ndd (06/14/82)
There is apparently a difference between the vanilla v7 file /usr/include/sys/user.h and the one used here at duke to compile the process display program that I posted here week. Here is the local version. /* * The user structure. * One allocated per process. * Contains all per process data * that doesn't need to be referenced * while the process is swapped. * The user block is USIZE*64 bytes * long; resides at virtual kernel * loc 140000; contains the system * stack per user; is cross referenced * with the proc structure for the * same process. */ #define EXCLOSE 01 #define SHSIZ 16 struct user { label_t u_rsav; /* save info when exchanging stacks */ int u_fper; /* FP error register */ int u_fpsaved; /* FP regs saved for this proc */ struct { int u_fpsr; /* FP status register */ double u_fpregs[6]; /* FP registers */ } u_fps; char u_segflg; /* IO flag: 0:user D; 1:system; 2:user I */ char u_error; /* return error code */ short u_uid; /* effective user id */ short u_gid; /* effective group id */ short u_ruid; /* real user id */ short u_rgid; /* real group id */ struct proc *u_procp; /* pointer to proc structure */ int *u_ap; /* pointer to arglist */ union { /* syscall return values */ struct { int r_val1; int r_val2; } V; off_t r_off; time_t r_time; } u_r; caddr_t u_base; /* base address for IO */ unsigned int u_count; /* bytes remaining for IO */ off_t u_offset; /* offset in file for IO */ struct inode *u_cdir; /* pointer to inode of current directory */ struct inode *u_rdir; /* root directory of current process */ char u_dbuf[DIRSIZ]; /* current pathname component */ caddr_t u_dirp; /* pathname pointer */ struct direct u_dent; /* current directory entry */ struct inode *u_pdir; /* inode of parent directory of dirp */ int u_uisa[16]; /* prototype of segmentation addresses */ int u_uisd[16]; /* prototype of segmentation descriptors */ struct file *u_ofile[NOFILE]; /* pointers to file structures of open files */ char u_pofile[NOFILE]; /* per-process flags of open files */ int u_arg[5]; /* arguments to current system call */ unsigned u_tsize; /* text size (clicks) */ unsigned u_dsize; /* data size (clicks) */ unsigned u_ssize; /* stack size (clicks) */ label_t u_qsav; /* label variable for quits and interrupts */ label_t u_ssav; /* label variable for swapping */ int u_signal[NSIG]; /* disposition of signals */ time_t u_utime; /* this process user time */ time_t u_stime; /* this process system time */ time_t u_cutime; /* sum of childs' utimes */ time_t u_cstime; /* sum of childs' stimes */ int *u_ar0; /* address of users saved R0 */ struct { /* profile arguments */ short *pr_base; /* buffer base */ unsigned pr_size; /* buffer size */ unsigned pr_off; /* pc offset */ unsigned pr_scale; /* pc scaling */ } u_prof; char u_intflg; /* catch intr from sys */ char u_sep; /* flag for I and D separation */ struct tty *u_ttyp; /* controlling tty pointer */ dev_t u_ttyd; /* controlling tty dev */ union { char S[SHSIZ]; struct { /* header of executable file */ int ux_mag; /* magic number */ unsigned ux_tsize; /* text size */ unsigned ux_dsize; /* data size */ unsigned ux_bsize; /* bss size */ unsigned ux_ssize; /* symbol table size */ unsigned ux_entloc; /* entry location */ unsigned ux_unused; unsigned ux_relflg; } A; } u_exdata; char u_comm[DIRSIZ]; time_t u_start; char u_acflag; short u_fpflag; /* unused now, will be later */ short u_cmask; /* mask for file creation */ #ifdef PMASK short u_pmask; /* permission bits. */ #endif int u_stack[1]; /* kernel stack per user * extends from u + USIZE*64 * backward not to reach here */ }; extern struct user u; /* u_error codes */ #define EPERM 1 #define ENOENT 2 #define ESRCH 3 #define EINTR 4 #define EIO 5 #define ENXIO 6 #define E2BIG 7 #define ENOEXEC 8 #define EBADF 9 #define ECHILD 10 #define EAGAIN 11 #define ENOMEM 12 #define EACCES 13 #define EFAULT 14 #define ENOTBLK 15 #define EBUSY 16 #define EEXIST 17 #define EXDEV 18 #define ENODEV 19 #define ENOTDIR 20 #define EISDIR 21 #define EINVAL 22 #define ENFILE 23 #define EMFILE 24 #define ENOTTY 25 #define ETXTBSY 26 #define EFBIG 27 #define ENOSPC 28 #define ESPIPE 29 #define EROFS 30 #define EMLINK 31 #define EPIPE 32 #define EDOM 33 #define ERANGE 34