Provided by: libexplain-dev_1.4.D001-8_amd64 bug

NAME

       libexplain - Explain errno values returned by libc functions

SYNOPSIS

       cc ... -lexplain;

       #include <libexplain/libexplain.h>

DESCRIPTION

       The libexplain library exists to give explanations of error reported by system calls.  The
       error message returned by strerror(3) tend to be quite cryptic.  By providing  a  specific
       error  report  for  each  system  call, a more detailed error message is possible, usually
       identifying and describing the specific cause from  amongst  the  numerous  meanings  each
       errno value maps to.

   Race Condition
       The  explanation  of the cause of an error is dependent on the environment of the error to
       remain unchanged, so that when libexplain gets around to looking for the cause, the  cause
       is  still  there.   On a running system, and particularly a multi‐user system, this is not
       always possible.

       If an incorrect explanation is provided, it is  possible  that  the  cause  is  no  longer
       present.

   Compiling
       Assuming  the  library  header files has been installed into /usr/include, and the library
       files have been installed into /usr/lib, compiling against libexplain requires no  special
       -I options.

       When  linking your pograms, add -lexplain to the list of libraries at the end of your link
       line.
              cc ... -lexplain

       When you configure your package with GNU Autoconf, you need the large file support macro
              AC_SYS_LARGEFILE

       If you aren't using GNU Autoconf, you will have to work out the needed large file  support
       requirements yourdelf.

       There is a pkg‐config(1) package for you to use, too:
              CFLAGS="$CFLAGS   `pkg-config   libexplain   --cflags`"   LIBS="$LIBS   `pkg-config
              libexplain --libs`"
       This can make figuring out the command line requirements much easier.

   Environment Variable
       The EXPLAIN_OPTIONS environment variable may be used to control some of the content in the
       messages.  Options are separated by comma (“,”) characters.

       There are three ways to set an option:

       1. The  form  “name=value” may be used explicitly.  The values “true” and “false” are used
          for boolean options.

       2. An option name alone is interpreted to mean “name=true”.

       3. The form “no‐name” is interpreted to mean “name=false”.

       The following options are available:

       debug   Additional debugging messages for libexplain developers.  Not generally useful  to
               clients of the library.
               Default: false.

       extra‐device‐info
               Additional  information  for  block  and character special devices is printed when
               naming a file and its type.
               Default: true

       numeric‐errno
               This option includes the numeric errno value in the message,  e.g.  “(2,  ENOENT)”
               rather  than  “(ENOENT)”.   Disabling this option is generally of use in automated
               testing, to prevent UNIX dialect differences from producing false negatives.
               Default: true

       dialect‐specific
               This controls the presence of explanatory  text  specific  to  a  particular  UNIX
               dialect.   It  also  suppresses printing system specific maximums.  Disabling this
               option is  generally  of  use  in  automated  testing,  to  prevent  UNIX  dialect
               differences from producing false negatives.
               Default: true.

       hanging‐indent
               This  controls  the  hanging  indent  depth  used  for error message wrapping.  By
               default no hanging indent is used, but this can sometimes obfuscate the end of one
               error  message  and  the  beginning  of  another.   A  hanging  indent  results in
               continuation lines starting with white spoace, similar to RFC822 headers.  A value
               of  0  means no hanging indent (all lines flush with left margin).  A common value
               to use is 4: it doesn't consume to much of each line, and it is  a  clear  indent.
               The   program   may   choose  to  override  the  environment  variable  using  the
               explain_option_hanging_indent_set(3) function.  The hanging indent is  limited  to
               10% of the terminal width.
               Default: 0

       internal‐strerror
               This  option  controls the source of system eror message texts.  If false, it uses
               strerorP(3) for the text.  If true, it uses internal string for the text.  This is
               mostly  of  use  for  automated  testing,  to  avoid  false  negatives  induced by
               inconsistencies across Unix implementations.
               Default: false.

       program‐name
               This option controls the inclusion of the program  name  at  the  start  of  error
               messages,  by  the  explain_*_or_die and explain_*_on_error functions.  This helps
               users understand which command is throwing the error.  Disabling this  option  may
               be   of  some  interest  to  script  writers.   Program  developers  can  use  the
               explain_program_name_set(3) function to set the name of the command, if they  wish
               to  override  the  name  that libexplain would otherwise obtain from the operating
               system.  Program developers can use the explain_program_name_assemble(3)  function
               to trump this option.
               Default: true.

       symbolic‐mode‐bits
               This  option  controls how permission mode bits are represented in error messages.
               Setting this option to true will cause symbolic names to be printed (e.g.  S_IRUSR
               |  S_IWUSR  |  S_IRGRP  | S_IROTH).  Setting this option to false will cause octal
               values to be printed (e.g. 0644).
               Default: false.

Supported System Calls

       Each supported system call has its own man page.

       explain_accept(3)
               Explain accept(2) errors

       explain_accept_or_die(3)
               accept a connection on a socket and report errors

       explain_accept4(3)
               Explain accept4(2) errors

       explain_accept4_or_die(3)
               accept a connection on a socket and report errors

       explain_access(3)
               Explain access(2) errors

       explain_access_or_die(3)
               check permissions for a file and report errors

       explain_acct(3)
               Explain acct(2) errors

       explain_acct_or_die(3)
               process accounting control and report errors

       explain_acl_from_text(3)
               Explain acl_from_text(3) errors

       explain_acl_from_text_or_die(3)
               create an ACL from text and report errors

       explain_acl_get_fd(3)
               Explain acl_get_fd(3) errors

       explain_acl_get_fd_or_die(3)
               Execute acl_get_fd(3) and report errors

       explain_acl_get_file(3)
               Explain acl_get_file(3) errors

       explain_acl_get_file_or_die(3)
               Execute acl_get_file(3) and report errors

       explain_acl_set_fd(3)
               Explain acl_set_fd(3) errors

       explain_acl_set_fd_or_die(3)
               set an ACL by file descriptor and report errors

       explain_acl_set_file(3)
               Explain acl_set_file(3) errors

       explain_acl_set_file_or_die(3)
               set an ACL by filename and report errors

       explain_acl_to_text(3)
               Explain acl_to_text(3) errors

       explain_acl_to_text_or_die(3)
               convert an ACL to text and report errors

       explain_adjtime(3)
               Explain adjtime(2) errors

       explain_adjtime_or_die(3)
               smoothly tune kernel clock and report errors

       explain_adjtimex(3)
               Explain adjtimex(2) errors

       explain_adjtimex_or_die(3)
               tune kernel clock and report errors

       explain_asprintf(3)
               Explain asprintf(3) errors

       explain_asprintf_or_die(3)
               print to allocated string and report errors

       explain_bind(3)
               Explain bind(2) errors

       explain_bind_or_die(3)
               bind a name to a socket and report errors

       explain_calloc(3)
               Explain calloc(3) errors

       explain_calloc_or_die(3)
               Allocate and clear memory and report errors

       explain_chdir(3)
               Explain chdir(2) errors

       explain_chdir_or_die(3)
               change working directory and report errors

       explain_chmod(3)
               Explain chmod(2) errors

       explain_chmod_or_die(3)
               change permissions of a file and report errors

       explain_chown(3)
               Explain chown errors

       explain_chown_or_die(3)
               change ownership of a file and report errors

       explain_chroot(3)
               Explain chroot(2) errors

       explain_chroot_or_die(3)
               change root directory and report errors

       explain_close(3)
               Explain close(2) errors

       explain_close_or_die(3)
               close a file descriptor and report errors

       explain_closedir(3)
               Explain closedir(3) errors

       explain_closedir_or_die(3)
               close a directory and report errors

       explain_connect(3)
               Explain connect(2) errors

       explain_connect_or_die(3)
               initiate a connection on a socket and report errors

       explain_creat(3)
               Explain creat(2) errors

       explain_creat_or_die(3)
               create and open a file and report errors

       explain_dirfd(3)
               Explain dirfd(3) errors

       explain_dirfd_or_die(3)
               get directory stream file descriptor and report errors

       explain_dup(3)
               Explain dup(2) errors

       explain_dup_or_die(3)
               duplicate a file descriptor and report errors

       explain_dup2(3)
               Explain dup2(2) errors

       explain_dup2_or_die(3)
               duplicate a file descriptor and report errors

       explain_endgrent(3)
               Explain endgrent(3) errors

       explain_endgrent_or_die(3)
               finish group file accesses and report errors

       explain_eventfd(3)
               Explain eventfd(2) errors

       explain_eventfd_or_die(3)
               create a file descriptor for event notification and report errors

       explain_execlp(3)
               Explain execlp(3) errors

       explain_execlp_or_die(3)
               execute a file and report errors

       explain_execv(3)
               Explain execv(3) errors

       explain_execv_or_die(3)
               execute a file and report errors

       explain_execve(3)
               Explain execve(2) errors

       explain_execve_or_die(3)
               execute program and report errors

       explain_execvp(3)
               Explain execvp(3) errors

       explain_execvp_or_die(3)
               execute program and report errors

       explain_exit(3)
               print an explanation of exit status before exiting

       explain_fchdir(3)
               Explain fchdir(2) errors

       explain_fchmod(3)
               Explain fchmod(2) errors

       explain_fchmod_or_die(3)
               change permissions of an open file and report errors

       explain_fchown(3)
               Explain fchown(2) errors

       explain_fchown_or_die(3)
               change ownership of a file and report errors

       explain_fchownat(3)
               Explain fchownat(2) errors

       explain_fchownat_or_die(3)
               change ownership of a file relative to a directory and report errors

       explain_fclose(3)
               Explain fclose(2) errors

       explain_fclose_or_die(3)
               close a stream and report errors

       explain_fcntl(3)
               Explain fcntl(2) errors

       explain_fcntl_or_die(3)
               Manipulate a file descriptor and report errors

       explain_fdopen(3)
               Explain fdopen(3) errors

       explain_fdopen_or_die(3)
               stream open function and report errors

       explain_fdopendir(3)
               Explain fdopendir(3) errors

       explain_fdopendir_or_die(3)
               open a directory and report errors

       explain_feof(3)
               Explain feof(3) errors

       explain_feof_or_die(3)
               check and reset stream status and report errors

       explain_ferror(3)
               Explain ferror(3) errors

       explain_ferror_or_die(3)
               check stream status and report errors

       explain_fflush(3)
               Explain fflush(3) errors

       explain_fflush_or_die(3)
               flush a stream and report errors

       explain_fgetc(3)
               Explain fgetc(3) errors

       explain_fgetc_or_die(3)
               input of characters and report errors

       explain_fgetpos(3)
               Explain fgetpos(3) errors

       explain_fgetpos_or_die(3)
               reposition a stream and report errors

       explain_fgets(3)
               Explain fgets(3) errors

       explain_fgets_or_die(3)
               input of strings and report errors

       explain_fileno(3)
               Explain fileno(3) errors

       explain_fileno_or_die(3)
               check and reset stream status and report errors

       explain_flock(3)
               Explain flock(2) errors

       explain_flock_or_die(3)
               apply or remove an advisory lock on an open file and report errors

       explain_fopen(3)
               Explain fopen(3) errors

       explain_fopen_or_die(2)
               open files and report errors

       explain_fork(3)
               Explain fork(2) errors

       explain_fork_or_die(3)
               create a child process and report errors

       explain_fpathconf(3)
               Explain fpathconf(3) errors

       explain_fpathconf_or_die(3)
               get configuration values for files and report errors

       explain_fprintf(3)
               Explain fprintf(3) errors

       explain_fprintf_or_die(3)
               formatted output conversion and report errors

       explain_fpurge(3)
               Explain fpurge(3) errors

       explain_fpurge_or_die(3)
               purge a stream and report errors

       explain_fputc(3)
               Explain fputc(3) errors

       explain_fputc_or_die(3)
               output of characters and report errors

       explain_fputs(3)
               Explain fputs(3) errors

       explain_fputs_or_die(3)
               write a string to a stream and report errors

       explain_fread(3)
               Explain fread(3) errors

       explain_fread_or_die(3)
               binary stream input and report errors

       explain_freopen(3)
               Explain freopen(3) errors

       explain_freopen_or_die(3)
               open files and report errors

       explain_fseek(3)
               Explain fseek(3) errors

       explain_fseek_or_die(3)
               reposition a stream and report errors

       explain_fseeko(3)
               Explain fseeko(3) errors

       explain_fseeko_or_die(3)
               seek to or report file position and report errors

       explain_fsetpos(3)
               Explain fsetpos(3) errors

       explain_fsetpos_or_die(3)
               reposition a stream and report errors

       explain_fstat(3)
               Explain fstat(3) errors

       explain_fstat_or_die(3)
               get file status and report errors

       explain_fstatat(3)
               Explain fstatat(2) errors

       explain_fstatat_or_die(3)
               get file status relative to a directory file descriptor and report errors

       explain_fstatfs(3)
               Explain fstatfs(2) errors

       explain_fstatfs_or_die(3)
               get file system statistics and report errors

       explain_fstatvfs(3)
               Explain fstatvfs(2) errors

       explain_fstatvfs_or_die(3)
               get file system statistics and report errors

       explain_fsync(3)
               Explain fsync(2) errors

       explain_fsync_or_die(3)
               synchronize a file's in‐core state with storage device and report errors

       explain_ftell(3)
               Explain ftell(3) errors

       explain_ftell_or_die(3)
               get stream position and report errors

       explain_ftello(3)
               Explain ftello(3) errors

       explain_ftello_or_die(3)
               get stream position and report errors

       explain_ftime(3)
               Explain ftime(3) errors

       explain_ftime_or_die(3)
               return date and time and report errors

       explain_ftruncate(3)
               Explain ftruncate(2) errors

       explain_ftruncate_or_die(3)
               truncate a file to a specified length and report errors

       explain_futimens(3)
               Explain futimens(3) errors

       explain_futimens_or_die(3)
               change file timestamps with nanosecond precision and report errors

       explain_futimes(3)
               Explain futimes(3) errors

       explain_futimes_or_die(3)
               Execute futimes(3) and report errors

       explain_futimesat(3)
               Explain futimesat(2) errors

       explain_futimesat_or_die(3)
               change timestamps of a file relative to a directory  and report errors

       explain_fwrite(3)
               Explain fwrite(3) errors

       explain_fwrite_or_die(3)
               binary stream output and report errors

       explain_futimesat(3)
               Explain futimesat(2) errors

       explain_futimesat_or_die(3)
               change timestamps of a file relative to a directory  and report errors

       explain_getaddrinfo(3)
               Explain getaddrinfo(3) errors

       explain_getaddrinfo_or_die(3)
               network address and and report errors

       explain_getc(3)
               Explain getc(3) errors

       explain_getc_or_die(3)
               input of characters and report errors

       explain_getchar(3)
               Explain getchar(3) errors

       explain_getchar_or_die(3)
               input of characters and report errors

       explain_getcwd(3)
               Explain getcwd(2) errors

       explain_getdomainname(3)
               Explain getdomainname(2) errors

       explain_getdomainname_or_die(3)
               get domain name and report errors

       explain_getgrent(3)
               Explain getgrent(3) errors

       explain_getgrent_or_die(3)
               get group file entry and report errors

       explain_getgrouplist(3)
               Explain getgrouplist(3) errors

       explain_getgrouplist_or_die(3)
               get list of groups to which a user belongs and report errors

       explain_getgroups(3)
               Explain getgroups(2) errors

       explain_getgroups_or_die(3)
               get list of supplementary group IDs and report errors

       explain_getcwd_or_die(3)
               Get current working directory and report errors

       explain_gethostbyname(3)
               Explain gethostbyname(3) errors

       explain_gethostbyname_or_die(3)
               get host address given host name and report errors

       explain_gethostid(3)
               Explain gethostid(3) errors

       explain_gethostid_or_die(3)
               get the unique identifier of the current host and report errors

       explain_gethostname(3)
               Explain gethostname(2) errors

       explain_gethostname_or_die(3)
               get hostname and report errors

       explain_getpeername(3)
               Explain getpeername(2) errors

       explain_getpeername_or_die(3)
               Executegetpeername(2) and report errors

       explain_getpgid(3)
               Explain getpgid(2) errors

       explain_getpgid_or_die(3)
               get process group and report errors

       explain_getpgrp(3)
               Explain getpgrp(2) errors

       explain_getpgrp_or_die(3)
               get process group and report errors

       explain_getpriority(3)
               Explain getpriority(2) errors

       explain_getpriority_or_die(3)
               get program scheduling priority and report errors

       explain_getresgid(3)
               Explain getresgid(2) errors

       explain_getresgid_or_die(3)
               get real, effective and saved group IDs and report errors

       explain_getresuid(3)
               Explain getresuid(2) errors

       explain_getresuid_or_die(3)
               get real, effective and saved user IDs and report errors

       explain_getrlimit(3)
               Explain getrlimit(2) errors

       explain_getrlimit_or_die(3)
               get resource limits and report errors

       explain_getrusage(3)
               Explain getrusage(2) errors

       explain_getrusage_or_die(3)
               get resource usage and report errors

       explain_getsockname(3)
               Explain getsockname(2) errors

       explain_getsockname_or_die(3)
               Execute getsockname(2) and report errors

       explain_getsockopt(3)
               Explain getsockopt(2) errors

       explain_getsockopt_or_die(3)
               Execute getsockopt(2) and report errors

       explain_gettimeofday(3)
               Explain gettimeofday(2) errors

       explain_gettimeofday_or_die(3)
               get time and report errors

       explain_getw(3)
               Explain getw(3) errors

       explain_getw_or_die(3)
               input a word (int) and report errors

       explain_iconv(3)
               Explain iconv(3) errors

       explain_iconv_or_die(3)
               perform character set conversion and report errors

       explain_iconv_close(3)
               Explain iconv_close(3) errors

       explain_iconv_close_or_die(3)
               deallocate descriptor for character set conversion and report errors

       explain_iconv_open(3)
               Explain iconv_open(3) errors

       explain_iconv_open_or_die(3)
               allocate descriptor for character set conversion and report errors

       explain_ioctl(3)
               Explain ioctl(2) errors

       explain_ioctl_or_die(3)
               Execute ioctl(2) and report errors

       explain_kill(3)
               Explain kill(2) errors

       explain_kill_or_die(3)
               send signal to a process and report errors

       explain_lchmod(3)
               Explain lchmod(2) errors

       explain_lchmod_or_die(3)
               change permissions of a file and report errors

       explain_lchown(3)
               Explain lchown(2) errors

       explain_lchown_or_die(3)
               change ownership of a file and report errors

       explain_lchownat(3)
               Explain lchownat(2) errors

       explain_lchownat_or_die(3)
               Execute lchownat(2) and report errors

       explain_link(3)
               Explain link(2) errors

       explain_link_or_die(3)
               make a new name for a file and report errors

       explain_linkat(3)
               Explain linkat(2) errors

       explain_linkat_or_die(3)
               create a file link relative to directory file descriptors and report errors

       explain_listen(3)
               Explain listen(2) errors

       explain_listen_or_die(3)
               listen for connections on a socket and report errors

       explain_lseek(3)
               Explain lseek(2) errors

       explain_lseek_or_die(3)
               reposition file offset and report errors

       explain_lstat(3)
               Explain lstat(2) errors

       explain_lstat_or_die(3)
               get file status and report errors

       explain_lutimes(3)
               Explain lutimes(3) errors

       explain_lutimes_or_die(3)
               modify file timestamps and report errors

       explain_malloc(3)
               Explain malloc(3) errors

       explain_malloc_or_die(3)
               Execute malloc(3) and report errors

       explain_mkdir(3)
               Explain mkdir(2) errors

       explain_mkdir_or_die(3)
               create directory and report errors

       explain_mkdtemp(3)
               Explain mkdtemp(3) errors

       explain_mkdtemp_or_die(3)
               create a unique temporary directory and report errors

       explain_mknod(3)
               Explain mknod(2) errors

       explain_mknod_or_die(3)
               create a special or ordinary file and report errors

       explain_mkostemp(3)
               Explain mkostemp(3) errors

       explain_mkostemp_or_die(3)
               create a unique temporary file and report errors

       explain_mkstemp(3)
               Explain mkstemp(3) errors

       explain_mkstemp_or_die(3)
               create a unique temporary file and report errors

       explain_mktemp(3)
               Explain mktemp(3) errors

       explain_mktemp_or_die(3)
               make a unique temporary filename and report errors

       explain_mmap(3)
               Explain mmap(2) errors

       explain_mmap_or_die(3)
               map file or device into memory and report errors

       explain_mount(3)
               Explain mount(2) errors

       explain_mount_or_die(3)
               mount file system and report errors

       explain_munmap(3)
               Explain munmap(2) errors

       explain_munmap_or_die(3)
               unmap a file or device from memory and report errors

       explain_nanosleep(3)
               Explain nanosleep(2) errors

       explain_nanosleep_or_die(3)
                   high‐resolution sleep and report errors

       explain_nice(3)
               Explain nice(2) errors

       explain_nice_or_die(3)
               change process priority and report errors

       explain_open(3)
               Explain open(2) errors

       explain_open_or_die(3)
               open files and report errors

       explain_openat(3)
               Explain openat(2) errors

       explain_openat_or_die(3)
               open a file relative to a directory file descriptor and report errors

       explain_opendir(3)
               Explain opendir(3) errors

       explain_opendir_or_die(3)
               open a directory and report errors

       explain_pathconf(3)
               Explain pathconf(3) errors

       explain_pathconf_or_die(3)
               get configuration values for files and report errors

       explain_pclose(3)
               Explain pclose(3) errors

       explain_pclose_or_die(3)
               Execute pclose(3) and report errors

       explain_pipe(3)
               Explain pipe(2) errors

       explain_pipe_or_die(3)
               Execute pipe(2) and report errors

       explain_pipe2(3)
               Explain pipe2(2) errors

       explain_pipe2_or_die(3)
               create pipe and report errors

       explain_poll(3)
               Explain poll(2) errors

       explain_poll_or_die(3)
               wait for some event on a file descriptor and report errors

       explain_popen(3)
               Explain popen(3) errors

       explain_popen_or_die(3)
               Execute popen(3) and report errors

       explain_pread(3)
               Explain pread(2) errors

       explain_pread_or_die(3)
               read from a file descriptor at a given offset and report errors

       explain_printf(3)
               Explain printf(3) errors

       explain_printf_or_die(3)
               formatted output conversion and report errors

       explain_ptrace(3)
               Explain ptrace(2) errors

       explain_ptrace_or_die(3)
               process trace and report errors

       explain_putc(3)
               Explain putc(3) errors

       explain_putc_or_die(3)
               output of characters and report errors

       explain_putchar(3)
               Explain putchar(3) errors

       explain_putchar_or_die(3)
               output of characters and report errors

       explain_putenv(3)
               Explain putenv(3) errors

       explain_putenv_or_die(3)
               change or add an environment variable and report errors

       explain_puts(3)
               Explain puts(3) errors

       explain_puts_or_die(3)
               write a string and a trailing newline to stdout and report errors

       explain_putw(3)
               Explain putw(3) errors

       explain_putw_or_die(3)
               output a word (int) and report errors

       explain_pwrite(3)
               Explain pwrite(2) errors

       explain_pwrite_or_die(3)
               write to a file descriptor at a given offset and report errors

       explain_raise(3)
               Explain raise(3) errors

       explain_raise_or_die(3)
               send a signal to the caller and report errors

       explain_read(3)
               Explain read(2) errors

       explain_read_or_die(3)
               read from a file descriptor and report errors

       explain_readdir(3)
               Explain readdir(3) errors

       explain_readdir_or_die(3)
               read a directory and report errors

       explain_readlink(3)
               Explain readlink(2) errors

       explain_readlink_or_die(3)
               read value of a symbolic link and report errors

       explain_readv(3)
               Explain readv(2) errors

       explain_readv_or_die(3)
               read data into multiple buffers and report errors

       explain_realloc(3)
               Explain realloc(3) errors

       explain_realloc_or_die(3)
               Execute realloc(3) and report errors

       explain_realpath(3)
               Explain realpath(3) errors

       explain_realpath_or_die(3)
               return the canonicalized absolute pathname and report errors

       explain_rename(3)
               Explain rename(2) errors

       explain_rename_or_die(3)
               change the name or location of a file and report errors

       explain_rmdir(3)
               Explain rmdir(2) errors

       explain_rmdir_or_die(3)
               delete a directory and report errors

       explain_select(3)
               Explain select(2) errors

       explain_select_or_die(3)
               execute select(2) and report errors

       explain_setbuf(3)
               Explain setbuf(3) errors

       explain_setbuffer(3)
               Explain setbuffer(3) errors

       explain_setbuffer_or_die(3)
               stream buffering operations and report errors

       explain_setbuf_or_die(3)
               set stream buffer and report errors

       explain_setdomainname(3)
               Explain setdomainname(2) errors

       explain_setdomainname_or_die(3)
               set domain name and report errors

       explain_setenv(3)
               Explain setenv(3) errors

       explain_setenv_or_die(3)
               change or add an environment variable and report errors

       explain_setgid(3)
               Explain setgid(2) errors

       explain_setgid_or_die(3)
               set group identity and report errors

       explain_setgrent(3)
               Explain setgrent(3) errors

       explain_setgrent_or_die(3)
               rewind to the start of the group database and report errors

       explain_setgroups(3)
               Explain setgroups(2) errors

       explain_setgroups_or_die(3)
               get list of supplementary group IDs and report errors

       explain_sethostname(3)
               Explain sethostname(2) errors

       explain_sethostname_or_die(3)
               set hostname and report errors

       explain_setlinebuf(3)
               Explain setlinebuf(3) errors

       explain_setlinebuf_or_die(3)
               stream buffering operations and report errors

       explain_setpgid(3)
               Explain setpgid(2) errors

       explain_setpgid_or_die(3)
               set process group and report errors

       explain_setpgrp(3)
               Explain setpgrp(2) errors

       explain_setpgrp_or_die(3)
               set process group and report errors

       explain_setpriority(3)
               Explain setpriority(2) errors

       explain_setpriority_or_die(3)
               set program scheduling priority and report errors

       explain_setregid(3)
               Explain setregid(2) errors

       explain_setregid_or_die(3)
               set real and/or effective group ID and report errors

       explain_setreuid(3)
               Explain setreuid(2) errors

       explain_setreuid_or_die(3)
               set the real and effective user ID and report errors

       explain_setresgid(3)
               Explain setresgid(2) errors

       explain_setresgid_or_die(3)
               set real, effective and saved group ID and report errors

       explain_setresuid(3)
               Explain setresuid(2) errors

       explain_setresuid_or_die(3)
               set real, effective and saved user ID and report errors

       explain_setreuid(3)
               Explain setreuid(2) errors

       explain_setreuid_or_die(3)
               set real and/or effective user ID and report errors

       explain_setsid(3)
               Explain setsid(2) errors

       explain_setsid_or_die(3)
               creates a session and sets the process group ID and report errors

       explain_setsockopt(3)
               Explain setsockopt(2) errors

       explain_setsockopt_or_die(3)
               execute setsockopt(2) and report errors

       explain_settimeofday(3)
               Explain settimeofday(2) errors

       explain_settimeofday_or_die(3)
               sets system time and report errors

       explain_setuid(3)
               Explain setuid(2) errors

       explain_setuid_or_die(3)
               set user identity and report errors

       explain_setvbuf(3)
               Explain setvbuf(3) errors

       explain_setvbuf_or_die(3)
               stream buffering operations and report errors

       explain_shmat(3)
               Explain shmat(2) errors

       explain_shmat_or_die(3)
               shared memory attach and report errors

       explain_shmctl(3)
               Explain shmctl(2) errors

       explain_shmctl_or_die(3)
               shared memory control and report errors

       explain_signalfd(3)
               Explain signalfd(2) errors

       explain_signalfd_or_die(3)
               create a file descriptor for accepting signals and report errors

       explain_sleep(3)
               Explain sleep(3) errors

       explain_sleep_or_die(3)
               Sleep for the specified number of seconds and report errors

       explain_socket(3)
               Explain socket(2) errors

       explain_socket_or_die(3)
               create an endpoint for communication and report errors

       explain_socketpair(3)
               Explain socketpair(2) errors

       explain_socketpair_or_die(3)
               create a pair of connected sockets and report errors

       explain_sprintf(3)
               Explain sprintf(3) errors

       explain_sprintf_or_die(3)
               formatted output conversion and report errors

       explain_stat(3)
               Explain stat(2) errors

       explain_statfs(3)
               Explain statfs(2) errors

       explain_statfs_or_die(3)
               get file system statistics and report errors

       explain_statvfs(3)
               Explain statvfs(2) errors

       explain_statvfs_or_die(3)
               get file system statistics and report errors

       explain_stime(3)
               Explain stime(2) errors

       explain_stime_or_die(3)
               set system time and report errors

       explain_strcoll(3)
               Explain strcoll(3) errors

       explain_strcoll_or_die(3)
               compare two strings using the current locale and report errors

       explain_strdup(3)
               Explain strdup(3) errors

       explain_strdup_or_die(3)
               duplicate a string and report errors

       explain_strndup(3)
               Explain strndup(3) errors

       explain_strndup_or_die(3)
               duplicate a string and report errors

       explain_strtod(3)
               Explain strtod(3) errors

       explain_strtod_or_die(3)
               convert string to floating‐point number and report errors

       explain_strtof(3)
               Explain strtof(3) errors

       explain_strtof_or_die(3)
               convert string to floating‐point number and report errors

       explain_strtol(3)
               Explain strtol(3) errors

       explain_strtol_or_die(3)
               convert a string to a long integer and report errors

       explain_strtold(3)
               Explain strtold(3) errors

       explain_strtold_or_die(3)
               convert string to floating‐point number and report errors

       explain_strtoll(3)
               Explain strtoll(3) errors

       explain_strtoll_or_die(3)
               convert a string to a long long integer and report errors

       explain_strtoul(3)
               Explain strtoul(3) errors

       explain_strtoul_or_die(3)
               convert a string to a long long integer and report errors

       explain_strtoull(3)
               Explain strtoull(3) errors

       explain_strtoull_or_die(3)
               convert a string to an unsigned long long integer and report errors

       explain_symlink(3)
               Explain symlink(2) errors

       explain_symlink_or_die(3)
               make a new name for a file and report errors

       explain_system(3)
               Explain system(3) errors

       explain_system_or_die(3)
               execute a shell command and report errors

       explain_tcdrain(3)
               Explain tcdrain(3) errors

       explain_tcdrain_or_die(3)
               Execute tcdrain(3) and report errors

       explain_tcflow(3)
               Explain tcflow(3) errors

       explain_tcflow_or_die(3)
               Execute tcflow(3) and report errors

       explain_tcflush(3)
               Explain tcflush(3) errors

       explain_tcflush_or_die(3)
               discard terminal data and report errors

       explain_tcgetattr(3)
               Explain tcgetattr(3) errors

       explain_tcgetattr_or_die(3)
               get terminal parameters and report errors

       explain_tcsendbreak(3)
               Explain tcsendbreak(3) errors

       explain_tcsendbreak_or_die(3)
               send terminal line break and report errors

       explain_tcsetattr(3)
               Explain tcsetattr(3) errors

       explain_tcsetattr_or_die(3)
               set terminal attributes and report errors

       explain_telldir(3)
               Explain telldir(3) errors

       explain_telldir_or_die(3)
               return current location in directory stream and report errors

       explain_tempnam(3)
               Explain tempnam(3) errors

       explain_tempnam_or_die(3)
               create a name for a temporary file and report errors

       explain_time(3)
               Explain time(2) errors

       explain_time_or_die(3)
               get time in seconds and report errors

       explain_timerfd_create(3)
               Explain timerfd_create(2) errors

       explain_timerfd_create_or_die(3)
               timers that notify via file descriptors and report errors

       explain_tmpfile(3)
               Explain tmpfile(3) errors

       explain_tmpfile_or_die(3)
               create a temporary file and report errors

       explain_tmpnam(3)
               Explain tmpnam(3) errors

       explain_tmpnam_or_die(3)
               create a name for a temporary file and report errors

       explain_truncate(3)
               Explain truncate(2) errors

       explain_truncate_or_die(3)
               truncate a file to a specified length and report errors

       explain_usleep(3)
               Explain usleep(3) errors

       explain_usleep_or_die(3)
               suspend execution for microsecond intervals and report errors

       explain_uname(3)
               Explain uname(2) errors

       explain_uname_or_die(3)
               get name and information about current kernel and report errors

       explain_ungetc(3)
               Explain ungetc(3) errors

       explain_ungetc_or_die(3)
               push a character back to a stream and report errors

       explain_unlink(3)
               Explain unlink(2) errors

       explain_unlink_or_die(3)
               delete a file and report errors

       explain_unsetenv(3)
               Explain unsetenv(3) errors

       explain_unsetenv_or_die(3)
               remove an environment variable and report errors

       explain_ustat(3)
               Explain ustat(2) errors

       explain_ustat_or_die(3)
               get file system statistics and report errors

       explain_utime(3)
               Explain utime(2) errors

       explain_utime_or_die(3)
               change file last access and modification times and report errors

       explain_utimens(3)
               Explain utimens(2) errors

       explain_utimens_or_die(3)
               change file last access and modification times and report errors

       explain_utimensat(3)
               Explain utimensat(2) errors

       explain_utimensat_or_die(3)
               change file timestamps with nanosecond precision and report errors

       explain_utimes(3)
               Explain utimes(2) errors

       explain_utimes_or_die(3)
               change file last access and modification times and report errors

       explain_vasprintf(3)
               Explain vasprintf(3) errors

       explain_vasprintf_or_die(3)
               print to allocated string and report errors

       explain_vfork(3)
               Explain vfork(2) errors

       explain_vfork_or_die(3)
               create a child process and block parent and report errors

       explain_vfprintf(3)
               Explain vfprintf(3) errors

       explain_vfprintf_or_die(3)
               formatted output conversion and report errors

       explain_vprintf(3)
               Explain vprintf(3) errors

       explain_vprintf_or_die(3)
               formatted output conversion and report errors

       explain_vsnprintf(3)
               Explain vsnprintf(3) errors

       explain_vsnprintf_or_die(3)
               formatted output conversion and report errors

       explain_snprintf(3)
               Explain snprintf(3) errors

       explain_snprintf_or_die(3)
               formatted output conversion and report errors

       explain_vsprintf(3)
               Explain vsprintf(3) errors

       explain_vsprintf_or_die(3)
               formatted output conversion and report errors

       explain_wait(3)
               Explain wait(2) errors

       explain_wait_or_die(3)
               wait for process to change state and report errors

       explain_wait3(3)
               Explain wait3(2) errors

       explain_wait3_or_die(3)
               wait for process to change state and report errors

       explain_wait4(3)
               Explain wait4(2) errors

       explain_wait4_or_die(3)
               wait for process to change state and report errors

       explain_waitpid(3)
               Explain waitpid(2) errors

       explain_waitpid_or_die(3)
               wait for process to change state and report errors

       explain_write(3)
               Explain write(2) errors

       explain_write_or_die(3)
               write to a file descriptor and report errors

       explain_writev(3)
               Explain writev(2) errors

       explain_writev_or_die(3)
               write data from multiple buffers and report errors

       There are plans for additional coverage.   This  list  is  expected  to  expand  in  later
       releases of this library.

SEE ALSO

       errno(3)
               number of last error

       perror(3)
               print a system error message

       strerror(3)
               return string describing error number

COPYRIGHT

       libexplain version 1.4
       Copyright (C) 2008 Peter Miller

AUTHOR

       Written by Peter Miller <pmiller@opensource.org.au>

                                                                                    libexplain(3)