1 #ifndef __PERF_RUN_COMMAND_H 2 #define __PERF_RUN_COMMAND_H 3 4 enum { 5 ERR_RUN_COMMAND_FORK = 10000, 6 ERR_RUN_COMMAND_EXEC, 7 ERR_RUN_COMMAND_PIPE, 8 ERR_RUN_COMMAND_WAITPID, 9 ERR_RUN_COMMAND_WAITPID_WRONG_PID, 10 ERR_RUN_COMMAND_WAITPID_SIGNAL, 11 ERR_RUN_COMMAND_WAITPID_NOEXIT, 12 }; 13 #define IS_RUN_COMMAND_ERR(x) (-(x) >= ERR_RUN_COMMAND_FORK) 14 15 struct child_process { 16 const char **argv; 17 pid_t pid; 18 /* 19 * Using .in, .out, .err: 20 * - Specify 0 for no redirections (child inherits stdin, stdout, 21 * stderr from parent). 22 * - Specify -1 to have a pipe allocated as follows: 23 * .in: returns the writable pipe end; parent writes to it, 24 * the readable pipe end becomes child's stdin 25 * .out, .err: returns the readable pipe end; parent reads from 26 * it, the writable pipe end becomes child's stdout/stderr 27 * The caller of start_command() must close the returned FDs 28 * after it has completed reading from/writing to it! 29 * - Specify > 0 to set a channel to a particular FD as follows: 30 * .in: a readable FD, becomes child's stdin 31 * .out: a writable FD, becomes child's stdout/stderr 32 * .err > 0 not supported 33 * The specified FD is closed by start_command(), even in case 34 * of errors! 35 */ 36 int in; 37 int out; 38 int err; 39 const char *dir; 40 const char *const *env; 41 unsigned no_stdin:1; 42 unsigned no_stdout:1; 43 unsigned no_stderr:1; 44 unsigned perf_cmd:1; /* if this is to be perf sub-command */ 45 unsigned stdout_to_stderr:1; 46 void (*preexec_cb)(void); 47 }; 48 49 int start_command(struct child_process *); 50 int finish_command(struct child_process *); 51 int run_command(struct child_process *); 52 53 #define RUN_COMMAND_NO_STDIN 1 54 #define RUN_PERF_CMD 2 /*If this is to be perf sub-command */ 55 #define RUN_COMMAND_STDOUT_TO_STDERR 4 56 int run_command_v_opt(const char **argv, int opt); 57 58 #endif /* __PERF_RUN_COMMAND_H */ 59