From f7e0cad06fbabec0ea1a83d8913b6c213dc62c68 Mon Sep 17 00:00:00 2001
From: Matias Linares <matiaslina@openmailbox.org>
Date: Tue, 5 Jan 2016 21:21:04 -0300
Subject: Don't close STDIN for the child process.

Also this fixes a bug with the argv parameters. The first argument of
argv for execvp needs to be the name of the program that is running
---
 profile.c | 24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

diff --git a/profile.c b/profile.c
index 7bccfc4..eea5392 100644
--- a/profile.c
+++ b/profile.c
@@ -63,8 +63,6 @@ void spawn_child(char *progname, char **args, int fd)
         close(STDOUT_FILENO);
     }
 
-    close(STDIN_FILENO);
-
     if((execvp(progname, args)) == -1)
     {
         fprintf(stderr, "%d - %s\n", errno, strerror(errno));
@@ -93,16 +91,19 @@ int main(int argc, char **argv)
         usage(argv[0]);
         return 0;
     }
-
     prog_name = (char *) calloc(strlen(argv[offset]), sizeof(char));
     strcpy(prog_name, argv[offset]);
-    offset++;
 
     if(offset < argc)
-        args = calloc(argc - offset, sizeof(char*));
+        args = calloc(argc - offset + 1, sizeof(char*));
 
+    /* The last parameter of the argv needs to be NULL. */
     for(int i = offset; i < argc; i++)
-        args[i - offset] = argv[i];
+    {
+        args[i - offset] = (char *) calloc(strlen(argv[i]) + 1, sizeof(char));
+        strncpy(args[i - offset], argv[i], strlen(argv[i]));
+    }
+    args[argc - offset] = NULL;
 
     if((curpid = fork()) < 0)
     {
@@ -117,7 +118,7 @@ int main(int argc, char **argv)
         {
             /* Open the outfile with 664 permissions. */
             fd_out = open(out_file,
-                          O_WRONLY | O_CREAT,
+                          O_WRONLY | O_CREAT | O_TRUNC,
                           S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH);
         }
         spawn_child(prog_name, args, fd_out);
@@ -152,5 +153,14 @@ int main(int argc, char **argv)
 #endif
     }
 
+    /* Clean up */
+    if(prog_name)
+        free(prog_name);
+    for(int i = 0; i < argc - offset + 1; ++i)
+        if(args[i] != NULL)
+            free(args[i]);
+    if(args)
+        free(args);
+
     return status;
 }
-- 
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