*/
-/*
- * Utility routine to print possibly larger than 32 bit integers in a
- * portable fashion. Filled with zeros.
- */
-static void
-print_val(char *s, uint64 val, unsigned int base, size_t len)
-{
- int i;
-
- for (i = len; i > 0; i--)
- {
- int digit = val % base;
-
- s[i - 1] = '0' + digit;
- val = val / base;
- }
-}
-
/*
* Maximum file size for a tar member: The limit inherent in the
* format is 2^33-1 bytes (nearly 8 GB). But we don't want to exceed
*/
#define MAX_TAR_MEMBER_FILELEN (((int64) 1 << Min(33, sizeof(pgoff_t)*8 - 1)) - 1)
-static int
-_tarChecksum(char *header)
-{
- int i,
- sum;
-
- /*
- * Per POSIX, the checksum is the simple sum of all bytes in the header,
- * treating the bytes as unsigned, and treating the checksum field (at
- * offset 148) as though it contained 8 spaces.
- */
- sum = 8 * ' '; /* presumed value for checksum field */
- for (i = 0; i < 512; i++)
- if (i < 148 || i >= 156)
- sum += 0xFF & header[i];
- return sum;
-}
-
/*
* Given the member, write the TAR header & send the file.
*
{
char h[512];
- /*
- * Note: most of the fields in a tar header are not supposed to be
- * null-terminated. We use sprintf, which will write a null after the
- * required bytes; that null goes into the first byte of the next field.
- * This is okay as long as we fill the fields in order.
- */
- memset(h, 0, sizeof(h));
-
- /* Name 100 */
- sprintf(&h[0], "%.99s", filename);
- if (linktarget != NULL || S_ISDIR(statbuf->st_mode))
- {
- /*
- * We only support symbolic links to directories, and this is
- * indicated in the tar format by adding a slash at the end of the
- * name, the same as for regular directories.
- */
- int flen = strlen(filename);
-
- flen = Min(flen, 99);
- h[flen] = '/';
- h[flen + 1] = '\0';
- }
-
- /* Mode 8 */
- sprintf(&h[100], "%07o ", (int) statbuf->st_mode);
-
- /* User ID 8 */
- sprintf(&h[108], "%07o ", statbuf->st_uid);
-
- /* Group 8 */
- sprintf(&h[116], "%07o ", statbuf->st_gid);
-
- /* File size 12 - 11 digits, 1 space; use print_val for 64 bit support */
- if (linktarget != NULL || S_ISDIR(statbuf->st_mode))
- /* Symbolic link or directory has size zero */
- print_val(&h[124], 0, 8, 11);
- else
- print_val(&h[124], statbuf->st_size, 8, 11);
- sprintf(&h[135], " ");
-
- /* Mod Time 12 */
- sprintf(&h[136], "%011o ", (int) statbuf->st_mtime);
-
- /* Checksum 8 cannot be calculated until we've filled all other fields */
-
- if (linktarget != NULL)
- {
- /* Type - Symbolic link */
- sprintf(&h[156], "2");
- /* Link Name 100 */
- sprintf(&h[157], "%.99s", linktarget);
- }
- else if (S_ISDIR(statbuf->st_mode))
- /* Type - directory */
- sprintf(&h[156], "5");
- else
- /* Type - regular file */
- sprintf(&h[156], "0");
-
- /* Magic 6 */
- sprintf(&h[257], "ustar");
-
- /* Version 2 */
- sprintf(&h[263], "00");
-
- /* User 32 */
- /* XXX: Do we need to care about setting correct username? */
- sprintf(&h[265], "%.31s", "postgres");
-
- /* Group 32 */
- /* XXX: Do we need to care about setting correct group name? */
- sprintf(&h[297], "%.31s", "postgres");
-
- /* Major Dev 8 */
- sprintf(&h[329], "%07o ", 0);
-
- /* Minor Dev 8 */
- sprintf(&h[337], "%07o ", 0);
-
- /* Prefix 155 - not used, leave as nulls */
-
- /*
- * We mustn't overwrite the next field while inserting the checksum.
- * Fortunately, the checksum can't exceed 6 octal digits, so we just write
- * 6 digits, a space, and a null, which is legal per POSIX.
- */
- sprintf(&h[148], "%06o ", _tarChecksum(h));
+ tarCreateHeader(h, filename, linktarget, statbuf->st_size,
+ statbuf->st_mode, statbuf->st_uid, statbuf->st_gid,
+ statbuf->st_mtime);
- /* Now send the completed header. */
pq_putmessage('d', h, 512);
}
static int tarPrintf(ArchiveHandle *AH, TAR_MEMBER *th, const char *fmt,...) __attribute__((format(PG_PRINTF_ATTRIBUTE, 3, 4)));
static void _tarAddFile(ArchiveHandle *AH, TAR_MEMBER *th);
-static int _tarChecksum(char *th);
static TAR_MEMBER *_tarPositionTo(ArchiveHandle *AH, const char *filename);
static size_t tarRead(void *buf, size_t len, TAR_MEMBER *th);
static size_t tarWrite(const void *buf, size_t len, TAR_MEMBER *th);
return cnt;
}
-static int
-_tarChecksum(char *header)
-{
- int i,
- sum;
-
- /*
- * Per POSIX, the checksum is the simple sum of all bytes in the header,
- * treating the bytes as unsigned, and treating the checksum field (at
- * offset 148) as though it contained 8 spaces.
- */
- sum = 8 * ' '; /* presumed value for checksum field */
- for (i = 0; i < 512; i++)
- if (i < 148 || i >= 156)
- sum += 0xFF & header[i];
- return sum;
-}
-
bool
isValidTarHeader(char *header)
{
int sum;
- int chk = _tarChecksum(header);
+ int chk = tarChecksum(header);
sscanf(&header[148], "%8o", &sum);
(unsigned long) len);
/* Calc checksum */
- chk = _tarChecksum(h);
+ chk = tarChecksum(h);
sscanf(&h[148], "%8o", &sum);
/*
}
-/*
- * Utility routine to print possibly larger than 32 bit integers in a
- * portable fashion. Filled with zeros.
- */
-static void
-print_val(char *s, uint64 val, unsigned int base, size_t len)
-{
- int i;
-
- for (i = len; i > 0; i--)
- {
- int digit = val % base;
-
- s[i - 1] = '0' + digit;
- val = val / base;
- }
-}
-
-
static void
_tarWriteHeader(TAR_MEMBER *th)
{
char h[512];
- /*
- * Note: most of the fields in a tar header are not supposed to be
- * null-terminated. We use sprintf, which will write a null after the
- * required bytes; that null goes into the first byte of the next field.
- * This is okay as long as we fill the fields in order.
- */
- memset(h, 0, sizeof(h));
-
- /* Name 100 */
- sprintf(&h[0], "%.99s", th->targetFile);
-
- /* Mode 8 */
- sprintf(&h[100], "0000600 ");
-
- /* User ID 8 */
- sprintf(&h[108], "0004000 ");
-
- /* Group 8 */
- sprintf(&h[116], "0002000 ");
-
- /* File size 12 - 11 digits, 1 space; use print_val for 64 bit support */
- print_val(&h[124], th->fileLen, 8, 11);
- sprintf(&h[135], " ");
-
- /* Mod Time 12 */
- sprintf(&h[136], "%011o ", (int) time(NULL));
-
- /* Checksum 8 cannot be calculated until we've filled all other fields */
-
- /* Type - regular file */
- sprintf(&h[156], "0");
-
- /* Link Name 100 (leave as nulls) */
-
- /* Magic 6 */
- sprintf(&h[257], "ustar");
-
- /* Version 2 */
- sprintf(&h[263], "00");
-
- /* User 32 */
- /* XXX: Do we need to care about setting correct username? */
- sprintf(&h[265], "%.31s", "postgres");
-
- /* Group 32 */
- /* XXX: Do we need to care about setting correct group name? */
- sprintf(&h[297], "%.31s", "postgres");
-
- /* Major Dev 8 */
- sprintf(&h[329], "%07o ", 0);
-
- /* Minor Dev 8 */
- sprintf(&h[337], "%07o ", 0);
-
- /* Prefix 155 - not used, leave as nulls */
-
- /*
- * We mustn't overwrite the next field while inserting the checksum.
- * Fortunately, the checksum can't exceed 6 octal digits, so we just write
- * 6 digits, a space, and a null, which is legal per POSIX.
- */
- sprintf(&h[148], "%06o ", _tarChecksum(h));
+ tarCreateHeader(h, th->targetFile, NULL, th->fileLen, 0600, 04000, 02000, time(NULL));
/* Now write the completed header. */
if (fwrite(h, 1, 512, th->tarFH) != 512)
/* port/pgmkdirp.c */
extern int pg_mkdir_p(char *path, int omode);
+/* port/tar.c */
+void tarCreateHeader(char *h, const char *filename, const char *linktarget, size_t size, mode_t mode, uid_t uid, gid_t gid, time_t mtime);
+int tarChecksum(char *header);
+
#endif /* PG_PORT_H */
OBJS = $(LIBOBJS) chklocale.o dirmod.o erand48.o exec.o fls.o inet_net_ntop.o \
noblock.o path.o pgcheckdir.o pg_crc.o pgmkdirp.o pgsleep.o \
- pgstrcasecmp.o qsort.o qsort_arg.o sprompt.o thread.o
+ pgstrcasecmp.o qsort.o qsort_arg.o sprompt.o tar.o thread.o
# foo_srv.o and foo.o are both built from foo.c, but only foo.o has -DFRONTEND
OBJS_SRV = $(OBJS:%.o=%_srv.o)
--- /dev/null
+#include "c.h"
+#include <sys/stat.h>
+
+/*
+ * Utility routine to print possibly larger than 32 bit integers in a
+ * portable fashion. Filled with zeros.
+ */
+static void
+print_val(char *s, uint64 val, unsigned int base, size_t len)
+{
+ int i;
+
+ for (i = len; i > 0; i--)
+ {
+ int digit = val % base;
+
+ s[i - 1] = '0' + digit;
+ val = val / base;
+ }
+}
+
+
+/*
+ * Calculate the tar checksum for a header. The header is assumed to always
+ * be 512 bytes, per the tar standard.
+ */
+int
+tarChecksum(char *header)
+{
+ int i,
+ sum;
+
+ /*
+ * Per POSIX, the checksum is the simple sum of all bytes in the header,
+ * treating the bytes as unsigned, and treating the checksum field (at
+ * offset 148) as though it contained 8 spaces.
+ */
+ sum = 8 * ' '; /* presumed value for checksum field */
+ for (i = 0; i < 512; i++)
+ if (i < 148 || i >= 156)
+ sum += 0xFF & header[i];
+ return sum;
+}
+
+
+/*
+ * Fill in the buffer pointed to by h with a tar format header. This buffer
+ * must always have space for 512 characters, which is a requirement by
+ * the tar format.
+ */
+void
+tarCreateHeader(char *h, const char *filename, const char *linktarget,
+ size_t size, mode_t mode, uid_t uid, gid_t gid, time_t mtime)
+{
+ /*
+ * Note: most of the fields in a tar header are not supposed to be
+ * null-terminated. We use sprintf, which will write a null after the
+ * required bytes; that null goes into the first byte of the next field.
+ * This is okay as long as we fill the fields in order.
+ */
+ memset(h, 0, 512); /* assume tar header size */
+
+ /* Name 100 */
+ sprintf(&h[0], "%.99s", filename);
+ if (linktarget != NULL || S_ISDIR(mode))
+ {
+ /*
+ * We only support symbolic links to directories, and this is
+ * indicated in the tar format by adding a slash at the end of the
+ * name, the same as for regular directories.
+ */
+ int flen = strlen(filename);
+
+ flen = Min(flen, 99);
+ h[flen] = '/';
+ h[flen + 1] = '\0';
+ }
+
+ /* Mode 8 */
+ sprintf(&h[100], "%07o ", (int) mode);
+
+ /* User ID 8 */
+ sprintf(&h[108], "%07o ", uid);
+
+ /* Group 8 */
+ sprintf(&h[116], "%07o ", gid);
+
+ /* File size 12 - 11 digits, 1 space; use print_val for 64 bit support */
+ if (linktarget != NULL || S_ISDIR(mode))
+ /* Symbolic link or directory has size zero */
+ print_val(&h[124], 0, 8, 11);
+ else
+ print_val(&h[124], size, 8, 11);
+ sprintf(&h[135], " ");
+
+ /* Mod Time 12 */
+ sprintf(&h[136], "%011o ", (int) mtime);
+
+ /* Checksum 8 cannot be calculated until we've filled all other fields */
+
+ if (linktarget != NULL)
+ {
+ /* Type - Symbolic link */
+ sprintf(&h[156], "2");
+ /* Link Name 100 */
+ sprintf(&h[157], "%.99s", linktarget);
+ }
+ else if (S_ISDIR(mode))
+ /* Type - directory */
+ sprintf(&h[156], "5");
+ else
+ /* Type - regular file */
+ sprintf(&h[156], "0");
+
+ /* Magic 6 */
+ sprintf(&h[257], "ustar");
+
+ /* Version 2 */
+ sprintf(&h[263], "00");
+
+ /* User 32 */
+ /* XXX: Do we need to care about setting correct username? */
+ sprintf(&h[265], "%.31s", "postgres");
+
+ /* Group 32 */
+ /* XXX: Do we need to care about setting correct group name? */
+ sprintf(&h[297], "%.31s", "postgres");
+
+ /* Major Dev 8 */
+ sprintf(&h[329], "%07o ", 0);
+
+ /* Minor Dev 8 */
+ sprintf(&h[337], "%07o ", 0);
+
+ /* Prefix 155 - not used, leave as nulls */
+
+ /*
+ * We mustn't overwrite the next field while inserting the checksum.
+ * Fortunately, the checksum can't exceed 6 octal digits, so we just write
+ * 6 digits, a space, and a null, which is legal per POSIX.
+ */
+ sprintf(&h[148], "%06o ", tarChecksum(h));
+}
projects / postgresql / commitdiff