diff options
Diffstat (limited to 'man2/kcmp.2')
| -rw-r--r-- | man2/kcmp.2 | 30 |
1 files changed, 15 insertions, 15 deletions
diff --git a/man2/kcmp.2 b/man2/kcmp.2 index 7c02b5c44..d1c24130c 100644 --- a/man2/kcmp.2 +++ b/man2/kcmp.2 @@ -323,7 +323,7 @@ An example run of the program is as follows: $ \fB./a.out\fP Parent PID is 1144 Parent opened file on FD 3 - +\& PID of child of fork() is 1145 Compare duplicate FDs from different processes: kcmp(1145, 1144, KCMP_FILE, 3, 3) ==> same @@ -349,14 +349,14 @@ Child duplicated FD 3 to create FD 5 #include <sys/syscall.h> #include <sys/wait.h> #include <unistd.h> - +\& static int kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) { return syscall(SYS_kcmp, pid1, pid2, type, idx1, idx2); } - +\& static void test_kcmp(char *msg, pid_t pid1, pid_t pid2, int fd_a, int fd_b) { @@ -366,51 +366,51 @@ test_kcmp(char *msg, pid_t pid1, pid_t pid2, int fd_a, int fd_b) (kcmp(pid1, pid2, KCMP_FILE, fd_a, fd_b) == 0) ? "same" : "different"); } - +\& int main(void) { int fd1, fd2, fd3; static const char pathname[] = "/tmp/kcmp.test"; - +\& fd1 = open(pathname, O_CREAT | O_RDWR, 0600); if (fd1 == \-1) err(EXIT_FAILURE, "open"); - +\& printf("Parent PID is %jd\en", (intmax_t) getpid()); printf("Parent opened file on FD %d\en\en", fd1); - +\& switch (fork()) { case \-1: err(EXIT_FAILURE, "fork"); - +\& case 0: printf("PID of child of fork() is %jd\en", (intmax_t) getpid()); - +\& test_kcmp("Compare duplicate FDs from different processes:", getpid(), getppid(), fd1, fd1); - +\& fd2 = open(pathname, O_CREAT | O_RDWR, 0600); if (fd2 == \-1) err(EXIT_FAILURE, "open"); printf("Child opened file on FD %d\en", fd2); - +\& test_kcmp("Compare FDs from distinct open()s in same process:", getpid(), getpid(), fd1, fd2); - +\& fd3 = dup(fd1); if (fd3 == \-1) err(EXIT_FAILURE, "dup"); printf("Child duplicated FD %d to create FD %d\en", fd1, fd3); - +\& test_kcmp("Compare duplicated FDs in same process:", getpid(), getpid(), fd1, fd3); break; - +\& default: wait(NULL); } - +\& exit(EXIT_SUCCESS); } .EE |