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-rw-r--r--Makefile.am1
-rw-r--r--i3status.c19
-rw-r--r--include/i3status.h1
-rw-r--r--man/i3status.man24
-rw-r--r--src/print_file_contents.c73
-rw-r--r--testcases/025-file-contents/expected_output.txt1
-rw-r--r--testcases/025-file-contents/i3status.conf14
-rw-r--r--testcases/025-file-contents/short.txt1
8 files changed, 134 insertions, 0 deletions
diff --git a/Makefile.am b/Makefile.am
index 7d8b5a9..bb251f0 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -67,6 +67,7 @@ i3status_SOURCES = \
src/print_time.c \
src/print_volume.c \
src/print_wireless_info.c \
+ src/print_file_contents.c \
src/process_runs.c \
src/pulse.c
diff --git a/i3status.c b/i3status.c
index 90660bb..0898da3 100644
--- a/i3status.c
+++ b/i3status.c
@@ -491,6 +491,18 @@ int main(int argc, char *argv[]) {
CFG_CUSTOM_SEP_BLOCK_WIDTH_OPT,
CFG_END()};
+ cfg_opt_t read_opts[] = {
+ CFG_STR("format", "%content", CFGF_NONE),
+ CFG_STR("format_bad", "%title - %errno: %error", CFGF_NONE),
+ CFG_STR("path", NULL, CFGF_NONE),
+ CFG_INT("max_characters", 255, CFGF_NONE),
+ CFG_CUSTOM_ALIGN_OPT,
+ CFG_CUSTOM_COLOR_OPTS,
+ CFG_CUSTOM_MIN_WIDTH_OPT,
+ CFG_CUSTOM_SEPARATOR_OPT,
+ CFG_CUSTOM_SEP_BLOCK_WIDTH_OPT,
+ CFG_END()};
+
cfg_opt_t opts[] = {
CFG_STR_LIST("order", "{}", CFGF_NONE),
CFG_SEC("general", general_opts, CFGF_NONE),
@@ -509,6 +521,7 @@ int main(int argc, char *argv[]) {
CFG_SEC("load", load_opts, CFGF_NONE),
CFG_SEC("memory", memory_opts, CFGF_NONE),
CFG_SEC("cpu_usage", usage_opts, CFGF_NONE),
+ CFG_SEC("read_file", read_opts, CFGF_TITLE | CFGF_MULTI),
CFG_END()};
char *configfile = NULL;
@@ -787,6 +800,12 @@ int main(int argc, char *argv[]) {
print_cpu_usage(json_gen, buffer, cfg_getstr(sec, "format"), cfg_getstr(sec, "format_above_threshold"), cfg_getstr(sec, "format_above_degraded_threshold"), cfg_getstr(sec, "path"), cfg_getfloat(sec, "max_threshold"), cfg_getfloat(sec, "degraded_threshold"));
SEC_CLOSE_MAP;
}
+
+ CASE_SEC_TITLE("read_file") {
+ SEC_OPEN_MAP("read_file");
+ print_file_contents(json_gen, buffer, title, cfg_getstr(sec, "path"), cfg_getstr(sec, "format"), cfg_getstr(sec, "format_bad"), cfg_getint(sec, "max_characters"));
+ SEC_CLOSE_MAP;
+ }
}
if (output_format == O_I3BAR) {
yajl_gen_array_close(json_gen);
diff --git a/include/i3status.h b/include/i3status.h
index f3a8941..217376a 100644
--- a/include/i3status.h
+++ b/include/i3status.h
@@ -231,6 +231,7 @@ bool process_runs(const char *path);
int volume_pulseaudio(uint32_t sink_idx, const char *sink_name);
bool description_pulseaudio(uint32_t sink_idx, const char *sink_name, char buffer[MAX_SINK_DESCRIPTION_LEN]);
bool pulse_initialize(void);
+void print_file_contents(yajl_gen json_gen, char *buffer, const char *title, const char *path, const char *format, const char *format_bad, const int max_chars);
/* socket file descriptor for general purposes */
extern int general_socket;
diff --git a/man/i3status.man b/man/i3status.man
index 4bc7d0a..70ba71a 100644
--- a/man/i3status.man
+++ b/man/i3status.man
@@ -123,6 +123,11 @@ memory {
disk "/" {
format = "%free"
}
+
+read_file uptime {
+ path = "/proc/uptime"
+}
+
-------------------------------------------------------------
=== General
@@ -611,6 +616,25 @@ volume master {
}
-------------------------------------------------------------
+=== File Contents
+
+Outputs the contents of the specified file. You can use this to check contents
+of files on your system, for example /proc/uptime. By default the function only
+reads the first 254 characters of the file, if you want to override this set
+the Max_characters option. It will never read beyond the first 4095 characters.
+If the file is not found "no file" will be printed, if the file can't be read
+"error read" will be printed.
+
+*Example order*: read_file UPTIME
+
+*Example format*: "%title: %content"
+
+*Example format_bad*: "%title - %errno: %error"
+
+*Example path*: "/proc/uptime"
+
+*Example Max_characters*: 255
+
== Universal module options
When using the i3bar output format, there are a few additional options that
diff --git a/src/print_file_contents.c b/src/print_file_contents.c
new file mode 100644
index 0000000..afbe3e3
--- /dev/null
+++ b/src/print_file_contents.c
@@ -0,0 +1,73 @@
+// vim:ts=4:sw=4:expandtab
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <yajl/yajl_gen.h>
+#include <yajl/yajl_version.h>
+#include <sys/types.h>
+
+#include <sys/fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include "i3status.h"
+
+static void *scalloc(size_t size) {
+ void *result = calloc(size, 1);
+ if (result == NULL) {
+ die("Error: out of memory (calloc(%zu))\n", size);
+ }
+ return result;
+}
+
+void print_file_contents(yajl_gen json_gen, char *buffer, const char *title, const char *path, const char *format, const char *format_bad, const int max_chars) {
+ const char *walk = format;
+ char *outwalk = buffer;
+ char *buf = scalloc(max_chars * sizeof(char));
+
+ int n = -1;
+ int fd = open(path, O_RDONLY);
+
+ INSTANCE(path);
+
+ if (fd > -1) {
+ n = read(fd, buf, max_chars);
+ if (n != -1) {
+ buf[n] = '\0';
+ }
+ (void)close(fd);
+ START_COLOR("color_good");
+ } else if (errno != 0) {
+ walk = format_bad;
+ START_COLOR("color_bad");
+ }
+
+ for (; *walk != '\0'; walk++) {
+ if (*walk != '%') {
+ *(outwalk++) = *walk;
+ } else if (BEGINS_WITH(walk + 1, "title")) {
+ outwalk += sprintf(outwalk, "%s", title);
+ walk += strlen("title");
+ } else if (BEGINS_WITH(walk + 1, "content")) {
+ for (char *s = buf; *s != '\0' && n > 0; s++, n--) {
+ if (*s != '\n') {
+ *(outwalk++) = *s;
+ }
+ }
+ walk += strlen("content");
+ } else if (BEGINS_WITH(walk + 1, "errno")) {
+ outwalk += sprintf(outwalk, "%d", errno);
+ walk += strlen("errno");
+ } else if (BEGINS_WITH(walk + 1, "error")) {
+ outwalk += sprintf(outwalk, "%s", strerror(errno));
+ walk += strlen("error");
+ } else {
+ *(outwalk++) = '%';
+ }
+ }
+
+ free(buf);
+
+ END_COLOR;
+ OUTPUT_FULL_TEXT(buffer);
+}
diff --git a/testcases/025-file-contents/expected_output.txt b/testcases/025-file-contents/expected_output.txt
new file mode 100644
index 0000000..5c56020
--- /dev/null
+++ b/testcases/025-file-contents/expected_output.txt
@@ -0,0 +1 @@
+contents | NONEXISTANT - 2: No such file or directory
diff --git a/testcases/025-file-contents/i3status.conf b/testcases/025-file-contents/i3status.conf
new file mode 100644
index 0000000..26646cd
--- /dev/null
+++ b/testcases/025-file-contents/i3status.conf
@@ -0,0 +1,14 @@
+general {
+ output_format = "none"
+}
+
+order += "read_file EXISTING"
+order += "read_file NONEXISTANT"
+
+read_file EXISTING {
+ path = "testcases/025-file-contents/short.txt"
+}
+
+read_file NONEXISTANT {
+ path = "testcases/025-file-contents/nonexistant"
+}
diff --git a/testcases/025-file-contents/short.txt b/testcases/025-file-contents/short.txt
new file mode 100644
index 0000000..12f00e9
--- /dev/null
+++ b/testcases/025-file-contents/short.txt
@@ -0,0 +1 @@
+contents
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-31 10:35:08 +0000