Viewing file:  pr90037.c (3.36 KB) -rw-r--r--
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/* { dg-do compile } */
/* { dg-options "-O2 -Wnull-dereference" } */
typedef __SIZE_TYPE__ size_t;
typedef unsigned long int uintmax_t;
struct group
{
char *gr_name;
char *gr_passwd;
unsigned gr_gid;
char **gr_mem;
};
struct passwd
{
char *pw_name;
char *pw_passwd;
unsigned pw_uid;
unsigned pw_gid;
char *pw_gecos;
char *pw_dir;
char *pw_shell;
};
extern struct group *getgrnam (const char *);
extern struct group *getgrgid (unsigned);
extern void endgrent (void);
extern struct passwd *getpwnam (const char *);
extern void endpwent (void);
extern unsigned long int strtoul (const char *__restrict,
char **__restrict, int);
char const *
parse_with_separator (char const *spec, char const *separator,
unsigned *uid, unsigned *gid,
char **username, char **groupname)
{
static const char *E_invalid_user = "invalid user";
static const char *E_invalid_group = "invalid group";
static const char *E_bad_spec = "invalid spec";
const char *error_msg;
struct passwd *pwd;
struct group *grp;
char *u;
char const *g;
char *gname = 0;
unsigned unum = *uid;
unsigned gnum = gid ? *gid : (unsigned)-1;
error_msg = 0;
if (username)
*username = 0;
if (groupname)
*groupname = 0;
u = 0;
if (separator == 0)
{
if (*spec)
u = __builtin_strdup (spec);
}
else
{
size_t ulen = separator - spec;
if (ulen != 0)
{
u = __builtin_malloc (ulen + 1);
__builtin_memcpy (u, spec, ulen + 1);
u[ulen] = '\0';
}
}
g = (separator == 0 || *(separator + 1) == '\0' ? 0 : separator + 1);
if (u != 0)
{
pwd = (*u == '+' ? 0 : getpwnam (u));
if (pwd == 0)
{
_Bool use_login_group = (separator != 0 && g == 0);
if (use_login_group)
{
error_msg = E_bad_spec;
}
else
{
unsigned long int tmp;
tmp = strtoul (u, 0, 10);
if (tmp <= (1ul << 31) && (unsigned) tmp != (unsigned) -1)
unum = tmp;
else
error_msg = E_invalid_user;
}
}
else
{
unum = pwd->pw_uid;
if (g == 0 && separator != 0)
{
char buf[128];
gnum = pwd->pw_gid;
grp = getgrgid (gnum);
gname = buf;
if (grp)
gname = __builtin_strdup (grp->gr_name);
else
__builtin_snprintf (buf, sizeof(buf), "%ju", (uintmax_t)gnum);
endgrent ();
}
}
endpwent ();
}
if (g != 0 && error_msg == 0)
{
grp = (*g == '+' ? 0 : getgrnam (g));
if (grp == 0)
{
unsigned long int tmp = strtoul (g, 0, 10);
if (tmp <= (1ul << 31) && (unsigned) tmp != (unsigned) -1)
gnum = tmp;
else
error_msg = E_invalid_group;
}
else
gnum = grp->gr_gid;
endgrent ();
gname = __builtin_strdup (g);
}
if (error_msg == 0)
{
*uid = unum;
if (gid)
*gid = gnum;
if (username)
{
*username = u;
u = 0;
}
if (groupname)
{
*groupname = gname;
gname = 0;
}
}
__builtin_free (u);
__builtin_free (gname);
return error_msg ? error_msg : 0;
}
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