New component: cat

Generically reads an arbitrary file natively.

Saves a few layers of execution in comparison to using `run_command`
with an argument like `cat ./file`.
master
drkhsh 2 months ago
parent 4bd78c94ba
commit 57c6e7340d
  1. 1
      Makefile
  2. 1
      README
  3. 32
      components/cat.c
  4. 1
      config.def.h
  5. 3
      slstatus.h

@ -7,6 +7,7 @@ include config.mk
REQ = util
COM =\
components/battery\
components/cat\
components/cpu\
components/datetime\
components/disk\

@ -7,6 +7,7 @@ slstatus is a suckless status monitor for window managers that use WM_NAME
Features
--------
- Battery percentage/state/time left
- Cat (read file)
- CPU usage
- CPU frequency
- Custom shell commands

@ -0,0 +1,32 @@
/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <string.h>
#include "../slstatus.h"
#include "../util.h"
const char *
cat(const char *path)
{
char *f;
FILE *fp;
if (!(fp = fopen(path, "r"))) {
warn("fopen '%s':", path);
return NULL;
}
f = fgets(buf, sizeof(buf) - 1, fp);
if (fclose(fp) < 0) {
warn("fclose '%s':", path);
return NULL;
}
if (!f)
return NULL;
if ((f = strrchr(buf, '\n')))
f[0] = '\0';
return buf[0] ? buf : NULL;
}

@ -18,6 +18,7 @@ static const char unknown_str[] = "n/a";
* NULL on OpenBSD/FreeBSD
* battery_remaining battery remaining HH:MM battery name (BAT0)
* NULL on OpenBSD/FreeBSD
* cat read arbitrary file path
* cpu_perc cpu usage in percent NULL
* cpu_freq cpu frequency in MHz NULL
* datetime date and time format string (%F %T)

@ -5,6 +5,9 @@ const char *battery_perc(const char *);
const char *battery_state(const char *);
const char *battery_remaining(const char *);
/* cat */
const char *cat(const char *path);
/* cpu */
const char *cpu_freq(const char *unused);
const char *cpu_perc(const char *unused);

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