opt.h
#ifndef OPT_H
#define OPT_H
#include <vstr.h>
#include <getopt.h>
#include <string.h>
#define OPT_SC_EXPORT_CSTR(e, x, mbs, desc) do { \
if (vstr_srch_chr_fwd(x, 1, (x)->len, 0)) \
usage(program_name, EXIT_FAILURE, \
" The value for " desc " must not include a NIL character.\n"); \
if ((mbs) && !(x)->len) \
usage(program_name, EXIT_FAILURE, \
" The value for " desc " can't be set to an empty string.\n"); \
if ((x)->len && !((e) = vstr_export_cstr_ptr(x, 1, (x)->len))) \
errno = ENOMEM, err(EXIT_FAILURE, "options"); \
} while (FALSE)
#ifndef CONF_FULL_STATIC
# include <pwd.h>
# include <grp.h>
# include <sys/types.h>
# define OPT_SC_RESOLVE_UID(opts) do { \
const char *name = NULL; \
struct passwd *pw = NULL; \
\
OPT_SC_EXPORT_CSTR(name, opts->vpriv_uid, FALSE, "privilage uid"); \
\
if (name && (pw = getpwnam(name))) \
(opts)->priv_uid = pw->pw_uid; \
} while (FALSE)
# define OPT_SC_RESOLVE_GID(opts) do { \
const char *name = NULL; \
struct group *gr = NULL; \
\
OPT_SC_EXPORT_CSTR(name, opts->vpriv_gid, FALSE, "privilage gid"); \
\
if (name && (gr = getgrnam(name))) \
(opts)->priv_uid = gr->gr_gid; \
} while (FALSE)
#else
# define OPT_SC_RESOLVE_UID(opts)
# define OPT_SC_RESOLVE_GID(opts)
#endif
#define OPT_TOGGLE_ARG(val) (val = opt_toggle(val, optarg))
#define OPT_NUM_ARG(val, desc, min, max, range_desc) do { \
Vstr_base *opt__parse_num = vstr_dup_cstr_ptr(NULL, optarg); \
unsigned int opt__nflags = VSTR_FLAG02(PARSE_NUM, OVERFLOW, SEP); \
int opt__num = 0; \
\
if (!opt__parse_num) \
errno = ENOMEM, err(EXIT_FAILURE, "parse_num(%s)", desc); \
\
opt__num = vstr_parse_ulong(opt__parse_num, 1, opt__parse_num->len, \
opt__nflags, NULL, NULL); \
if ((opt__num < min) || (opt__num > max)) \
usage(program_name, EXIT_FAILURE, \
" The value for " desc " must be in the range " \
#min " to " #max range_desc ".\n"); \
val = opt__num; \
\
vstr_free_base(opt__parse_num); \
} while (FALSE)
#define OPT_NUM_NR_ARG(val, desc) do { \
Vstr_base *opt__parse_num = vstr_dup_cstr_ptr(NULL, optarg); \
unsigned int opt__nflags = VSTR_FLAG02(PARSE_NUM, OVERFLOW, SEP); \
int opt__num = 0; \
\
if (!opt__parse_num) \
errno = ENOMEM, err(EXIT_FAILURE, "parse_num(%s)", desc); \
\
opt__num = vstr_parse_ulong(opt__parse_num, 1, opt__parse_num->len, \
opt__nflags, NULL, NULL); \
val = opt__num; \
\
vstr_free_base(opt__parse_num); \
} while (FALSE)
#define OPT_VSTR_ARG(val) do { \
if (!vstr_sub_cstr_ptr((val), 1, (val)->len, optarg)) \
errno = ENOMEM, err(EXIT_FAILURE, "parse_string(%s)", optarg); \
} while (FALSE)
extern int opt_toggle(int, const char *);
extern const char *opt_program_name(const char *, const char *);
extern const char *opt_def_toggle(int);
#endif