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Diffstat (limited to '')
| -rw-r--r-- | include/unistd.h | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/include/unistd.h b/include/unistd.h index 47db049..d27f342 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -800,6 +800,80 @@ int fexecv(int, char* const[]); */ int fexecve(int, char* const[], char* const[]); +#if defined(__PLAN9_SOURCE) || defined(__SLIBC_SOURCE) +/** + * Search the environment variable $PATH for an executable + * file whose name is the specified name. Slashes are ignored + * and treated as any other character. $PATH is searched + * for left to right, and ':' is used as the path-delimiter. + * + * $PATH is not inspected if `name` starts with './', '../', or '/'. + * + * This is a Plan 9 from Bell Labs compliant slibc extension. + * + * @etymology (Search) ($PATH) for an executable. + * + * @param name The name of the sought executable. Must not be `NULL`. + * @return The pathname of the sought file, `NULL` on error, + * or if not found. Files that are not executable + * are (almost) ignored. + * + * @throws ENOMEM The process cannot allocate enough memory. + * @throws ENOENT $PATH is not defined, there are no directories + * listed in $PATH, or the sought file is not + * exist inside $PATH. + * @throws EACCES None of the candidates (with at least one candidate) + * are executable by the current user. + * @throws Any exception defined for access(3), except for `EROFS`, + * these when encountered, the search is aborted, unless + * the error is `ENOENT` or `EACCES`. + * + * @since Always. + */ +char* searchpath(const char*); +#endif + +#if defined(__SLIBC_SOURCE) +/** + * Search the environment variable $PATH for an executable + * file whose name is the specified name. Slashes are ignored + * and treated as any other character. $PATH is searched + * for left to right, and ':' is used as the path-delimiter. + * If $PATH is not defined, a fallback value for $PATH will be + * used. + * + * $PATH is not inspected if `name` starts with './', '../', or '/'. + * + * This function was added because it was useful in implementing + * the `exec`-function family. + * + * This is a slibc extension. + * + * @etymology Variant of (searchpath) that takes (2) arguments. + * + * @param name The name of the sought executable. Must not be `NULL`. + * @param fallback Value to use instead of the value of $PATH, if + * path is not defined. If `NULL` the fall rules for + * the `exec`-functions are used: The current working + * directory, and the default value for $PATH. + * @return The pathname of the sought file, `NULL` on error, + * or if not found. Files that are not executable + * are (almost) ignored. + * + * @throws ENOMEM The process cannot allocate enough memory. + * @throws ENOENT There are no directories listed in $PATH, or + * the sought file is not exist inside $PATH. + * @throws EACCES None of the candidates (with at least one candidate) + * are executable by the current user. + * @throws Any exception defined for access(3), except for `EROFS`, + * these when encountered, the search is aborted, unless + * the error is `ENOENT` or `EACCES`. + * + * @since Always. + */ +char* searchpath2(const char*, const char*); +#endif + #endif |