Header | Standards | Implementations | Description | |||
---|---|---|---|---|---|---|
ANSI C | POSIX.1 | XPG3 | SVR4 | 4.3+BSD | ||
<assert.h> | x | - | - | x | x | verify program assertion |
<cpio.h> | - | x | - | x | - | cpio archive values |
<ctype.h> | x | - | - | x | x | character types |
<dirent.h> | - | x | x | x | x | directory entries |
<errno.h> | x | - | - | x | x | error codes |
<fcntl.h> | - | x | x | x | x | file control |
<float.h> | x | - | - | x | x | floating point constants |
<ftw.h> | - | - | x | x | - | file tree walking |
<grp.h> | - | x | x | x | x | group file |
<langinfo.h> | - | - | x | x | - | language information constants |
<limits.h> | x | - | - | x | x | implementation constants |
<locale.h> | x | - | - | x | x | locale categories |
<math.h> | x | - | - | x | x | mathematical constants |
<nl_types.h> | - | - | x | x | - | message catalogs |
<pwd.h> | - | x | x | x | x | password file |
<regex.h> | - | - | x | x | x | regular expressions |
<search.h> | - | - | x | x | - | search tables |
<setjmp.h> | x | - | - | x | x | nonlocal goto |
<signal.h> | x | - | - | x | x | signals |
<stdarg.h> | x | - | - | x | x | variable argument lists |
<stddef.h> | x | - | - | x | x | standard definition |
<stdio.h> | x | - | - | x | x | standard I/O library |
<stdlib.h> | x | - | - | x | x | utility functions |
<string.h> | x | - | - | x | x | string operations |
<tar.h> | - | - | x | x | - | tar archive values |
<termios.h> | - | x | x | x | x | terminal I/O |
<time.h> | x | - | - | x | x | time and date |
<ulimit.h> | - | - | x | x | - | user limits |
<unistd.h> | - | x | x | x | x | symbolic constants |
<utime.h> | - | x | x | x | x | file times |
<sys/ipc.h> | - | - | x | x | x | IPC |
<sys/msg.h> | - | - | x | x | - | message queues |
<sys/sem.h> | - | - | x | x | - | semaphores |
<sys/shm.h> | - | - | x | x | x | shared memory |
<sys/stat.h> | - | x | x | x | x | file status |
<sys/times.h> | - | x | x | x | x | process times |
<sys/types.h> | - | x | x | x | x | primitive system data types |
<sys/utsname.h> | - | x | x | x | x | system name |
<sys/wait.h> | - | x | x | x | x | process control |