filan_main.c

   1 /* source: filan_main.c */
   2 /* Copyright Gerhard Rieger */
   3 /* Published under the GNU General Public License V.2, see file COPYING */
   4
   5 const char copyright[] = "filan by Gerhard Rieger - see http://www.dest-unreach.org/socat/";
   6
   7 #include "config.h"
   8 #include "xioconfig.h"
   9 #include "sysincludes.h"
  10
  11 #include "mytypes.h"
  12 #include "compat.h"
  13 #include "error.h"
  14 #include "sycls.h"
  15 #include "filan.h"
  16
  17
  18 #define WITH_HELP 1
  19
  20 static void filan_usage(FILE *fd);
  21
  22
  23 int main(int argc, const char *argv[]) {
  24    const char **arg1, *a;
  25    const char *filename = NULL, *waittimetxt;
  26    unsigned int m = 0;          /* first FD (default) */
  27    unsigned int n = FD_SETSIZE; /* last excl. */
  28    unsigned int i;
  29    int style = 0;
  30    struct timespec waittime = { 0, 0 };
  31    FILE *fdout = stdout;
  32    const char *outfname = NULL;
  33    unsigned long fildes;
  34
  35    diag_set('p', strchr(argv[0], '/') ? strrchr(argv[0], '/')+1 : argv[0]);
  36
  37    arg1 = argv+1;  --argc;
  38    while (arg1[0] && (arg1[0][0] == '-')) {
  39       switch (arg1[0][1]) {
  40 #if WITH_HELP
  41       case '?': case 'h':
  42          filan_usage(stdout); exit(0);
  43 #endif
  44 #if LATER
  45       case 'V': filan_version(stdout); exit(0);
  46 #endif
  47       case 'L': filan_followsymlinks = true; break;
  48       case 'd': diag_set('d', NULL); break;
  49       case 's': style = 1; break;
  50       case 'r': filan_rawoutput = true; break;
  51       case 'i':  if (arg1[0][2]) {
  52             a = *arg1+2;
  53          } else {
  54             ++arg1, --argc;
  55             if ((a = *arg1) == NULL) {
  56                Error("option -i requires an argument");
  57                filan_usage(stderr); exit(1);
  58             }
  59          }
  60          m = strtoul(a, (char **)&a, 0);
  61          n = m;
  62          break;
  63       case 'n': if (arg1[0][2]) {
  64             a = *arg1+2;
  65          } else {
  66             ++arg1, --argc;
  67             if ((a = *arg1) == NULL) {
  68                Error("option -n requires an argument");
  69                filan_usage(stderr); exit(1);
  70             }
  71          }
  72          n = strtoul(a, (char **)&a, 0);
  73          break;
  74       case 'f': if (arg1[0][2]) {
  75             filename = *arg1+2;
  76          } else {
  77             ++arg1, --argc;
  78             if ((filename = *arg1) == NULL) {
  79                Error("option -f requires an argument");
  80                filan_usage(stderr); exit(1);
  81             }
  82          }
  83          break;
  84       case 'T': if (arg1[0][2]) {
  85             waittimetxt = *arg1+2;
  86          } else {
  87             ++arg1, --argc;
  88             if ((waittimetxt = *arg1) == NULL) {
  89                Error("option -T requires an argument");
  90                filan_usage(stderr); exit(1);
  91             }
  92          }
  93          {
  94             double waittimedbl;
  95             waittimedbl = strtod(waittimetxt, NULL);
  96             waittime.tv_sec  = waittimedbl;
  97             waittime.tv_nsec = (waittimedbl-waittime.tv_sec) * 1000000000;
  98          }
  99          break;
 100       case 'o':  if (arg1[0][2]) {
 101             outfname = *arg1+2;
 102          } else {
 103             ++arg1, --argc;
 104             if ((outfname = *arg1) == NULL) {
 105                Error("option -o requires an argument");
 106                filan_usage(stderr); exit(1);
 107             }
 108          }
 109          break;
 110       case '\0': break;
 111       default:
 112          diag_set_int('e', E_FATAL);
 113          Error1("unknown option %s", arg1[0]);
 114 #if WITH_HELP
 115          filan_usage(stderr);
 116 #endif
 117          exit(1);
 118       }
 119 #if 0
 120       if (arg1[0][1] == '\0')
 121          break;
 122 #endif
 123       ++arg1; --argc;
 124    }
 125    if (argc != 0) {
 126       Error1("%d superfluous arguments", argc);
 127       filan_usage(stderr);
 128       exit(1);
 129    }
 130    if (outfname) {
 131       /* special cases */
 132       if (!strcmp(outfname,"stdin")) { fdout=stdin; }
 133       else if (!strcmp(outfname,"stdout")) { fdout=stdout; }
 134       else if (!strcmp(outfname,"stderr")) { fdout=stderr; }
 135       /* file descriptor */
 136       else if (*outfname == '+') {
 137          a = outfname+1;
 138          fildes = strtoul(a, (char **)&a, 0);
 139          if ((fdout = fdopen(fildes, "w")) == NULL) {
 140             Error2("can't fdopen file descriptor %lu: %s\n", fildes, strerror(errno));
 141             exit(1);
 142          }
 143       } else {
 144          /* file name */
 145          if ((fdout = fopen(outfname, "w")) == NULL) {
 146             Error2("can't fopen '%s': %s\n",
 147                    outfname, strerror(errno));
 148             exit(1);
 149          }
 150       }
 151    }
 152
 153    Nanosleep(&waittime, NULL);
 154
 155    if (style == 0) {
 156       /* this style gives detailled infos, but requires a file descriptor */
 157       if (filename) {
 158 #if LATER /* this is just in case that S_ISSOCK does not work */
 159          struct stat buf;
 160          int fd;
 161
 162          if (Stat(filename, &buf) < 0) {
 163             Error3("stat(\"%s\", %p): %s", filename, &buf, strerror(errno));
 164          }
 165          /* note: when S_ISSOCK was undefined, it always gives 0 */
 166          if (S_ISSOCK(buf.st_mode)) {
 167             Error("cannot analyze UNIX domain socket");
 168          }
 169 #endif
 170          filan_file(filename, fdout);
 171       } else {
 172          if (m == n) {
 173             ++n;
 174          }
 175          for (i = m; i < n; ++i) {
 176             filan_fd(i, fdout);
 177          }
 178       }
 179    } else {
 180       /* this style gives only type and path / socket addresses, and works from
 181          file descriptor or filename (with restrictions) */
 182       if (filename) {
 183          /* filename: NULL means yet unknown; "" means no name at all */
 184 #if LATER
 185          int fd;
 186          if ((fd =
 187               Open(filename, O_RDONLY|O_NOCTTY|O_NONBLOCK
 188 #ifdef O_LARGEFILE
 189                    |O_LARGEFILE
 190 #endif
 191                    , 0700))
 192              < 0) {
 193             Debug2("open(\"%s\", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_LARGEFILE, 0700): %s",
 194                    filename, strerror(errno));
 195          }
 196          fdname(filename, fd, fdout, NULL);
 197 #endif
 198          fdname(filename, -1, fdout, NULL);
 199       } else {
 200          if (m == n) {
 201             fdname("", m, fdout, NULL);
 202          } else {
 203             for (i = m; i < n; ++i) {
 204                fdname("", i, fdout, "%5u ");
 205             }
 206          }
 207       }
 208    }
 209    if (outfname && fdout != stdout && fdout != stderr) {
 210       fclose(fdout);
 211    }
 212    return 0;
 213 }
 214
 215
 216 #if WITH_HELP
 217 static void filan_usage(FILE *fd) {
 218    fputs(copyright, fd); fputc('\n', fd);
 219    fputs("Analyze file descriptors of the process\n", fd);
 220    fputs("Usage:\n", fd);
 221    fputs("filan [options]\n", fd);
 222    fputs("   options:\n", fd);
 223 #if LATER
 224    fputs("      -V     print version information to stdout, and exit\n", fd);
 225 #endif
 226 #if WITH_HELP
 227    fputs("      -?|-h          print this help text\n", fd);
 228    fputs("      -d             increase verbosity (use up to 4 times)\n", fd);
 229 #endif
 230 #if 0
 231    fputs("      -ly[facility]  log to syslog, using facility (default is daemon)\n", fd);
 232    fputs("      -lf<logfile>   log to file\n", fd);
 233    fputs("      -ls            log to stderr (default if no other log)\n", fd);
 234 #endif
 235    fputs("      -i<fdnum>      only analyze this fd\n", fd);
 236    fprintf(fd, "      -n<fdnum>      analyze all fds from 0 up to fdnum-1 (default: %u)\n", FD_SETSIZE);
 237    fputs("      -s             simple output with just type and socket address or path\n", fd);
 238 /*   fputs("      -c             alternate device visualization\n", fd);*/
 239    fputs("      -f<filename>   analyze file system entry\n", fd);
 240    fputs("      -T<seconds>    wait before analyzing, useful to connect with debugger\n", fd);
 241    fputs("      -r             raw output for time stamps and rdev\n", fd);
 242    fputs("      -L             follow symbolic links instead of showing their properties\n", fd);
 243    fputs("      -o<filename>   output goes to filename, that can be:\n", fd);
 244    fputs("                     a regular file name, the output goes to that\n", fd);
 245    fputs("                     +<filedes> , output goes to the file descriptor (which must be open writable)\n", fd);
 246    fputs("                     the 3 special names stdin stdout and stderr\n", fd);
 247 }
 248 #endif /* WITH_HELP */