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untar changed to allow deb_extract to extract to memory, allows better operation of dpkg-deb -f

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This commit is contained in:
Glenn L McGrath 2001-04-15 12:51:59 +00:00
parent a529d885d2
commit 685f5fd6f4
4 changed files with 51 additions and 41 deletions
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4
include/libbb.h
View File

@ -239,7 +239,9 @@ typedef enum extract_function_e {
extract_field = 128
} extract_function_t;
extern int deb_extract(const char *package_filename, int function, char *target_dir);
extern int untar(FILE *src_tar_file, const int untar_function, const char *argument);
extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, const char *argument);
extern char *read_text_file_to_buffer(FILE *src_file);
extern char *read_package_field(const char *package_buffer);
extern int unzip(FILE *l_in_file, FILE *l_out_file);
extern void gz_close(int gunzip_pid);

19
libbb/deb_extract.c
View File

@ -75,11 +75,24 @@ extern int deb_extract(const char *package_filename, int function, char *argumen
if (function & extract_fsys_tarfile) {
copy_file_chunk(uncompressed_file, stdout, -1);
} else {
untar(uncompressed_file, function, argument);
char *output_buffer = NULL;
output_buffer = untar(uncompressed_file, stdout, function, argument);
if (function & extract_field) {
char *field = NULL;
int field_length = 0;
int field_start = 0;
while ((field = read_package_field(&output_buffer[field_start])) != NULL) {
field_length = strlen(field);
field_start += (field_length + 1);
if (strstr(field, argument) == field) {
printf("%s\n", field + strlen(argument) + 2);
}
free(field);
}
}
}
/* we are deliberately terminating the child so we can safely ignore this */
gz_close(gunzip_pid);
gz_close(gunzip_pid);
fclose(deb_file);
fclose(uncompressed_file);
free(ared_file);

4
libbb/libbb.h
View File

@ -239,7 +239,9 @@ typedef enum extract_function_e {
extract_field = 128
} extract_function_t;
extern int deb_extract(const char *package_filename, int function, char *target_dir);
extern int untar(FILE *src_tar_file, const int untar_function, const char *argument);
extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, const char *argument);
extern char *read_text_file_to_buffer(FILE *src_file);
extern char *read_package_field(const char *package_buffer);
extern int unzip(FILE *l_in_file, FILE *l_out_file);
extern void gz_close(int gunzip_pid);

65
libbb/untar.c
View File

@ -22,7 +22,7 @@
#include <unistd.h>
#include "libbb.h"
extern int untar(FILE *src_tar_file, const int untar_function, const char *argument)
extern char *untar(FILE *src_tar_file, FILE *output, const int untar_function, const char *argument)
{
typedef struct raw_tar_header {
char name[100]; /* 0-99 */
@ -103,13 +103,12 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum
}
if (untar_function & (extract_contents | extract_verbose_extract)) {
printf("%s\n", raw_tar_header.name);
fprintf(output, "%s\n", raw_tar_header.name);
}
/* extract files */
if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) {
dir = xmalloc(strlen(raw_tar_header.name) + strlen(argument) + 2);
sprintf(dir, "%s/%s", argument, raw_tar_header.name);
dir = concat_path_file(argument, raw_tar_header.name);
create_path(dir, 0777);
}
@ -120,33 +119,27 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum
* supposed to be a directory, and fall through
*/
if (raw_tar_header.name[strlen(raw_tar_header.name)-1] != '/') {
if (untar_function & (extract_extract | extract_verbose_extract | extract_control)) {
FILE *dst_file = wfopen(dir, "w");
copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size);
uncompressed_count += size;
fclose(dst_file);
}
else if (untar_function & extract_info) {
if (strstr(raw_tar_header.name, argument) != NULL) {
copy_file_chunk(src_tar_file, stdout, (unsigned long long) size);
uncompressed_count += size;
}
}
else if (untar_function & extract_field) {
if (strstr(raw_tar_header.name, "./control") != NULL) {
char *line;
while ((line = get_line_from_file(src_tar_file)) != NULL) {
uncompressed_count += strlen(line);
if (argument == NULL) {
printf("%s",line);
}
else if (strncmp(line, argument, strlen(argument)) == 0) {
char *file_ptr;
file_ptr = strstr(line, ": ");
printf("%s", file_ptr + 2);
}
}
}
switch (untar_function) {
case (extract_extract):
case (extract_verbose_extract):
case (extract_control): {
FILE *dst_file = wfopen(dir, "w");
copy_file_chunk(src_tar_file, dst_file, (unsigned long long) size);
uncompressed_count += size;
fclose(dst_file);
}
break;
case (extract_info):
if (strstr(raw_tar_header.name, argument) != NULL) {
copy_file_chunk(src_tar_file, stdout, (unsigned long long) size);
uncompressed_count += size;
}
break;
case (extract_field):
if (strstr(raw_tar_header.name, "control") != NULL) {
return(read_text_file_to_buffer(src_tar_file));
}
break;
}
break;
}
@ -155,7 +148,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum
if (create_path(dir, mode) != TRUE) {
free(dir);
perror_msg("%s: Cannot mkdir", raw_tar_header.name);
return(EXIT_FAILURE);
return NULL;
}
}
break;
@ -164,7 +157,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum
if (link(raw_tar_header.linkname, raw_tar_header.name) < 0) {
free(dir);
perror_msg("%s: Cannot create hard link to '%s'", raw_tar_header.name, raw_tar_header.linkname);
return(EXIT_FAILURE);
return NULL;
}
}
break;
@ -173,7 +166,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum
if (symlink(raw_tar_header.linkname, raw_tar_header.name) < 0) {
free(dir);
perror_msg("%s: Cannot create symlink to '%s'", raw_tar_header.name, raw_tar_header.linkname);
return(EXIT_FAILURE);
return NULL;
}
}
break;
@ -186,7 +179,7 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum
default:
error_msg("Unknown file type '%c' in tar file", raw_tar_header.typeflag);
free(dir);
return(EXIT_FAILURE);
return NULL;
}
/*
@ -201,5 +194,5 @@ extern int untar(FILE *src_tar_file, const int untar_function, const char *argum
// free(dir);
}
return(EXIT_SUCCESS);
return NULL;
}