added website data, because it had heaps of good tutorials and info

1 files changed, 148 insertions, 0 deletions

diff --git a/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/ngetty-argv.c b/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/ngetty-argv.c
new file mode 100644
index 0000000..a8b943d
--- /dev/null
+++ b/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/ngetty-argv.c
@@ -0,0 +1,148 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/types.h>
+#include <time.h>
+#include <alloca.h>
+#include <grp.h>
+#include <termios.h>
+#include <sys/ioctl.h>
+#include "lib.h"
+#define UUU "unable to "
+
+void w(char *s) { write(2, s, str_len(s)); }
+void e(char *x0, char *x1) 
+  { w("\nngetty-argv: "); w(x0); w(x1); w("\n"); sleep(1); }
+/* sleep is needed to see the erros.  see the option clear also */
+
+unsigned int expand_string(char *tmp, char *string, char *user, char *tty) {
+  char *s=string, *pos=tmp, *exp, ch, found_one = 0;
+  for (; (ch=*s); s++) {
+    if (ch == '%') {
+      found_one = 1;
+      ch = s[1];
+      exp = user;
+
+      switch (ch) {
+      case 'T': exp = tty;
+      case 'U':
+	pos += (tmp) ? str_copy(pos, exp) : str_len(exp);
+	++s;
+	break;
+      case '%': /*  %%U -> %U */
+	++s;
+      default:
+	ch = *s;
+	goto non_special;
+      }
+    } else {
+    non_special:
+      if (tmp) *pos = ch;
+      ++pos;
+    }
+  }
+
+  if (found_one) {
+    if (tmp==0) return pos - tmp + 1;
+    else *pos = 0;
+  }
+  return 0;
+}
+
+int main(int argc, char **argv) {
+  char **arg=0, **ee, **aa, *in=0, *s, ch;
+  char *user, *tty, flagsetsid=0, flagdaemon=0, flagtty=0, *flagpid=0;
+  unsigned long n;
+  uid_t uid=0;
+  gid_t gid=0;
+
+  if (argc<2) {
+  usage:
+    e("usage:\n\tngetty-argv [Options][--]ArgvString [user [tty]]\n\n",
+      "\tArgvString:\t:/bin/sleep:hacker_sleep:39:other:args...\n"
+      "\tOptions:\t:-D:-S:-N:-C:-u123:-g59:-a45:-s3:-d/tmp:-r/var/tmp\n"
+      "\tOptions:\t:-e,HOME=/,TERM=linux:-p/var/run/ngetty.pid\n"
+      "\tExample:\t:-u106:-g506:-d/var/qmail:--:./bin/qmail-qread:queue\n");
+    return 100;
+  }
+  
+  user	=(argc>2) ? argv[2] : "";
+  tty	=(argc>3) ? argv[3] : "";
+
+  do {
+    n = expand_string(in, argv[1], user, tty);
+    if (n==0) break;
+    in = alloca(n);
+  } while (1);
+  if (in==0) in=argv[1];
+
+  ch = *in++;	 /* don't use '%' as split char */
+  if (ch == 0 || *in == 0) goto usage;
+  GLOBAL_split_plus(arg,in,ch, n,5);
+  if (n < 2) goto usage;
+
+  for (aa=arg; (s=*aa); aa++) {
+    if (*s != '-') break;
+    s += 2;
+    n=x_atoi(s);
+    switch (s[-1]) {
+    case 'e':
+      ee = 0;
+      ch = *s++;
+      if (ch) GLOBAL_split(ee,s,ch, n);
+      environ = ee;
+      break;
+    case 'D': flagdaemon=1; break;
+    case 'S': flagsetsid=1; break;
+    case 'N': flagtty=1; break;
+    case 'C': flagtty=2; break;
+    case 'p': if (*s) flagpid=s; break;
+    case 'g': gid = n; break;
+    case 'u': uid = n; break;
+    case 'a': alarm(n); break;
+    case 's': sleep(n); break;
+    case 'd': if (chdir(s))  { e(s, ": chdir error");  return 100; } break;
+    case 'r': if (chroot(s)) { e(s, ": chroot error"); return 100; } break;
+    case '-': aa++; goto do_it;
+    default:
+      e(s-2, " : unknown option");
+      return 1;
+    }
+  }
+
+ do_it:
+  if (flagdaemon) {
+    int pid;
+    while ((pid=fork()) <0) sleep(1);
+    if (pid) _exit(0);
+  }
+
+  if (flagsetsid) setsid();
+  if (flagtty==1) ioctl(0, TIOCNOTTY, (void *)1);
+  if (flagtty==2) ioctl(0, TIOCSCTTY, (void *)1);
+
+  if (flagpid) {
+    int fd = open(flagpid, O_RDWR | O_TRUNC | O_CREAT, 0644);
+    if (fd>=0) {
+      char tmp[3*sizeof(unsigned long)];
+      n=fmt_ulong(tmp, getpid());
+      tmp[n] = '\n';
+      write(fd, tmp, n+1);
+      close(fd);
+    }
+  }
+
+  if (uid || gid) {
+    if (gid==0) gid = uid;
+    if (setgroups(1,&gid) ||
+	setgid(gid) ||
+	setuid(uid)) { e(UUU, "set uidgid"); return 100; }
+  }
+  
+  s = *aa++;
+  if (s==0 || *aa==0) return 0;
+  if (aa[0][0] == 0) aa[0] = s;
+
+  execve(s, aa, environ);
+  e(s, ": exec error");
+  return 127;
+}