation: removed tools/zio-dump.c, which is in topdir 

Signed-off-by: Alessandro Rubini's avatarAlessandro Rubini <rubini@gnudd.com>
Acked-by: 's avatarFederico Vaga <federico.vaga@gmail.com>
parent d7da8a0f
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Documentation/zio/device.txt
View file @ 08094b9b
......@@ -62,7 +62,8 @@ The full set of rules for data and control transfers is described
elsewhere (FIXME: link to other docs) but it is pretty intuitive once
you get the idea.
See tools/zio-dump.c for an example of generic and simple input
application that shows use of control and data files.
See the "zio-dump" host tool in the top-level zio dir for an example
of generic and simple input application that shows use of control and
data files.
Documentation/zio/tools/zio-dump.c deleted 100644 → 0
View file @ d7da8a0f
/*
* Trivial utility that reports data from ZIO input channels
*/
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "zio.h"
#include "zio-buffer.h"
#define FD_C 0
#define FD_D 1
unsigned char buf[1024*1024];
int main(int argc, char **argv)
{
FILE *f;
char *outfname;
int fd[2];
int i, j;
if (argc != 3) {
fprintf(stderr, "%s: use \"%s <ctrl-file> <data-file>\"\n",
argv[0], argv[0]);
exit(1);
}
for (i = 0; i < 2; i++) {
fd[i] = open(argv[i + 1], O_RDONLY);
if (fd[i] < 0) {
fprintf(stderr, "%s: %s: %s\n", argv[0], argv[i + 1],
strerror(errno));
exit(1);
}
}
/* the data channel is non-blocking */
fcntl(fd[FD_D], F_SETFL, fcntl(fd[FD_D], F_GETFL) | O_NONBLOCK);
/* always log data we read to some filename */
outfname = getenv("ZIO_DUMP_TO");
if (!outfname)
outfname = "/dev/null";
f = fopen(outfname, "w");
if (!f) {
fprintf(stderr, "%s: %s: %s\n", argv[0], outfname,
strerror(errno));
exit(1);
}
/* ensure proper strace information and output to pipes */
setlinebuf(stdout);
setbuf(f, NULL);
/* now read control and data, forever */
while (1) {
zio_control_t ctrl;
/* This is a blocking read to the control file */
i = read(fd[FD_C], &ctrl, sizeof(ctrl));
switch (i) {
case -1:
fprintf(stderr, "%s: %s: read(): %s\n",
argv[0], argv[1 + FD_C], strerror(errno));
exit(1);
case 0:
fprintf(stderr, "%s: %s: unexpected EOF\n",
argv[0], argv[1 + FD_C], strerror(errno));
exit(1);
default:
fprintf(stderr, "%s: ctrl: read %i bytes (exp %i)\n",
argv[0], i, sizeof(ctrl));
/* continue anyways */
case sizeof(ctrl):
break; /* ok */
}
printf("Ctrl: n %i, size %i, bits %i, flags %08x\n",
ctrl.ctrl.nsamples,
ctrl.ctrl.ssize,
ctrl.ctrl.sbits,
ctrl.ctrl.flags);
printf("Ctrl: stamp %li.%09li (%lli)\n",
ctrl.ctrl.tstamp.tv_sec,
ctrl.ctrl.tstamp.tv_nsec,
ctrl.ctrl.tstamp_extra);
/* FIXME: some control information is missing */
i = read(fd[FD_D], buf, sizeof(buf));
if (i < 0) {
fprintf(stderr, "%s: %s: read(): %s\n",
argv[0], argv[1 + FD_D], strerror(errno));
continue; /* next ctrl, let's see... */
}
if (!i) {
fprintf(stderr, "%s: %s: unexpected EOF\n",
argv[0], argv[1 + FD_D], strerror(errno));
continue;
}
if (i != ctrl.ctrl.nsamples * ctrl.ctrl.ssize) {
if (i == sizeof(buf)) {
fprintf(stderr, "%s: buffer too small\n",
argv[0]);
/* FIXME: empty the data channel */
} else {
fprintf(stderr, "%s: ctrl: read %i bytes "
"(exp %i)\n", argv[0], i,
ctrl.ctrl.nsamples * ctrl.ctrl.ssize);
}
/* continue anyways */
}
fwrite(buf, 1, i, f);
/* report data to stdout */
for (j = 0; j < i; j++) {
if (!(j & 0xf))
printf("Data:");
printf(" %02x", buf[j]);
if ((j & 0xf) == 0xf || j == i - 1)
putchar('\n');
}
putchar('\n');
}
}
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