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705c09bb3c
Add non-blocking function to check if a 'struct child_process' has completed. If the process has completed the exit code is stored in the 'struct child_process' so that finish_command() returns it. Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kan Liang <kan.liang@linux.intel.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/r/20240405070931.1231245-1-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
67 lines
2.1 KiB
C
67 lines
2.1 KiB
C
/* 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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int finish_result;
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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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unsigned finished:1;
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void (*preexec_cb)(void);
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/* If set, call function in child rather than doing an exec. */
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int (*no_exec_cmd)(struct child_process *process);
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};
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int start_command(struct child_process *);
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int check_if_command_finished(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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