| 1 | |
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| 2 | // RUN: %clang -O0 %s -o %t && %run %t |
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| 3 | |
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| 4 | #include <assert.h> |
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| 5 | #include <fcntl.h> |
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| 6 | #include <limits.h> |
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| 7 | #include <stdio.h> |
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| 8 | #include <string.h> |
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| 9 | #include <sys/types.h> |
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| 10 | #include <unistd.h> |
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| 11 | |
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| 12 | int main(int argc, char **argv) { |
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| 13 | char symlink_path[PATH_MAX]; |
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| 14 | snprintf(s: symlink_path, maxlen: sizeof(symlink_path), format: "%s_%d.symlink" , argv[0], |
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| 15 | getpid()); |
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| 16 | remove(filename: symlink_path); |
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| 17 | int res = symlink(from: argv[0], to: symlink_path); |
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| 18 | assert(!res); |
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| 19 | |
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| 20 | int fd; |
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| 21 | char readlink_path[PATH_MAX]; |
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| 22 | fd = open(symlink_path, O_RDONLY | O_SYMLINK); |
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| 23 | assert(fd > 0); |
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| 24 | ssize_t res2 = freadlink(fd, readlink_path, sizeof(readlink_path)); |
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| 25 | assert(res2 >= 0); |
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| 26 | readlink_path[res2] = '\0'; |
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| 27 | assert(!strcmp(readlink_path, argv[0])); |
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| 28 | close(fd: fd); |
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| 29 | |
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| 30 | return 0; |
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| 31 | } |
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| 32 | |
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