/* top.h - Header file: show Linux processes */ /* * Copyright (c) 2002, by: James C. Warner * All rights reserved. 8921 Hilloway Road * Eden Prairie, Minnesota 55347 USA * * * This file may be used subject to the terms and conditions of the * GNU Library General Public License Version 2, or any later version * at your option, as published by the Free Software Foundation. * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Library General Public License for more details. */ /* For their contributions to this program, the author wishes to thank: * Craig Small, * Albert D. Cahalan, */ #ifndef _Itop #define _Itop /* Determines for whom we're destined ------------------------------ */ //#define UGH_ITS_4_RH /* use the redhat libproc conventions */ /* Defines intended to be experimented with ------------------------ */ //#define CASEUP_HEXES /* show any hex values in upper case */ //#define CASEUP_SCALE /* show scaled times & memory upper case */ //#define CASEUP_SUMMK /* show memory summary kilobytes with 'K' */ //#define QUIT_NORMALQ /* use 'q' to quit, not new default 'Q' */ //#define SORT_SUPRESS /* *attempt* to reduce qsort overhead */ //#define USE_LIB_STA3 /* use lib status (3 ch) vs. proc_t (1 ch) */ //#define WARN_NOT_SMP /* restrict '1' & 'I' commands to true smp */ /* Development/Debugging defines ----------------------------------- */ //#define ATEOJ_REPORT /* report a bunch of stuff, at end-of-job */ //#define PRETEND4CPUS /* pretend we're smp with 4 ticsers (sic) */ //#define PRETENDNOCAP /* use a terminal without essential caps */ /*###### Some Miscellaneous constants ##################################*/ /* The default delay twix updates */ #define DEF_DELAY 3.0 /* The length of time a 'message' is displayed */ #define MSG_SLEEP 2 /* The default value for the 'k' (kill) request */ #define DEF_SIGNAL SIGTERM /* Specific process id monitoring support (command line only) */ #define MONPIDMAX 20 /* Miscellaneous buffer sizes with liberal values -- mostly just to pinpoint source code usage/dependancies */ #define PFLAGSSIZ 32 #define CAPBUFSIZ 32 #define CLRBUFSIZ 64 #define GETBUFSIZ 32 #define TNYBUFSIZ 32 #define SMLBUFSIZ 256 #define MEDBUFSIZ 512 #define OURPATHSZ 1024 #define BIGBUFSIZ 2048 #define RCFBUFSIZ SMLBUFSIZ #define USRNAMSIZ GETBUFSIZ #define COLBUFSIZ SMLBUFSIZ + CLRBUFSIZ #define ROWBUFSIZ MEDBUFSIZ + CLRBUFSIZ /*###### Some Miscellaneous Macro definitions ##########################*/ /* Used as return arguments to achieve normal/reversed sorts in the sort callbacks */ #define SORT_lt ( Frame_srtflg ? 1 : -1 ) #define SORT_gt ( Frame_srtflg ? -1 : 1 ) /* Convert some proc stuff into vaules we can actually use */ #define BYTES_2K(n) (unsigned)( (n) >> 10 ) #define PAGES_2B(n) (unsigned)( (n) * Page_size ) #define PAGES_2K(n) BYTES_2K(PAGES_2B(n)) #define PAGE_CNT(n) (unsigned)( (n) / Page_size ) /* Yield table size as 'int' */ #define MAXtbl(t) ( (int)(sizeof(t)/sizeof(t[0])) ) /*###### Special Macros (debug and/or informative) #####################*/ /* Orderly end, with any sort of message - see fmtmk */ #define debug_END(s) { \ static void std_err (const char *); \ fputs(Cap_clr_scr, stdout); \ std_err(s); \ } /* A poor man's breakpoint, if he's too lazy to learn gdb */ #define its_YOUR_fault { *((char *)0) = '!'; } /*###### Some Typedef's and Enum's #####################################*/ /* This typedef attempts to ensure consistent 'ticks' handling. */ typedef unsigned long TICS_t; /* This structure consolidates the information that's used in a variety of display roles. */ typedef struct { const char *head; /* name for column headings + toggle/reorder fields */ const char *fmts; /* sprintf format string for field display */ const int width; /* field width, if applicable */ const int scale; /* scale_num type, if applicable */ const int sort; /* sort type, if applicable (used soley by mkcol) */ const char *desc; /* description for toggle/reorder fields */ } FTAB_t; /* This structure stores one piece of critical 'history' information from one frame to the next -- we don't calc and save data that goes unused like the old top! */ typedef struct { int pid; TICS_t tics; } HIST_t; /* This structure stores the prior frame's tics used in history calculations. It exists primarily for SMP support but serves all environments. There will always Cpu_tot + 1 allocated -- see frame_states for details. */ typedef struct { TICS_t u, /* ticks count as represented in /proc/stat */ n, /* (not in the order of our display) */ s, i; } CPUS_t; /* Sorted columns support. */ typedef int (*QSORT_t)(const void *, const void *); enum sort { S_CMD = 'C', S_MEM = 'M', S_TME = 'T', S_PID = 'P', S_TTY = 'Y', S_CPU = 'U', S_USR = 'E' }; /* The scaling 'type' used with scale_num() -- this is how the passed number is interpreted should scaling be necessary */ enum scale_num { SK_no, SK_Kb, SK_Mb, SK_Gb }; /* Flags for each possible field. At the moment 32 are supported [ see PFLAGSSIZ ] */ enum pflag { P_PID, P_PPID, P_UID, P_USER, P_GROUP, P_TTY, P_PR, P_NI, P_NCPU, P_CPU, P_TIME, P_TIME2, P_MEM, P_VIRT, P_SWAP, P_RES, P_CODE, P_DATA, P_SHR, P_FAULT, P_DIRTY, P_STA, P_CMD, P_WCHAN, P_FLAGS }; /* ////////////////////////////////////////////////////////////// */ /* Special Section: multiple windows/field groups ---------------*/ /* (kind of a header within a header: constants, macros & types) */ #define GROUPSMAX 4 /* the max number of simultaneous windows */ #define WINNAMSIZ 4 /* max size of a window's basic name */ #define GRPNAMSIZ 6 /* window's name + number as in: '#:...' */ #define CAPTABMAX 9 /* a window's captab used by show_special */ #define Flags_TOG 1 /* these are used to direct wins_reflag */ #define Flags_SET 2 #define Flags_OFF 3 /* The Persistent 'Mode' flags! All of these are preserved in the rc file, as a single integer. Thus, once personalized, this top will stay personalized across restarts (not like the old top, who only remembered fields)! Note: the letter shown is the corresponding 'command' toggle */ /* 'View_' flags affect the summary information, taken from 'Curwin' */ #define View_CPUSUM 0x8000 /* '1' - show combined cpu stats (vs. each) */ #define View_LOADAV 0x4000 /* 'l' - display load avg and uptime summary */ #define View_STATES 0x2000 /* 't' - display task/cpu(s) states summary */ #define View_MEMORY 0x1000 /* 'm' - display memory summary */ /* 'Show_' & 'Qsrt_' flags are for task display in a visible window */ #define Show_COLORS 0x0800 /* 'z' - show in color (vs. mono) */ #define Show_HIBOLD 0x0400 /* 'b' - rows and/or cols bold (vs. reverse) */ #define Show_HICOLS 0x0200 /* 'x' - show sort column highlighted */ #define Show_HIROWS 0x0100 /* 'y' - show running tasks highlighted */ #define Show_CMDLIN 0x0080 /* 'c' - show cmdline vs. name */ #define Show_CTIMES 0x0040 /* 'S' - show times as cumulative */ #define Show_IDLEPS 0x0020 /* 'i' - show idle processes (all tasks) */ #define Qsrt_NORMAL 0x0010 /* 'R' - reversed column sort (high to low) */ /* these flag(s) have no command as such - they're for internal use */ #define VISIBLE_tsk 0x0008 /* tasks are showable in 'Show_altscr' mode */ #define NEWFRAM_cwo 0x0004 /* new frame (if anyone cares) - in Curwin */ #define EQUWINS_cwo 0x0002 /* rebalance tasks next frame (off 'i'/ 'n') */ /* ...set in Curwin, but impacts all windows */ #define flag_unused 0x0001 /* ----------------------- future use, maybe */ /* Current-window-only flags -- always turned off at end-of-window! */ #define FLGSOFF_cwo EQUWINS_cwo | NEWFRAM_cwo /* Default flags if there's no rcfile to provide user customizations */ #define DEF_WINFLGS ( View_LOADAV | View_STATES | View_CPUSUM | View_MEMORY | \ Show_HIBOLD | Show_HIROWS | Show_IDLEPS | Qsrt_NORMAL | VISIBLE_tsk ) /* Used to test/manipulate the window flags */ #define CHKw(q,f) (int)(q->winflags & (f)) #define TOGw(q,f) q->winflags ^= (f) #define SETw(q,f) q->winflags |= (f) #define OFFw(q,f) q->winflags &= ~(f) #define VIZCHKc (!Show_altscr || Curwin->winflags & VISIBLE_tsk) \ ? 1 : win_warn() #define VIZTOGc(f) (!Show_altscr || Curwin->winflags & VISIBLE_tsk) \ ? TOGw(Curwin, f) : win_warn() /* This structure stores configurable information for each window. By expending a little effort in its creation and user requested maintainence, the only real additional per frame cost of having windows is a *potential* extra sort -- but that's just on ptrs! */ typedef struct win { struct win *next, /* next window in window stack */ *prev; /* prior window in window stack */ int winnum, /* window's num (array pos + 1) */ winlines; /* task window's rows (volatile) */ int winflags; /* 'view', 'show' and 'sort' mode flags */ char grpname [GRPNAMSIZ], /* window number:name, printable */ winname [WINNAMSIZ], /* window name, user changeable */ fieldscur [PFLAGSSIZ], /* fields displayed and ordered */ columnhdr [SMLBUFSIZ], /* column headings for procflags */ colusrnam [USRNAMSIZ]; /* if selected by the 'u' command */ unsigned procflags [PFLAGSSIZ]; /* fieldscur subset as: int/enum */ int maxpflgs, /* number of procflags (upcase fieldscur) */ maxtasks, /* user requested maximum, 0 equals all */ maxcmdln, /* max length of a process' command line */ sorttype; /* the last chosen sort field (as enum) */ QSORT_t sortfunc; /* sort function for this window's tasks */ int summclr, /* color num used in summ info */ msgsclr, /* " in msgs/pmts */ headclr, /* " in cols head */ taskclr; /* " in task display */ char capclr_sum [CLRBUFSIZ], /* terminfo strings built from */ capclr_msg [CLRBUFSIZ], /* above clrs (& rebuilt too), */ capclr_pmt [CLRBUFSIZ], /* but NO recurring costs !!! */ capclr_hdr [CLRBUFSIZ], /* note: sum, msg and pmt strs */ capclr_rowhigh [CLRBUFSIZ], /* are only used when this */ capclr_rownorm [CLRBUFSIZ]; /* window is the 'Curwin'! */ int len_rownorm, /* lengths of the corresponding terminfo */ len_rowhigh; /* strings to save mkcol() a strlen call */ char *captab [CAPTABMAX]; /* captab needed by show_special */ } WIN_t; /* ////////////////////////////////////////////////////////////// */ /*###### Display Support *Data* ########################################*/ /* An rcfile 'footprint' used to invalidate existing */ #define RCF_FILEID 'd' /* The default fields displayed and their order, if nothing is specified by the loser, oops user */ #define DEF_FIELDS "AbcDefGHiJkLMNOPqrstuVWxy" /* Pre-configured grouped fields */ #define JOB_FIELDS "ABWdefikqrstuxyLJMGHVNOPC" #define MEM_FIELDS "AMNOPQRSTUWbcdefiklxyVGHJ" #define USR_FIELDS "CDEFABWghiknopqrstuxyLJMV" /* These are the possible fscanf formats used in /proc/stat reads during history processing. */ #define CPU_FMTS_MULTI "cpu%*d %lu %lu %lu %lu\n" #define CPU_FMTS_JUST1 "cpu %lu %lu %lu %lu\n" /* Summary Lines specially formatted string(s) -- see 'show_special' for syntax details + other cautions. */ #define LOADAV_line "%s -%s\n" #define LOADAV_line_alt "%s\06 -%s\n" #define STATES_line1 "Tasks:\03" \ " %3u \02total,\03 %3u \02running,\03 %3u \02sleeping,\03" \ " %3u \02stopped,\03 %3u \02zombie\03\n" #define STATES_line2 "%s\03" \ " %#5.1f%% \02user,\03 %#5.1f%% \02system,\03" \ " %#5.1f%% \02nice,\03 %#5.1f%% \02idle\03\n" #ifdef CASEUP_SUMMK #define MEMORY_line1 "Mem: \03" \ " %8uK \02total,\03 %8uK \02used,\03" \ " %8uK \02free,\03 %8uK \02buffers\03\n" #define MEMORY_line2 "Swap:\03" \ " %8uK \02total,\03 %8uK \02used,\03" \ " %8uK \02free,\03 %8uK \02cached\03\n" #else #define MEMORY_line1 "Mem: \03" \ " %8uk \02total,\03 %8uk \02used,\03" \ " %8uk \02free,\03 %8uk \02buffers\03\n" #define MEMORY_line2 "Swap:\03" \ " %8uk \02total,\03 %8uk \02used,\03" \ " %8uk \02free,\03 %8uk \02cached\03\n" #endif /* Colors Help specially formatted string(s) -- see 'show_special' for syntax details + other cautions. */ #define COLOR_help \ "%s%s's \01Help for color mapping\02 - %s\n" \ "current window: \01%s\06\n" \ "\n" \ " color -\03 04:25:44 up 8 days, 50 min, 7 users, load average:\n" \ " Tasks:\03 64 \02total,\03 2 \02running,\03 62 \02sleeping,\03 0 \02stopped,\03\n" \ " State cpu0 :\03 76.5%% \02user,\03 11.2%% \02system,\03 0.0%% \02nice,\03\n" \ " \01 Nasty Message! \04 -or- \01Input Prompt\05\n" \ " \01 PID TTY PR NI %%CPU TIME+ VIRT SWAP STA Command \06\n" \ " 17284 \10pts/2 \07 8 0 0.0 0:00.75 1380 0 S /bin/bash \10\n" \ " \01 8601 pts/1 7 -10 0.4 0:00.03 916 0 R < color -b \07\n" \ " 11005 \10? \07 9 0 0.0 0:02.50 2852 1008 S amor -ses \10\n" \ " available toggles: \01b\02 =bold/reverse (\01%s\02), \01z\02 =color/mono (\01%s\02)\n" \ "\n" \ "Select \01target\02 as upper case letter:\n" \ " S\02 = Summary Data,\01 M\02 = Messages/Prompts,\n" \ " H\02 = Column Heads,\01 T\02 = Task Information\n" \ "Select \01color\02 as number:\n" \ " 0\02 = black,\01 1\02 = red, \01 2\02 = green,\01 3\02 = yellow,\n" \ " 4\02 = blue, \01 5\02 = magenta,\01 6\02 = cyan, \01 7\02 = white\n" \ "\n" \ "Selected: \01target\02 \01 %c \04; \01color\02 \01 %d \04\n" \ " press 'q' to abort changes to window '\01%s\02'\n" \ " press 'a' or 'w' to commit & change another, to commit and end " \ "" /* Keyboard Help specially formatted string(s) -- see 'show_special' for syntax details + other cautions. */ #ifdef QUIT_NORMALQ #define HELP_QUITkey " q " #else #define HELP_QUITkey " Q " #endif #define KEYS_help \ "%s's - \01Help for Interactive Commands\02 - %s\n" \ "Window %s\06: \01Cumulative mode \03%s\02. \01System\06: \01Delay time \03%.1f secs\02; \01Secure mode \03%s\02.\n" \ " sp or ^L Redraw screen\n" \ " o Rearrange current window's fields\n" \ " f Add and remove current window's fields\n" \ " Z Change color mappings for any window\05\n" \ "\n" \ "(7 letters) . Sort: \01C\02) cmd; \01M\02) mem; \01P\02) pid; \01T\02) time; \01U\02) cpu; \01Y\02) tty; \01E\02) user\n" \ " R . Toggle normal/reverse sort for any of above\n" \ " l,t,m Toggle summary: \01l\02) load avg; \01t\02) task/cpu stats; \01m\02) mem info\n" \ " c,i,S . Toggle: \01c\02) cmd name/line; \01i\02) idle tasks; \01S\02) cumulative time\n" \ " x,y\05 . Toggle highlights: \01x\02) sort field; \01y\02) running tasks\n" \ " z,b\05 . Toggle: \01z\02) color/mono; \01b\02) bold/reverse, only if 'x' or 'y'\n" \ " 1,I Toggle SMP view:\01 1\02) single/separate states; \01I\02) Irix/Solaris mode\n" \ "%s" \ " u . Show specific user only\n" \ " # or n . Set maximum tasks displayed\n" \ " W Write configuration file\n" \ HELP_QUITkey "Quit\n" \ " ( commands shown with '.' require a \01visible\02 task display \01window\02 ) \n" \ "Press '\01h\02' or '\01?\02' for help with \01Windows\02,\n" \ "any other key to continue " \ "" /* This guy goes above the 'u' help text (maybe) */ #define KEYS_help_unsecured \ " k Kill a task\n" \ " r Renice a task\n" \ " s or d Set update interval\n" \ "" /* Fields Reorder/Toggle specially formatted string(s) -- see 'show_special' for syntax details + other cautions note: the leading newline below serves really dumb terminals; if there's no 'cursor_home', the screen will be a mess but this part will still be functional. */ #define FIELDS_current \ "\n%s%s's\01 Current Fields\02: \01 %s \04 for window \01%s\06\n%s " \ "" /* Some extra explanatory text which accompanies the Fields display. note: the newlines cannot actually be used, they just serve as substring delimiters for the 'display_fields' routine. */ #define FIELDS_xtra \ "Flags field:\n" \ " 0x00000001 PF_ALIGNWARN\n" \ " 0x00000002 PF_STARTING\n" \ " 0x00000004 PF_EXITING\n" \ " 0x00000040 PF_FORKNOEXEC\n" \ " 0x00000100 PF_SUPERPRIV\n" \ " 0x00000200 PF_DUMPCORE\n" \ " 0x00000400 PF_SIGNALED\n" \ " 0x00000800 PF_MEMALLOC\n" \ " 0x00040000 PF_KERNTHREAD (2.5)\n" \ " 0x00100000 PF_USEDFPU (thru 2.4)\n" \ " 0x00400000 PF_ATOMICALLOC\n" \ "\n" \ "Memory notes:\n" \ " VIRT = SWAP + RES\n" \ " RES = CODE + DATA\n" \ "" /* Windows/Field Group Help specially formatted string(s) -- see 'show_special' for syntax details + other cautions. */ #define WINDOWS_help \ "%s's \01Help for Windows and Field Groups\02 - \"Current\" = \01 %s \06\n" \ "\n" \ ". Use multiple \01windows\02, each with separate config opts (color,fields,sort,etc)\n" \ ". The '\01Current\05' window controls the \01Summary Area\02 and responds to your \01Commands\02\n" \ " . that window's \01task display\02 can be turned \01Off\02 & \01On\02, growing/shrinking others\n" \ " . with \01NO\02 task display, some commands will be \01disabled\02 ('i','R','n','c', etc)\n" \ " until a \01different window\02 has been activated, making it the '\01Current\05' window\n" \ ". You \01change\02 a '\01Current\05' window by: \01 1\02) cycling forward/backward; \01 2\02) choosing\n" \ " a specific window with 'O' or 'F'; or \01 3\02) exiting the color mapping screen\n" \ ". Commands \01available anytime\02 -------------\n" \ " \01A\02 . Alternate display mode toggle, show \01Single\02 / \01Multiple\02 windows\n" \ " O or F . Choose another field group and make it '\01Current\05', or change now\n" \ " by selecting a number: \01 1\02 :%s; \01 2\02 :%s; \01 3\02 :%s; \01 4\02 :%s\n" \ ". Commands \01requiring\02 '\01A\02' mode -----------\n" \ " g . Change the '\01Current\05' window name (field group)\n" \ " \01*\04 a , w . Cycle through all four windows: \01a\02 Forward; \01w\02 Backward\n" \ " \01*\04 - , _ . Show/Hide: '\01-\05' \01Current\02 window; '\01_\05' all \01Visible\02/\01Invisible\02\n" \ " The screen will be divided evenly between task displays. But you can make\n" \ " some \01larger\02 or \01smaller\02, using '\01n\02' and '\01i\02' commands. Then later you could:\n" \ " \01*\04 = , + . Rebalance tasks: '\01=\05' \01Current\02 window; '\01+\05' \01Every\02 window\n" \ " (this also forces the \01current\02 or \01every\02 window to become visible)\n" \ "\n" \ "In '\01A\02' mode, '\01*\04' keys are your \01essential\02 commands. Please try the '\01a\02' and '\01w\02'\n" \ "commands plus the 'O'/'F' sub-commands NOW. Press to make 'Current' " \ "" /*###### Some Prototypes (ha!) #########################################*/ /* None of these are necessary when the source file is properly * organized -- they're here for documentation purposes ! * Note also that functions are alphabetical within a group to aid * source code navigation, which often influences choice of identifers. */ /*------ Sort callbacks ------------------------------------------------*/ //atic int pid_sort (proc_t **P, proc_t **Q); //atic int sort_cmd (proc_t **P, proc_t **Q); //atic int sort_cpu (proc_t **P, proc_t **Q); //atic int sort_mem (proc_t **P, proc_t **Q); //atic int sort_tme (proc_t **P, proc_t **Q); //atic int sort_tty (proc_t **P, proc_t **Q); //atic int sort_usr (proc_t **P, proc_t **Q); /*------ Tiny useful routine(s) ----------------------------------------*/ //atic int chin (int ech, char *buf, unsigned cnt); //atic const char *fmtmk (const char *fmts, ...); //atic char *strim (int sp, char *str); //atic char *tg2 (int x, int y); /*------ Exit/Interrput routines ---------------------------------------*/ //atic void bye_bye (int eno, const char *str); //atic void stop (int dont_care_sig); //atic void std_err (const char *str); //atic void suspend (int dont_care_sig); /*------ Misc Color/Highlighting support -------------------------------*/ //atic void capsmk (WIN_t *q); //atic void msg_save (const char *fmts, ...); //atic void show_msg (const char *str); //atic void show_pmt (const char *str); //atic void show_special (const char *glob); /*------ Small Utility routines ----------------------------------------*/ //atic char *ask4str (const char *prompt); //atic float get_float (const char *prompt); //atic int get_int (const char *prompt); //atic char *scale_num (unsigned num, const unsigned width, const unsigned type); //atic char *scale_tics (TICS_t tics, const unsigned width); //atic float time_elapsed (void); /*------ Library Alternatives ------------------------------------------*/ //atic void *alloc_c (unsigned numb); //atic void *alloc_r (void *q, unsigned numb); //atic proc_t **refreshprocs (proc_t **tbl); /*------ Startup routines ----------------------------------------------*/ //atic void before (char *me); //atic void configs_read (void); //atic void parse_args (char **args); //atic void whack_terminal (void); /*------ Field Selection/Ordering routines -----------------------------*/ //atic void display_fields (void); //atic void fields_reorder (void); //atic void fields_toggle (void); /*------ Windows/Field Groups support ----------------------------------*/ //atic void win_colsheads (WIN_t *q); //atic void win_names (WIN_t *q, const char *name); //atic void win_select (int ch); //atic void win_sortset (WIN_t *q, const int which); //atic int win_warn (void); //atic void winsclr (WIN_t *q, int save); //atic void wins_colors (void); //atic void wins_reflag (int what, int flg); //atic void wins_resize (int dont_care_sig); //atic void windows_stage1 (void); //atic void windows_stage2 (void); /*------ Per-Frame Display support -------------------------------------*/ //atic void cpudo (FILE *fp, const char *fmt, CPUS_t *cpu, const char *pfx); //atic void frame_states (proc_t **p, int show); //atic void frame_storage (void); //atic void mkcol (WIN_t *q, unsigned idx, int sta, int *pad, char *buf, ...); //atic void show_a_task (WIN_t *q, proc_t *task); /*------ Main Screen routines ------------------------------------------*/ //atic void do_key (unsigned c); //atic proc_t **do_summary (void); //atic void do_window (proc_t **ppt, WIN_t *q, int *lscr); //atic void sohelpme (int wix, int max); //atic void so_lets_see_em (void); /*------ Entry point ---------------------------------------------------*/ // int main (int dont_care_argc, char **argv); /* just sanity check(s)... */ #if USRNAMSIZ < GETBUFSIZ #error "Jeeze, USRNAMSIZ Must NOT be less than GETBUFSIZ !" #endif #endif /* _Itop */