#include <assert.h> /* assert */
#include <limits.h> /* NGROUPS_MAX */
#include <stddef.h> /* NULL, size_t */
#include <unistd.h> /* confstr, getcwd, getgroups, ... */
#include "alias.h" /* alias */
/**
* Get configurable variables, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---confstr-chk-1.html
*/
size_t __confstr_chk(int name, char *buf, size_t len, size_t buflen)
{
assert(buf != NULL ? buflen >= len : len == 0);
return confstr(name, buf, len);
}
/**
* Get the pathname of the current working directory, with buffer overflow
* checking.
*
* LSB 5.0: LSB-Core-generic/baselib---getcwd-chk-1.html
*/
char *__getcwd_chk(char *buf, size_t len, size_t buflen)
{
assert(buf != NULL);
assert(buflen >= len);
return getcwd(buf, len);
}
/**
* Get supplementary group IDs, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---getgroups-chk-1.html
*/
int __getgroups_chk(int gidsetsize, gid_t *grouplist, size_t listlen)
{
assert(grouplist != NULL);
assert(listlen / sizeof(*grouplist) >= (size_t) gidsetsize);
return getgroups(gidsetsize, grouplist);
}
/**
* Get name of current host, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---gethostname-chk-1.html
*/
int __gethostname_chk(char *name, size_t namelen, size_t buflen)
{
assert(name != NULL);
assert(buflen >= namelen);
return gethostname(name, namelen);
}
/**
* Get login name, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---getlogin-r-chk-1.html
*/
int __getlogin_r_chk(char *name, size_t namelen, size_t buflen)
{
assert(name != NULL);
assert(buflen >= namelen);
return getlogin_r(name, namelen);
}
/**
* Get memory page size.
*
* LSB 5.0: LSB-Core-generic/baselib---getpagesize.html
*/
int __getpagesize(void)
{
return getpagesize();
}
/**
* Get the process group ID for a process.
*
* LSB 5.0: LSB-Core-generic/baselib---getpgid-1.html
*/
pid_t __getpgid(pid_t pid)
{
return getpgid(pid);
}
/**
* Read from a file, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---pread-chk-1.html
*/
ssize_t __pread_chk(int fd, void *buf, size_t nbytes, off_t offset,
size_t buflen)
{
assert(buf != NULL);
assert(buflen >= nbytes);
return pread(fd, buf, nbytes, offset);
}
alias(__pread_chk, __pread64_chk);
/**
* Read from a file, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---read-chk-1.html
*/
ssize_t __read_chk(int fd, void *buf, size_t nbytes, size_t buflen)
{
assert(buf != NULL);
assert(buflen >= nbytes);
return read(fd, buf, nbytes);
}
/**
* Read the contents of a symbolic link, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---readlink-chk-1.html
*/
ssize_t __readlink_chk(const char *path, char *buf, size_t len, size_t buflen)
{
assert(buf != NULL);
assert(buflen >= len);
return readlink(path, buf, len);
}
/**
* Get configurable system variables.
*
* LSB 5.0: LSB-Core-generic/baselib---sysconf.html
*/
long __sysconf(int name)
{
return sysconf(name);
}
/**
* Find the pathname of a terminal, with buffer overflow checking.
*
* LSB 5.0: LSB-Core-generic/baselib---ttyname-r-chk-1.html
*/
int __ttyname_r_chk(int fd, char *name, size_t namelen, size_t buflen)
{
assert(name != NULL);
assert(buflen >= namelen);
return ttyname_r(fd, name, namelen);
}
/**
* Test whether a process is in a group.
*/
int group_member(gid_t gid)
{
gid_t groups[NGROUPS_MAX];
int ngroups = getgroups(NGROUPS_MAX, groups);
for (int i = 0; i < ngroups; ++i) {
if (groups[i] == gid) {
return 1;
}
}
return 0;
}
