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use buffered io to reduce syscalls

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NRK 2024-05-10 08:32:36 +00:00
parent 55137600e0
commit 78b9677abd
1 changed files with 26 additions and 20 deletions
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46
src/nnn.c
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@ -5057,12 +5057,12 @@ static void lock_terminal(void)
spawn(xgetenv("NNN_LOCKER", utils[UTIL_LOCKER]), NULL, NULL, NULL, F_CLI); spawn(xgetenv("NNN_LOCKER", utils[UTIL_LOCKER]), NULL, NULL, NULL, F_CLI);
} }
static void printkv(kv *kvarr, int fd, uchar_t max, uchar_t id) static void printkv(kv *kvarr, FILE *f, uchar_t max, uchar_t id)
{ {
char *val = (id == NNN_BMS) ? bmstr : pluginstr; char *val = (id == NNN_BMS) ? bmstr : pluginstr;
for (uchar_t i = 0; i < max && kvarr[i].key; ++i) for (uchar_t i = 0; i < max && kvarr[i].key; ++i)
dprintf(fd, " %c: %s\n", (char)kvarr[i].key, val + kvarr[i].off); fprintf(f, " %c: %s\n", (char)kvarr[i].key, val + kvarr[i].off);
} }
static void printkeys(kv *kvarr, char *buf, uchar_t max) static void printkeys(kv *kvarr, char *buf, uchar_t max)
@ -5191,6 +5191,12 @@ static void show_help(const char *path)
int fd = create_tmp_file(); int fd = create_tmp_file();
if (fd == -1) if (fd == -1)
return; return;
FILE *f = fdopen(fd, "wb");
if (f == NULL) {
close(fd);
unlink(g_tmpfpath);
return;
}
char *prog = xgetenv(env_cfg[NNN_HELP], NULL); char *prog = xgetenv(env_cfg[NNN_HELP], NULL);
if (prog) if (prog)
@ -5202,50 +5208,50 @@ static void show_help(const char *path)
for (const char *s = helpstr; s < end; ++s) { for (const char *s = helpstr; s < end; ++s) {
if (hex) { if (hex) {
for (int k = 0, n = xchartohex(*s); k < n; ++k) for (int k = 0, n = xchartohex(*s); k < n; ++k)
dprintf(fd, " "); fputc(' ', f);
} else if (*s == '%') { } else if (*s == '%') {
int n = ((s[1] - '0') * 10) + (s[2] - '0'); int n = ((s[1] - '0') * 10) + (s[2] - '0');
for (int k = 0; k < n; ++k) for (int k = 0; k < n; ++k)
dprintf(fd, " "); fputc(' ', f);
s += 2; s += 2;
} else { } else {
dprintf(fd, "%c", *s); fputc(*s, f);
} }
hex = (*s == '\n'); hex = (*s == '\n');
} }
dprintf(fd, "\nLOCATIONS\n"); fprintf(f, "\nLOCATIONS\n");
for (uchar_t i = 0; i < CTX_MAX; ++i) for (uchar_t i = 0; i < CTX_MAX; ++i)
if (g_ctx[i].c_cfg.ctxactive) if (g_ctx[i].c_cfg.ctxactive)
dprintf(fd, " %u: %s\n", i + 1, g_ctx[i].c_path); fprintf(f, " %u: %s\n", i + 1, g_ctx[i].c_path);
dprintf(fd, "\nVOLUME: avail:%s ", coolsize(get_fs_info(path, VFS_AVAIL))); fprintf(f, "\nVOLUME: avail:%s ", coolsize(get_fs_info(path, VFS_AVAIL)));
dprintf(fd, "used:%s ", coolsize(get_fs_info(path, VFS_USED))); fprintf(f, "used:%s ", coolsize(get_fs_info(path, VFS_USED)));
dprintf(fd, "size:%s\n\n", coolsize(get_fs_info(path, VFS_SIZE))); fprintf(f, "size:%s\n\n", coolsize(get_fs_info(path, VFS_SIZE)));
if (bookmark) { if (bookmark) {
dprintf(fd, "BOOKMARKS\n"); fprintf(f, "BOOKMARKS\n");
printkv(bookmark, fd, maxbm, NNN_BMS); printkv(bookmark, f, maxbm, NNN_BMS);
dprintf(fd, "\n"); fprintf(f, "\n");
} }
if (plug) { if (plug) {
dprintf(fd, "PLUGIN KEYS\n"); fprintf(f, "PLUGIN KEYS\n");
printkv(plug, fd, maxplug, NNN_PLUG); printkv(plug, f, maxplug, NNN_PLUG);
dprintf(fd, "\n"); fprintf(f, "\n");
} }
for (uchar_t i = NNN_OPENER; i <= NNN_TRASH; ++i) { for (uchar_t i = NNN_OPENER; i <= NNN_TRASH; ++i) {
char *s = getenv(env_cfg[i]); char *s = getenv(env_cfg[i]);
if (s) if (s)
dprintf(fd, "%s: %s\n", env_cfg[i], s); fprintf(f, "%s: %s\n", env_cfg[i], s);
} }
if (selpath) if (selpath)
dprintf(fd, "SELECTION FILE: %s\n", selpath); fprintf(f, "SELECTION FILE: %s\n", selpath);
dprintf(fd, "\nv%s\n%s\n", VERSION, GENERAL_INFO); fprintf(f, "\nv%s\n%s\n", VERSION, GENERAL_INFO);
close(fd); fclose(f); // also closes fd
spawn(pager, g_tmpfpath, NULL, NULL, F_CLI | F_TTY); spawn(pager, g_tmpfpath, NULL, NULL, F_CLI | F_TTY);
unlink(g_tmpfpath); unlink(g_tmpfpath);