Test cases of dup2() for radix tree__alloc_fd
I have written a test case of dup2()
This is dup2() functionality test case. The dup2() makes newfd be the copy of oldfd, closing newfd first if necessary.
This test case covers below scenarios
* Provide invalid file descriptor to dup2()
* Fill up all file descriptor table and try to duplicate a file descriptor using dup2().
* Using dup2() duplicate both file descriptor return by the pipe.
* Check inode number after passing newfd and oldfd to fstat(). inode number should be same.
Upon successful execution this program will return zero value, otherwise, it will return -1.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 | #include <stdio.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <errno.h> #include <time.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <errno.h> int maxfd; int dup2_misc_tc() { int *fd, i, maxfd; int ret, goodfd; goodfd = open("test/file1", O_CREAT | O_RDWR, 0644); if(goodfd == -1) { printf("dup2_misc_tc() : dup2 failed...\n"); return -1; } ret = dup2(-1, goodfd); if(ret == -1) { printf("dup2_misc_tc1 : Pass \n"); } else { printf("dup2_misc_tc1: fail \n"); } ret = dup2(goodfd, -1); if(ret == -1) { printf("dup2_misc_tc1 : Pass \n"); } else { printf("dup2_misc_tc1: fail \n"); } close(goodfd); unlink("test/file1"); return 0; } int max_fd_dup2() { int *fd, i; int ret; char buf[15]; maxfd = getdtablesize(); fd = malloc(maxfd * sizeof(int)); printf("maxfd = %d\n",maxfd); for(i = 0; i < (maxfd-3); i++) { sprintf(buf, "test/myfile%d", i); fd[i] = open(buf, O_CREAT | O_RDWR, 0644); if (fd[i] == -1) { printf("max_fd_dup2() :: open() failed...\n"); return -1; } } printf("here ***************\n"); ret = dup2(10,24); if(ret == -1) printf("max_fd_dup2: tc: Fail\n"); else printf("max_fd_dup2: tc: Pass\n"); ret = dup2(10,maxfd); if(ret == -1) printf("max_fd_dup2: tc: Pass\n"); else printf("max_fd_dup2: tc: Fail\n"); return 0; } int pipe_dup2_tc() { int fd[2]; int ret; ret = pipe(fd); if(ret == -1) { printf("pipe_dup2_tc : Pipe Failed\n"); return -1; } ret = dup2(fd[0],5); if(ret == -1) printf("pipe_dup2_tc : fail\n"); else printf("pipe_dup2_tc: pass1\n"); ret = dup2(fd[1],6); if(ret == -1) printf("pipe_dup2_tc : fail\n"); else printf("pipe_dup2_tc: pass2\n"); close(fd[0]); close(fd[1]); return 0; } int dup2_ino_tc() { struct stat buf1, buf2; char buf[20]; int ret, oldfd, newfd, fd_fd; oldfd = open("test/file11", O_CREAT | O_RDWR, 0644); if(oldfd == -1) { printf("dup_misc_tc() : open() failed...\n"); return -1; } newfd = open("test/file12", O_CREAT | O_RDWR, 0644); if(newfd == -1) { printf("dup_misc_tc() : open() failed...\n"); return -1; } ret = dup2(oldfd,newfd); if (ret == -1) { printf("dup2_ino_tc : fail\n"); } else { printf("dup2_ino_tc : pass\n"); } ret = fstat(oldfd, &buf1); /* get the file status */ if(ret == -1) { printf("dup2_ino_tc() : fstat() failed...\n"); return -1; } ret = fstat(newfd, &buf2); if(ret == -1) { printf("dup2_ino_tc() : fstat() failed...\n"); return -1; } printf("buf1.st_ino = %lu\n",buf1.st_ino); printf("buf2.st_ino = %lu\n",buf2.st_ino); if(buf1.st_ino == buf2.st_ino) printf("dup2_ino_tc : pass\n"); else printf("dup2_ino_tc : fail\n"); close(oldfd); close(newfd); unlink("test/file1"); return 0; } int close_fd(int count) { int i; for(i = 3; i < count; i++) { close(i); } } void unlink_files(int count) { char buf[15]; int i; for(i = 0; i < count; i++) { sprintf(buf,"test/myfile%d",i); unlink(buf); } } int main(int argc, char **argv) { int err = 0; char *name; int goodfd; if(argc < 2) { printf("usage: %s <tcNUM> \n", argv[0]); printf("Provide oprion to program as tc1, tc2, tc3, tc4\n"); return -1; } name = argv[1]; if(strcmp(name, "tc1") == 0) { err = dup2_misc_tc(); if(err == -1) { return -1; } } else if(strcmp(name, "tc2") == 0) { max_fd_dup2(); close_fd(maxfd-3); unlink_files(maxfd); } else if(strcmp(name, "tc3") == 0) { pipe_dup2_tc(); } else if(strcmp(name, "tc4") == 0) { dup2_ino_tc(); } return 0; } |
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