Fix lint errors

src/c_str.rs

@@ -184,7 +184,7 @@ impl fmt::Debug for CString {
 impl fmt::Debug for CStr {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f, "\"")?;
-        for byte in self.to_bytes().iter() {
+        for byte in self.to_bytes() {
             f.write_char(*byte as char)?;
         }
         write!(f, "\"")

src/calls/alarm.rs

@@ -26,5 +26,5 @@
 pub unsafe fn alarm(seconds: u32) -> u32 {
     let seconds = seconds as usize;
     // This function is always successful.
-    syscall1(SYS_ALARM, seconds).expect("alarm() failed") as u32
+    syscall1(SYS_ALARM, seconds).unwrap_or_default() as u32
 }

src/calls/getegid.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn getegid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETEGID).expect("getegid() failed") as gid_t
+    syscall0(SYS_GETEGID).unwrap_or_default() as gid_t
 }

src/calls/geteuid.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn geteuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETEUID).expect("geteuid() failed") as uid_t
+    syscall0(SYS_GETEUID).unwrap_or_default() as uid_t
 }

src/calls/getgid.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn getgid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETGID).expect("getgid() failed") as gid_t
+    syscall0(SYS_GETGID).unwrap_or_default() as gid_t
 }

src/calls/getpgrp.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn getpgrp() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPGRP).expect("getpgrp() failed") as pid_t
+    syscall0(SYS_GETPGRP).unwrap_or_default() as pid_t
 }

src/calls/getpid.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn getpid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETPID).unwrap_or_default() as pid_t
 }

src/calls/getppid.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn getppid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPPID).expect("getppid() failed") as pid_t
+    syscall0(SYS_GETPPID).unwrap_or_default() as pid_t
 }

src/calls/getsid.rs

@@ -11,5 +11,5 @@
 pub unsafe fn getsid(pid: pid_t) -> pid_t {
     let pid = pid as usize;
     // This function is always successful.
-    syscall1(SYS_GETSID, pid).expect("getsid() failed") as pid_t
+    syscall1(SYS_GETSID, pid).unwrap_or_default() as pid_t
 }

src/calls/gettid.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn gettid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETTID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETTID).unwrap_or_default() as pid_t
 }

src/calls/getuid.rs

@@ -9,5 +9,5 @@
 #[must_use]
 pub unsafe fn getuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETUID).expect("getuid() failed") as uid_t
+    syscall0(SYS_GETUID).unwrap_or_default() as uid_t
 }

src/platform/linux-aarch64/call.rs

@@ -1546,7 +1546,7 @@ pub unsafe fn getdents64(fd: i32, dirp: usize, count: size_t) -> Result<ssize_t,
 #[must_use]
 pub unsafe fn getegid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETEGID).expect("getegid() failed") as gid_t
+    syscall0(SYS_GETEGID).unwrap_or_default() as gid_t
 }
 
 /// Get the effective user ID of the calling process.
@@ -1560,7 +1560,7 @@ pub unsafe fn getegid() -> gid_t {
 #[must_use]
 pub unsafe fn geteuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETEUID).expect("geteuid() failed") as uid_t
+    syscall0(SYS_GETEUID).unwrap_or_default() as uid_t
 }
 
 /// Get the real group ID of the calling process.
@@ -1574,7 +1574,7 @@ pub unsafe fn geteuid() -> uid_t {
 #[must_use]
 pub unsafe fn getgid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETGID).expect("getgid() failed") as gid_t
+    syscall0(SYS_GETGID).unwrap_or_default() as gid_t
 }
 
 /// Get list of supplementary group Ids.
@@ -1690,7 +1690,7 @@ pub unsafe fn getpgid(pid: pid_t) -> Result<pid_t, Errno> {
 #[must_use]
 pub unsafe fn getpid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETPID).unwrap_or_default() as pid_t
 }
 
 /// Get the process ID of the parent of the calling process.
@@ -1704,7 +1704,7 @@ pub unsafe fn getpid() -> pid_t {
 #[must_use]
 pub unsafe fn getppid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPPID).expect("getppid() failed") as pid_t
+    syscall0(SYS_GETPPID).unwrap_or_default() as pid_t
 }
 
 /// Get program scheduling priority.
@@ -1834,7 +1834,7 @@ pub unsafe fn getrusage(who: i32, usage: &mut rusage_t) -> Result<(), Errno> {
 pub unsafe fn getsid(pid: pid_t) -> pid_t {
     let pid = pid as usize;
     // This function is always successful.
-    syscall1(SYS_GETSID, pid).expect("getsid() failed") as pid_t
+    syscall1(SYS_GETSID, pid).unwrap_or_default() as pid_t
 }
 
 /// Get current address to which the socket `sockfd` is bound.
@@ -1884,7 +1884,7 @@ pub unsafe fn getsockopt(
 #[must_use]
 pub unsafe fn gettid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETTID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETTID).unwrap_or_default() as pid_t
 }
 
 /// Get time.
@@ -1915,7 +1915,7 @@ pub unsafe fn gettimeofday(timeval: &mut timeval_t, tz: &mut timezone_t) -> Resu
 #[must_use]
 pub unsafe fn getuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETUID).expect("getuid() failed") as uid_t
+    syscall0(SYS_GETUID).unwrap_or_default() as uid_t
 }
 
 /// Get extended attribute value.

src/platform/linux-arm/call.rs

@@ -1940,7 +1940,7 @@ pub unsafe fn getdents64(fd: i32, dirp: usize, count: size_t) -> Result<ssize_t,
 #[must_use]
 pub unsafe fn getegid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETEGID).expect("getegid() failed") as gid_t
+    syscall0(SYS_GETEGID).unwrap_or_default() as gid_t
 }
 
 /// Get the effective user ID of the calling process.
@@ -1954,7 +1954,7 @@ pub unsafe fn getegid() -> gid_t {
 #[must_use]
 pub unsafe fn geteuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETEUID).expect("geteuid() failed") as uid_t
+    syscall0(SYS_GETEUID).unwrap_or_default() as uid_t
 }
 
 /// Get the real group ID of the calling process.
@@ -1968,7 +1968,7 @@ pub unsafe fn geteuid() -> uid_t {
 #[must_use]
 pub unsafe fn getgid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETGID).expect("getgid() failed") as gid_t
+    syscall0(SYS_GETGID).unwrap_or_default() as gid_t
 }
 
 /// Get list of supplementary group Ids.
@@ -2084,7 +2084,7 @@ pub unsafe fn getpgid(pid: pid_t) -> Result<pid_t, Errno> {
 #[must_use]
 pub unsafe fn getpgrp() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPGRP).expect("getpgrp() failed") as pid_t
+    syscall0(SYS_GETPGRP).unwrap_or_default() as pid_t
 }
 
 /// Get the process ID (PID) of the calling process.
@@ -2098,7 +2098,7 @@ pub unsafe fn getpgrp() -> pid_t {
 #[must_use]
 pub unsafe fn getpid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETPID).unwrap_or_default() as pid_t
 }
 
 /// Get the process ID of the parent of the calling process.
@@ -2112,7 +2112,7 @@ pub unsafe fn getpid() -> pid_t {
 #[must_use]
 pub unsafe fn getppid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPPID).expect("getppid() failed") as pid_t
+    syscall0(SYS_GETPPID).unwrap_or_default() as pid_t
 }
 
 /// Get program scheduling priority.
@@ -2225,7 +2225,7 @@ pub unsafe fn getrusage(who: i32, usage: &mut rusage_t) -> Result<(), Errno> {
 pub unsafe fn getsid(pid: pid_t) -> pid_t {
     let pid = pid as usize;
     // This function is always successful.
-    syscall1(SYS_GETSID, pid).expect("getsid() failed") as pid_t
+    syscall1(SYS_GETSID, pid).unwrap_or_default() as pid_t
 }
 
 /// Get current address to which the socket `sockfd` is bound.
@@ -2275,7 +2275,7 @@ pub unsafe fn getsockopt(
 #[must_use]
 pub unsafe fn gettid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETTID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETTID).unwrap_or_default() as pid_t
 }
 
 /// Get time.
@@ -2306,7 +2306,7 @@ pub unsafe fn gettimeofday(timeval: &mut timeval_t, tz: &mut timezone_t) -> Resu
 #[must_use]
 pub unsafe fn getuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETUID).expect("getuid() failed") as uid_t
+    syscall0(SYS_GETUID).unwrap_or_default() as uid_t
 }
 
 /// Get extended attribute value.

src/platform/linux-loongarch64/call.rs

@@ -1418,7 +1418,7 @@ pub unsafe fn getdents64(fd: i32, dirp: usize, count: size_t) -> Result<ssize_t,
 #[must_use]
 pub unsafe fn getegid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETEGID).expect("getegid() failed") as gid_t
+    syscall0(SYS_GETEGID).unwrap_or_default() as gid_t
 }
 
 /// Get the effective user ID of the calling process.
@@ -1432,7 +1432,7 @@ pub unsafe fn getegid() -> gid_t {
 #[must_use]
 pub unsafe fn geteuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETEUID).expect("geteuid() failed") as uid_t
+    syscall0(SYS_GETEUID).unwrap_or_default() as uid_t
 }
 
 /// Get the real group ID of the calling process.
@@ -1446,7 +1446,7 @@ pub unsafe fn geteuid() -> uid_t {
 #[must_use]
 pub unsafe fn getgid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETGID).expect("getgid() failed") as gid_t
+    syscall0(SYS_GETGID).unwrap_or_default() as gid_t
 }
 
 /// Get list of supplementary group Ids.
@@ -1562,7 +1562,7 @@ pub unsafe fn getpgid(pid: pid_t) -> Result<pid_t, Errno> {
 #[must_use]
 pub unsafe fn getpid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETPID).unwrap_or_default() as pid_t
 }
 
 /// Get the process ID of the parent of the calling process.
@@ -1576,7 +1576,7 @@ pub unsafe fn getpid() -> pid_t {
 #[must_use]
 pub unsafe fn getppid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPPID).expect("getppid() failed") as pid_t
+    syscall0(SYS_GETPPID).unwrap_or_default() as pid_t
 }
 
 /// Get program scheduling priority.
@@ -1706,7 +1706,7 @@ pub unsafe fn getrusage(who: i32, usage: &mut rusage_t) -> Result<(), Errno> {
 pub unsafe fn getsid(pid: pid_t) -> pid_t {
     let pid = pid as usize;
     // This function is always successful.
-    syscall1(SYS_GETSID, pid).expect("getsid() failed") as pid_t
+    syscall1(SYS_GETSID, pid).unwrap_or_default() as pid_t
 }
 
 /// Get current address to which the socket `sockfd` is bound.
@@ -1756,7 +1756,7 @@ pub unsafe fn getsockopt(
 #[must_use]
 pub unsafe fn gettid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETTID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETTID).unwrap_or_default() as pid_t
 }
 
 /// Get time.
@@ -1787,7 +1787,7 @@ pub unsafe fn gettimeofday(timeval: &mut timeval_t, tz: &mut timezone_t) -> Resu
 #[must_use]
 pub unsafe fn getuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETUID).expect("getuid() failed") as uid_t
+    syscall0(SYS_GETUID).unwrap_or_default() as uid_t
 }
 
 /// Get extended attribute value.

src/platform/linux-mips/call.rs

@@ -154,7 +154,7 @@ pub unsafe fn adjtimex(buf: &mut timex_t) -> Result<i32, Errno> {
 pub unsafe fn alarm(seconds: u32) -> u32 {
     let seconds = seconds as usize;
     // This function is always successful.
-    syscall1(SYS_ALARM, seconds).expect("alarm() failed") as u32
+    syscall1(SYS_ALARM, seconds).unwrap_or_default() as u32
 }
 
 /// Start, flush or tune buffer-dirty-flush daemon.
@@ -2003,7 +2003,7 @@ pub unsafe fn getdents64(fd: i32, dirp: usize, count: size_t) -> Result<ssize_t,
 #[must_use]
 pub unsafe fn getegid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETEGID).expect("getegid() failed") as gid_t
+    syscall0(SYS_GETEGID).unwrap_or_default() as gid_t
 }
 
 /// Get the effective user ID of the calling process.
@@ -2017,7 +2017,7 @@ pub unsafe fn getegid() -> gid_t {
 #[must_use]
 pub unsafe fn geteuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETEUID).expect("geteuid() failed") as uid_t
+    syscall0(SYS_GETEUID).unwrap_or_default() as uid_t
 }
 
 /// Get the real group ID of the calling process.
@@ -2031,7 +2031,7 @@ pub unsafe fn geteuid() -> uid_t {
 #[must_use]
 pub unsafe fn getgid() -> gid_t {
     // This function is always successful.
-    syscall0(SYS_GETGID).expect("getgid() failed") as gid_t
+    syscall0(SYS_GETGID).unwrap_or_default() as gid_t
 }
 
 /// Get list of supplementary group Ids.
@@ -2147,7 +2147,7 @@ pub unsafe fn getpgid(pid: pid_t) -> Result<pid_t, Errno> {
 #[must_use]
 pub unsafe fn getpgrp() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPGRP).expect("getpgrp() failed") as pid_t
+    syscall0(SYS_GETPGRP).unwrap_or_default() as pid_t
 }
 
 /// Get the process ID (PID) of the calling process.
@@ -2161,7 +2161,7 @@ pub unsafe fn getpgrp() -> pid_t {
 #[must_use]
 pub unsafe fn getpid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETPID).unwrap_or_default() as pid_t
 }
 
 /// Get the process ID of the parent of the calling process.
@@ -2175,7 +2175,7 @@ pub unsafe fn getpid() -> pid_t {
 #[must_use]
 pub unsafe fn getppid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETPPID).expect("getppid() failed") as pid_t
+    syscall0(SYS_GETPPID).unwrap_or_default() as pid_t
 }
 
 /// Get program scheduling priority.
@@ -2305,7 +2305,7 @@ pub unsafe fn getrusage(who: i32, usage: &mut rusage_t) -> Result<(), Errno> {
 pub unsafe fn getsid(pid: pid_t) -> pid_t {
     let pid = pid as usize;
     // This function is always successful.
-    syscall1(SYS_GETSID, pid).expect("getsid() failed") as pid_t
+    syscall1(SYS_GETSID, pid).unwrap_or_default() as pid_t
 }
 
 /// Get current address to which the socket `sockfd` is bound.
@@ -2355,7 +2355,7 @@ pub unsafe fn getsockopt(
 #[must_use]
 pub unsafe fn gettid() -> pid_t {
     // This function is always successful.
-    syscall0(SYS_GETTID).expect("getpid() failed") as pid_t
+    syscall0(SYS_GETTID).unwrap_or_default() as pid_t
 }
 
 /// Get time.
@@ -2386,7 +2386,7 @@ pub unsafe fn gettimeofday(timeval: &mut timeval_t, tz: &mut timezone_t) -> Resu
 #[must_use]
 pub unsafe fn getuid() -> uid_t {
     // This function is always successful.
-    syscall0(SYS_GETUID).expect("getuid() failed") as uid_t
+    syscall0(SYS_GETUID).unwrap_or_default() as uid_t
 }
 
 /// Get extended attribute value.