\u043f\u0440\u043e\u0433\u0440\u0430\u043c\u043c\u0430<\/a><\/noindex>, \u043f\u0438\u0448\u0443\u0449\u0430\u044f \u0434\u0432\u0435 \u0441\u0442\u0440\u043e\u043a\u0438 \u0432 \u043f\u043e\u0442\u043e\u043a \u0432\u044b\u0432\u043e\u0434\u0430:<\/p>\n<\/p>\n
#include <unistd.h>\n#include <stdio.h>\n#include <stdlib.h>\n\nvoid do_write(const char *str, ssize_t len)\n{\n if (len != write(STDOUT_FILENO, str, (size_t)len)){\n perror("write");\n exit(EXIT_FAILURE);\n }\n}\n\nint main(int argc, char *argv[])\n{\n (void) argc; (void) argv;\n\n char str1[] = "write me 1n";\n do_write(str1, sizeof(str1));\n\n char str2[] = "write me 2n";\n do_write(str2, sizeof(str2));\n\n return EXIT_SUCCESS;\n}<\/code><\/pre>\n<\/p>\n
\u041e\u0442\u0441\u043b\u0435\u0436\u0438\u0432\u0430\u0435\u043c \u043e\u0431\u0430 \u0432\u044b\u0437\u043e\u0432\u0430 write:<\/p>\n
<\/p>\n
$ gcc examples\/write-twice.c -o write-twice\n$ .\/write-twice\nwrite me 1\nwrite me 2\n$ strace -e trace=write -owrite-twice.log .\/write-twice\nwrite me 1\nwrite me 2\n$ cat write-twice.log\nwrite(1, "write me 1n\u0000", 12) = 12\nwrite(1, "write me 2n\u0000", 12) = 12\n+++ exited with 0 +++<\/code><\/pre>\n<\/p>\n
\u0410 \u0442\u0435\u043f\u0435\u0440\u044c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u0443\u0435\u043c \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u0435 inject<\/code>, \u0447\u0442\u043e\u0431\u044b \u0432\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u043e\u0448\u0438\u0431\u043a\u0443 EBADF<\/code> \u0432\u043e \u0432\u0441\u0435 \u0432\u044b\u0437\u043e\u0432\u044b write:<\/p>\n<\/p>\n
$ strace -e trace=write -e inject=write:error=EBADF -owrite-twice.log .\/write-twice\n$ cat write-twice.log\nwrite(1, "write me 1n\u0000", 12) = -1 EBADF (Bad file descriptor) (INJECTED)\nwrite(3, "write: Bad file descriptorn", 27) = -1 EBADF (Bad file descriptor) (INJECTED)\n+++ exited with 1 +++<\/code><\/pre>\n<\/p>\n
\u0418\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e, \u0447\u0442\u043e \u043e\u0448\u0438\u0431\u043a\u0438 \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u044e\u0442 \u0432\u0441\u0435<\/strong> \u0432\u044b\u0437\u043e\u0432\u044b write<\/code>, \u0432\u043a\u043b\u044e\u0447\u0430\u044f \u0432\u044b\u0437\u043e\u0432, \u0441\u043a\u0440\u044b\u0442\u044b\u0439 \u0437\u0430 perror. \u0418\u043c\u0435\u0435\u0442 \u0441\u043c\u044b\u0441\u043b \u0432\u043e\u0437\u0432\u0440\u0430\u0449\u0430\u0442\u044c \u043e\u0448\u0438\u0431\u043a\u0443 \u0442\u043e\u043b\u044c\u043a\u043e \u0434\u043b\u044f \u043f\u0435\u0440\u0432\u043e\u0433\u043e \u0438\u0437 \u0432\u044b\u0437\u043e\u0432\u043e\u0432:<\/p>\n<\/p>\n
$ strace -e trace=write -e inject=write:error=EBADF:when=1 -owrite-twice.log .\/write-twice\nwrite: Bad file descriptor\n$ cat write-twice.log\nwrite(1, "write me 1n\u0000", 12) = -1 EBADF (Bad file descriptor) (INJECTED)\nwrite(3, "write: Bad file descriptorn", 27) = 27\n+++ exited with 1 +++<\/code><\/pre>\n<\/p>\n
\u0418\u043b\u0438 \u0432\u0442\u043e\u0440\u043e\u0433\u043e:<\/p>\n
<\/p>\n
$ strace -e trace=write -e inject=write:error=EBADF:when=2 -owrite-twice.log .\/write-twice\nwrite me 1\nwrite: Bad file descriptor\n$ cat write-twice.log\nwrite(1, "write me 1n\u0000", 12) = 12\nwrite(1, "write me 2n\u0000", 12) = -1 EBADF (Bad file descriptor) (INJECTED)\nwrite(3, "write: Bad file descriptorn", 27) = 27\n+++ exited with 1 +++<\/code><\/pre>\n<\/p>\n
\u0422\u0438\u043f \u043e\u0448\u0438\u0431\u043a\u0438 \u0443\u043a\u0430\u0437\u044b\u0432\u0430\u0442\u044c \u043d\u0435 \u043e\u0431\u044f\u0437\u0430\u0442\u0435\u043b\u044c\u043d\u043e:<\/p>\n
<\/p>\n
$ strace -e trace=write -e fault=write:when=1 -owrite-twice.log .\/write-twice\n$ cat write-twice.log\nwrite(1, "write me 1n\u0000", 12) = -1 ENOSYS (Function not implemented) (INJECTED)\nwrite(3, "write: Function not implementedn", 32) = 32\n+++ exited with 1 +++<\/code><\/pre>\n<\/p>\n
\u0412 \u0441\u043e\u0447\u0435\u0442\u0430\u043d\u0438\u0438 \u0441 \u0434\u0440\u0443\u0433\u0438\u043c\u0438 \u0444\u043b\u0430\u0433\u0430\u043c\u0438 \u043c\u043e\u0436\u043d\u043e \u00ab\u043b\u043e\u043c\u0430\u0442\u044c\u00bb \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044f \u043a \u043a\u043e\u043d\u043a\u0440\u0435\u0442\u043d\u043e\u043c\u0443 \u0444\u0430\u0439\u043b\u0443. \u041f\u0440\u0438\u043c\u0435\u0440:<\/p>\n
<\/p>\n
$ strace -y -P\/tmp\/test_file.log -e inject=file:error=ENOENT -o write-file.log .\/write-file \/tmp\/test_file.log\nopen: No such file or directory\n$ cat write-file.log\nopenat(AT_FDCWD, "\/tmp\/test_file.log", O_WRONLY|O_APPEND) = -1 ENOENT (No such file or directory) (INJECTED)\n+++ exited with 1 +++<\/code><\/pre>\n<\/p>\n
\u041f\u043e\u043c\u0438\u043c\u043e \u0438\u043d\u044a\u0435\u043a\u0446\u0438\u0439 \u043e\u0448\u0438\u0431\u043e\u043a,
![\"Strace](\"\/wp-content\/uploads\/2020\/03\/d34dbc0574850a7a8b3bb4896a121c75.jpg\")
<\/p>\n