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/*
** 1998-11-25 - A little module to take care of startup options (arguments to
** main()). This will probably evolve into, or (preferably), get
** replaced by getopt() or something later on.
*/
#include "gentoo.h"
#include <stdlib.h>
#include "options.h"
/* ----------------------------------------------------------------------------------------- */
typedef struct {
char *name;
guint32 flag;
} OptDef;
static OptDef opt_def[] = { {"root-ok", OPTF_ROOT_OK}, {"version", OPTF_VERSION},
{"no-rc", OPTF_NO_RC}, {"no-gtkrc", OPTF_NO_GTKRC} };
/* ----------------------------------------------------------------------------------------- */
/* 1998-11-25 - Remove the <index>'th argument from the <argv>-vector, and also update
** <argc> accordingly.
*/
static void opt_remove(int *argc, char **argv, int index)
{
int i;
if(argc == NULL || argv == NULL || index < 0 || index >= *argc)
return;
for(i = index; argv[i] != NULL; i++)
argv[i] = argv[i + 1];
(*argc)--;
}
/* ----------------------------------------------------------------------------------------- */
/* 1998-11-25 - Extract the known options from the arguments described by <argc> and <argv>.
** Note that this function will *modify* the argument description when known
** options are found, removing them from the vector. I don't *think* that's
** a problem (gtk_init() does the same thing), but since I don't have the
** ANSI C standard handy, I don't really know. All I know is that they're not
** const-declared by main(), and this code doesn't segfault under Linux...
** 1999-01-09 - Modified, now it returns the flags found, so caller can inspect them too.
*/
guint32 opt_extract(int *argc, char **argv)
{
guint i, j, found;
guint32 flags = 0U;
if(argc == NULL || argv == NULL)
return 0U;
for(i = 1; argv[i] != NULL;)
{
found = 0;
if(argv[i][0] == '-' && argv[i][1] == '-' && argv[i][2] != '\0')
{
for(j = 0; j < sizeof opt_def / sizeof opt_def[0]; j++)
{
if(strcmp(argv[i] + 2, opt_def[j].name) == 0)
{
opt_remove(argc, argv, i);
flags |= opt_def[j].flag;
found = 1;
break;
}
}
if(!found)
fprintf(stderr, "%s: Unknown option '%s'\n", argv[0], argv[i]);
}
if(!found)
i++;
}
if(!(flags & OPTF_ROOT_OK) && geteuid() == 0)
{
fprintf(stderr, "%s: To run as root, envoke with the '--root-ok' option\n", argv[0]);
exit(EXIT_FAILURE);
}
if(flags & OPTF_VERSION)
{
fprintf(stdout, "%s\n", VERSION);
exit(EXIT_SUCCESS);
}
return flags;
}
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