chemacs.git/exec/exec.c, branch devmain

Revert "Don’t silently truncate file names in exec.c"

2026-05-25T03:21:00Z

This reverts commit 3461b450c5eae3ed53192aa9514e0b1ac1b1c8f2. Gnulib and intprops.h are not available from within the exec helper.

Don’t silently truncate file names in exec.c

2026-05-24T02:18:53Z

* exec/exec.c (format_pid): Simplify. No need for a local array. (exec_0): Shrink local buffer. If names are too long, fail instead of silently truncating them. Be cautious in case symlink is zero length (shouldn’t be possible in Android, but it’s easy to be safe).

; Add 2026 to copyright years.

2026-01-01T12:54:34Z

Port recent Android changes to mips64el

2025-04-15T08:17:14Z

* exec/config-mips.m4.in (DADDI2, DADDI3): Disable at-clobbering by assembler macros expressly. * exec/loader-mips64el.s: Adapt from loader-mipsel.s. * exec/configure.ac (exec_cv_as_daddi): Properly escape reg names. * exec/exec.c (struct exec_jump_command, exec_0): Don't define or set `fpu_mode' if __LP64__. * exec/exec.h (struct exec_tracee): New field `callno'. * exec/trace.c (process_system_call): Always record the current system call number in TRACEE lest it should be required once it has been overwritten upon the syscall's completion. (seccomp_system_call): Likewise. (after_fork): Clear `tracee->callno'.

Port recent changes to mipsel systems

2025-04-14T13:31:07Z

* exec/exec.c (exec_0): Don't disable AT_EXECFN substitution on MIPS systems. * exec/loader-aarch64.s (skip_environ): Correct typo in commentary. * exec/loader-mips64el.s: Add a disclaimer that this file is currently inoperable. * exec/loader-mipsel.s (__start): Move environment and argument vectors and produce and replace AT_EXECFN. Clear stack before proceeding to circumvent an oversight in glibc.

Replace AT_EXECFN in auxiliary vectors of programs executed on Android

2025-04-13T10:51:49Z

* exec/exec.c (insert_args, exec_0): On non-MIPS systems, copy NAME and its length to the loader area. State that MIPS support is not yet available (though it will be pending the availability of a functioning emulator). * exec/loader-aarch64.s (_start): * exec/loader-armeabi.s (_start): * exec/loader-x86.s (_start): * exec/loader-x86_64.s (_start): Displace auxv, environ, and argv to create sufficient space for the provided file name, and copy the file name there. Replace AT_EXECFN to refer to this space.

Update copyright year to 2025

2025-01-01T07:39:17Z

Run "TZ=UTC0 admin/update-copyright".

Fix some #! misparsing in check_interpreter

2024-09-17T23:39:25Z

* exec/exec.c: Do not include ctype.h, as the kernel does not care about the locale. (check_interpreter): Treat only spaces and tabs as white space. Do not inspect more bytes than were read. Although the resulting code does not exactly match what the Android kernel does, it’s closer than what it was before.

* exec/exec.c (exec_0): Restore erroneously deleted statement.

2024-07-01T14:55:03Z

Optimize process execution on Android

2024-07-01T10:11:58Z

* exec/configure.ac (REENTRANT): Remove option for reentrancy. (PROGRAM_COUNTER, HAVE_SECCOMP): Define register providing the program counter and enable seccomp if its headers are available. * exec/exec.c (write_load_command): Avoid defining unused variable. (exec_0): Remove code specific to REENTRANT configurations. * exec/exec.h (struct exec_tracee) : New fields for loader instructions and their size. * exec/exec1.c (main): Call exec_init before forking. * exec/mipsel-user.h (ELF_NGREG): Delete definition. (struct mipsel_regs): Reduce number of gregs to 32, but introduce separate fields for special registers. * exec/trace.c (use_seccomp_p): New variable; defile to false if !HAVE_SECCOMP. (remove_tracee): Cease providing for non-reentrant configurations. Release executable data if present. (handle_clone_prepare): Likewise. Resume process with PTRACE_CONT if seccomp-based interception is enabled. (handle_clone, check_signal): Resume processes as above. (handle_exec): Divide into two functions, with only rewriting the system call and generating instructions for the loader remaining in the first, and copying such instructions into the loader's stack removed into a new function, `finish_exec'. (finish_exec): New function. (handle_readlinkat, handle_openat): Abolish non-REENTRANT configurations. (process_system_call): Divide exec system calls into two phases, disambiguated by the value of tracee->waiting_for_syscall. Typo fixes. Accommodate syscall-exit-stops where the signal was initially intercepted by `seccomp_system_call'. (interesting_syscalls): New array. (ARRAYELTS): New macro. (seccomp_system_call, establish_seccomp_filter): New function. (tracing_execve) [HAVE_SECCOMP]: Establish a seccomp filter if this is to be enabled. (after_fork): Provide PTRACE_O_TRACESECCOMP. Resume process with PTRACE_CONT if seccomp-based interception is enabled. (exec_waitpid): Resume process with PTRACE_CONT if seccomp-based interception is enabled. Dispatch stops identifying as PTRACE_EVENT_SECCOMP to `seccomp_system_call'. (exec_init): Establish whether it is possible to enable seccomp.