* [PATCH] mapfile without HAVE_MMAP should not trim newlines
@ 2023-09-16 19:31 Bart Schaefer
2023-09-16 20:04 ` Bart Schaefer
0 siblings, 1 reply; 2+ messages in thread
From: Bart Schaefer @ 2023-09-16 19:31 UTC (permalink / raw)
To: Zsh hackers list
[-- Attachment #1: Type: text/plain, Size: 486 bytes --]
When memory mapping is not available, the mapfile module was using
readoutput() to slurp the file contents. This metafies the contents
(which is necessary for return as a parameter value) but has the
side-effect of dropping trailing newlines.
Src/input.c has another file-slurping function stuff() which has the
side-effect of loading the input buffer. This patch separates the
guts of stuff() into a separately-callable function and uses that in
mapfile.c to preserve the newlines.
[-- Attachment #2: mapfile-nl.txt --]
[-- Type: text/plain, Size: 2525 bytes --]
diff --git a/Src/Modules/mapfile.c b/Src/Modules/mapfile.c
index dd86fb596..84cdfea18 100644
--- a/Src/Modules/mapfile.c
+++ b/Src/Modules/mapfile.c
@@ -170,6 +170,8 @@ get_contents(char *fname)
#ifdef USE_MMAP
caddr_t mmptr;
struct stat sbuf;
+#else
+ off_t size;
#endif
char *val;
unmetafy(fname = ztrdup(fname), &fd);
@@ -196,12 +198,8 @@ get_contents(char *fname)
close(fd);
#else /* don't USE_MMAP */
val = NULL;
- if ((fd = open(fname, O_RDONLY | O_NOCTTY)) >= 0) {
- LinkList ll;
-
- if ((ll = readoutput(fd, 1, 0)))
- val = peekfirst(ll);
- }
+ if ((size = zstuff(&val, fname)) > 0)
+ val = metafy(val, size, META_HEAPDUP);
#endif /* USE_MMAP */
free(fname);
return val;
diff --git a/Src/input.c b/Src/input.c
index 4ed8f2ff2..8d7f44d7c 100644
--- a/Src/input.c
+++ b/Src/input.c
@@ -613,8 +613,8 @@ inungetc(int c)
/* stuff a whole file into memory and return it */
/**/
-char *
-ztuff(const char *fn)
+off_t
+zstuff(char **out, const char *fn)
{
FILE *in;
char *buf;
@@ -622,20 +622,36 @@ ztuff(const char *fn)
if (!(in = fopen(unmeta(fn), "r"))) {
zerr("can't open %s", fn);
- return NULL;
+ return -1;
}
+ queue_signals();
fseek(in, 0, SEEK_END);
len = ftell(in);
fseek(in, 0, SEEK_SET);
buf = (char *)zalloc(len + 1);
- if (!(fread(buf, len, 1, in))) {
+ if (len && !(fread(buf, len, 1, in))) {
zerr("read error on %s", fn);
fclose(in);
- return NULL;
+ unqueue_signals();
+ return -1;
}
fclose(in);
buf[len] = '\0';
- return buf;
+ *out = buf;
+ unqueue_signals();
+ return len;
+}
+
+/**/
+char *
+ztuff(const char *fn)
+{
+ char *buf;
+ off_t len = zstuff(&buf, fn);
+ if (len > 0)
+ return buf;
+ else
+ return NULL;
}
/* stuff a whole file into the input queue and print it */
@@ -644,26 +660,12 @@ ztuff(const char *fn)
int
stuff(char *fn)
{
- FILE *in;
char *buf;
- off_t len;
+ off_t len = zstuff(&buf, fn);
- if (!(in = fopen(unmeta(fn), "r"))) {
- zerr("can't open %s", fn);
+ if (len < 0)
return 1;
- }
- fseek(in, 0, SEEK_END);
- len = ftell(in);
- fseek(in, 0, SEEK_SET);
- buf = (char *)zalloc(len + 1);
- if (!(fread(buf, len, 1, in))) {
- zerr("read error on %s", fn);
- fclose(in);
- zfree(buf, len + 1);
- return 1;
- }
- fclose(in);
- buf[len] = '\0';
+
fwrite(buf, len, 1, stderr);
fflush(stderr);
inputsetline(metafy(buf, len, META_REALLOC), INP_FREE);
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] mapfile without HAVE_MMAP should not trim newlines
2023-09-16 19:31 [PATCH] mapfile without HAVE_MMAP should not trim newlines Bart Schaefer
@ 2023-09-16 20:04 ` Bart Schaefer
0 siblings, 0 replies; 2+ messages in thread
From: Bart Schaefer @ 2023-09-16 20:04 UTC (permalink / raw)
To: Zsh hackers list
[-- Attachment #1: Type: text/plain, Size: 64 bytes --]
Dangit, diff'd that against the wrong branch. Corrected patch.
[-- Attachment #2: mapfile-nl.txt --]
[-- Type: text/plain, Size: 2157 bytes --]
diff --git a/Src/Modules/mapfile.c b/Src/Modules/mapfile.c
index dd86fb596..84cdfea18 100644
--- a/Src/Modules/mapfile.c
+++ b/Src/Modules/mapfile.c
@@ -170,6 +170,8 @@ get_contents(char *fname)
#ifdef USE_MMAP
caddr_t mmptr;
struct stat sbuf;
+#else
+ off_t size;
#endif
char *val;
unmetafy(fname = ztrdup(fname), &fd);
@@ -196,12 +198,8 @@ get_contents(char *fname)
close(fd);
#else /* don't USE_MMAP */
val = NULL;
- if ((fd = open(fname, O_RDONLY | O_NOCTTY)) >= 0) {
- LinkList ll;
-
- if ((ll = readoutput(fd, 1, 0)))
- val = peekfirst(ll);
- }
+ if ((size = zstuff(&val, fname)) > 0)
+ val = metafy(val, size, META_HEAPDUP);
#endif /* USE_MMAP */
free(fname);
return val;
diff --git a/Src/input.c b/Src/input.c
index 0da065e51..8d7f44d7c 100644
--- a/Src/input.c
+++ b/Src/input.c
@@ -610,11 +610,11 @@ inungetc(int c)
}
}
-/* stuff a whole file into the input queue and print it */
+/* stuff a whole file into memory and return it */
/**/
-int
-stuff(char *fn)
+off_t
+zstuff(char **out, const char *fn)
{
FILE *in;
char *buf;
@@ -622,20 +622,50 @@ stuff(char *fn)
if (!(in = fopen(unmeta(fn), "r"))) {
zerr("can't open %s", fn);
- return 1;
+ return -1;
}
+ queue_signals();
fseek(in, 0, SEEK_END);
len = ftell(in);
fseek(in, 0, SEEK_SET);
buf = (char *)zalloc(len + 1);
- if (!(fread(buf, len, 1, in))) {
+ if (len && !(fread(buf, len, 1, in))) {
zerr("read error on %s", fn);
fclose(in);
- zfree(buf, len + 1);
- return 1;
+ unqueue_signals();
+ return -1;
}
fclose(in);
buf[len] = '\0';
+ *out = buf;
+ unqueue_signals();
+ return len;
+}
+
+/**/
+char *
+ztuff(const char *fn)
+{
+ char *buf;
+ off_t len = zstuff(&buf, fn);
+ if (len > 0)
+ return buf;
+ else
+ return NULL;
+}
+
+/* stuff a whole file into the input queue and print it */
+
+/**/
+int
+stuff(char *fn)
+{
+ char *buf;
+ off_t len = zstuff(&buf, fn);
+
+ if (len < 0)
+ return 1;
+
fwrite(buf, len, 1, stderr);
fflush(stderr);
inputsetline(metafy(buf, len, META_REALLOC), INP_FREE);
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2023-09-16 20:05 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-09-16 19:31 [PATCH] mapfile without HAVE_MMAP should not trim newlines Bart Schaefer
2023-09-16 20:04 ` Bart Schaefer
Code repositories for project(s) associated with this public inbox
https://git.vuxu.org/mirror/zsh/
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).