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6da213be31
Note that this changes the order of arguments to pipecmd to match the documentation, so we fix all the callers! Also make configure re-run when configurator changes. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/* CC0 license (public domain) - see LICENSE file for details */
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#ifndef CCAN_PIPECMD_H
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#define CCAN_PIPECMD_H
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#include "config.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stdarg.h>
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/**
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* pipecmd - run a command, optionally connect pipes.
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* @infd: input fd to write to child (if non-NULL)
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* @outfd: output fd to read from child (if non-NULL)
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* @errfd: error-output fd to read from child (if non-NULL)
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* @cmd...: NULL-terminate list of command and arguments.
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*
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* If @infd is NULL, the child's input is (read-only) /dev/null.
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* If @outfd is NULL, the child's output is (write-only) /dev/null.
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* If @errfd is NULL, the child's stderr is (write-only) /dev/null.
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*
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* If @errfd == @outfd (and non-NULL) they will be shared.
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* If @infd, @outfd or @errfd is &pipecmd_preserve, it is unchanged.
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*
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* The return value is the pid of the child, or -1.
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*/
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pid_t pipecmd(int *infd, int *outfd, int *errfd, const char *cmd, ...);
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/**
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* pipecmdv - run a command, optionally connect pipes (stdarg version)
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* @infd: input fd to write to child (if non-NULL)
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* @outfd: output fd to read from child (if non-NULL)
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* @errfd: error-output fd to read from child (if non-NULL)
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* @cmd: command to run.
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* @ap: argument list for arguments.
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*/
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pid_t pipecmdv(int *infd, int *outfd, int *errfd, const char *cmd, va_list ap);
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/**
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* pipecmdarr - run a command, optionally connect pipes (char arry version)
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* @infd: input fd to write to child (if non-NULL)
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* @outfd: output fd to read from child (if non-NULL)
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* @errfd: error-output fd to read from child (if non-NULL)
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* @arr: NULL-terminated array for arguments (first is program to run).
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*/
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pid_t pipecmdarr(int *infd, int *outfd, int *errfd, char *const *arr);
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/**
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* pipecmd_preserve - special value for fds to indicate it is unchanged
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*/
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extern int pipecmd_preserve;
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#endif /* CCAN_PIPECMD_H */
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