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Diffstat (limited to 'inotail.c')
-rw-r--r--inotail.c54
1 files changed, 28 insertions, 26 deletions
diff --git a/inotail.c b/inotail.c
index 8561054..920d5a5 100644
--- a/inotail.c
+++ b/inotail.c
@@ -94,8 +94,8 @@ static void usage(const int status)
static inline void setup_file(struct file_struct *f)
{
f->fd = f->i_watch = -1;
- f->st_size = 0;
- f->st_blksize = DEFAULT_BUFFER_SIZE;
+ f->size = 0;
+ f->blksize = DEFAULT_BUFFER_SIZE;
f->ignore = 0;
}
@@ -119,8 +119,10 @@ static void write_header(char *filename)
static unsigned short first_file = 1;
static char *last = NULL;
- if (last != filename)
+ if (last != filename) {
fprintf(stdout, "%s==> %s <==\n", (first_file ? "" : "\n"), pretty_name(filename));
+ fflush(stdout); /* Make sure the header is printed before the content */
+ }
first_file = 0;
last = filename;
@@ -128,14 +130,14 @@ static void write_header(char *filename)
static off_t lines_to_offset_from_end(struct file_struct *f, unsigned long n_lines)
{
- off_t offset = f->st_size;
- char *buf = emalloc(f->st_blksize);
+ off_t offset = f->size;
+ char *buf = emalloc(f->blksize);
n_lines++; /* We also count the last \n */
while (offset > 0 && n_lines > 0) {
int i;
- ssize_t rc, block_size = f->st_blksize; /* Size of the current block we're reading */
+ ssize_t rc, block_size = f->blksize; /* Size of the current block we're reading */
if (offset < block_size)
block_size = offset;
@@ -180,11 +182,11 @@ static off_t lines_to_offset_from_begin(struct file_struct *f, unsigned long n_l
return 0;
n_lines--;
- buf = emalloc(f->st_blksize);
+ buf = emalloc(f->blksize);
- while (offset <= f->st_size && n_lines > 0) {
+ while (offset <= f->size && n_lines > 0) {
int i;
- ssize_t rc, block_size = f->st_blksize;
+ ssize_t rc, block_size = f->blksize;
if (lseek(f->fd, offset, SEEK_SET) == (off_t) -1) {
fprintf(stderr, "Error: Could not seek in file '%s' (%s)\n", f->name, strerror(errno));
@@ -232,8 +234,8 @@ static off_t bytes_to_offset(struct file_struct *f, unsigned long n_bytes)
if (from_begin) {
if (n_bytes > 0)
offset = (off_t) n_bytes - 1;
- } else if ((off_t) n_bytes < f->st_size)
- offset = f->st_size - (off_t) n_bytes;
+ } else if ((off_t) n_bytes < f->size)
+ offset = f->size - (off_t) n_bytes;
return offset;
}
@@ -241,13 +243,13 @@ static off_t bytes_to_offset(struct file_struct *f, unsigned long n_bytes)
static ssize_t tail_pipe(struct file_struct *f)
{
ssize_t rc;
- char *buf = emalloc(f->st_blksize);
+ char *buf = emalloc(f->blksize);
if (verbose)
write_header(f->name);
/* We will just tail everything here */
- while ((rc = read(f->fd, buf, f->st_blksize)) > 0) {
+ while ((rc = read(f->fd, buf, f->blksize)) > 0) {
if (write(STDOUT_FILENO, buf, (size_t) rc) <= 0) {
/* e.g. when writing to a pipe which gets closed */
fprintf(stderr, "Error: Could not write to stdout (%s)\n", strerror(errno));
@@ -285,7 +287,7 @@ static int tail_file(struct file_struct *f, unsigned long n_units, char mode, ch
}
if (!IS_TAILABLE(finfo.st_mode)) {
- fprintf(stderr, "Error: '%s' of unsupported file type\n", f->name);
+ fprintf(stderr, "Error: '%s' of unsupported file type (%s)\n", f->name, strerror(errno));
ignore_file(f);
return -1;
}
@@ -294,8 +296,8 @@ static int tail_file(struct file_struct *f, unsigned long n_units, char mode, ch
if (IS_PIPELIKE(finfo.st_mode) || f->fd == STDIN_FILENO)
return tail_pipe(f);
- f->st_size = finfo.st_size;
- f->st_blksize = finfo.st_blksize; /* TODO: Can this value be 0? */
+ f->size = finfo.st_size;
+ f->blksize = finfo.st_blksize; /* TODO: Can this value be 0? */
if (mode == M_LINES)
offset = lines_to_offset(f, n_units);
@@ -316,9 +318,9 @@ static int tail_file(struct file_struct *f, unsigned long n_units, char mode, ch
return -1;
}
- buf = emalloc(f->st_blksize);
+ buf = emalloc(f->blksize);
- while ((bytes_read = read(f->fd, buf, f->st_blksize)) > 0)
+ while ((bytes_read = read(f->fd, buf, f->blksize)) > 0)
write(STDOUT_FILENO, buf, (size_t) bytes_read);
if (!forever) {
@@ -335,35 +337,36 @@ static int tail_file(struct file_struct *f, unsigned long n_units, char mode, ch
static int handle_inotify_event(struct inotify_event *inev, struct file_struct *f)
{
- char *fbuf;
int ret = 0;
if (inev->mask & IN_MODIFY) {
+ char *fbuf;
ssize_t rc;
struct stat finfo;
- fbuf = emalloc(f->st_blksize);
-
if (verbose)
write_header(f->name);
/* Seek to old file size */
- if (lseek(f->fd, f->st_size, SEEK_SET) == (off_t) -1) {
+ if (lseek(f->fd, f->size, SEEK_SET) == (off_t) -1) {
fprintf(stderr, "Error: Could not seek in file '%s' (%s)\n", f->name, strerror(errno));
ret = -1;
goto ignore;
}
- while ((rc = read(f->fd, fbuf, f->st_blksize)) != 0)
+ fbuf = emalloc(f->blksize);
+
+ while ((rc = read(f->fd, fbuf, f->blksize)) != 0)
write(STDOUT_FILENO, fbuf, (size_t) rc);
if (fstat(f->fd, &finfo) < 0) {
fprintf(stderr, "Error: Could not stat file '%s' (%s)\n", f->name, strerror(errno));
ret = -1;
+ free(fbuf);
goto ignore;
}
- f->st_size = finfo.st_size;
+ f->size = finfo.st_size;
free(fbuf);
return ret;
@@ -378,7 +381,6 @@ static int handle_inotify_event(struct inotify_event *inev, struct file_struct *
ignore:
ignore_file(f);
- free(fbuf);
return ret;
}
@@ -476,7 +478,7 @@ int main(int argc, char **argv)
optarg++;
if (!is_digit(*optarg)) {
- fprintf(stderr, "Invalid number of lines: %s\n", optarg);
+ fprintf(stderr, "Error: Invalid number of units: %s\n", optarg);
exit(EXIT_FAILURE);
}
n_units = strtoul(optarg, NULL, 0);
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-21 18:39:47 +0000