source: branches/minix3-book/include/minix/callnr.h

#define NCALLS            91    /* number of system calls allowed */

#define EXIT               1 
#define FORK               2 
#define READ               3 
#define WRITE              4 
#define OPEN               5 
#define CLOSE              6 
#define WAIT               7
#define CREAT              8 
#define LINK               9 
#define UNLINK            10 
#define WAITPID           11
#define CHDIR             12 
#define TIME              13
#define MKNOD             14 
#define CHMOD             15 
#define CHOWN             16 
#define BRK               17
#define STAT              18 
#define LSEEK             19
#define GETPID            20
#define MOUNT             21 
#define UMOUNT            22 
#define SETUID            23
#define GETUID            24
#define STIME             25
#define PTRACE            26
#define ALARM             27
#define FSTAT             28 
#define PAUSE             29
#define UTIME             30 
#define ACCESS            33 
#define SYNC              36 
#define KILL              37
#define RENAME            38
#define MKDIR             39
#define RMDIR             40
#define DUP               41 
#define PIPE              42 
#define TIMES             43
#define SETGID            46
#define GETGID            47
#define SIGNAL            48
#define IOCTL             54
#define FCNTL             55
#define EXEC              59
#define UMASK             60 
#define CHROOT            61 
#define SETSID            62
#define GETPGRP           63

/* The following are not system calls, but are processed like them. */
#define UNPAUSE           65    /* to MM or FS: check for EINTR */
#define REVIVE            67    /* to FS: revive a sleeping process */
#define TASK_REPLY        68    /* to FS: reply code from tty task */

/* Posix signal handling. */
#define SIGACTION         71
#define SIGSUSPEND        72
#define SIGPENDING        73
#define SIGPROCMASK       74
#define SIGRETURN         75

#define REBOOT            76    /* to PM */

/* MINIX specific calls, e.g., to support system services. */
#define SVRCTL            77
                                /* unused */
#define GETSYSINFO        79    /* to PM or FS */
#define GETPROCNR         80    /* to PM */
#define DEVCTL            81    /* to FS */
#define FSTATFS           82    /* to FS */
#define ALLOCMEM          83    /* to PM */
#define FREEMEM           84    /* to PM */
#define SELECT            85    /* to FS */
#define FCHDIR            86    /* to FS */
#define FSYNC             87    /* to FS */
#define GETPRIORITY       88    /* to PM */
#define SETPRIORITY       89    /* to PM */
#define GETTIMEOFDAY      90    /* to PM */