filan_main.c

   1 /* source: filan_main.c */
   2 /* Copyright Gerhard Rieger and contributors (see file CHANGES) */
   3 /* Published under the GNU General Public License V.2, see file COPYING */
   4
   5 const char copyright[] = "filan by Gerhard Rieger and contributors - 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 = arg1[0][1]; break;
  50       case 'S': style = arg1[0][1]; break;
  51       case 'r': filan_rawoutput = true; break;
  52       case 'i':  if (arg1[0][2]) {
  53             a = *arg1+2;
  54          } else {
  55             ++arg1, --argc;
  56             if ((a = *arg1) == NULL) {
  57                Error("option -i requires an argument");
  58                filan_usage(stderr); exit(1);
  59             }
  60          }
  61          m = strtoul(a, (char **)&a, 0);
  62          n = m;
  63          break;
  64       case 'n': if (arg1[0][2]) {
  65             a = *arg1+2;
  66          } else {
  67             ++arg1, --argc;
  68             if ((a = *arg1) == NULL) {
  69                Error("option -n requires an argument");
  70                filan_usage(stderr); exit(1);
  71             }
  72          }
  73          n = strtoul(a, (char **)&a, 0);
  74          break;
  75       case 'f': if (arg1[0][2]) {
  76             filename = *arg1+2;
  77          } else {
  78             ++arg1, --argc;
  79             if ((filename = *arg1) == NULL) {
  80                Error("option -f requires an argument");
  81                filan_usage(stderr); exit(1);
  82             }
  83          }
  84          break;
  85       case 'T': if (arg1[0][2]) {
  86             waittimetxt = *arg1+2;
  87          } else {
  88             ++arg1, --argc;
  89             if ((waittimetxt = *arg1) == NULL) {
  90                Error("option -T requires an argument");
  91                filan_usage(stderr); exit(1);
  92             }
  93          }
  94          {
  95             double waittimedbl;
  96             waittimedbl = strtod(waittimetxt, NULL);
  97             waittime.tv_sec  = waittimedbl;
  98             waittime.tv_nsec = (waittimedbl-waittime.tv_sec) * 1000000000;
  99          }
 100          break;
 101       case 'o':  if (arg1[0][2]) {
 102             outfname = *arg1+2;
 103          } else {
 104             ++arg1, --argc;
 105             if ((outfname = *arg1) == NULL) {
 106                Error("option -o requires an argument");
 107                filan_usage(stderr); exit(1);
 108             }
 109          }
 110          break;
 111       case '\0': break;
 112       default:
 113          diag_set_int('e', E_FATAL);
 114          Error1("unknown option %s", arg1[0]);
 115 #if WITH_HELP
 116          filan_usage(stderr);
 117 #endif
 118          exit(1);
 119       }
 120 #if 0
 121       if (arg1[0][1] == '\0')
 122          break;
 123 #endif
 124       ++arg1; --argc;
 125    }
 126    if (argc != 0) {
 127       Error1("%d superfluous arguments", argc);
 128       filan_usage(stderr);
 129       exit(1);
 130    }
 131    if (outfname) {
 132       /* special cases */
 133       if (!strcmp(outfname,"stdin")) { fdout=stdin; }
 134       else if (!strcmp(outfname,"stdout")) { fdout=stdout; }
 135       else if (!strcmp(outfname,"stderr")) { fdout=stderr; }
 136       /* file descriptor */
 137       else if (*outfname == '+') {
 138          a = outfname+1;
 139          fildes = strtoul(a, (char **)&a, 0);
 140          if ((fdout = fdopen(fildes, "w")) == NULL) {
 141             Error2("can't fdopen file descriptor %lu: %s\n", fildes, strerror(errno));
 142             exit(1);
 143          }
 144       } else {
 145          /* file name */
 146          if ((fdout = fopen(outfname, "w")) == NULL) {
 147             Error2("can't fopen '%s': %s\n",
 148                    outfname, strerror(errno));
 149             exit(1);
 150          }
 151       }
 152    }
 153
 154    Nanosleep(&waittime, NULL);
 155
 156    if (style == 0) {
 157       /* this style gives detailled infos, but requires a file descriptor */
 158       if (filename) {
 159 #if LATER /* this is just in case that S_ISSOCK does not work */
 160          struct stat buf;
 161          int fd;
 162
 163          if (Stat(filename, &buf) < 0) {
 164             Error3("stat(\"%s\", %p): %s", filename, &buf, strerror(errno));
 165          }
 166          /* note: when S_ISSOCK was undefined, it always gives 0 */
 167          if (S_ISSOCK(buf.st_mode)) {
 168             Error("cannot analyze UNIX domain socket");
 169          }
 170 #endif
 171          filan_file(filename, fdout);
 172       } else {
 173          if (m == n) {
 174             ++n;
 175          }
 176          for (i = m; i < n; ++i) {
 177             filan_fd(i, fdout);
 178          }
 179       }
 180    } else {
 181       /* this style gives only type and path / socket addresses, and works from
 182          file descriptor or filename (with restrictions) */
 183       if (filename) {
 184          /* filename: NULL means yet unknown; "" means no name at all */
 185 #if LATER
 186          int fd;
 187          if ((fd =
 188               Open(filename, O_RDONLY|O_NOCTTY|O_NONBLOCK
 189 #ifdef O_LARGEFILE
 190                    |O_LARGEFILE
 191 #endif
 192                    , 0700))
 193              < 0) {
 194             Debug2("open(\"%s\", O_RDONLY|O_NOCTTY|O_NONBLOCK|O_LARGEFILE, 0700): %s",
 195                    filename, strerror(errno));
 196          }
 197          fdname(filename, fd, fdout, NULL, style);
 198 #endif
 199          fdname(filename, -1, fdout, NULL, style);
 200       } else {
 201          if (m == n) {
 202             fdname("", m, fdout, NULL, style);
 203          } else {
 204             for (i = m; i < n; ++i) {
 205                fdname("", i, fdout, "%5u ", style);
 206             }
 207          }
 208       }
 209    }
 210    if (outfname && fdout != stdout && fdout != stderr) {
 211       fclose(fdout);
 212    }
 213    return 0;
 214 }
 215
 216
 217 #if WITH_HELP
 218 static void filan_usage(FILE *fd) {
 219    fputs(copyright, fd); fputc('\n', fd);
 220    fputs("Analyze file descriptors of the process\n", fd);
 221    fputs("Usage:\n", fd);
 222    fputs("filan [options]\n", fd);
 223    fputs("   options:\n", fd);
 224 #if LATER
 225    fputs("      -V     print version information to stdout, and exit\n", fd);
 226 #endif
 227 #if WITH_HELP
 228    fputs("      -?|-h          print this help text\n", fd);
 229    fputs("      -d             increase verbosity (use up to 4 times)\n", fd);
 230 #endif
 231 #if 0
 232    fputs("      -ly[facility]  log to syslog, using facility (default is daemon)\n", fd);
 233    fputs("      -lf<logfile>   log to file\n", fd);
 234    fputs("      -ls            log to stderr (default if no other log)\n", fd);
 235 #endif
 236    fputs("      -i<fdnum>      only analyze this fd\n", fd);
 237    fprintf(fd, "      -n<fdnum>      analyze all fds from 0 up to fdnum-1 (default: %u)\n", FD_SETSIZE);
 238    fputs("      -s             simple output with just type and socket address or path\n", fd);
 239    fputs("      -S             like -s but improved format and contents\n", fd);
 240 /*   fputs("      -c             alternate device visualization\n", fd);*/
 241    fputs("      -f<filename>   analyze file system entry\n", fd);
 242    fputs("      -T<seconds>    wait before analyzing, useful to connect with debugger\n", fd);
 243    fputs("      -r             raw output for time stamps and rdev\n", fd);
 244    fputs("      -L             follow symbolic links instead of showing their properties\n", fd);
 245    fputs("      -o<filename>   output goes to filename, that can be:\n", fd);
 246    fputs("                     a regular file name, the output goes to that\n", fd);
 247    fputs("                     +<filedes> , output goes to the file descriptor (which must be open writable)\n", fd);
 248    fputs("                     the 3 special names stdin stdout and stderr\n", fd);
 249 }
 250 #endif /* WITH_HELP */