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61 lines
1.9 KiB
61 lines
1.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __SUBCMD_RUN_COMMAND_H |
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#define __SUBCMD_RUN_COMMAND_H |
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#include <unistd.h> |
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enum { |
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ERR_RUN_COMMAND_FORK = 10000, |
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ERR_RUN_COMMAND_EXEC, |
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ERR_RUN_COMMAND_PIPE, |
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ERR_RUN_COMMAND_WAITPID, |
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ERR_RUN_COMMAND_WAITPID_WRONG_PID, |
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ERR_RUN_COMMAND_WAITPID_SIGNAL, |
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ERR_RUN_COMMAND_WAITPID_NOEXIT, |
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}; |
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#define IS_RUN_COMMAND_ERR(x) (-(x) >= ERR_RUN_COMMAND_FORK) |
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struct child_process { |
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const char **argv; |
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pid_t pid; |
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/* |
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* Using .in, .out, .err: |
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* - Specify 0 for no redirections (child inherits stdin, stdout, |
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* stderr from parent). |
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* - Specify -1 to have a pipe allocated as follows: |
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* .in: returns the writable pipe end; parent writes to it, |
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* the readable pipe end becomes child's stdin |
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* .out, .err: returns the readable pipe end; parent reads from |
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* it, the writable pipe end becomes child's stdout/stderr |
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* The caller of start_command() must close the returned FDs |
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* after it has completed reading from/writing to it! |
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* - Specify > 0 to set a channel to a particular FD as follows: |
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* .in: a readable FD, becomes child's stdin |
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* .out: a writable FD, becomes child's stdout/stderr |
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* .err > 0 not supported |
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* The specified FD is closed by start_command(), even in case |
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* of errors! |
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*/ |
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int in; |
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int out; |
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int err; |
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const char *dir; |
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const char *const *env; |
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unsigned no_stdin:1; |
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unsigned no_stdout:1; |
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unsigned no_stderr:1; |
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unsigned exec_cmd:1; /* if this is to be external sub-command */ |
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unsigned stdout_to_stderr:1; |
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void (*preexec_cb)(void); |
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}; |
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int start_command(struct child_process *); |
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int finish_command(struct child_process *); |
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int run_command(struct child_process *); |
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#define RUN_COMMAND_NO_STDIN 1 |
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#define RUN_EXEC_CMD 2 /*If this is to be external sub-command */ |
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#define RUN_COMMAND_STDOUT_TO_STDERR 4 |
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int run_command_v_opt(const char **argv, int opt); |
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#endif /* __SUBCMD_RUN_COMMAND_H */
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