From c36f15dc80a39b3cb5492005a906948cbea14c65 Mon Sep 17 00:00:00 2001
From: Saturneric <eric.bktu@gmail.com>
Date: Mon, 7 Dec 2020 12:17:01 +0800
Subject: [PATCH] Add files.

---
 4/fileDirectory/.dirent.c.swp   | Bin 0 -> 12288 bytes
 4/fileDirectory/.filetime.c.swp | Bin 0 -> 12288 bytes
 4/fileDirectory/.mkdir.c.swp    | Bin 0 -> 12288 bytes
 4/fileDirectory/access.c        |  19 ++++++++++
 4/fileDirectory/chdir.c         |   6 ++++
 4/fileDirectory/chmod.c         |  22 ++++++++++++
 4/fileDirectory/chown.c         |   8 +++++
 4/fileDirectory/dirent.c        |  23 ++++++++++++
 4/fileDirectory/filetime.c      |  52 +++++++++++++++++++++++++++
 4/fileDirectory/links.c         |  60 ++++++++++++++++++++++++++++++++
 4/fileDirectory/mkdir.c         |  18 ++++++++++
 4/fileDirectory/rename.c        |  10 ++++++
 4/fileDirectory/stat.c          |  45 ++++++++++++++++++++++++
 4/fileDirectory/symlinks.c      |  34 ++++++++++++++++++
 4/fileDirectory/test/test1      | Bin 0 -> 256 bytes
 4/fileDirectory/test/test3      |   0
 4/fileDirectory/trunc.c         |   9 +++++
 4/fileDirectory/umask.c         |  17 +++++++++
 18 files changed, 323 insertions(+)
 create mode 100644 4/fileDirectory/.dirent.c.swp
 create mode 100644 4/fileDirectory/.filetime.c.swp
 create mode 100644 4/fileDirectory/.mkdir.c.swp
 create mode 100644 4/fileDirectory/access.c
 create mode 100644 4/fileDirectory/chdir.c
 create mode 100644 4/fileDirectory/chmod.c
 create mode 100644 4/fileDirectory/chown.c
 create mode 100644 4/fileDirectory/dirent.c
 create mode 100644 4/fileDirectory/filetime.c
 create mode 100644 4/fileDirectory/links.c
 create mode 100644 4/fileDirectory/mkdir.c
 create mode 100644 4/fileDirectory/rename.c
 create mode 100644 4/fileDirectory/stat.c
 create mode 100644 4/fileDirectory/symlinks.c
 create mode 100644 4/fileDirectory/test/test1
 create mode 100644 4/fileDirectory/test/test3
 create mode 100644 4/fileDirectory/trunc.c
 create mode 100644 4/fileDirectory/umask.c

diff --git a/4/fileDirectory/.dirent.c.swp b/4/fileDirectory/.dirent.c.swp
new file mode 100644
index 0000000000000000000000000000000000000000..65e0b12835e446ec13bd6a98560402306b156854
GIT binary patch
literal 12288
zcmeI2O=}ZD7{{l*`!0C&Y1-gMnzvdpU{gVI2~-c36a=AecP8n;b~a3A)0PrFi)YcV
zV14--p1kXK@G5xpKbv)FrKO$(@frAKb|=p~&ojSU$ZRz>x(}#TTM`%-g?Re@^X8A)
z1+ns22xWETm(LpOp-Zjt(bbL`pC0|pht$_yD)+S+^o-u?8mDYOj8uKO-q*3}XsaTZ
z*!{Z1lX0~_s(*S#{)P>(fy_Ya`qkDsacimB@bB}bIl6MW$8y*J8(;%$fDNz#Hoykh
z02}y^47lNpc#iYV=4ZZ^&ojTx`72LsfDNz#Hoykh02^QfY=8~00XDz}*uXz%Ae2H}
zIxoZv;Q#;s_51(Z1tGqIFW?h+2M)n2Fa`q<fh}+!+yhs^cjWm9K7d2;7Q6wk!As!l
z+yELVumSFX>wpIvU;}J`4X^<=zy{a=8(;%$fDQa@1CwG1qDhWb{+c&6?g~LsoQxFi
zXa_@lRQ$?Bh;sAxh|0}YEU6r)PfTf%w2^9Wk$e=cb5~d8rU{GO#~)DT%nC#_wA#3S
zP&%R5u_`<2r0Uuv=oV?>#0;k0QJb8K<0FTm-EG`O53;kNYXn#o$|9gbb8ULqTU)Cf
zAd{exvuWgLdPKUJcY$3##;eH;7N@H=vj&QTBtvDemz1@Mg|w_c-Os91JFi3sK2N9n
tXqq3%^KC(?=6Ape?S$F{<3!7fkDk{iic_g*W#ptzYTK(vmZrV>wV&Vs(B%LC

literal 0
HcmV?d00001

diff --git a/4/fileDirectory/.filetime.c.swp b/4/fileDirectory/.filetime.c.swp
new file mode 100644
index 0000000000000000000000000000000000000000..d1733e34430a66fcd886d92d362088b6b9d4e6b1
GIT binary patch
literal 12288
zcmeI2F>ljA6vwX}X$uH;bWNd3kmJN@kt*6Sb*TU$wJHcf6;k_LETwj^&w&U5f=>Vg
zLJSNbX5bruL|4SXz$btWSYhM;&JIZmw5$~`(l72izdOJCy<4hyy?TD>temrJ0-u9I
zynpnr@pbg5Shy&JiUXI1cl)d~bsC41U0zh3zh~d3l*)=uy>1Y0tcJmjrBJKbZ@Q{7
zTk(UIS`1?4>L~7-NC%tB{-+B5{!G5Z2G{@$q}ngfO^BJAQzai$g-Ln%&?>8818jf|
zumLu}2G{@_U;}L6KQf@(BjOJBJDTr#HouN+yXGNZ*Z><~18jf|umLu}2G{@_U;}J`
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za1Y!C8YEx?n7!@6-f+omfDNz#Hoykh02^QfY+z3sxFw{F6}==ZtMdYZ+lmrZ^u5wh
z<YXab|H>~r^CoP^L8$#=!B6R};4qOYj-&W;Sil@91Hah2fmIz#Qc_Zq3$j|0H|dFH
z;F7Z@>(a&FG$|XZ(ooY3VJy*c>gw!PTe*2oZOzoVV_{KSg_7Q3&MK2yC3<GCKF^W$
zx-2_+LD-H&sdzZeEEenv%`jgx1xuc5EH7SI&V=;#9wvE3C*?7x*763w@g&P^!`7V!
zC0b^m{b&<g>_x^|Z&g~<>~ptOhZZ$KZ%qVQrE=Sc60pPd)VCAepeXC+a2hqFpGA=+
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zdf#t7mc)5A%^&DJ9h_|1VDBkyvl)cNP84|N+=!_lbX%#X<U*poAhNHX8W>8$0HecW
RNjIs`hK5IdH`FZ}`UyG=RMr3h

literal 0
HcmV?d00001

diff --git a/4/fileDirectory/.mkdir.c.swp b/4/fileDirectory/.mkdir.c.swp
new file mode 100644
index 0000000000000000000000000000000000000000..37480d0a233f9da32d727ed0f94892c23eee770d
GIT binary patch
literal 12288
zcmeI&KTq307zXec_WluU?a;$8Boc`OWk71ggrFG^$RUMFm5>{s;RHEH=QARrzyRN(
z8xjlR161mORAxHz0T|&+^gSm;EfutD)#s!qw%>bmj(?k#`&fBbTM*ObN#gOG==kJv
z?Rs#Gs_%)UQB7C=)2N3wGum~RX65$7-TSV^uiGr@D81g$YNw{HG;!FJ{*)i9Ejg=<
zY}&+h{MKfqO!=>F|L_el0|5wh1u`3#rk~L3$%%?9jCvztc&Gs#2tWV=5P$##AOHaf
zK;S<Tu<Zdl;O8CeJ@ZiSIB@USyTkzk5P$##AOHafKmY;|fB*y_0D*r{AdHCSo)VpM
z-2eY~@BcT?h^{ynoNt^X&LPKes+?Dxmz)=zTmJ5M&N=5R=L_eI<JSDl!GHh+AOHaf
zKmY;|fB*y_009U*BCtn780of_i^>}k_bvs`x>CQVG{H?g+D2&`7d+GA9ppk9lb8?M
zE4oP)7xHSs^EZ-~^z;4bR;Jc>ANiJZuPCabQWU$y{oVEN7R={=TQILaw&1u3R#t<c
zzb^ke(F&C=Y$qzpZ!{XoSZUeq6ZN%P(5MIElRI1KpRM-Kg85*nI~y!6zvZpGN;kK%
dNQ!D|BbAglW_~JVT5<K)TG~nd)P~koe*n<ypuGS9

literal 0
HcmV?d00001

diff --git a/4/fileDirectory/access.c b/4/fileDirectory/access.c
new file mode 100644
index 0000000..037375e
--- /dev/null
+++ b/4/fileDirectory/access.c
@@ -0,0 +1,19 @@
+#include <unistd.h>
+#include <stdio.h>
+
+int main(void){
+  if(access("./access.c", R_OK | W_OK) < 0){
+    printf("access error for acccess.c\n");
+  }
+  else {
+    printf("read and write access OK\n");
+  }
+
+  if(access("./access.c", R_OK | X_OK) < 0){
+    printf("access error for acccess.c\n");
+  }
+  else {
+    printf("exec access OK\n");
+  }
+  return 0;
+}
diff --git a/4/fileDirectory/chdir.c b/4/fileDirectory/chdir.c
new file mode 100644
index 0000000..0eeaf73
--- /dev/null
+++ b/4/fileDirectory/chdir.c
@@ -0,0 +1,6 @@
+#include <unistd.h>
+
+int main(void) {
+  // TODO
+  return 0;
+}
diff --git a/4/fileDirectory/chmod.c b/4/fileDirectory/chmod.c
new file mode 100644
index 0000000..f37ea6f
--- /dev/null
+++ b/4/fileDirectory/chmod.c
@@ -0,0 +1,22 @@
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#define RWRWRW S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
+#define RWRR S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH
+
+int main(void){
+  int fd = open("./test/test2", O_RDWR);
+  if(fd == -1){
+    printf("open file test1 error\n");
+  }
+  
+  fchmod(fd, RWRWRW);
+
+  close(fd);
+
+  chmod("./test/test1", RWRR);
+
+  return 0;
+}
diff --git a/4/fileDirectory/chown.c b/4/fileDirectory/chown.c
new file mode 100644
index 0000000..f86e3d7
--- /dev/null
+++ b/4/fileDirectory/chown.c
@@ -0,0 +1,8 @@
+#include <unistd.h>
+#include <limits.h>
+#include <stdio.h>
+
+int main(void){
+  printf("%ld\n", pathconf("./chown.c",_POSIX_CHOWN_RESTRICTED));
+  return 0;
+}
diff --git a/4/fileDirectory/dirent.c b/4/fileDirectory/dirent.c
new file mode 100644
index 0000000..b2a9c4f
--- /dev/null
+++ b/4/fileDirectory/dirent.c
@@ -0,0 +1,23 @@
+#include <dirent.h>
+#include <stdio.h>
+
+int main(void) {
+  DIR *pdir = opendir(".");
+
+  if(pdir == NULL) {
+    printf("opendir error\n");
+    return -1;
+  }
+
+ struct dirent *pdirent = NULL;
+  
+ while((pdirent = readdir(pdir)) != NULL){
+   long index = telldir(pdir);
+   printf("%15s %18ld %lu\n", pdirent->d_name, index, pdirent->d_ino);
+
+ }
+
+ closedir(pdir);
+
+  return 0;
+}
diff --git a/4/fileDirectory/filetime.c b/4/fileDirectory/filetime.c
new file mode 100644
index 0000000..e10d239
--- /dev/null
+++ b/4/fileDirectory/filetime.c
@@ -0,0 +1,52 @@
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdio.h>
+
+
+int main(void) {
+  int fd = open("./filetime.c", O_RDWR);
+  
+  if(fd == -1) {
+    printf("open file eror filetime.c\n");
+    return -1;
+  }
+
+  
+  struct stat buf;
+
+  if(fstat(fd, &buf) < 0){
+    printf("stat error\n");
+    return -1;
+  }
+
+  struct timespec atim = buf.st_atim,
+                  ctim = buf.st_ctim, 
+                  mtim = buf.st_mtim;
+
+  printf("sec  time: %12ld %12ld %12ld\n", atim.tv_sec, ctim.tv_sec, mtim.tv_sec);
+  printf("nsec time: %12ld %12ld %12ld\n", atim.tv_nsec, ctim.tv_nsec, mtim.tv_nsec);
+
+  int fd1 = open("./test/test3", O_RDWR);
+
+  if(fd1 == -1) {
+    printf("open file error test3\n");
+    return -1;
+  }
+
+  struct timespec times[2];
+
+  times[0] = atim;
+  times[1] = ctim;
+
+  if(futimens(fd1, times) < 0) {
+    printf("futimens error\n");
+    return -1;
+  }
+
+  close(fd1);
+
+  close(fd);
+
+  return 0;
+}
diff --git a/4/fileDirectory/links.c b/4/fileDirectory/links.c
new file mode 100644
index 0000000..e9cd9a2
--- /dev/null
+++ b/4/fileDirectory/links.c
@@ -0,0 +1,60 @@
+#include <errno.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+
+extern int errno;
+
+int main(void) {
+  int fd = open("./links.c", O_RDWR);
+
+  if(fd == -1) {
+    printf("oprn error test1\n");
+    return -1;
+  }
+  
+  struct stat buf;
+
+  if(fstat(fd, &buf) < 0) {
+    printf("fstat error\n");
+    return -1;
+  }
+
+  printf("%lu\n", buf.st_nlink);
+
+  close(fd);
+
+  fd = open(".", O_RDONLY);
+
+  if(fd == -1){
+    printf("open error .\n");
+    return -1;
+  }
+
+  int fd2 = open("/home/eric", O_RDONLY);
+
+  if(fd2 == -1){
+    printf("open error ~\n");
+    return -1;
+  }
+  
+  if(linkat(fd, "links.c", fd2, "test/linksl.c", 0) < 0) {
+    printf("linkat error\n");
+    if(errno != 0) {
+      printf("strerr: %s\n", strerror(errno)); 
+    }
+  }
+
+  if(unlinkat(fd2, "test/linksl.c", 0) < 0) {
+    printf("unlinkat error\n");
+    return -1;
+  }
+
+  close(fd);
+  close(fd2);
+
+
+  return 0;
+}
diff --git a/4/fileDirectory/mkdir.c b/4/fileDirectory/mkdir.c
new file mode 100644
index 0000000..bf92f77
--- /dev/null
+++ b/4/fileDirectory/mkdir.c
@@ -0,0 +1,18 @@
+#include <sys/stat.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#define RWXRR S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IROTH
+
+int main(void) {
+  if(mkdir("/home/eric/test/testmkdir", RWXRR) < 0) {
+    printf("mkdir error\n");
+  }
+
+  if(rmdir("/home/eric/test/testmkdir") < 0) {
+    printf("rmdir error\n");
+    return -1;
+  }
+  
+  return 0;
+}
diff --git a/4/fileDirectory/rename.c b/4/fileDirectory/rename.c
new file mode 100644
index 0000000..3eaa34b
--- /dev/null
+++ b/4/fileDirectory/rename.c
@@ -0,0 +1,10 @@
+#include <fcntl.h>
+#include <stdio.h>
+
+int main(void) {
+  if(renameat(AT_FDCWD, "test/test2", AT_FDCWD, "test/test3") < 0) {
+    printf("rename error\n");
+    return -1;
+  }
+  return 0;
+}
diff --git a/4/fileDirectory/stat.c b/4/fileDirectory/stat.c
new file mode 100644
index 0000000..21b5d87
--- /dev/null
+++ b/4/fileDirectory/stat.c
@@ -0,0 +1,45 @@
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int printStat(struct stat buf){
+
+  printf("DEV: %ld UID: %d SIZE: %ld BLOCKS: %ld\n", buf.st_dev, buf.st_uid, buf.st_size, buf.st_blocks);
+  printf("MODE: %d INO: %ld BLKSIZE: %ld GID: %d\n", buf.st_mode, buf.st_ino, buf.st_blksize, buf.st_gid);
+
+  if(S_ISREG(buf.st_mode)){
+    printf("a regular file\n");
+  } 
+  else if(S_ISDIR(buf.st_mode)) {
+    printf("a directory\n");
+  }
+}
+
+int main(void){
+  struct stat buf;
+  if(stat("./stat.c", &buf) == -1){
+    printf("stat error\n");
+    return -1;
+  }
+  
+  printStat(buf);
+
+  int fd = open(".", O_RDONLY);
+
+  if(fd == -1){
+    printf("open O_RDONLY failed\n");
+    return -1;
+  }
+
+  if(fstat(fd, &buf) < 0){
+    printf("fstat error\n");
+    return -1;
+  }
+
+  printStat(buf);
+
+  close(fd);
+
+  return 0;
+}
diff --git a/4/fileDirectory/symlinks.c b/4/fileDirectory/symlinks.c
new file mode 100644
index 0000000..dda2ebb
--- /dev/null
+++ b/4/fileDirectory/symlinks.c
@@ -0,0 +1,34 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+int main(void) {
+  
+  int fd = open("/home/eric", O_RDONLY);
+
+  if(fd == -1) {
+    printf("open error for directory .\n");
+    return -1;
+  }
+
+  if(symlinkat("symlinks.c", fd, "test/symlinksl.c") < 0) {
+    printf("symlink error\n");
+    return -1;
+  }
+
+  close(fd);
+
+  char buf[1024];
+  ssize_t rbit = readlink("/home/eric/test/symlinksl.c", buf, 1024);
+
+  if(rbit < 0) {
+    printf("readlink error\n");
+    return -1;
+  }
+
+  buf[rbit] = 0;
+
+  printf("rbit: %d buf: %s\n", rbit, buf);
+
+  return 0;
+}
diff --git a/4/fileDirectory/test/test1 b/4/fileDirectory/test/test1
new file mode 100644
index 0000000000000000000000000000000000000000..65f57c2ee985713476ac0b6e3483e6fe472e2176
GIT binary patch
literal 256
LcmZQz7})>-0RR92

literal 0
HcmV?d00001

diff --git a/4/fileDirectory/test/test3 b/4/fileDirectory/test/test3
new file mode 100644
index 0000000..e69de29
diff --git a/4/fileDirectory/trunc.c b/4/fileDirectory/trunc.c
new file mode 100644
index 0000000..33b6a93
--- /dev/null
+++ b/4/fileDirectory/trunc.c
@@ -0,0 +1,9 @@
+#include <unistd.h>
+#include <stdio.h>
+
+int main(void){
+  if(truncate("./test/test1", 256) < 0) {
+    printf("truncate error for file test1\n");
+  }
+  return 0;
+}
diff --git a/4/fileDirectory/umask.c b/4/fileDirectory/umask.c
new file mode 100644
index 0000000..d34db96
--- /dev/null
+++ b/4/fileDirectory/umask.c
@@ -0,0 +1,17 @@
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+#define RWRWRW S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH
+
+int main(void) {
+  umask(0);
+  if(creat("./test/test1", RWRWRW) < 0){
+    printf("creat error for test1\n");
+  }
+  umask(S_IWGRP | S_IROTH  | S_IWOTH);
+
+  if(creat("./test/test2", RWRWRW) < 0){
+    printf("creat error for test1\n");
+  }
+}