| 1 | static char *sccsid = "@(#)rm.c 4.4 (Berkeley) %G%"; |
| 2 | int errcode; |
| 3 | short uid, euid; |
| 4 | |
| 5 | #include <stdio.h> |
| 6 | #include <sys/types.h> |
| 7 | #include <sys/stat.h> |
| 8 | #include <sys/dir.h> |
| 9 | |
| 10 | char *sprintf(); |
| 11 | |
| 12 | main(argc, argv) |
| 13 | char *argv[]; |
| 14 | { |
| 15 | register char *arg; |
| 16 | int fflg, iflg, rflg; |
| 17 | |
| 18 | fflg = 0; |
| 19 | if (isatty(0) == 0) |
| 20 | fflg++; |
| 21 | iflg = 0; |
| 22 | rflg = 0; |
| 23 | uid = getuid(); |
| 24 | euid = geteuid(); |
| 25 | while(argc>1 && argv[1][0]=='-') { |
| 26 | arg = *++argv; |
| 27 | argc--; |
| 28 | |
| 29 | /* |
| 30 | * all files following a null option are considered file names |
| 31 | */ |
| 32 | if (*(arg+1) == '\0') break; |
| 33 | |
| 34 | while(*++arg != '\0') |
| 35 | switch(*arg) { |
| 36 | case 'f': |
| 37 | fflg++; |
| 38 | break; |
| 39 | case 'i': |
| 40 | iflg++; |
| 41 | break; |
| 42 | case 'r': |
| 43 | rflg++; |
| 44 | break; |
| 45 | default: |
| 46 | printf("rm: unknown option %s\n", *argv); |
| 47 | exit(1); |
| 48 | } |
| 49 | } |
| 50 | while(--argc > 0) { |
| 51 | if(!strcmp(*++argv, "..")) { |
| 52 | fprintf(stderr, "rm: cannot remove `..'\n"); |
| 53 | continue; |
| 54 | } |
| 55 | rm(*argv, fflg, rflg, iflg, 0); |
| 56 | } |
| 57 | |
| 58 | exit(errcode); |
| 59 | } |
| 60 | |
| 61 | rm(arg, fflg, rflg, iflg, level) |
| 62 | char arg[]; |
| 63 | { |
| 64 | struct stat buf; |
| 65 | struct direct direct; |
| 66 | char name[100]; |
| 67 | int d; |
| 68 | |
| 69 | if(stat(arg, &buf)) { |
| 70 | if (fflg==0) { |
| 71 | printf("rm: %s nonexistent\n", arg); |
| 72 | ++errcode; |
| 73 | } |
| 74 | return; |
| 75 | } |
| 76 | if ((buf.st_mode&S_IFMT) == S_IFDIR) { |
| 77 | if(rflg) { |
| 78 | if (access(arg, 02) < 0) { |
| 79 | if (fflg==0) |
| 80 | printf("%s not changed\n", arg); |
| 81 | errcode++; |
| 82 | return; |
| 83 | } |
| 84 | if(iflg && level!=0) { |
| 85 | printf("remove directory %s? ", arg); |
| 86 | if(!yes()) |
| 87 | return; |
| 88 | } |
| 89 | if((d=open(arg, 0)) < 0) { |
| 90 | printf("rm: cannot read %s?\n", arg); |
| 91 | exit(1); |
| 92 | } |
| 93 | while(read(d, (char *)&direct, sizeof(direct)) == sizeof(direct)) { |
| 94 | if(direct.d_ino != 0 && !dotname(direct.d_name)) { |
| 95 | sprintf(name, "%s/%.14s", arg, direct.d_name); |
| 96 | rm(name, fflg, rflg, iflg, level+1); |
| 97 | } |
| 98 | } |
| 99 | close(d); |
| 100 | errcode += rmdir(arg, iflg); |
| 101 | return; |
| 102 | } |
| 103 | printf("rm: %s directory\n", arg); |
| 104 | ++errcode; |
| 105 | return; |
| 106 | } |
| 107 | |
| 108 | if(iflg) { |
| 109 | printf("rm: remove %s? ", arg); |
| 110 | if(!yes()) |
| 111 | return; |
| 112 | } |
| 113 | else if(!fflg) { |
| 114 | if (access(arg, 02)<0) { |
| 115 | if (uid == buf.st_uid || euid == buf.st_uid) { |
| 116 | printf("rm: override protection %o for %s? ", |
| 117 | buf.st_mode&0777, arg); |
| 118 | if(!yes()) |
| 119 | return; |
| 120 | } else { |
| 121 | printf("rm: %s: not owner.\n", arg); |
| 122 | return; |
| 123 | } |
| 124 | } |
| 125 | } |
| 126 | if(unlink(arg) && (fflg==0 || iflg)) { |
| 127 | printf("rm: %s not removed\n", arg); |
| 128 | ++errcode; |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | dotname(s) |
| 133 | char *s; |
| 134 | { |
| 135 | if(s[0] == '.') |
| 136 | if(s[1] == '.') |
| 137 | if(s[2] == '\0') |
| 138 | return(1); |
| 139 | else |
| 140 | return(0); |
| 141 | else if(s[1] == '\0') |
| 142 | return(1); |
| 143 | return(0); |
| 144 | } |
| 145 | |
| 146 | rmdir(f, iflg) |
| 147 | char *f; |
| 148 | { |
| 149 | int status, i; |
| 150 | |
| 151 | if(dotname(f)) |
| 152 | return(0); |
| 153 | if(iflg) { |
| 154 | printf("rm: remove %s? ", f); |
| 155 | if(!yes()) |
| 156 | return(0); |
| 157 | } |
| 158 | while((i=fork()) == -1) |
| 159 | sleep(3); |
| 160 | if(i) { |
| 161 | wait(&status); |
| 162 | return(status); |
| 163 | } |
| 164 | execl("/bin/rmdir", "rmdir", f, 0); |
| 165 | execl("/usr/bin/rmdir", "rmdir", f, 0); |
| 166 | printf("rm: can't find rmdir\n"); |
| 167 | exit(1); |
| 168 | } |
| 169 | |
| 170 | yes() |
| 171 | { |
| 172 | int i, b; |
| 173 | |
| 174 | i = b = getchar(); |
| 175 | while(b != '\n' && b != EOF) |
| 176 | b = getchar(); |
| 177 | return(i == 'y'); |
| 178 | } |