基于Linux C 接口封装的一些接口. 便于在实际Linux C应用开发中使用..zip

/* top.c - Source file: show Linux processes */ /* * Copyright (c) 2002, by: James C. Warner * All rights reserved. 8921 Hilloway Road * Eden Prairie, Minnesota 55347 USA * <warnerjc@worldnet.att.net> * * 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: * Albert D. Cahalan, <albert@users.sf.net> * Craig Small, <csmall@small.dropbear.id.au> * * Changes by Albert Cahalan, 2002-2004. */ #include <sys/ioctl.h> #include <sys/resource.h> #include <sys/time.h> #include <sys/types.h> #include <sys/stat.h> #include <ctype.h> #include <curses.h> #include <errno.h> #include <fcntl.h> #include <signal.h> #include <stdarg.h> #include <stdio.h> #include <stdlib.h> #include <string.h> // Foul POS defines all sorts of stuff... #include <term.h> #undef tab #include <termios.h> #include <time.h> #include <unistd.h> #include <values.h> #include "proc/devname.h" #include "proc/wchan.h" #include "proc/procps.h" #include "proc/readproc.h" #include "proc/escape.h" #include "proc/sig.h" #include "proc/sysinfo.h" #include "proc/version.h" #include "proc/whattime.h" #include "top.h" /*###### Miscellaneous global stuff ####################################*/ /* The original and new terminal attributes */ static struct termios Savedtty, Rawtty; static int Ttychanged = 0; /* Program name used in error messages and local 'rc' file name */ static char *Myname; /* Name of user config file (dynamically constructed) and our 'Current' rcfile contents, initialized with defaults but may be overridden with the local rcfile (old or new-style) values */ static char Rc_name [OURPATHSZ]; static RCF_t Rc = DEF_RCFILE; /* The run-time acquired page size */ static unsigned Page_size; static unsigned page_to_kb_shift; /* SMP Irix/Solaris mode */ static int Cpu_tot; static double pcpu_max_value; // usually 99.9, for %CPU display /* assume no IO-wait stats, overridden if linux 2.5.41 */ static const char *States_fmts = STATES_line2x4; /* Specific process id monitoring support */ static pid_t Monpids [MONPIDMAX] = { 0 }; static int Monpidsidx = 0; /* A postponed error message */ static char Msg_delayed [SMLBUFSIZ]; static int Msg_awaiting = 0; // This is the select() timeout. Clear it in sig handlers to avoid a race. // (signal happens just as we are about to select() and thus does not // break us out of the select(), causing us to delay until timeout) static volatile struct timeval tv; #define ZAP_TIMEOUT do{tv.tv_usec=0; tv.tv_sec=0;}while(0); /* Configurable Display support ##################################*/ /* Current screen dimensions. note: the number of processes displayed is tracked on a per window basis (see the WIN_t). Max_lines is the total number of screen rows after deducting summary information overhead. */ /* Current terminal screen size. */ static int Screen_cols, Screen_rows, Max_lines; // set to 1 if writing to the last column would be troublesome // (we don't distinguish the lowermost row from the other rows) static int avoid_last_column; /* This is really the number of lines needed to display the summary information (0 - nn), but is used as the relative row where we stick the cursor between frames. */ static int Msg_row; /* Global/Non-windows mode stuff that is NOT persistent */ static int No_ksyms = -1, // set to '0' if ksym avail, '1' otherwise PSDBopen = 0, // set to '1' if psdb opened (now postponed) Batch = 0, // batch mode, collect no input, dumb output Loops = -1, // number of iterations, -1 loops forever Secure_mode = 0; // set if some functionality restricted /* Some cap's stuff to reduce runtime calls -- to accomodate 'Batch' mode, they begin life as empty strings */ static char Cap_clr_eol [CAPBUFSIZ], Cap_clr_eos [CAPBUFSIZ], Cap_clr_scr [CAPBUFSIZ], Cap_rmam [CAPBUFSIZ], Cap_smam [CAPBUFSIZ], Cap_curs_norm [CAPBUFSIZ], Cap_curs_huge [CAPBUFSIZ], Cap_home [CAPBUFSIZ], Cap_norm [CAPBUFSIZ], Cap_reverse [CAPBUFSIZ], Caps_off [CAPBUFSIZ]; static int Cap_can_goto = 0; /* Some optimization stuff, to reduce output demands... The Pseudo_ guys are managed by wins_resize and frame_make. They are exploited in a macro and represent 90% of our optimization. The Stdout_buf is transparent to our code and regardless of whose buffer is used, stdout is flushed at frame end or if interactive. */ static char *Pseudo_scrn; static int Pseudo_row, Pseudo_cols, Pseudo_size; #ifndef STDOUT_IOLBF // less than stdout's normal buffer but with luck mostly '\n' anyway static char Stdout_buf[2048]; #endif /* ////////////////////////////////////////////////////////////// */ /* Special Section: multiple windows/field groups ---------------*/ /* The pointers to our four WIN_t's, and which of those is considered the 'current' window (ie. which window is associated with any summ info displayed and to which window commands are directed) */ static WIN_t Winstk [GROUPSMAX], *Curwin; /* Frame oriented stuff that can't remain local to any 1 function and/or that would be too cumbersome managed as parms, and/or that are simply more efficiently handled as globals (first 2 persist beyond a single frame, changed infrequently) */ static int Frames_libflags; // PROC_FILLxxx flags (0 = need new) //atic int Frames_maxcmdln; // the largest from the 4 windows static unsigned Frame_maxtask; // last known number of active tasks // ie. current 'size' of proc table static unsigned Frame_running, // state categories for this frame Frame_sleepin, Frame_stopped, Frame_zombied; static float Frame_tscale; // so we can '*' vs. '/' WHEN 'pcpu' static int Frame_srtflg, // the subject window's sort direction Frame_ctimes, // the subject window's ctimes flag Frame_cmdlin; // the subject window's cmdlin flag /* ////////////////////////////////////////////////////////////// */  /*###### Sort callbacks ################################################*/ /* * These happen to be coded in the same order as the enum 'pflag' * values. Note that 2 of these routines serve double duty -- * 2 columns each. */ SCB_NUMx(P_PID, XXXID) SCB_NUMx(P_PPD, ppid) SCB_STRx(P_URR, ruser) SCB_NUMx(P_UID, euid) SCB_STRx(P_URE, euser) SCB_STRx(P_GRP, egroup) SCB_NUMx(P_TTY, tty) SCB_NUMx(P_PRI, priority) SCB_NUMx(P_NCE, nice) SCB_NUMx(P_CPN, processor) SCB_NUM1(P_CPU, pcpu) // also serves P_TM2 ! static int sort_P_TME (const proc_t **P, const proc_t **Q) { if (Frame_ctimes) { if ( ((*P)->cutime + (*P)->cstime + (*P)->utime + (*P)->stime) < ((*Q)->cutime + (*Q)->cstime + (*Q)->utime + (*Q)->sti