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-rw-r--r--applypatch/applypatch.cpp (renamed from applypatch/applypatch.c)155
1 files changed, 66 insertions, 89 deletions
diff --git a/applypatch/applypatch.c b/applypatch/applypatch.cpp
index 2358d4292..96bd88e88 100644
--- a/applypatch/applypatch.c
+++ b/applypatch/applypatch.cpp
@@ -15,6 +15,7 @@
*/
#include <errno.h>
+#include <fcntl.h>
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
@@ -22,9 +23,7 @@
#include <sys/stat.h>
#include <sys/statfs.h>
#include <sys/types.h>
-#include <fcntl.h>
#include <unistd.h>
-#include <stdbool.h>
#include "mincrypt/sha.h"
#include "applypatch.h"
@@ -65,7 +64,7 @@ int LoadFileContents(const char* filename, FileContents* file) {
}
file->size = file->st.st_size;
- file->data = malloc(file->size);
+ file->data = reinterpret_cast<unsigned char*>(malloc(file->size));
FILE* f = fopen(filename, "rb");
if (f == NULL) {
@@ -75,10 +74,9 @@ int LoadFileContents(const char* filename, FileContents* file) {
return -1;
}
- ssize_t bytes_read = fread(file->data, 1, file->size, f);
- if (bytes_read != file->size) {
- printf("short read of \"%s\" (%ld bytes of %ld)\n",
- filename, (long)bytes_read, (long)file->size);
+ size_t bytes_read = fread(file->data, 1, file->size, f);
+ if (bytes_read != static_cast<size_t>(file->size)) {
+ printf("short read of \"%s\" (%zu bytes of %zd)\n", filename, bytes_read, file->size);
free(file->data);
file->data = NULL;
return -1;
@@ -93,8 +91,8 @@ static size_t* size_array;
// comparison function for qsort()ing an int array of indexes into
// size_array[].
static int compare_size_indices(const void* a, const void* b) {
- int aa = *(int*)a;
- int bb = *(int*)b;
+ const int aa = *reinterpret_cast<const int*>(a);
+ const int bb = *reinterpret_cast<const int*>(b);
if (size_array[aa] < size_array[bb]) {
return -1;
} else if (size_array[aa] > size_array[bb]) {
@@ -132,8 +130,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
} else if (strcmp(magic, "EMMC") == 0) {
type = EMMC;
} else {
- printf("LoadPartitionContents called with bad filename (%s)\n",
- filename);
+ printf("LoadPartitionContents called with bad filename (%s)\n", filename);
return -1;
}
const char* partition = strtok(NULL, ":");
@@ -151,9 +148,9 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
}
int pairs = (colons-1)/2; // # of (size,sha1) pairs in filename
- int* index = malloc(pairs * sizeof(int));
- size_t* size = malloc(pairs * sizeof(size_t));
- char** sha1sum = malloc(pairs * sizeof(char*));
+ int* index = reinterpret_cast<int*>(malloc(pairs * sizeof(int)));
+ size_t* size = reinterpret_cast<size_t*>(malloc(pairs * sizeof(size_t)));
+ char** sha1sum = reinterpret_cast<char**>(malloc(pairs * sizeof(char*)));
for (i = 0; i < pairs; ++i) {
const char* size_str = strtok(NULL, ":");
@@ -175,7 +172,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
FILE* dev = NULL;
switch (type) {
- case MTD:
+ case MTD: {
if (!mtd_partitions_scanned) {
mtd_scan_partitions();
mtd_partitions_scanned = 1;
@@ -195,6 +192,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
return -1;
}
break;
+ }
case EMMC:
dev = fopen(partition, "rb");
@@ -210,7 +208,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
uint8_t parsed_sha[SHA_DIGEST_SIZE];
// allocate enough memory to hold the largest size.
- file->data = malloc(size[index[pairs-1]]);
+ file->data = reinterpret_cast<unsigned char*>(malloc(size[index[pairs-1]]));
char* p = (char*)file->data;
file->size = 0; // # bytes read so far
@@ -248,8 +246,7 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
const uint8_t* sha_so_far = SHA_final(&temp_ctx);
if (ParseSha1(sha1sum[index[i]], parsed_sha) != 0) {
- printf("failed to parse sha1 %s in %s\n",
- sha1sum[index[i]], filename);
+ printf("failed to parse sha1 %s in %s\n", sha1sum[index[i]], filename);
free(file->data);
file->data = NULL;
return -1;
@@ -280,15 +277,14 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
if (i == pairs) {
// Ran off the end of the list of (size,sha1) pairs without
// finding a match.
- printf("contents of partition \"%s\" didn't match %s\n",
- partition, filename);
+ printf("contents of partition \"%s\" didn't match %s\n", partition, filename);
free(file->data);
file->data = NULL;
return -1;
}
const uint8_t* sha_final = SHA_final(&sha_ctx);
- for (i = 0; i < SHA_DIGEST_SIZE; ++i) {
+ for (size_t i = 0; i < SHA_DIGEST_SIZE; ++i) {
file->sha1[i] = sha_final[i];
}
@@ -311,16 +307,14 @@ static int LoadPartitionContents(const char* filename, FileContents* file) {
int SaveFileContents(const char* filename, const FileContents* file) {
int fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, S_IRUSR | S_IWUSR);
if (fd < 0) {
- printf("failed to open \"%s\" for write: %s\n",
- filename, strerror(errno));
+ printf("failed to open \"%s\" for write: %s\n", filename, strerror(errno));
return -1;
}
ssize_t bytes_written = FileSink(file->data, file->size, &fd);
if (bytes_written != file->size) {
- printf("short write of \"%s\" (%ld bytes of %ld) (%s)\n",
- filename, (long)bytes_written, (long)file->size,
- strerror(errno));
+ printf("short write of \"%s\" (%zd bytes of %zd) (%s)\n",
+ filename, bytes_written, file->size, strerror(errno));
close(fd);
return -1;
}
@@ -348,8 +342,7 @@ int SaveFileContents(const char* filename, const FileContents* file) {
// Write a memory buffer to 'target' partition, a string of the form
// "MTD:<partition>[:...]" or "EMMC:<partition_device>:". Return 0 on
// success.
-int WriteToPartition(unsigned char* data, size_t len,
- const char* target) {
+int WriteToPartition(unsigned char* data, size_t len, const char* target) {
char* copy = strdup(target);
const char* magic = strtok(copy, ":");
@@ -370,7 +363,7 @@ int WriteToPartition(unsigned char* data, size_t len,
}
switch (type) {
- case MTD:
+ case MTD: {
if (!mtd_partitions_scanned) {
mtd_scan_partitions();
mtd_partitions_scanned = 1;
@@ -378,22 +371,19 @@ int WriteToPartition(unsigned char* data, size_t len,
const MtdPartition* mtd = mtd_find_partition_by_name(partition);
if (mtd == NULL) {
- printf("mtd partition \"%s\" not found for writing\n",
- partition);
+ printf("mtd partition \"%s\" not found for writing\n", partition);
return -1;
}
MtdWriteContext* ctx = mtd_write_partition(mtd);
if (ctx == NULL) {
- printf("failed to init mtd partition \"%s\" for writing\n",
- partition);
+ printf("failed to init mtd partition \"%s\" for writing\n", partition);
return -1;
}
- size_t written = mtd_write_data(ctx, (char*)data, len);
+ size_t written = mtd_write_data(ctx, reinterpret_cast<char*>(data), len);
if (written != len) {
- printf("only wrote %zu of %zu bytes to MTD %s\n",
- written, len, partition);
+ printf("only wrote %zu of %zu bytes to MTD %s\n", written, len, partition);
mtd_write_close(ctx);
return -1;
}
@@ -409,22 +399,20 @@ int WriteToPartition(unsigned char* data, size_t len,
return -1;
}
break;
+ }
- case EMMC:
- {
+ case EMMC: {
size_t start = 0;
- int success = 0;
+ bool success = false;
int fd = open(partition, O_RDWR | O_SYNC);
if (fd < 0) {
printf("failed to open %s: %s\n", partition, strerror(errno));
return -1;
}
- int attempt;
- for (attempt = 0; attempt < 2; ++attempt) {
+ for (int attempt = 0; attempt < 2; ++attempt) {
if (TEMP_FAILURE_RETRY(lseek(fd, start, SEEK_SET)) == -1) {
- printf("failed seek on %s: %s\n",
- partition, strerror(errno));
+ printf("failed seek on %s: %s\n", partition, strerror(errno));
return -1;
}
while (start < len) {
@@ -439,23 +427,20 @@ int WriteToPartition(unsigned char* data, size_t len,
start += written;
}
if (fsync(fd) != 0) {
- printf("failed to sync to %s (%s)\n",
- partition, strerror(errno));
+ printf("failed to sync to %s (%s)\n", partition, strerror(errno));
return -1;
}
if (close(fd) != 0) {
- printf("failed to close %s (%s)\n",
- partition, strerror(errno));
+ printf("failed to close %s (%s)\n", partition, strerror(errno));
return -1;
}
fd = open(partition, O_RDONLY);
if (fd < 0) {
- printf("failed to reopen %s for verify (%s)\n",
- partition, strerror(errno));
+ printf("failed to reopen %s for verify (%s)\n", partition, strerror(errno));
return -1;
}
- // drop caches so our subsequent verification read
+ // Drop caches so our subsequent verification read
// won't just be reading the cache.
sync();
int dc = open("/proc/sys/vm/drop_caches", O_WRONLY);
@@ -475,10 +460,11 @@ int WriteToPartition(unsigned char* data, size_t len,
}
unsigned char buffer[4096];
start = len;
- size_t p;
- for (p = 0; p < len; p += sizeof(buffer)) {
+ for (size_t p = 0; p < len; p += sizeof(buffer)) {
size_t to_read = len - p;
- if (to_read > sizeof(buffer)) to_read = sizeof(buffer);
+ if (to_read > sizeof(buffer)) {
+ to_read = sizeof(buffer);
+ }
size_t so_far = 0;
while (so_far < to_read) {
@@ -489,14 +475,14 @@ int WriteToPartition(unsigned char* data, size_t len,
partition, p, strerror(errno));
return -1;
}
- if ((size_t)read_count < to_read) {
+ if (static_cast<size_t>(read_count) < to_read) {
printf("short verify read %s at %zu: %zd %zu %s\n",
partition, p, read_count, to_read, strerror(errno));
}
so_far += read_count;
}
- if (memcmp(buffer, data+p, to_read)) {
+ if (memcmp(buffer, data+p, to_read) != 0) {
printf("verification failed starting at %zu\n", p);
start = p;
break;
@@ -534,10 +520,9 @@ int WriteToPartition(unsigned char* data, size_t len,
// the form "<digest>:<anything>". Return 0 on success, -1 on any
// error.
int ParseSha1(const char* str, uint8_t* digest) {
- int i;
const char* ps = str;
uint8_t* pd = digest;
- for (i = 0; i < SHA_DIGEST_SIZE * 2; ++i, ++ps) {
+ for (int i = 0; i < SHA_DIGEST_SIZE * 2; ++i, ++ps) {
int digit;
if (*ps >= '0' && *ps <= '9') {
digit = *ps - '0';
@@ -564,9 +549,8 @@ int ParseSha1(const char* str, uint8_t* digest) {
// found.
int FindMatchingPatch(uint8_t* sha1, char* const * const patch_sha1_str,
int num_patches) {
- int i;
uint8_t patch_sha1[SHA_DIGEST_SIZE];
- for (i = 0; i < num_patches; ++i) {
+ for (int i = 0; i < num_patches; ++i) {
if (ParseSha1(patch_sha1_str[i], patch_sha1) == 0 &&
memcmp(patch_sha1, sha1, SHA_DIGEST_SIZE) == 0) {
return i;
@@ -578,8 +562,8 @@ int FindMatchingPatch(uint8_t* sha1, char* const * const patch_sha1_str,
// Returns 0 if the contents of the file (argv[2]) or the cached file
// match any of the sha1's on the command line (argv[3:]). Returns
// nonzero otherwise.
-int applypatch_check(const char* filename,
- int num_patches, char** const patch_sha1_str) {
+int applypatch_check(const char* filename, int num_patches,
+ char** const patch_sha1_str) {
FileContents file;
file.data = NULL;
@@ -624,13 +608,13 @@ int ShowLicenses() {
}
ssize_t FileSink(const unsigned char* data, ssize_t len, void* token) {
- int fd = *(int *)token;
+ int fd = *reinterpret_cast<int *>(token);
ssize_t done = 0;
ssize_t wrote;
- while (done < (ssize_t) len) {
+ while (done < len) {
wrote = TEMP_FAILURE_RETRY(write(fd, data+done, len-done));
if (wrote == -1) {
- printf("error writing %d bytes: %s\n", (int)(len-done), strerror(errno));
+ printf("error writing %zd bytes: %s\n", (len-done), strerror(errno));
return done;
}
done += wrote;
@@ -645,7 +629,7 @@ typedef struct {
} MemorySinkInfo;
ssize_t MemorySink(const unsigned char* data, ssize_t len, void* token) {
- MemorySinkInfo* msi = (MemorySinkInfo*)token;
+ MemorySinkInfo* msi = reinterpret_cast<MemorySinkInfo*>(token);
if (msi->size - msi->pos < len) {
return -1;
}
@@ -675,9 +659,8 @@ int CacheSizeCheck(size_t bytes) {
}
static void print_short_sha1(const uint8_t sha1[SHA_DIGEST_SIZE]) {
- int i;
const char* hex = "0123456789abcdef";
- for (i = 0; i < 4; ++i) {
+ for (size_t i = 0; i < 4; ++i) {
putchar(hex[(sha1[i]>>4) & 0xf]);
putchar(hex[sha1[i] & 0xf]);
}
@@ -719,8 +702,7 @@ int applypatch(const char* source_filename,
Value* bonus_data) {
printf("patch %s: ", source_filename);
- if (target_filename[0] == '-' &&
- target_filename[1] == '\0') {
+ if (target_filename[0] == '-' && target_filename[1] == '\0') {
target_filename = source_filename;
}
@@ -761,8 +743,7 @@ int applypatch(const char* source_filename,
}
if (source_file.data != NULL) {
- int to_use = FindMatchingPatch(source_file.sha1,
- patch_sha1_str, num_patches);
+ int to_use = FindMatchingPatch(source_file.sha1, patch_sha1_str, num_patches);
if (to_use >= 0) {
source_patch_value = patch_data[to_use];
}
@@ -779,8 +760,7 @@ int applypatch(const char* source_filename,
return 1;
}
- int to_use = FindMatchingPatch(copy_file.sha1,
- patch_sha1_str, num_patches);
+ int to_use = FindMatchingPatch(copy_file.sha1, patch_sha1_str, num_patches);
if (to_use >= 0) {
copy_patch_value = patch_data[to_use];
}
@@ -865,8 +845,8 @@ static int GenerateTarget(FileContents* source_file,
(free_space > (256 << 10)) && // 256k (two-block) minimum
(free_space > (target_size * 3 / 2)); // 50% margin of error
if (!enough_space) {
- printf("target %ld bytes; free space %ld bytes; retry %d; enough %d\n",
- (long)target_size, (long)free_space, retry, enough_space);
+ printf("target %zu bytes; free space %zu bytes; retry %d; enough %d\n",
+ target_size, free_space, retry, enough_space);
}
}
@@ -884,8 +864,7 @@ static int GenerateTarget(FileContents* source_file,
// It's impossible to free space on the target filesystem by
// deleting the source if the source is a partition. If
// we're ever in a state where we need to do this, fail.
- printf("not enough free space for target but source "
- "is partition\n");
+ printf("not enough free space for target but source is partition\n");
return 1;
}
@@ -902,7 +881,7 @@ static int GenerateTarget(FileContents* source_file,
unlink(source_filename);
size_t free_space = FreeSpaceForFile(target_fs);
- printf("(now %ld bytes free for target) ", (long)free_space);
+ printf("(now %zu bytes free for target) ", free_space);
}
}
@@ -927,10 +906,9 @@ static int GenerateTarget(FileContents* source_file,
if (strncmp(target_filename, "MTD:", 4) == 0 ||
strncmp(target_filename, "EMMC:", 5) == 0) {
// We store the decoded output in memory.
- msi.buffer = malloc(target_size);
+ msi.buffer = reinterpret_cast<unsigned char*>(malloc(target_size));
if (msi.buffer == NULL) {
- printf("failed to alloc %ld bytes for output\n",
- (long)target_size);
+ printf("failed to alloc %zu bytes for output\n", target_size);
return 1;
}
msi.pos = 0;
@@ -939,12 +917,11 @@ static int GenerateTarget(FileContents* source_file,
token = &msi;
} else {
// We write the decoded output to "<tgt-file>.patch".
- outname = (char*)malloc(strlen(target_filename) + 10);
+ outname = reinterpret_cast<char*>(malloc(strlen(target_filename) + 10));
strcpy(outname, target_filename);
strcat(outname, ".patch");
- output = open(outname, O_WRONLY | O_CREAT | O_TRUNC | O_SYNC,
- S_IRUSR | S_IWUSR);
+ output = open(outname, O_WRONLY | O_CREAT | O_TRUNC | O_SYNC, S_IRUSR | S_IWUSR);
if (output < 0) {
printf("failed to open output file %s: %s\n",
outname, strerror(errno));
@@ -1025,23 +1002,23 @@ static int GenerateTarget(FileContents* source_file,
printf("chmod of \"%s\" failed: %s\n", outname, strerror(errno));
return 1;
}
- if (chown(outname, source_to_use->st.st_uid,
- source_to_use->st.st_gid) != 0) {
+ if (chown(outname, source_to_use->st.st_uid, source_to_use->st.st_gid) != 0) {
printf("chown of \"%s\" failed: %s\n", outname, strerror(errno));
return 1;
}
// Finally, rename the .patch file to replace the target file.
if (rename(outname, target_filename) != 0) {
- printf("rename of .patch to \"%s\" failed: %s\n",
- target_filename, strerror(errno));
+ printf("rename of .patch to \"%s\" failed: %s\n", target_filename, strerror(errno));
return 1;
}
}
// If this run of applypatch created the copy, and we're here, we
// can delete it.
- if (made_copy) unlink(CACHE_TEMP_SOURCE);
+ if (made_copy) {
+ unlink(CACHE_TEMP_SOURCE);
+ }
// Success!
return 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 17:13:06 +0200