Author: Madhusudan.C.S <madhusudancs@gmail.com>
Description: Uses alloc instead of fixed PATH_MAX value
Bug-Debian: http://bugs.debian.org/496274
Index: b/proc/readproc.c
===================================================================
--- a/proc/readproc.c	2009-11-24 21:00:41.000000000 +1100
+++ b/proc/readproc.c	2009-11-24 21:00:44.000000000 +1100
@@ -1036,7 +1036,7 @@
  * and filled out proc_t structure.
  */
 proc_t * get_proc_stats(pid_t pid, proc_t *p) {
-	static char path[PATH_MAX], sbuf[1024];
+	static char path[32], sbuf[1024];
 	struct stat statbuf;
 
 	sprintf(path, "/proc/%d", pid);
Index: b/pwdx.c
===================================================================
--- a/pwdx.c	2009-11-24 20:53:02.000000000 +1100
+++ b/pwdx.c	2009-11-24 21:00:44.000000000 +1100
@@ -35,7 +35,6 @@
 
 int main(int argc, char* argv[])
 {
-     char buf[PATH_MAX+1];
      regex_t re;
      int i;
 
@@ -59,6 +58,7 @@
 
      for (i = 1; i < argc; i++) {
           if (regexec(&re, argv[i], 0, NULL, 0) != 0) {
+               char buf[27 + strlen (argv[i]) + 1];  // Constant 27 is the length of the error string "pwdx: ... "
                snprintf(buf, sizeof buf, "pwdx: invalid process id: %s\n", argv[i]);
                die(buf);
           }
@@ -68,9 +68,13 @@
 
      regfree(&re);
 
+     int alloclen = 128;
+     char *pathbuf = malloc(alloclen);
+
      for (i = 1; i < argc; i++) {
-          char * s = buf;
+          char * s;
           int len;
+          char buf[10 + strlen(argv[i]) + 1]; // Constant 10 is the length of strings "/proc/" + "/cwd" + 1
           
           // At this point, all arguments are in the form /proc/nnnn
           // or nnnn, so a simple check based on the first char is
@@ -82,14 +86,22 @@
 
           // buf contains /proc/nnnn/cwd symlink name on entry, the
           // target of that symlink on return
-          if ((len = readlink(buf, buf, PATH_MAX)) < 0) {
+          while ((len = readlink(buf, pathbuf, alloclen)) == alloclen) {
+               alloclen *= 2;
+               pathbuf = realloc(pathbuf, alloclen);
+          }
+
+          if (len < 0) {
                s = strerror(errno == ENOENT ? ESRCH : errno);
           } else {
-               buf[len] = 0;
+               pathbuf[len] = 0;
+               s = pathbuf;
           }
 
           printf("%s: %s\n", argv[i], s);
      }
 
+     free(pathbuf);
+
      return 0;
 }