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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#ifndef INCLUDE_process_h__
#define INCLUDE_process_h__
typedef struct git_process git_process;
typedef struct {
unsigned int capture_in : 1,
capture_out : 1,
capture_err : 1,
exclude_env : 1;
char *cwd;
} git_process_options;
typedef enum {
GIT_PROCESS_STATUS_NONE,
GIT_PROCESS_STATUS_NORMAL,
GIT_PROCESS_STATUS_ERROR
} git_process_result_status;
#define GIT_PROCESS_RESULT_INIT { GIT_PROCESS_STATUS_NONE }
typedef struct {
git_process_result_status status;
int exitcode;
int signal;
} git_process_result;
#define GIT_PROCESS_OPTIONS_INIT { 0 }
#ifdef GIT_WIN32
# define p_pid_t DWORD
#else
# define p_pid_t pid_t
#endif
/**
* Create a new process. The command to run should be specified as the
* element of the `arg` array, execv-style. This should be the full path
* to the command to run, the PATH is not obeyed.
*
* This function will add the given environment variables (in `env`)
* to the current environment. Operations on environment variables
* are not thread safe, so you may not modify the environment during
* this call. You can avoid this by setting `exclude_env` in the
* options and providing the entire environment yourself.
*
* @param out location to store the process
* @param args the command (with arguments) to run
* @param args_len the length of the args array
* @param env environment variables to add (or NULL)
* @param env_len the length of the env len
* @param opts the options for creating the process
* @return 0 or an error code
*/
extern int git_process_new(
git_process **out,
const char **args,
size_t args_len,
const char **env,
size_t env_len,
git_process_options *opts);
/**
* Create a new process. The command to run should be specified as the
* `cmdline` option - which is the full text of the command line as it
* would be specified or run by a user. The command to run will be
* looked up in the PATH.
*
* On Unix, this will be executed by the system's shell (`/bin/sh`)
* and may contain _Bourne-style_ shell quoting rules. On Windows,
* this will be passed to `CreateProcess`, and similarly, may
* contain _Windows-style_ shell quoting rules.
*
* This function will add the given environment variables (in `env`)
* to the current environment. Operations on environment variables
* are not thread safe, so you may not modify the environment during
* this call. You can avoid this by setting `exclude_env` in the
* options and providing the entire environment yourself.
*/
extern int git_process_new_from_cmdline(
git_process **out,
const char *cmdline,
const char **env,
size_t env_len,
git_process_options *opts);
#ifdef GIT_WIN32
extern int git_process__appname(
git_str *out,
const char *cmdline);
/* Windows path parsing is tricky; this helper function is for testing. */
extern int git_process__cmdline(
git_str *out,
const char **in,
size_t in_len);
#endif
/*
* Whether the given string looks like a command line option (starts
* with a dash). This is useful for examining strings that will become
* cmdline arguments to ensure that they are not erroneously treated
* as an option. For example, arguments to `ssh`.
*/
GIT_INLINE(bool) git_process__is_cmdline_option(const char *str)
{
return (str && str[0] == '-');
}
/**
* Start the process.
*
* @param process the process to start
* @return 0 or an error code
*/
extern int git_process_start(git_process *process);
/**
* Returns the process id of the process.
*
* @param out pointer to a pid_t to store the process id
* @param process the process to query
* @return 0 or an error code
*/
extern int git_process_id(p_pid_t *out, git_process *process);
/**
* Read from the process's stdout. The process must have been created with
* `capture_out` set to true.
*
* @param process the process to read from
* @param buf the buf to read into
* @param count maximum number of bytes to read
* @return number of bytes read or an error code
*/
extern ssize_t git_process_read(git_process *process, void *buf, size_t count);
/**
* Read from the process's stderr. The process must have been created with
* `capture_err` set to true.
*
* @param process the process to read from
* @param buf the buf to read into
* @param count maximum number of bytes to read
* @return number of bytes read or an error code
*/
extern ssize_t git_process_read_err(git_process *process, void *buf, size_t count);
/**
* Write to the process's stdin. The process must have been created with
* `capture_in` set to true.
*
* @param process the process to write to
* @param buf the buf to write
* @param count maximum number of bytes to write
* @return number of bytes written or an error code
*/
extern ssize_t git_process_write(git_process *process, const void *buf, size_t count);
/**
* Wait for the process to finish.
*
* @param result the result of the process or NULL
* @param process the process to wait on
*/
extern int git_process_wait(git_process_result *result, git_process *process);
/**
* Close the input pipe from the child.
*
* @param process the process to close the pipe on
*/
extern int git_process_close_in(git_process *process);
/**
* Close the output pipe from the child.
*
* @param process the process to close the pipe on
*/
extern int git_process_close_out(git_process *process);
/**
* Close the error pipe from the child.
*
* @param process the process to close the pipe on
*/
extern int git_process_close_err(git_process *process);
/**
* Close all resources that are used by the process. This does not
* wait for the process to complete.
*
* @parma process the process to close
*/
extern int git_process_close(git_process *process);
/**
* Place a human-readable error message in the given git buffer.
*
* @param msg the buffer to store the message
* @param result the process result that produced an error
*/
extern int git_process_result_msg(git_str *msg, git_process_result *result);
/**
* Free a process structure
*
* @param process the process to free
*/
extern void git_process_free(git_process *process);
#endif
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