#include "config.h"
#include "libiberty.h"
+#include <stdio.h>
#define install_error_msg "installation problem, cannot exec `%s'"
/* value of `pipe': port index for writing. */
#define WRITE_PORT 1
+/* The structure used by pex_init and friends. */
+
+struct pex_obj
+{
+ /* Flags. */
+ int flags;
+ /* Name of calling program, for error messages. */
+ const char *pname;
+ /* Base name to use for temporary files. */
+ const char *tempbase;
+ /* Pipe to use as stdin for next process. */
+ int next_input;
+ /* File name to use as stdin for next process. */
+ char *next_input_name;
+ /* Whether next_input_name was allocated using malloc. */
+ int next_input_name_allocated;
+ /* Number of child processes. */
+ int count;
+ /* PIDs of child processes; array allocated using maloc. */
+ long *children;
+ /* Exit statuses of child processes; array allocated using malloc. */
+ int *status;
+ /* Time used by child processes; array allocated using malloc. */
+ struct pex_time *time;
+ /* Number of children we have already waited for. */
+ int number_waited;
+ /* FILE created by pex_read_output. */
+ FILE *read_output;
+ /* Number of temporary files to remove. */
+ int remove_count;
+ /* List of temporary files to remove; array allocated using malloc
+ of strings allocated using malloc. */
+ char **remove;
+ /* Pointers to system dependent functions. */
+ const struct pex_funcs *funcs;
+ /* For use by system dependent code. */
+ void *sysdep;
+};
+
+/* Functions passed to pex_run_common. */
+
+struct pex_funcs
+{
+ /* Open file NAME for reading. If BINARY is non-zero, open in
+ binary mode. Return >= 0 on success, -1 on error. */
+ int (*open_read) (struct pex_obj *, const char *name, int binary);
+ /* Open file NAME for writing. If BINARY is non-zero, open in
+ binary mode. Return >= 0 on success, -1 on error. */
+ int (*open_write) (struct pex_obj *, const char *name, int binary);
+ /* Execute a child process. FLAGS, EXECUTABLE, ARGV, ERR are from
+ pex_run. IN, OUT, ERRDES are each a descriptor, from open_read,
+ open_write, or pipe, or they are one of STDIN_FILE_NO,
+ STDOUT_FILE_NO or STDERR_FILE_NO; if not STD*_FILE_NO, they
+ should be closed. The function should handle the
+ PEX_STDERR_TO_STDOUT flag. Return >= 0 on success, or -1 on
+ error and set *ERRMSG and *ERR. */
+ long (*exec_child) (struct pex_obj *, int flags, const char *executable,
+ char * const * argv, int in, int out, int errdes,
+ const char **errmsg, int *err);
+ /* Close a descriptor. Return 0 on success, -1 on error. */
+ int (*close) (struct pex_obj *, int);
+ /* Wait for a child to complete, returning exit status in *STATUS
+ and time in *TIME (if it is not null). CHILD is from fork. DONE
+ is 1 if this is called via pex_free. ERRMSG and ERR are as in
+ fork. Return 0 on success, -1 on error. */
+ int (*wait) (struct pex_obj *, long, int *status, struct pex_time *time,
+ int done, const char **errmsg, int *err);
+ /* Create a pipe (only called if PEX_USE_PIPES is set) storing two
+ descriptin in *P. If BINARY is non-zero, open in binary mode.
+ Return 0 on success, -1 on error. */
+ int (*pipe) (struct pex_obj *, int *p, int binary);
+ /* Get a FILE pointer to read from a file descriptor (only called if
+ PEX_USE_PIPES is set). If BINARY is non-zero, open in binary
+ mode. Return pointer on success, NULL on error. */
+ FILE * (*fdopenr) (struct pex_obj *, int fd, int binary);
+ /* Free any system dependent data associated with OBJ. May be
+ NULL if there is nothing to do. */
+ void (*cleanup) (struct pex_obj *);
+};
+
+extern struct pex_obj *pex_init_common (int, const char *, const char *,
+ const struct pex_funcs *);
+
#endif
OSDN Git Service
