diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/unistd.h | 53 |
1 files changed, 48 insertions, 5 deletions
diff --git a/include/unistd.h b/include/unistd.h index d27f342..2d7ee16 100644 --- a/include/unistd.h +++ b/include/unistd.h @@ -830,7 +830,8 @@ int fexecve(int, char* const[], char* const[]); * * @since Always. */ -char* searchpath(const char*); +char* searchpath(const char*) + __GCC_ONLY(__attribute__((__nonnull__(0)))); #endif #if defined(__SLIBC_SOURCE) @@ -853,9 +854,8 @@ char* searchpath(const char*); * * @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. + * path is not defined. If `NULL` the default value + * for $PATH is used. * @return The pathname of the sought file, `NULL` on error, * or if not found. Files that are not executable * are (almost) ignored. @@ -871,7 +871,50 @@ char* searchpath(const char*); * * @since Always. */ -char* searchpath2(const char*, const char*); +char* searchpath2(const char*, const char*) + __GCC_ONLY(__attribute__((__nonnull__(0)))); + +/** + * 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 default value + * for $PATH is used. + * @param first If $PATH is not defined, and `fallback` is `NULL`, + * these directories are tested before the default + * directories. May 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 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* searchpath3(const char*, const char*, const char*) + __GCC_ONLY(__attribute__((__nonnull__(0)))); #endif |