diff options
| -rw-r--r-- | Makefile | 1 | ||||
| -rw-r--r-- | libgcompat/unistd.c | 172 |
2 files changed, 173 insertions, 0 deletions
@@ -23,6 +23,7 @@ LIBGCOMPAT_SRC = \ libgcompat/sysctl.c \ libgcompat/syslog.c \ libgcompat/ucontext.c \ + libgcompat/unistd.c \ libgcompat/version.c \ libgcompat/wchar.c LIBGCOMPAT_OBJ = ${LIBGCOMPAT_SRC:.c=.o} diff --git a/libgcompat/unistd.c b/libgcompat/unistd.c new file mode 100644 index 0000000..e19ec8e --- /dev/null +++ b/libgcompat/unistd.c @@ -0,0 +1,172 @@ +#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; +} |