读取配置文件失败后添加默认的垃圾桶目录

build_mv.sh

@@ -1,12 +1,16 @@
-#!/bin/bsh
+#!/bin/bash
 #
 # Build MV command
-# based on coreutils-8.32 
+# Based on coreutils-8.32 
+# Test System: Debian GNU/Linux bookworm/sid (WSL)  
 # 
 
 function init() {
     SHELL_FOLDER=$(dirname $(readlink -f "$0"));
     set -x
+    CC=${CROSS_COMPILE}gcc
+    AR=${CROSS_COMPILE}ar
+    STRIP=${CROSS_COMPILE}strip
 }
 
 function LIB() {    
@@ -17,7 +21,7 @@ function LIB() {
         echo $i
         o=$(echo $i | sed 's/\.c/\.o/');
         echo $o;
-        gcc -I. -I./lib -Ilib -I./lib -g -O2 -c -o lib/${o} lib/${i}
+        ${CC} -I. -I./lib -Ilib -I./lib -g -O2 -c -o lib/${o} lib/${i}
     done
 
     cd ${SHELL_FOLDER}/lib;
@@ -26,21 +30,21 @@ function LIB() {
 
 function MV() {
     cd ${SHELL_FOLDER};
-    gcc -I./lib -c -o version.o version.c
-    ar cr libver.a version.o
-    gcc -I. -I./lib -g -O2 -c -o remove.o remove.c
-    gcc -I. -I./lib -g -O2 -c -o copy.o copy.c
-    gcc -I. -I./lib -g -O2 -c -o cp-hash.o cp-hash.c
-    gcc -I. -I./lib -g -O2 -c -o extent-scan.o extent-scan.c
-    gcc -I. -I./lib -g -O2 -c -o force-link.o force-link.c
-    gcc -I. -I./lib -g -O2 -c -o selinux.o selinux.c
-    gcc -I. -I./lib -g -O2 -c -o mv.o mv.c
+    ${CC} -I./lib -c -o version.o version.c
+    ${AR} cr libver.a version.o
+    ${CC} -I. -I./lib -g -O2 -c -o remove.o remove.c
+    ${CC} -I. -I./lib -g -O2 -c -o copy.o copy.c
+    ${CC} -I. -I./lib -g -O2 -c -o cp-hash.o cp-hash.c
+    ${CC} -I. -I./lib -g -O2 -c -o extent-scan.o extent-scan.c
+    ${CC} -I. -I./lib -g -O2 -c -o force-link.o force-link.c
+    ${CC} -I. -I./lib -g -O2 -c -o selinux.o selinux.c
+    ${CC} -I. -I./lib -g -O2 -c -o mv.o mv.c
 
-    gcc -g -O2 -Wl,--as-needed -o mv \
+    ${CC} -g -O2 -Wl,--as-needed -o mv \
         mv.o remove.o copy.o cp-hash.o extent-scan.o force-link.o selinux.o libver.a lib/libcoreutils.a lib/libcoreutils.a \
        -lselinux -lacl -lattr -pthread  -lpcre2-8 -ldl -static
-    
     mv ./mv rm_
+    $STRIP ./rm_
 }
 
 

mv.c

@@ -22,6 +22,7 @@
 #include <sys/types.h>
 #include <assert.h>
 #include <selinux/selinux.h>
+#include <stdlib.h>
 
 #include "system.h"
 #include "backupfile.h"
@@ -329,6 +330,8 @@ If you specify more than one of -i, -f, -n, only the final one takes effect.\n\
       fputs (VERSION_OPTION_DESCRIPTION, stdout);
       printf("\n\033[31mInstead of rm command to prevent mistaken deletion of files\n\
 Author: aixiao@aixiao.me\033[0m\n");
+      printf("\n\033[31m代替rm命令，以防止错误删除文件\n\
+作者: aixiao@aixiao.me\033[0m\n");
 
 
       emit_backup_suffix_note ();
@@ -337,6 +340,44 @@ Author: aixiao@aixiao.me\033[0m\n");
   exit (status);
 }
 
+// 在这里删除字符串里的'\n'
+static void delchar(char *str, char c)
+{
+    int i, j;
+    
+    for (i = j = 0; str[i] != '\0'; i++) {
+        if (str[i] != c)        //判断是否有和待删除字符一样的字符
+        {
+            str[j++] = str[i];
+        }
+    }
+    str[j] = '\0';              //字符串结束
+}
+
+// 读取配置文件
+static char *read_config(char *config_file, char *buffer)
+{
+    char temp_buffer[270];
+    FILE *fd;
+
+
+    fd = fopen(config_file, "r"); //打开文件
+    if (fd == NULL) {
+        return strcpy(buffer, "/tmp/");
+    }
+    memset(temp_buffer, 0, 270);
+    size_t ret = fread(temp_buffer, sizeof(temp_buffer) / sizeof((temp_buffer)[0]), sizeof(*temp_buffer), fd);  //读取配置
+    /*
+    if (ret != sizeof(*temp_buffer)) {
+        fprintf(stderr, "fread() failed: %zu\n", ret);
+        exit(EXIT_FAILURE);
+    }
+    */
+    delchar(temp_buffer, 10);   // 删除'\n'
+
+    return strcpy(buffer, temp_buffer);
+}
+
 int
 main (int argc, char **argv)
 {
@@ -352,32 +393,41 @@ main (int argc, char **argv)
   char **file;
   bool selinux_enabled = (0 < is_selinux_enabled ());
 
-    char *argvs[20];                
+    char *argvs[20];                // 复制 *argv[] 到 *argvs[20]
     for (int i=0; i<argc; i++) {
         argvs[i] = argv[i];
     }
     
-    char s[270];
-    FILE *fd;
-    fd = fopen("/etc/rm_.conf", "r");
-    if (fd == NULL) {
-        //char s[] = "/tmp/";
-        memset(s, 0, 270);
-        strcpy(s, "/tmp/");
-    } else {
-        while(fgets(s, 270, fd) != NULL)
+    char delete_path[270];
+    memset(delete_path, 0, 270);
+    read_config("/etc/rm_.conf", delete_path);      // 如果有配置文件存在, 读取配置文件, 如果读取配置文件失败默认使用"/tmp/"目录来当作垃圾桶目录
+    //printf("%s", delete_path);
+    
+    char mkdir_s[270];
+    strcpy(mkdir_s, "mkdir -p ");
+    strcat(mkdir_s, delete_path);
+    //printf("%s\n", mkdir_s);
+    
+    if (!access(delete_path, 0)) {
+        ;//printf("%s EXISITS!\n", delete_path);
+    }
+    else
     {
-            int len = strlen(s);
-            s[len-1] = '\0';  //去掉换行符
-            //printf("%s %d \n", s, len - 1);
+        printf("%s DOESN'T EXISIT!\n", delete_path);
+        if (-1 == system("mount -o remount,rw /")) {    // 调用mount命令改变根目录读写权限
+        	perror("system mount");
+        }
+        if (-1 == system(mkdir_s)) {                    // 调用mkdir命令创建不存在的垃圾桶目录
+        	perror("system mkdir");
+        } else {
+            printf("%s Directory Created Successfully!\n", delete_path);
         }
     }
     
-    
-    argvs[argc] = s; 
-    char **p9;
-    p9 = &argvs;
-    argc = argc + 1;
+    argvs[argc] = delete_path;      // 使argv最后一个参数为垃圾桶目录
+    char **head_argvs;
+    head_argvs = &(argvs[0]);       // head_argvs指向argvs[0]
+    argc = argc + 1;                // 改变argc数
 
   initialize_main (&argc, &argvs);
   set_program_name (argvs[0]);
@@ -457,16 +507,17 @@ main (int argc, char **argv)
           usage (EXIT_FAILURE);
         }
     }
-x.interactive = I_ALWAYS_YES;
+x.interactive = I_ALWAYS_YES;       // 默认使用-f参数
 
   n_files = argc - optind;
-  file = (p9 + optind);
+  file = (head_argvs + optind);
   
 /*
+    // 测试, 打印新的argv参数
     int i=0;
     while(i < argc)
     {
-        printf("%s\n", p9[i]);
+        printf("%s\n", head_argvs[i]);
         i++;
     }
     printf("%d\n", argc);