+/*
+ * Copyright (C) 2003-2008 Andre Noll <maan@systemlinux.org>
+ *
+ * Licensed under the GPL v2. For licencing details see COPYING.
+ */
+
/** \file exec.c Helper functions for spawning new processes. */
#include <string.h>
#include "gcc-compat.h"
+#include "log.h"
#include "error.h"
#include "string.h"
goto err_out;
if (!fds[0] || !fds[1] || !fds[2]) {
ret = -E_NULL_OPEN;
- null = open("/dev/null", O_RDONLY);
+ null = open("/dev/null", O_RDWR);
if (null < 0)
goto err_out;
}
close(null);
return 1;
err_out:
- make_err_msg("failed to exec %s", file);
+ DSS_ERROR_LOG("failed to exec %s\n", file);
if (err[0] >= 0)
close(err[0]);
if (err[1] >= 0)
close(null);
return ret;
}
+
+
+/**
+ * Exec the given command.
+ *
+ * \param pid Will hold the pid of the created process upon return.
+ * \param cmdline Holds the command and its arguments, seperated by spaces.
+ * \param fds A pointer to a value-result array.
+ *
+ * This function uses fork/exec to create a new process. \a fds must be a
+ * pointer to three integers, corresponding to stdin, stdout and stderr
+ * respectively. It specifies how to deal with fd 0, 1, 2 in the child. The
+ * contents of \a fds are interpreted as follows:
+ *
+ * - fd[i] < 0: leave fd \a i alone.
+ * - fd[i] = 0: dup fd \a i to \p /dev/null.
+ * - fd[i] > 0: create a pipe and dup i to one end of that pipe.
+ * Upon return, fd[i] contains the file descriptor of the pipe.
+ *
+ * In any case, all unneeded filedescriptors are closed.
+ *
+ * \return Standard.
+ */
+int dss_exec_cmdline_pid(pid_t *pid, const char *cmdline, int *fds)
+{
+ int argc, ret;
+ char **argv;
+ char *tmp = dss_strdup(cmdline);
+
+ if (!tmp)
+ exit(EXIT_FAILURE);
+ argc = split_args(tmp, &argv, " \t");
+ ret = dss_exec(pid, argv[0], argv, fds);
+ free(argv);
+ free(tmp);
+ return ret;
+}
+
+