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-rw-r--r--tar.c121
1 files changed, 76 insertions, 45 deletions
diff --git a/tar.c b/tar.c
index 7167d95..a53370e 100644
--- a/tar.c
+++ b/tar.c
@@ -37,6 +37,7 @@
#include <fcntl.h>
#include <signal.h>
#include <time.h>
+#include <utime.h>
#include <sys/types.h>
#include <sys/sysmacros.h>
@@ -106,8 +107,12 @@ static int warnedRoot;
static int eofFlag;
static long dataCc;
static int outFd;
-static char outName[TAR_NAME_SIZE];
+static const char *outName;
+static int mode;
+static int uid;
+static int gid;
+static time_t mtime;
/*
* Static data associated with the tar file.
@@ -364,8 +369,9 @@ static void readTarFile (int fileCount, char **fileTable)
* message is required on errors.
*/
if (tostdoutFlag == FALSE) {
- if (outFd >= 0)
- (void) close (outFd);
+ if (outFd >= 0) {
+ close (outFd);
+ }
}
}
@@ -378,29 +384,25 @@ static void readTarFile (int fileCount, char **fileTable)
static void
readHeader (const TarHeader * hp, int fileCount, char **fileTable)
{
- int mode;
- int uid;
- int gid;
int checkSum;
- unsigned int major;
- unsigned int minor;
- long size;
- time_t mtime;
- const char *name;
int cc;
int hardLink;
int softLink;
int devFileFlag;
+ unsigned int major;
+ unsigned int minor;
+ long size;
+ struct utimbuf utb;
/*
* If the block is completely empty, then this is the end of the
* archive file. If the name is null, then just skip this header.
*/
- name = hp->name;
+ outName = hp->name;
- if (*name == '\0') {
+ if (*outName == '\0') {
for (cc = TAR_BLOCK_SIZE; cc > 0; cc--) {
- if (*name++)
+ if (*outName++)
return;
}
@@ -447,16 +449,16 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
/*
* Check for a directory.
*/
- if (name[strlen (name) - 1] == '/')
+ if (outName[strlen (outName) - 1] == '/')
mode |= S_IFDIR;
/*
* Check for absolute paths in the file.
* If we find any, then warn the user and make them relative.
*/
- if (*name == '/') {
- while (*name == '/')
- name++;
+ if (*outName == '/') {
+ while (*outName == '/')
+ outName++;
if (warnedRoot==FALSE) {
fprintf (stderr,
@@ -470,7 +472,7 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
* See if we want this file to be restored.
* If not, then set up to skip it.
*/
- if (wantFileName (name, fileCount, fileTable) == FALSE) {
+ if (wantFileName (outName, fileCount, fileTable) == FALSE) {
if ( !hardLink && !softLink && (S_ISREG (mode) || S_ISCHR (mode)
|| S_ISBLK (mode) || S_ISSOCK(mode) || S_ISFIFO(mode) ) ) {
inHeader = (size == 0)? TRUE : FALSE;
@@ -494,7 +496,7 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
else
printf ("%9ld %s ", size, timeString (mtime));
}
- printf ("%s", name);
+ printf ("%s", outName);
if (hardLink)
printf (" (link to \"%s\")", hp->linkName);
@@ -515,22 +517,35 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
* We really want to extract the file.
*/
if (verboseFlag==TRUE)
- printf ("x %s\n", name);
+ printf ("x %s\n", outName);
if (hardLink) {
- if (link (hp->linkName, name) < 0)
- perror (name);
- chown(name, uid, gid);
- chmod(name, mode);
+ if (link (hp->linkName, outName) < 0)
+ perror (outName);
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime (outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
return;
}
if (softLink) {
#ifdef S_ISLNK
- if (symlink (hp->linkName, name) < 0)
- perror (name);
- chown(name, uid, gid);
- chmod(name, mode);
+ if (symlink (hp->linkName, outName) < 0)
+ perror (outName);
+ /* Try to change ownership of the symlink.
+ * If libs doesn't support that, don't bother.
+ * Changing the pointed-to file is the Wrong Thing(tm).
+ */
+#if (__GLIBC__ >= 2) && (__GLIBC_MINOR__ >= 1)
+ lchown(outName, uid, gid);
+#endif
+
+ /* Do not change permissions or date on symlink,
+ * since it changes the pointed to file instead. duh. */
#else
fprintf (stderr, "Cannot create symbolic links\n");
#endif
@@ -545,10 +560,14 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
* If the file is a directory, then just create the path.
*/
if (S_ISDIR (mode)) {
- createPath (name, mode);
- chown(name, uid, gid);
- chmod(name, mode);
-
+ createPath (outName, mode);
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime (outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
return;
}
@@ -556,7 +575,7 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
* There is a file to write.
* First create the path to it if necessary with default permissions.
*/
- createPath (name, 0777);
+ createPath (outName, 0777);
inHeader = (size == 0)? TRUE : FALSE;
dataCc = size;
@@ -569,21 +588,26 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
else {
if ( S_ISCHR(mode) || S_ISBLK(mode) || S_ISSOCK(mode) ) {
devFileFlag = TRUE;
- outFd = mknod (name, mode, makedev(major, minor) );
+ outFd = mknod (outName, mode, makedev(major, minor) );
}
else if (S_ISFIFO(mode) ) {
devFileFlag = TRUE;
- outFd = mkfifo(name, mode);
+ outFd = mkfifo(outName, mode);
} else {
- outFd = open (name, O_WRONLY | O_CREAT | O_TRUNC, mode);
+ outFd = open (outName, O_WRONLY | O_CREAT | O_TRUNC, mode);
}
if (outFd < 0) {
- perror (name);
+ perror (outName);
skipFileFlag = TRUE;
return;
}
- chown(name, uid, gid);
- chmod(name, mode);
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime (outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
}
@@ -591,7 +615,7 @@ readHeader (const TarHeader * hp, int fileCount, char **fileTable)
* If the file is empty, then that's all we need to do.
*/
if (size == 0 && (tostdoutFlag == FALSE) && (devFileFlag == FALSE)) {
- (void) close (outFd);
+ close (outFd);
outFd = -1;
}
}
@@ -625,7 +649,7 @@ static void readData (const char *cp, int count)
if (fullWrite (outFd, cp, count) < 0) {
perror (outName);
if (tostdoutFlag == FALSE) {
- (void) close (outFd);
+ close (outFd);
outFd = -1;
}
skipFileFlag = TRUE;
@@ -633,13 +657,21 @@ static void readData (const char *cp, int count)
}
/*
- * If the write failed, close the file and disable further
- * writes to this file.
+ * Check if we are done writing to the file now.
*/
if (dataCc <= 0 && tostdoutFlag == FALSE) {
+ struct utimbuf utb;
if (close (outFd))
perror (outName);
+ /* Set the file time */
+ utb.actime = mtime;
+ utb.modtime = mtime;
+ utime (outName, &utb);
+ /* Set the file permissions */
+ chown(outName, uid, gid);
+ chmod(outName, mode);
+
outFd = -1;
}
}
@@ -720,7 +752,6 @@ static void writeTarFile (int fileCount, char **fileTable)
static void saveFile (const char *fileName, int seeLinks)
{
int status;
- int mode;
struct stat statbuf;
if (verboseFlag==TRUE)
generated by cgit v1.1 at 2024-12-29 18:58:38 +0000