diff options
Diffstat (limited to 'manual/process.texi')
| -rw-r--r-- | manual/process.texi | 69 |
1 files changed, 23 insertions, 46 deletions
diff --git a/manual/process.texi b/manual/process.texi index 085fdec926..b82b91f9f1 100644 --- a/manual/process.texi +++ b/manual/process.texi @@ -51,9 +51,8 @@ function. This function does all the work of running a subprogram, but it doesn't give you much control over the details: you have to wait until the subprogram terminates before you can do anything else. -@comment stdlib.h -@comment ISO @deftypefun int system (const char *@var{command}) +@standards{ISO, stdlib.h} @pindex sh @safety{@prelim{}@mtsafe{}@asunsafe{@ascuplugin{} @ascuheap{} @asulock{}}@acunsafe{@aculock{} @acsmem{}}} @c system @ascuplugin @ascuheap @asulock @aculock @acsmem @@ -184,23 +183,20 @@ program should include the header files @file{unistd.h} and @pindex sys/types.h @pindex unistd.h -@comment sys/types.h -@comment POSIX.1 @deftp {Data Type} pid_t +@standards{POSIX.1, sys/types.h} The @code{pid_t} data type is a signed integer type which is capable of representing a process ID. In @theglibc{}, this is an @code{int}. @end deftp -@comment unistd.h -@comment POSIX.1 @deftypefun pid_t getpid (void) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} The @code{getpid} function returns the process ID of the current process. @end deftypefun -@comment unistd.h -@comment POSIX.1 @deftypefun pid_t getppid (void) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} The @code{getppid} function returns the process ID of the parent of the current process. @@ -213,9 +209,8 @@ The @code{fork} function is the primitive for creating a process. It is declared in the header file @file{unistd.h}. @pindex unistd.h -@comment unistd.h -@comment POSIX.1 @deftypefun pid_t fork (void) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{}@asunsafe{@ascuplugin{}}@acunsafe{@aculock{}}} @c The nptl/.../linux implementation safely collects fork_handlers into @c an alloca()ed linked list and increments ref counters; it uses atomic @@ -291,9 +286,8 @@ signals and signal actions from the parent process.) @end itemize -@comment unistd.h -@comment BSD @deftypefun pid_t vfork (void) +@standards{BSD, unistd.h} @safety{@prelim{}@mtsafe{}@asunsafe{@ascuplugin{}}@acunsafe{@aculock{}}} @c The vfork implementation proper is a safe syscall, but it may fall @c back to fork if the vfork syscall is not available. @@ -339,9 +333,8 @@ The functions in this family differ in how you specify the arguments, but otherwise they all do the same thing. They are declared in the header file @file{unistd.h}. -@comment unistd.h -@comment POSIX.1 @deftypefun int execv (const char *@var{filename}, char *const @var{argv}@t{[]}) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} The @code{execv} function executes the file named by @var{filename} as a new process image. @@ -358,18 +351,16 @@ The environment for the new process image is taken from the @ref{Environment Variables}, for information about environments. @end deftypefun -@comment unistd.h -@comment POSIX.1 @deftypefun int execl (const char *@var{filename}, const char *@var{arg0}, @dots{}) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} This is similar to @code{execv}, but the @var{argv} strings are specified individually instead of as an array. A null pointer must be passed as the last such argument. @end deftypefun -@comment unistd.h -@comment POSIX.1 @deftypefun int execve (const char *@var{filename}, char *const @var{argv}@t{[]}, char *const @var{env}@t{[]}) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} This is similar to @code{execv}, but permits you to specify the environment for the new program explicitly as the @var{env} argument. This should @@ -377,9 +368,8 @@ be an array of strings in the same format as for the @code{environ} variable; see @ref{Environment Access}. @end deftypefun -@comment unistd.h -@comment POSIX.1 @deftypefun int execle (const char *@var{filename}, const char *@var{arg0}, @dots{}, char *const @var{env}@t{[]}) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} This is similar to @code{execl}, but permits you to specify the environment for the new program explicitly. The environment argument is @@ -388,9 +378,8 @@ argument, and should be an array of strings in the same format as for the @code{environ} variable. @end deftypefun -@comment unistd.h -@comment POSIX.1 @deftypefun int execvp (const char *@var{filename}, char *const @var{argv}@t{[]}) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{@mtsenv{}}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} The @code{execvp} function is similar to @code{execv}, except that it searches the directories listed in the @code{PATH} environment variable @@ -402,9 +391,8 @@ it looks for them in the places that the user has chosen. Shells use it to run the commands that users type. @end deftypefun -@comment unistd.h -@comment POSIX.1 @deftypefun int execlp (const char *@var{filename}, const char *@var{arg0}, @dots{}) +@standards{POSIX.1, unistd.h} @safety{@prelim{}@mtsafe{@mtsenv{}}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}} This function is like @code{execl}, except that it performs the same file name searching as the @code{execvp} function. @@ -520,9 +508,8 @@ process to terminate or stop, and determine its status. These functions are declared in the header file @file{sys/wait.h}. @pindex sys/wait.h -@comment sys/wait.h -@comment POSIX.1 @deftypefun pid_t waitpid (pid_t @var{pid}, int *@var{status-ptr}, int @var{options}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} The @code{waitpid} function is used to request status information from a child process whose process ID is @var{pid}. Normally, the calling @@ -624,9 +611,8 @@ child processes that have been stopped as well as those that have terminated. @end vtable -@comment sys/wait.h -@comment POSIX.1 @deftypefun pid_t wait (int *@var{status-ptr}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} This is a simplified version of @code{waitpid}, and is used to wait until any one child process terminates. The call: @@ -651,9 +637,8 @@ protected using cancellation handlers. @c ref pthread_cleanup_push / pthread_cleanup_pop @end deftypefun -@comment sys/wait.h -@comment BSD @deftypefun pid_t wait4 (pid_t @var{pid}, int *@var{status-ptr}, int @var{options}, struct rusage *@var{usage}) +@standards{BSD, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} If @var{usage} is a null pointer, @code{wait4} is equivalent to @code{waitpid (@var{pid}, @var{status-ptr}, @var{options})}. @@ -704,58 +689,51 @@ encoded in the returned status value using the following macros. These macros are defined in the header file @file{sys/wait.h}. @pindex sys/wait.h -@comment sys/wait.h -@comment POSIX.1 @deftypefn Macro int WIFEXITED (int @var{status}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} This macro returns a nonzero value if the child process terminated normally with @code{exit} or @code{_exit}. @end deftypefn -@comment sys/wait.h -@comment POSIX.1 @deftypefn Macro int WEXITSTATUS (int @var{status}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} If @code{WIFEXITED} is true of @var{status}, this macro returns the low-order 8 bits of the exit status value from the child process. @xref{Exit Status}. @end deftypefn -@comment sys/wait.h -@comment POSIX.1 @deftypefn Macro int WIFSIGNALED (int @var{status}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} This macro returns a nonzero value if the child process terminated because it received a signal that was not handled. @xref{Signal Handling}. @end deftypefn -@comment sys/wait.h -@comment POSIX.1 @deftypefn Macro int WTERMSIG (int @var{status}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} If @code{WIFSIGNALED} is true of @var{status}, this macro returns the signal number of the signal that terminated the child process. @end deftypefn -@comment sys/wait.h -@comment BSD @deftypefn Macro int WCOREDUMP (int @var{status}) +@standards{BSD, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} This macro returns a nonzero value if the child process terminated and produced a core dump. @end deftypefn -@comment sys/wait.h -@comment POSIX.1 @deftypefn Macro int WIFSTOPPED (int @var{status}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} This macro returns a nonzero value if the child process is stopped. @end deftypefn -@comment sys/wait.h -@comment POSIX.1 @deftypefn Macro int WSTOPSIG (int @var{status}) +@standards{POSIX.1, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} If @code{WIFSTOPPED} is true of @var{status}, this macro returns the signal number of the signal that caused the child process to stop. @@ -771,9 +749,8 @@ predecessor to @code{wait4}, which is more flexible. @code{wait3} is now obsolete. @pindex sys/wait.h -@comment sys/wait.h -@comment BSD @deftypefun pid_t wait3 (int *@var{status-ptr}, int @var{options}, struct rusage *@var{usage}) +@standards{BSD, sys/wait.h} @safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}} If @var{usage} is a null pointer, @code{wait3} is equivalent to @code{waitpid (-1, @var{status-ptr}, @var{options})}. |