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abuild-gzsplit: use meaningful error messages

This commit is contained in:
Natanael Copa 2020-07-08 12:40:13 +02:00
parent fbc11ea271
commit 62913a287d
1 changed files with 26 additions and 7 deletions
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33
abuild-gzsplit.c
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@ -1,4 +1,5 @@
#include <stdio.h>
#include <err.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
@ -20,15 +21,23 @@ int main(void)
zs.next_out = (Bytef *)obuf;
while (1) {
const char *fn = NULL;
if (zs.avail_in == 0) {
zs.avail_in = read(STDIN_FILENO, ibuf, sizeof ibuf);
zs.next_in = (Bytef *)ibuf;
if (zs.avail_in < 0) goto err;
if (zs.avail_in < 0) {
warn("Failed to read input");
goto err;
}
if (zs.avail_in == 0 && r == Z_STREAM_END) goto ok;
}
r = inflate(&zs, Z_NO_FLUSH);
if (r != Z_OK && r != Z_STREAM_END) goto err;
if (r != Z_OK && r != Z_STREAM_END) {
warnx("Failed to inflate input");
goto err;
}
len = sizeof obuf - zs.avail_out;
if (len) {
@ -46,10 +55,15 @@ int main(void)
fn = "control.tar.gz";
else if (rc == 1)
fn = "data.tar.gz", rc = 2;
else
else {
warnx("Failed to find .PKGINFO section");
goto err;
}
fd = open(fn, O_CREAT|O_TRUNC|O_WRONLY, 0777);
if (fd < 0) goto err;
if (fd < 0) {
warn("Failed to open %s", fn);
goto err;
}
}
zs.next_out = (Bytef *)obuf;
zs.avail_out = sizeof obuf;
@ -57,7 +71,10 @@ int main(void)
if (zs.avail_in == 0 || r == Z_STREAM_END) {
len = (void *)zs.next_in - (void *)ibuf;
if (write(fd, ibuf, len) != len) goto err;
if (write(fd, ibuf, len) != len) {
warn("Failed to write to %s", fn);
goto err;
}
memmove(ibuf, zs.next_in, zs.avail_in);
zs.next_in = (Bytef *)ibuf;
}
@ -68,7 +85,10 @@ int main(void)
fd = -1;
}
inflateEnd(&zs);
if (inflateInit2(&zs, 15+32) != Z_OK) goto err;
if (inflateInit2(&zs, 15+32) != Z_OK) {
warnx("inflateInit2 failed");
goto err;
}
}
}
ok:
@ -76,7 +96,6 @@ ok:
err:
if (fd >= 0) close(fd);
inflateEnd(&zs);
if (rc) fprintf(stderr, "failed\n");
return rc;
}