common/man/fmt.3

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 FMT 3
 NAME
fmt - string formatting routines
 SYNOPSIS
.EX
#include <ast.h>
#include <ls.h>

char* fmtbase(long number, int base, int prefix);
char* fmtdev(struct stat* st);
char* fmtelapsed(unsigned long count, int persec)
char* fmterror(int errno);
char* fmtesc(const char* string);
char* fmtfs(struct stat* st);
char* fmtgid(int gid);
char* fmtmatch(const char* re);
char* fmtmode(int mode, int external);
char* fmtperm(int perm);
char* fmtre(const char* pattern);
char* fmtsignal(int sig);
char* fmttime(const char* format, time_t tm);
char* fmtuid(int uid);

 DESCRIPTION
These routines return a pointer to a formatted string for various numeric
and string entities.
Some routines may cache information to speed up the next call.
Most of the routines return a pointer to a private buffer, the
contents of which are overwritten on the next call to that routine.
Most
.L fmt
routines have a corresponding
.L str
routine that converts in the other direction.
There is nothing spectacular about this collection other than that
it provides a single place where the exact format is spelled out.

.L fmtbase
formats a base
 base representation for
 number . If
 "prefix != 0" then the base prefix is included in the formatted string.
If
 "number == 0" or
 "base == 0" then the output is signed base 10.

.L fmtdev
returns the device handle name specified by the
.L stat
structure
 st . This is the device information displayed by
 "ls -l" .
.L fmtelapsed
formats the elapsed time for
 (count/persec) seconds.
The two largest time units are used, limiting the return value length
to at most 6 characters.
The units are:


 s seconds

 m minutes

 h hours

 days
 weeks
 M months

 Y years

 S scores


.L fmterror
returns the system error message text for the error number
 errno .
.L fmtesc
formats non-ASCII characters in
 string into C-style
 \e sequences.
These sequences are understood by
.L chresc
and
.LR chrtoi .

.L fmtfs
returns the file system type name corresponding to the
.L stat
structure
 st .
.L fmtgid
returns the group name for
 gid .
.L fmtmatch
returns the
.L strmatch
equivalent pattern for the regular expression pattern
 re . 0 is returned for invalid
 re .
.L fmtmode
returns the
 "ls -l" mode string for the file mode bits in
 mode . If
 "external != 0" then
 mode is
 modecanon (3) canonical.

.L fmtperm
returns the
 chmod permission string for the permission bits in
 perm .
.L fmtre
returns the regular expression
equivalent pattern for the
.L strmatch
pattern
 pattern . 0 is returned for invalid
 pattern .
.L fmtsignal
returns the signal name, sans
.LR SIG ,
for the signal number
 sig . If
 "sig < 0" then the description text for
 -sig is returned.

.L fmttime
returns the results of
 "tmfmt(buf,sizeof(buf),format,tm)" in the private buffer
 buf .
.L fmtuid
returns the user name for
 uid .  "SEE ALSO"
modecanon(3),
str(3)