{"record":{"id":"9eed3715588777f4","repo":"DrKLO/Telegram","slug":"error-opening-input-file-s-n","errorCode":null,"errorMessage":"Error opening input file: %s\\n","messagePattern":"Error opening input file: (.+?)\\\\n","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"TMessagesProj/jni/opus/src/repacketizer_demo.c","lineNumber":102,"sourceCode":"         if(merge>48)\n         {\n            fprintf(stderr, \"-merge parameter must be less than 48.\\n\");\n            return EXIT_FAILURE;\n         }\n         i++;\n      } else if (strcmp(argv[i], \"-split\")==0)\n         split = 1;\n      else\n      {\n         fprintf(stderr, \"Unknown option: %s\\n\", argv[i]);\n         usage(argv[0]);\n         return EXIT_FAILURE;\n      }\n   }\n   fin = fopen(argv[argc-2], \"r\");\n   if(fin==NULL)\n   {\n     fprintf(stderr, \"Error opening input file: %s\\n\", argv[argc-2]);\n     return EXIT_FAILURE;\n   }\n   fout = fopen(argv[argc-1], \"w\");\n   if(fout==NULL)\n   {\n     fprintf(stderr, \"Error opening output file: %s\\n\", argv[argc-1]);\n     fclose(fin);\n     return EXIT_FAILURE;\n   }\n\n   rp = opus_repacketizer_create();\n   while (!eof)\n   {\n      int err;\n      int nb_packets=merge;\n      opus_repacketizer_init(rp);\n      for (i=0;i<nb_packets;i++)\n      {","sourceCodeStart":84,"sourceCodeEnd":120,"githubUrl":"https://github.com/DrKLO/Telegram/blob/45ab8f4308496e1f01026a97fcdb0d58a5274474/TMessagesProj/jni/opus/src/repacketizer_demo.c#L84-L120","documentation":"fopen(argv[argc-2], \"r\") on the input file returned NULL. The input file is expected to be a binary file containing length-prefixed Opus packets (4-byte big-endian length, 4-byte range-state, then payload bytes). A NULL return from fopen means the file does not exist, is not readable by the current user, or the path resolves to a directory.","triggerScenarios":"Non-existent file path; permission denied (file owned by another user, no read permission); path is a directory; typo in filename; relative path resolved from the wrong working directory.","commonSituations":"Wrong working directory when using relative paths; file generated by a prior pipeline step that failed silently; NFS or mount issues; filename with spaces not properly quoted.","solutions":["Verify the input file exists and is readable: `ls -l <path>` or `test -r <path>`.","Use an absolute path to avoid working-directory ambiguity.","Quote paths containing spaces.","Check that the file-generating step (e.g., opus_demo or a custom encoder) completed successfully before invoking repacketizer_demo."],"exampleFix":"// before\nrepacketizer_demo -merge 2 ./out/packets.oct /tmp/result.oct\n// after\nrepacketizer_demo -merge 2 /abs/path/to/packets.oct /tmp/result.oct","handlingStrategy":"validation","validationCode":"// Pre-check input file accessibility\n#include <unistd.h>\nif (access(argv[argc-2], R_OK) != 0) {\n    fprintf(stderr, \"Input file not readable: %s\\n\", argv[argc-2]);\n    return EXIT_FAILURE;\n}","typeGuard":null,"tryCatchPattern":null,"preventionTips":["Use absolute paths for input files in scripts.","Verify file existence with `test -f` or `access()` before invoking the tool.","Check that the file-generating pipeline step succeeded."],"tags":["opus","cli","file-io","input-validation","repacketizer"],"backgroundTag":null,"analyzedSha":"45ab8f4308496e1f01026a97fcdb0d58a5274474","analyzedAt":"2026-08-14T05:19:30.815Z","schemaVersion":2},"datasetVersion":"2026-08-14T10:17:34.591Z"}