Store/restore file permissions
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This commit is contained in:
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17f89e5a68
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2 changed files with 147 additions and 1 deletions
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@ -45,8 +45,16 @@ Following the file-count bytes, the following bytes are added for each file:
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3. 4 bytes bit-flags
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3. 4 bytes bit-flags
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1. The first byte
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1. The first byte
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1. The first bit is set if the file is a symbolic link.
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1. The first bit is set if the file is a symbolic link.
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2. The second bit is "user read permission".
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3. The third bit is "user write permission".
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4. The fourth bit is "user execute permission".
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5. The fifth bit is "group read permission".
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6. The sixth bit is "group write permission".
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7. The seventh bit is "group execute permission".
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8. The eighth bit is "other read permission".
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2. The second byte.
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2. The second byte.
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1. Currently unused.
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1. The first bit is "other write permission".
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2. The second bit is "other execute permission".
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3. The third byte.
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3. The third byte.
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1. Currently unused.
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1. Currently unused.
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4. The fourth byte.
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4. The fourth byte.
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138
src/archiver.c
138
src/archiver.c
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@ -29,6 +29,7 @@
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#include <errno.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <fcntl.h>
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#include <spawn.h>
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#include <spawn.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <unistd.h>
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#endif
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#endif
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@ -264,6 +265,50 @@ int write_files_fn(void *data, void *ud) {
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for (unsigned int idx = 0; idx < temp_to_write->size; ++idx) {
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for (unsigned int idx = 0; idx < temp_to_write->size; ++idx) {
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((unsigned char *)temp_to_write->buf)[idx] = 0;
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((unsigned char *)temp_to_write->buf)[idx] = 0;
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}
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}
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// Get file stats.
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struct stat stat_buf;
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memset(&stat_buf, 0, sizeof(struct stat));
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int stat_fd = open(file_info->filename, O_RDONLY);
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if (stat_fd == -1) {
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// Error.
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return 1;
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}
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int stat_status = fstat(stat_fd, &stat_buf);
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close(stat_fd);
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if (stat_status != 0) {
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// Error.
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return 1;
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}
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if ((stat_buf.st_mode & S_IRUSR) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x2;
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}
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if ((stat_buf.st_mode & S_IWUSR) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x4;
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}
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if ((stat_buf.st_mode & S_IXUSR) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x8;
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}
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if ((stat_buf.st_mode & S_IRGRP) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x10;
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}
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if ((stat_buf.st_mode & S_IWGRP) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x20;
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}
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if ((stat_buf.st_mode & S_IXGRP) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x40;
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}
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if ((stat_buf.st_mode & S_IROTH) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x80;
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}
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if ((stat_buf.st_mode & S_IWOTH) != 0) {
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((unsigned char *)temp_to_write->buf)[1] |= 0x1;
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}
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if ((stat_buf.st_mode & S_IXOTH) != 0) {
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((unsigned char *)temp_to_write->buf)[1] |= 0x2;
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}
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simple_archiver_list_add(to_write, temp_to_write, free_internal_to_write);
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simple_archiver_list_add(to_write, temp_to_write, free_internal_to_write);
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// Get compressed file length.
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// Get compressed file length.
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@ -347,6 +392,54 @@ int write_files_fn(void *data, void *ud) {
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for (unsigned int idx = 0; idx < temp_to_write->size; ++idx) {
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for (unsigned int idx = 0; idx < temp_to_write->size; ++idx) {
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((unsigned char *)temp_to_write->buf)[idx] = 0;
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((unsigned char *)temp_to_write->buf)[idx] = 0;
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}
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}
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#if SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_COSMOPOLITAN || \
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SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_MAC || \
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SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_LINUX
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// Get file stats.
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struct stat stat_buf;
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memset(&stat_buf, 0, sizeof(struct stat));
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int stat_fd = open(file_info->filename, O_RDONLY);
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if (stat_fd == -1) {
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// Error.
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return 1;
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}
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int stat_status = fstat(stat_fd, &stat_buf);
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close(stat_fd);
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if (stat_status != 0) {
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// Error.
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return 1;
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}
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if ((stat_buf.st_mode & S_IRUSR) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x2;
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}
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if ((stat_buf.st_mode & S_IWUSR) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x4;
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}
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if ((stat_buf.st_mode & S_IXUSR) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x8;
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}
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if ((stat_buf.st_mode & S_IRGRP) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x10;
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}
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if ((stat_buf.st_mode & S_IWGRP) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x20;
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}
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if ((stat_buf.st_mode & S_IXGRP) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x40;
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}
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if ((stat_buf.st_mode & S_IROTH) != 0) {
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((unsigned char *)temp_to_write->buf)[0] |= 0x80;
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}
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if ((stat_buf.st_mode & S_IWOTH) != 0) {
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((unsigned char *)temp_to_write->buf)[1] |= 0x1;
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}
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if ((stat_buf.st_mode & S_IXOTH) != 0) {
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((unsigned char *)temp_to_write->buf)[1] |= 0x2;
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}
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#endif
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simple_archiver_list_add(to_write, temp_to_write, free_internal_to_write);
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simple_archiver_list_add(to_write, temp_to_write, free_internal_to_write);
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// Write file length.
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// Write file length.
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@ -622,6 +715,7 @@ int simple_archiver_parse_archive_info(FILE *in_f, int do_extract,
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return SDAS_INVALID_FILE;
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return SDAS_INVALID_FILE;
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}
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}
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simple_archiver_helper_16_bit_be(&u16);
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simple_archiver_helper_16_bit_be(&u16);
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__attribute__((cleanup(free_malloced_memory))) void *out_f_name = NULL;
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__attribute__((cleanup(free_FILE_helper))) FILE *out_f = NULL;
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__attribute__((cleanup(free_FILE_helper))) FILE *out_f = NULL;
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if (u16 < 1024) {
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if (u16 < 1024) {
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if (fread(buf, 1, u16 + 1, in_f) != (size_t)u16 + 1) {
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if (fread(buf, 1, u16 + 1, in_f) != (size_t)u16 + 1) {
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@ -647,6 +741,8 @@ int simple_archiver_parse_archive_info(FILE *in_f, int do_extract,
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if (!skip) {
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if (!skip) {
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simple_archiver_helper_make_dirs((const char *)buf);
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simple_archiver_helper_make_dirs((const char *)buf);
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out_f = fopen((const char *)buf, "wb");
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out_f = fopen((const char *)buf, "wb");
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out_f_name = malloc(strlen((const char *)buf) + 1);
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memcpy(out_f_name, buf, strlen((const char *)buf) + 1);
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}
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}
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}
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}
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} else {
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} else {
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@ -676,6 +772,8 @@ int simple_archiver_parse_archive_info(FILE *in_f, int do_extract,
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if (!skip) {
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if (!skip) {
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simple_archiver_helper_make_dirs((const char *)uc_heap_buf);
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simple_archiver_helper_make_dirs((const char *)uc_heap_buf);
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out_f = fopen((const char *)buf, "wb");
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out_f = fopen((const char *)buf, "wb");
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out_f_name = malloc(strlen((const char *)buf) + 1);
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memcpy(out_f_name, buf, strlen((const char *)buf) + 1);
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}
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}
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}
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}
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}
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}
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@ -684,6 +782,41 @@ int simple_archiver_parse_archive_info(FILE *in_f, int do_extract,
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return SDAS_INVALID_FILE;
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return SDAS_INVALID_FILE;
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}
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}
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unsigned int permissions = 0;
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#if SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_COSMOPOLITAN || \
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SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_MAC || \
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SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_LINUX
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if ((buf[0] & 0x2) != 0) {
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permissions |= S_IRUSR;
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}
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if ((buf[0] & 0x4) != 0) {
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permissions |= S_IWUSR;
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}
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if ((buf[0] & 0x8) != 0) {
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permissions |= S_IXUSR;
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}
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if ((buf[0] & 0x10) != 0) {
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permissions |= S_IRGRP;
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}
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if ((buf[0] & 0x20) != 0) {
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permissions |= S_IWGRP;
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}
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if ((buf[0] & 0x40) != 0) {
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permissions |= S_IXGRP;
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}
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if ((buf[0] & 0x80) != 0) {
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permissions |= S_IROTH;
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}
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if ((buf[1] & 0x1) != 0) {
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permissions |= S_IWOTH;
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}
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if ((buf[1] & 0x2) != 0) {
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permissions |= S_IXOTH;
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}
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#endif
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if ((buf[0] & 1) == 0) {
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if ((buf[0] & 1) == 0) {
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// Not a sybolic link.
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// Not a sybolic link.
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if (fread(&u64, 8, 1, in_f) != 1) {
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if (fread(&u64, 8, 1, in_f) != 1) {
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@ -833,6 +966,11 @@ int simple_archiver_parse_archive_info(FILE *in_f, int do_extract,
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waitpid(decompressor_pid, NULL, 0);
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waitpid(decompressor_pid, NULL, 0);
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if (chmod((const char *)out_f_name, permissions) == -1) {
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// Error.
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return 1;
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}
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fprintf(stderr, " Extracted.\n");
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fprintf(stderr, " Extracted.\n");
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#endif
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#endif
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} else {
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} else {
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