GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
RedHat 9.0(Shrike) |
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Tcl_SetErrno(3) |
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Tcl_SetErrno, Tcl_GetErrno, Tcl_ErrnoId, Tcl_ErrnoMsg − manipulate errno to store and retrieve error codes
#include <tcl.h>
void
Tcl_SetErrno(errorCode)
int
Tcl_GetErrno()
char *
Tcl_ErrnoId()
char *
Tcl_ErrnoMsg()
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int errorCode (in) |
A POSIX error code such as ENOENT. |
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Tcl_SetErrno and Tcl_GetErrno provide portable access to the errno variable, which is used to record a POSIX error code after system calls and other operations such as Tcl_Gets. These procedures are necessary because global variable accesses cannot be made across module boundaries on some platforms.
Tcl_SetErrno sets the errno variable to the value of the errorCode argument C procedures that wish to return error information to their callers via errno should call Tcl_SetErrno rather than setting errno directly.
Tcl_GetErrno returns the current value of errno. Procedures wishing to access errno should call this procedure instead of accessing errno directly.
Tcl_ErrnoId and Tcl_ErrnoMsg return a string representation of the current errno value. Tcl_ErrnoId returns a machine-readable textual identifier such as "EACCES". Tcl_ErrnoMsg returns a human-readable string such as "permission denied". The strings returned by these functions are statically allocated and the caller must not free or modify them.
errno, error code, global variables
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Tcl_SetErrno(3) | |