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(start_job_command): Save and restore environ around vfork call.

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(search_path): Function #if 0'd out.
(exec_command): Use execvp instead of search_path.
This commit is contained in:
Roland McGrath 1995-01-15 15:57:48 +00:00
parent e167e0a3c2
commit 37358a9a82
1 changed files with 45 additions and 55 deletions
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100
job.c
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@ -689,6 +689,8 @@ start_job_command (child)
{
/* Fork the child process. */
char *parent_environ;
#ifdef POSIX
(void) sigprocmask (SIG_BLOCK, &fatal_signal_set, (sigset_t *) 0);
#else
@ -698,7 +700,9 @@ start_job_command (child)
#endif
child->remote = 0;
parent_environ = environ;
child->pid = vfork ();
environ = parent_environ; /* Restore value child may have clobbered. */
if (child->pid == 0)
{
/* We are the child side. */
@ -1073,6 +1077,8 @@ child_execute_job (stdin_fd, stdout_fd, argv, envp)
exec_command (argv, envp);
}
#if 0
/* Search PATH for FILE.
If successful, store the full pathname in PROGRAM and return 1.
If not sucessful, return zero. */
@ -1171,6 +1177,7 @@ search_path (file, path, program)
return 0;
}
#endif /* search_path commented out */
/* Replace the current process with one running the command in ARGV,
with environment ENVP. This function does not return. */
@ -1180,71 +1187,54 @@ exec_command (argv, envp)
char **argv, **envp;
{
char *shell, *path;
PATH_VAR (program);
register char **ep;
shell = path = 0;
for (ep = envp; *ep != 0; ++ep)
{
if (shell == 0 && !strncmp(*ep, "SHELL=", 6))
shell = &(*ep)[6];
else if (path == 0 && !strncmp(*ep, "PATH=", 5))
path = &(*ep)[5];
else if (path != 0 && shell != 0)
break;
}
/* Be the user, permanently. */
child_access ();
if (!search_path (argv[0], path, program))
error ("%s: Command not found", argv[0]);
else
/* Run the program. */
environ = envp;
execvp (argv[0], argv);
switch (errno)
{
/* Run the program. */
execve (program, argv, envp);
case ENOENT:
error ("%s: Command not found", argv[0]);
break;
case ENOEXEC:
{
/* The file is not executable. Try it as a shell script. */
char *shell;
char **new_argv;
int argc;
if (errno == ENOEXEC)
{
PATH_VAR (shell_program);
char *shell_path;
if (shell == 0)
shell_path = default_shell;
else
{
if (search_path (shell, path, shell_program))
shell_path = shell_program;
else
{
shell_path = 0;
error ("%s: Shell program not found", shell);
}
}
shell = getenv ("SHELL");
if (shell == 0)
shell = default_shell;
if (shell_path != 0)
{
char **new_argv;
int argc;
argc = 1;
while (argv[argc] != 0)
++argc;
argc = 1;
while (argv[argc] != 0)
++argc;
new_argv = (char **) alloca ((1 + argc + 1) * sizeof (char *));
new_argv[0] = shell;
new_argv[1] = program;
while (argc > 0)
{
new_argv[1 + argc] = argv[argc];
--argc;
}
new_argv = (char **) alloca ((1 + argc + 1) * sizeof (char *));
new_argv[0] = shell_path;
new_argv[1] = program;
while (argc > 0)
{
new_argv[1 + argc] = argv[argc];
--argc;
}
execvp (shell, new_argv);
if (errno == ENOENT)
error ("%s: Shell program not found", shell);
else
perror_with_name ("execvp: ", shell);
break;
}
execve (shell_path, new_argv, envp);
perror_with_name ("execve: ", shell_path);
}
}
else
perror_with_name ("execve: ", program);
default:
perror_with_name ("execvp: ", argv[0]);
break;
}
_exit (127);