nexmon – Rev 1
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/* source: filan_main.c */
/* Copyright Gerhard Rieger */
/* Published under the GNU General Public License V.2, see file COPYING */
const char copyright[] = "filan by Gerhard Rieger - see http://www.dest-unreach.org/socat/";
#include "config.h"
#include "xioconfig.h"
#include "sysincludes.h"
#include "mytypes.h"
#include "compat.h"
#include "error.h"
#include "sycls.h"
#include "filan.h"
#define WITH_HELP 1
static void filan_usage(FILE *fd);
int main(int argc, const char *argv[]) {
const char **arg1, *a;
const char *filename = NULL, *waittimetxt;
unsigned int m = 0; /* first FD (default) */
unsigned int n = FD_SETSIZE; /* last excl. */
unsigned int i;
int style = 0;
struct timespec waittime = { 0, 0 };
FILE *fdout = stdout;
const char *outfname = NULL;
unsigned long fildes;
diag_set('p', strchr(argv[0], '/') ? strrchr(argv[0], '/')+1 : argv[0]);
arg1 = argv+1; --argc;
while (arg1[0] && (arg1[0][0] == '-')) {
switch (arg1[0][1]) {
#if WITH_HELP
case '?': case 'h':
filan_usage(stdout); exit(0);
#endif
#if LATER
case 'V': filan_version(stdout); exit(0);
#endif
case 'L': filan_followsymlinks = true; break;
case 'd': diag_set('d', NULL); break;
case 's': style = 1; break;
case 'r': filan_rawoutput = true; break;
case 'i': if (arg1[0][2]) {
a = *arg1+2;
} else {
++arg1, --argc;
if ((a = *arg1) == NULL) {
Error("option -i requires an argument");
filan_usage(stderr); exit(1);
}
}
m = strtoul(a, (char **)&a, 0);
n = m;
break;
case 'n': if (arg1[0][2]) {
a = *arg1+2;
} else {
++arg1, --argc;
if ((a = *arg1) == NULL) {
Error("option -n requires an argument");
filan_usage(stderr); exit(1);
}
}
n = strtoul(a, (char **)&a, 0);
break;
case 'f': if (arg1[0][2]) {
filename = *arg1+2;
} else {
++arg1, --argc;
if ((filename = *arg1) == NULL) {
Error("option -f requires an argument");
filan_usage(stderr); exit(1);
}
}
break;
case 'T': if (arg1[0][2]) {
waittimetxt = *arg1+2;
} else {
++arg1, --argc;
if ((waittimetxt = *arg1) == NULL) {
Error("option -T requires an argument");
filan_usage(stderr); exit(1);
}
}
{
double waittimedbl;
waittimedbl = strtod(waittimetxt, NULL);
waittime.tv_sec = waittimedbl;
waittime.tv_nsec = (waittimedbl-waittime.tv_sec) * 1000000000;
}
break;
case 'o': if (arg1[0][2]) {
outfname = *arg1+2;
} else {
++arg1, --argc;
if ((outfname = *arg1) == NULL) {
Error("option -o requires an argument");
filan_usage(stderr); exit(1);
}
}
break;
case '\0': break;
default:
diag_set_int('e', E_FATAL);
Error1("unknown option %s", arg1[0]);
#if WITH_HELP
filan_usage(stderr);
#endif
exit(1);
}
#if 0
if (arg1[0][1] == '\0')
break;
#endif
++arg1; --argc;
}
if (argc != 0) {
Error1("%d superfluous arguments", argc);
filan_usage(stderr);
exit(1);
}
if (outfname) {
/* special cases */
if (!strcmp(outfname,"stdin")) { fdout=stdin; }
else if (!strcmp(outfname,"stdout")) { fdout=stdout; }
else if (!strcmp(outfname,"stderr")) { fdout=stderr; }
/* file descriptor */
else if (*outfname == '+') {
a = outfname+1;
fildes = strtoul(a, (char **)&a, 0);
if ((fdout = fdopen(fildes, "w")) == NULL) {
Error2("can't fdopen file descriptor %lu: %s\n", fildes, strerror(errno));
exit(1);
}
} else {
/* file name */
if ((fdout = fopen(outfname, "w")) == NULL) {
Error2("can't fopen '%s': %s\n",
outfname, strerror(errno));
exit(1);
}
}
}
Nanosleep(&waittime, NULL);
if (style == 0) {
/* this style gives detailled infos, but requires a file descriptor */
if (filename) {
#if LATER /* this is just in case that S_ISSOCK does not work */
struct stat buf;
int fd;
if (Stat(filename, &buf) < 0) {
Error3("stat(\"%s\", %p): %s", filename, &buf, strerror(errno));
}
/* note: when S_ISSOCK was undefined, it always gives 0 */
if (S_ISSOCK(buf.st_mode)) {
Error("cannot analyze UNIX domain socket");
}
#endif
filan_file(filename, fdout);
} else {
if (m == n) {
++n;
}
for (i = m; i < n; ++i) {
filan_fd(i, fdout);
}
}
} else {
/* this style gives only type and path / socket addresses, and works from
file descriptor or filename (with restrictions) */
if (filename) {
/* filename: NULL means yet unknown; "" means no name at all */
#if LATER
int fd;
if ((fd =
Open(filename, O_RDONLY|O_NOCTTY|O_NONBLOCK
#ifdef O_LARGEFILE
|O_LARGEFILE
#endif
, 0700))
< 0) {
Debug2("open(\"%s\", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_LARGEFILE, 0700): %s",
filename, strerror(errno));
}
fdname(filename, fd, fdout, NULL);
#endif
fdname(filename, -1, fdout, NULL);
} else {
if (m == n) {
fdname("", m, fdout, NULL);
} else {
for (i = m; i < n; ++i) {
fdname("", i, fdout, "%5u ");
}
}
}
}
if (outfname && fdout != stdout && fdout != stderr) {
fclose(fdout);
}
return 0;
}
#if WITH_HELP
static void filan_usage(FILE *fd) {
fputs(copyright, fd); fputc('\n', fd);
fputs("Analyze file descriptors of the process\n", fd);
fputs("Usage:\n", fd);
fputs("filan [options]\n", fd);
fputs(" options:\n", fd);
#if LATER
fputs(" -V print version information to stdout, and exit\n", fd);
#endif
#if WITH_HELP
fputs(" -?|-h print this help text\n", fd);
fputs(" -d increase verbosity (use up to 4 times)\n", fd);
#endif
#if 0
fputs(" -ly[facility] log to syslog, using facility (default is daemon)\n", fd);
fputs(" -lf<logfile> log to file\n", fd);
fputs(" -ls log to stderr (default if no other log)\n", fd);
#endif
fputs(" -i<fdnum> only analyze this fd\n", fd);
fprintf(fd, " -n<fdnum> analyze all fds from 0 up to fdnum-1 (default: %u)\n", FD_SETSIZE);
fputs(" -s simple output with just type and socket address or path\n", fd);
/* fputs(" -c alternate device visualization\n", fd);*/
fputs(" -f<filename> analyze file system entry\n", fd);
fputs(" -T<seconds> wait before analyzing, useful to connect with debugger\n", fd);
fputs(" -r raw output for time stamps and rdev\n", fd);
fputs(" -L follow symbolic links instead of showing their properties\n", fd);
fputs(" -o<filename> output goes to filename, that can be:\n", fd);
fputs(" a regular file name, the output goes to that\n", fd);
fputs(" +<filedes> , output goes to the file descriptor (which must be open writable)\n", fd);
fputs(" the 3 special names stdin stdout and stderr\n", fd);
}
#endif /* WITH_HELP */