79 lines
2.7 KiB
C
79 lines
2.7 KiB
C
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/*
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* Copyright (c) 2022
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* MP support header */
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#include "MacportsLegacySupport.h"
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/* copyfile and its associated functions wrap */
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#if __MP_LEGACY_SUPPORT_COPYFILE_WRAP__
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#include <stdlib.h>
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#include <dlfcn.h>
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#include <sys/stat.h>
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#include <copyfile.h>
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int copyfile_state_get(copyfile_state_t s, uint32_t flag, void * dst)
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{
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int (*real_copyfile_state_get)(copyfile_state_t s, uint32_t flag, void * dst);
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int ret;
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char *file_name;
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int file_descriptor;
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struct stat file_stat;
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real_copyfile_state_get = dlsym(RTLD_NEXT, "copyfile_state_get");
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if (real_copyfile_state_get == NULL) {
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exit(EXIT_FAILURE);
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}
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switch(flag)
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{
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case COPYFILE_STATE_COPIED:
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/* since copyfile did not recored how many bytes were copied, return the size of the destination file */
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/* first check if the file descriptor has been set */
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ret = real_copyfile_state_get(s, COPYFILE_STATE_DST_FD, &file_descriptor);
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if ( ret < 0 ) {
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return ret;
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}
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if ( file_descriptor != -2 ) {
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ret = fstat(file_descriptor, &file_stat);
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return ret;
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} else {
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/* the file descriptor was not set, so check the file name */
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ret = real_copyfile_state_get(s, COPYFILE_STATE_DST_FILENAME, &file_name);
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if ( ret < 0 ) {
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return ret;
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}
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if ( file_name == NULL ) {
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/* neither the file descriptor nor the file name has been set */
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return real_copyfile_state_get(s, flag, dst);
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}
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ret = stat(file_name, &file_stat);
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}
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*(off_t*)dst = file_stat.st_size;
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return 0;
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break;
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case COPYFILE_STATE_STATUS_CB:
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case COPYFILE_STATE_STATUS_CTX:
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/* copyfile did not run the callback function, so return default (which is an error) */
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default:
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return real_copyfile_state_get(s, flag, dst);
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}
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return 0;
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}
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#endif /* __MP_LEGACY_SUPPORT_COPYFILE_WRAP__ */
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