[PATCH] libmisc/untar: Set the perms to the value in the tar file.
Joel Sherrill
joel at rtems.org
Mon Aug 1 01:15:42 UTC 2016
Looks good. Was there a test case (before or after)?
--joel
On Sun, Jul 31, 2016 at 8:03 PM, Chris Johns <chrisj at rtems.org> wrote:
> This patch parses the mode field in the tar header and sets the
> directory or file to the mode value in the header.
>
> Closes #2768.
> ---
> cpukit/libmisc/untar/untar.c | 47
> ++++++++++++++++++++++++++------------------
> cpukit/libmisc/untar/untar.h | 7 ++++++-
> 2 files changed, 34 insertions(+), 20 deletions(-)
>
> diff --git a/cpukit/libmisc/untar/untar.c b/cpukit/libmisc/untar/untar.c
> index 9a14f67..ecf1877 100644
> --- a/cpukit/libmisc/untar/untar.c
> +++ b/cpukit/libmisc/untar/untar.c
> @@ -250,6 +250,7 @@ static int
> Untar_ProcessHeader(
> const char *bufr,
> char *fname,
> + unsigned long *mode,
> unsigned long *file_size,
> unsigned long *nblocks,
> unsigned char *linkflag,
> @@ -286,6 +287,8 @@ Untar_ProcessHeader(
> strncpy(fname, bufr, MAX_NAME_FIELD_SIZE);
> fname[MAX_NAME_FIELD_SIZE] = '\0';
>
> + *mode = strtoul(&bufr[100], NULL, 8);
> +
> *linkflag = bufr[156];
> *file_size = _rtems_octal2ulong(&bufr[124], 12);
>
> @@ -299,7 +302,8 @@ Untar_ProcessHeader(
> rtems_printf(printer, "untar: symlink: %s -> %s\n", linkname, fname);
> symlink(linkname, fname);
> } else if (*linkflag == REGTYPE) {
> - rtems_printf(printer, "untar: file: %s (%i)\n", fname, (int)
> *file_size);
> + rtems_printf(printer, "untar: file: %s (s:%i,m:%04o)\n",
> + fname, (int) *file_size, (int) *mode);
> *nblocks = (((*file_size) + 511) & ~511) / 512;
> if (Make_Path(printer, fname, false) < 0) {
> retval = UNTAR_FAIL;
> @@ -318,7 +322,7 @@ Untar_ProcessHeader(
> if (!S_ISDIR(stat_buf.st_mode)) {
> r = unlink(fname);
> if (r == 0) {
> - r = mkdir(fname, S_IRWXU | S_IRWXG | S_IRWXO);
> + r = mkdir(fname, *mode);
> }
> }
> }
> @@ -362,15 +366,16 @@ Untar_FromMemory_Print(
> const rtems_printer *printer
> )
> {
> - FILE *fp;
> + int fd;
> const char *tar_ptr = (const char *)tar_buf;
> const char *bufr;
> char fname[100];
> int retval = UNTAR_SUCCESSFUL;
> unsigned long ptr;
> - unsigned long nblocks;
> - unsigned long file_size;
> - unsigned char linkflag;
> + unsigned long nblocks = 0;
> + unsigned long file_size = 0;
> + unsigned long mode = 0;
> + unsigned char linkflag = 0;
>
> rtems_printf(printer, "untar: memory at %p (%zu)\n", tar_buf, size);
>
> @@ -385,20 +390,21 @@ Untar_FromMemory_Print(
> bufr = &tar_ptr[ptr];
> ptr += 512;
>
> - retval = Untar_ProcessHeader(bufr, fname, &file_size, &nblocks,
> &linkflag, printer);
> + retval = Untar_ProcessHeader(bufr, fname, &mode, &file_size,
> + &nblocks, &linkflag, printer);
>
> if (retval != UNTAR_SUCCESSFUL)
> break;
>
> if (linkflag == REGTYPE) {
> - if ((fp = fopen(fname, "w")) == NULL) {
> + if ((fd = open(fname, O_TRUNC | O_CREAT | O_WRONLY, mode)) == -1) {
> Print_Error(printer, "open", fname);
> ptr += 512 * nblocks;
> } else {
> unsigned long sizeToGo = file_size;
> - size_t len;
> - size_t i;
> - size_t n;
> + ssize_t len;
> + ssize_t i;
> + ssize_t n;
>
> /*
> * Read out the data. There are nblocks of data where nblocks is
> the
> @@ -406,7 +412,7 @@ Untar_FromMemory_Print(
> */
> for (i = 0; i < nblocks; i++) {
> len = ((sizeToGo < 512L) ? (sizeToGo) : (512L));
> - n = fwrite(&tar_ptr[ptr], 1, len, fp);
> + n = write(fd, &tar_ptr[ptr], len);
> if (n != len) {
> Print_Error(printer, "write", fname);
> retval = UNTAR_FAIL;
> @@ -415,7 +421,7 @@ Untar_FromMemory_Print(
> ptr += 512;
> sizeToGo -= n;
> }
> - fclose(fp);
> + close(fd);
> }
>
> }
> @@ -485,9 +491,10 @@ Untar_FromFile_Print(
> char fname[100];
> int retval;
> unsigned long i;
> - unsigned long nblocks;
> - unsigned long file_size;
> - unsigned char linkflag;
> + unsigned long nblocks = 0;
> + unsigned long file_size = 0;
> + unsigned long mode = 0;
> + unsigned char linkflag = 0;
>
> retval = UNTAR_SUCCESSFUL;
>
> @@ -508,7 +515,8 @@ Untar_FromFile_Print(
> break;
> }
>
> - retval = Untar_ProcessHeader(bufr, fname, &file_size, &nblocks,
> &linkflag, printer);
> + retval = Untar_ProcessHeader(bufr, fname, &mode, &file_size,
> + &nblocks, &linkflag, printer);
>
> if (retval != UNTAR_SUCCESSFUL)
> break;
> @@ -521,7 +529,7 @@ Untar_FromFile_Print(
> * is the size rounded to the nearest 512-byte boundary.
> */
>
> - if ((out_fd = creat(fname, 0644)) == -1) {
> + if ((out_fd = creat(fname, mode)) == -1) {
> (void) lseek(fd, SEEK_CUR, 512UL * nblocks);
> } else {
> for (i = 0; i < nblocks; i++) {
> @@ -579,6 +587,7 @@ int Untar_FromChunk_Print(
> retval = Untar_ProcessHeader(
> &context->header[0],
> &context->fname[0],
> + &context->mode,
> &context->todo_bytes,
> &context->todo_blocks,
> &linkflag,
> @@ -591,7 +600,7 @@ int Untar_FromChunk_Print(
> }
>
> if (linkflag == REGTYPE) {
> - context->out_fd = creat(&context->fname[0], 0644);
> + context->out_fd = creat(&context->fname[0], context->mode);
>
> if (context->out_fd >= 0) {
> context->state = UNTAR_CHUNK_WRITE;
> diff --git a/cpukit/libmisc/untar/untar.h b/cpukit/libmisc/untar/untar.h
> index 4d00d36..3c8bb74 100644
> --- a/cpukit/libmisc/untar/untar.h
> +++ b/cpukit/libmisc/untar/untar.h
> @@ -74,9 +74,14 @@ typedef struct {
> size_t done_bytes;
>
> /**
> + * @brief Mode of the file.
> + */
> + unsigned long mode;
> +
> + /**
> * @brief Overall amount of bytes to be processed.
> */
> - long unsigned todo_bytes;
> + unsigned long todo_bytes;
>
> /**
> * @brief Overall amount of blocks to be processed.
> --
> 2.4.6
>
> _______________________________________________
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> http://lists.rtems.org/mailman/listinfo/devel
>
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