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- /**
- * Actually start a process. All of the arguments given to this
- * function are strings that are used for the "argv" array. However,
- * if those strings contain spaces, the given argument is split into
- * multiple argv entries without spaces. Similarly, if an argument is
- * the empty string, it is skipped. This function has the inherent
- * limitation that it does NOT allow passing command line arguments
- * with spaces to the new process.
- *
- * @param lsocks array of listen sockets to dup starting at fd3 (systemd-style), or NULL
- * @param first_arg first argument for argv (may be an empty string)
- * @param ... more arguments, NULL terminated
- * @return PID of the started process, -1 on error
- */
- static struct GNUNET_OS_Process *
- do_start_process (const int *lsocks,
- const char *first_arg, ...)
- {
- va_list ap;
- char **argv;
- unsigned int argv_size;
- const char *arg;
- const char *rpos;
- char *pos;
- char *cp;
- const char *last;
- struct GNUNET_OS_Process *proc;
- argv_size = 1;
- va_start (ap, first_arg);
- arg = first_arg;
- last = NULL;
- do
- {
- rpos = arg;
- while ('\0' != *rpos)
- {
- if (' ' == *rpos)
- {
- if (last != NULL)
- argv_size++;
- last = NULL;
- while (' ' == *rpos)
- rpos++;
- }
- if ( (last == NULL) && (*rpos != '\0') )
- last = rpos;
- if (*rpos != '\0')
- rpos++;
- }
- if (last != NULL)
- argv_size++;
- }
- while (NULL != (arg = (va_arg (ap, const char*))));
- va_end (ap);
- argv = GNUNET_malloc (argv_size * sizeof (char *));
- argv_size = 0;
- va_start (ap, first_arg);
- arg = first_arg;
- last = NULL;
- do
- {
- cp = GNUNET_strdup (arg);
- pos = cp;
- while ('\0' != *pos)
- {
- if (' ' == *pos)
- {
- *pos = '\0';
- if (last != NULL)
- argv[argv_size++] = GNUNET_strdup (last);
- last = NULL;
- pos++;
- while (' ' == *pos)
- pos++;
- }
- if ( (last == NULL) && (*pos != '\0') )
- last = pos;
- if (*pos != '\0')
- pos++;
- }
- if (last != NULL)
- argv[argv_size++] = GNUNET_strdup (last);
- last = NULL;
- GNUNET_free (cp);
- }
- while (NULL != (arg = (va_arg (ap, const char*))));
- va_end (ap);
- argv[argv_size] = NULL;
- proc = GNUNET_OS_start_process_v (lsocks, argv[0], argv);
- while (argv_size > 0)
- GNUNET_free (argv[--argv_size]);
- GNUNET_free (argv);
- return proc;
- }
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