diff options
Diffstat (limited to 'libps')
| -rw-r--r-- | libps/ps.h | 82 |
1 files changed, 66 insertions, 16 deletions
@@ -115,7 +115,7 @@ char *ps_tty_name(ps_tty_t tty); char *ps_tty_short_name(ps_tty_t tty); /* ---------------------------------------------------------------- */ -/* A ps_contex_t holds various information resulting from querying a +/* A ps_context_t holds various information resulting from querying a particular process server, in particular a group of proc_stats, ps_users, and ps_ttys. This information sticks around until the context is freed (subsets may be created by making proc_stat_lists). */ @@ -140,6 +140,9 @@ struct ps_context /* ps_user_t's for every user we know about, indexed by user-id. */ ihash_t users; + + /* Functions that can be set to extend the behavior of proc_stats. */ + struct ps_user_hooks *user_hooks; }; #define ps_context_server(pc) ((pc)->server) @@ -187,10 +190,11 @@ struct proc_stat /* Flags describing which fields in this structure are valid. */ ps_flags_t flags; + ps_flags_t failed; /* flags that we tried to set and couldn't. */ /* Thread fields -- these are valid if PID < 0. */ proc_stat_t thread_origin; /* A proc_stat_t for the task we're in. */ - unsigned thread_index; /* Which thread in our proc we are. */ + unsigned thread_index; /* Which thread in our proc we are. */ /* A process_t port for the process. */ process_t process; @@ -274,6 +278,9 @@ struct proc_stat /* A ps_tty_t object for the process's controlling terminal. */ ps_tty_t tty; + + /* A hook for the user to use. */ + void *hook; }; /* Proc_stat flag bits; each bit is set in the FLAGS field if that @@ -302,9 +309,14 @@ struct proc_stat #define PSTAT_OWNER_UID 0x100000 /* The uid of the the proc's owner */ #define PSTAT_UMASK 0x200000 /* The proc's current umask */ #define PSTAT_EXEC_FLAGS 0x400000 /* The process's exec flags */ +#define PSTAT_HOOK 0x800000 /* Has a non-zero hook */ /* Flag bits that don't correspond precisely to any field. */ -#define PSTAT_NO_MSGPORT 0x800000 /* Don't use the msgport at all */ +#define PSTAT_NO_MSGPORT 0x1000000 /* Don't use the msgport at all */ + +/* Bits from PSTAT_USER_BASE on up are available for user-use. */ +#define PSTAT_USER_BASE 0x2000000 +#define PSTAT_USER_MASK ~(PSTAT_USER_BASE - 1) /* If the PSTAT_STATE flag is set, then the proc_stat's state field holds a bitmask of the following bits, describing the process's run state. If you @@ -429,6 +441,28 @@ error_t proc_stat_set_flags(proc_stat_t ps, ps_flags_t flags); error_t proc_stat_thread_create(proc_stat_t ps, unsigned n, proc_stat_t *thread_ps); /* ---------------------------------------------------------------- */ +/* A struct ps_user_hooks holds functions that allow the user to extend the + behavior of libps. */ + +struct ps_user_hooks +{ + /* Given a set of flags in the range defined by PSTAT_USER_MASK, should + return any other flags (user or system) which should be set as a + precondition to setting them. */ + ps_flags_t (*dependencies) (ps_flags_t flags); + + /* Try and fetch the information corresponding to NEED (which is in the + range defined by PSTAT_USER_MASK), and fill in the necessary fields in + PS (probably in a user defined structure pointed to by the hook field). + The user flags corresponding to what is successfully fetched should be + returned. HAVE are the flags defining whas is currently valid in PS. */ + ps_flags_t (*fetch) (proc_stat_t ps, ps_flags_t need, ps_flags_t have); + + /* When a proc_stat goes away, this function is called on it. */ + void (*cleanup) (proc_stat_t ps); +}; + +/* ---------------------------------------------------------------- */ /* A PS_GETTER_T describes how to get a particular value from a PROC_STAT_T. @@ -570,9 +604,16 @@ typedef struct ps_fmt_spec *ps_fmt_spec_t; struct ps_fmt_spec { - /* The name of the spec (and it's default title) */ + /* The name of the spec (and it's title, if TITLE is NULL). */ char *name; + /* The title to be printed in the headers. */ + char *title; + + /* The width of the field that this spec will be printed in if not + overridden. */ + int width; + ps_getter_t getter; /* A function that, given a ps, a getter, a field width, and a stream, @@ -590,31 +631,36 @@ struct ps_fmt_spec This may be NULL, in which case values in this field are _always_ exciting... */ bool (*nominal_fn)(proc_stat_t ps, ps_getter_t getter); - - /* The default width of the field that this spec will be printed in if not - overridden. */ - int default_width; }; /* Accessor macros: */ #define ps_fmt_spec_name(spec) ((spec)->name) +#define ps_fmt_spec_title(spec) ((spec)->title) +#define ps_fmt_spec_width(spec) ((spec)->width) #define ps_fmt_spec_output_fn(spec) ((spec)->output_fn) #define ps_fmt_spec_compare_fn(spec) ((spec)->cmp_fn) #define ps_fmt_spec_nominal_fn(spec) ((spec)->nominal_fn) #define ps_fmt_spec_getter(spec) ((spec)->getter) -#define ps_fmt_spec_default_width(spec) ((spec)->default_width) -/* Returns true if a pointer into an array of struct ps_fmt_specs is at the +/* Returns true if a pointer into an array of struct ps_fmt_spec's is at the end. */ #define ps_fmt_spec_is_end(spec) ((spec)->name == NULL) + +typedef struct ps_fmt_specs *ps_fmt_specs_t; -/* An array of struct ps_fmt_spec, suitable for use with find_ps_fmt_spec, +struct ps_fmt_specs +{ + ps_fmt_spec_t specs; /* An array of specs. */ + ps_fmt_specs_t parent; /* A link to more specs shadowed by this. */ +}; + +/* An struct ps_fmt_specs, suitable for use with ps_fmt_specs_find, containing specs for most values in a proc_stat_t. */ -extern struct ps_fmt_spec ps_std_fmt_specs[]; +extern struct ps_fmt_specs ps_std_fmt_specs; -/* Searches for a spec called NAME in SPECS (an array of struct ps_fmt_spec) - and returns it if found, otherwise NULL. */ -ps_fmt_spec_t find_ps_fmt_spec(char *name, ps_fmt_spec_t specs); +/* Searches for a spec called NAME in SPECS and returns it if found, + otherwise NULL. */ +ps_fmt_spec_t ps_fmt_specs_find (ps_fmt_specs_t specs, char *name); /* ---------------------------------------------------------------- */ /* A PS_FMT_T describes how to output user-readable version of a proc_stat_t. @@ -669,12 +715,16 @@ struct ps_fmt /* Storage for various strings pointed to by the fields. */ char *src; + + /* The string displayed by default for fields that have no valid value. */ + char *inval; }; /* Accessor macros: */ #define ps_fmt_fields(fmt) ((fmt)->fields) #define ps_fmt_num_fields(fmt) ((fmt)->num_fields) #define ps_fmt_needs(fmt) ((fmt)->needs) +#define ps_fmt_inval (fmt) ((fmt)->inval) /* Make a PS_FMT_T by parsing the string SRC, searching for any named @@ -696,7 +746,7 @@ struct ps_fmt spec's default width. If a `-' is included, the output is right-aligned within this width, otherwise it is left-aligned. */ -error_t ps_fmt_create(char *src, ps_fmt_spec_t fmt_specs, ps_fmt_t *fmt); +error_t ps_fmt_create(char *src, ps_fmt_specs_t fmt_specs, ps_fmt_t *fmt); /* Free FMT, and any resources it consumes. */ void ps_fmt_free(ps_fmt_t fmt); |