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grubby/SOURCES/0031-Add-index-constant-def...

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From 624a75f2d01d986ec78f60319ebc2acd37faada2 Mon Sep 17 00:00:00 2001
From: Robert Marshall <rmarshall@redhat.com>
Date: Tue, 13 Dec 2016 14:36:31 -0500
Subject: [PATCH 31/55] Add index constant definitions instead of open-coded
values.
Added numeric constants NO_DEFAULT_ENTRY and FIRST_ENTRY_INDEX. This
clarifies the intent of various assignment operations throughout the
source file.
Related: rhbz#1285601
---
grubby.c | 44 ++++++++++++++++++++++++--------------------
1 file changed, 24 insertions(+), 20 deletions(-)
diff --git a/grubby.c b/grubby.c
index 9af8d17b345..a717c18999b 100644
--- a/grubby.c
+++ b/grubby.c
@@ -132,6 +132,10 @@ struct singleEntry {
#define NEED_DEVTREE (1 << 6)
#define MAIN_DEFAULT (1 << 0)
+#define FIRST_ENTRY_INDEX 0 /* boot entry index value begin and increment
+ from this initial value */
+#define NO_DEFAULT_ENTRY -1 /* indicates that no specific default boot
+ entry was set or currently exists */
#define DEFAULT_SAVED -2
#define DEFAULT_SAVED_GRUB2 -3
@@ -1612,7 +1616,7 @@ static struct grubConfig *readConfig(const char *inName,
*end == ' ' || *end == '\t'))
end++;
if (*end)
- cfg->defaultImage = -1;
+ cfg->defaultImage = NO_DEFAULT_ENTRY;
} else if (defaultLine->numElements == 3) {
char *value = defaultLine->elements[2].item;
while (*value && (*value == '"' ||
@@ -1625,7 +1629,7 @@ static struct grubConfig *readConfig(const char *inName,
*end == ' ' || *end == '\t'))
end++;
if (*end)
- cfg->defaultImage = -1;
+ cfg->defaultImage = NO_DEFAULT_ENTRY;
}
} else if (cfi->defaultSupportSaved &&
!strncmp(defaultLine->elements[1].item, "saved",
@@ -1635,7 +1639,7 @@ static struct grubConfig *readConfig(const char *inName,
cfg->defaultImage =
strtol(defaultLine->elements[1].item, &end, 10);
if (*end)
- cfg->defaultImage = -1;
+ cfg->defaultImage = NO_DEFAULT_ENTRY;
} else if (defaultLine->numElements >= 2) {
int i = 0;
while ((entry = findEntryByIndex(cfg, i))) {
@@ -1663,7 +1667,7 @@ static struct grubConfig *readConfig(const char *inName,
if (entry) {
cfg->defaultImage = i;
} else {
- cfg->defaultImage = -1;
+ cfg->defaultImage = NO_DEFAULT_ENTRY;
}
}
} else if (cfg->cfi->defaultIsSaved && cfg->cfi->getEnv) {
@@ -1680,7 +1684,7 @@ static struct grubConfig *readConfig(const char *inName,
cfg->defaultImage = index;
}
} else {
- cfg->defaultImage = 0;
+ cfg->defaultImage = FIRST_ENTRY_INDEX;
}
return cfg;
@@ -1700,7 +1704,7 @@ static void writeDefault(FILE * out, char *indent,
fprintf(out, "%sdefault%ssaved\n", indent, separator);
else if (cfg->cfi->defaultIsSaved) {
fprintf(out, "%sset default=\"${saved_entry}\"\n", indent);
- if (cfg->defaultImage >= 0 && cfg->cfi->setEnv) {
+ if (cfg->defaultImage >= FIRST_ENTRY_INDEX && cfg->cfi->setEnv) {
char *title;
entry = findEntryByIndex(cfg, cfg->defaultImage);
line = getLineByType(LT_MENUENTRY, entry->lines);
@@ -1713,7 +1717,7 @@ static void writeDefault(FILE * out, char *indent,
"saved_entry", title);
}
}
- } else if (cfg->defaultImage > -1) {
+ } else if (cfg->defaultImage >= FIRST_ENTRY_INDEX) {
if (cfg->cfi->defaultIsIndex) {
if (cfg->cfi->defaultIsVariable) {
fprintf(out, "%sset default=\"%d\"\n", indent,
@@ -2417,7 +2421,7 @@ struct singleEntry *findTemplate(struct grubConfig *cfg, const char *prefix,
}
}
}
- } else if (cfg->defaultImage > -1) {
+ } else if (cfg->defaultImage >= FIRST_ENTRY_INDEX) {
entry = findEntryByIndex(cfg, cfg->defaultImage);
if (entry && suitableImage(entry, prefix, skipRemoved, flags)) {
if (indexPtr)
@@ -2499,20 +2503,20 @@ void setDefaultImage(struct grubConfig *config, int isUserSpecifiedKernelPath,
int i, j;
if (newBootEntryIsDefault) {
- config->defaultImage = 0;
+ config->defaultImage = FIRST_ENTRY_INDEX;
return;
} else if ((newDefaultBootEntryIndex >= 0) && config->cfi->defaultIsIndex) {
if (findEntryByIndex(config, newDefaultBootEntryIndex))
config->defaultImage = newDefaultBootEntryIndex;
else
- config->defaultImage = -1;
+ config->defaultImage = NO_DEFAULT_ENTRY;
return;
} else if (defaultKernelPath) {
i = 0;
if (findEntryByPath(config, defaultKernelPath, prefix, &i)) {
config->defaultImage = i;
} else {
- config->defaultImage = -1;
+ config->defaultImage = NO_DEFAULT_ENTRY;
return;
}
}
@@ -2524,7 +2528,7 @@ void setDefaultImage(struct grubConfig *config, int isUserSpecifiedKernelPath,
/* default is set to saved, we don't want to change it */
return;
- if (config->defaultImage > -1)
+ if (config->defaultImage >= FIRST_ENTRY_INDEX)
entry = findEntryByIndex(config, config->defaultImage);
else
entry = NULL;
@@ -2541,7 +2545,7 @@ void setDefaultImage(struct grubConfig *config, int isUserSpecifiedKernelPath,
config->defaultImage--;
}
} else if (isUserSpecifiedKernelPath) {
- config->defaultImage = 0;
+ config->defaultImage = FIRST_ENTRY_INDEX;
} else {
/* Either we just erased the default (or the default line was
* bad to begin with) and didn't put a new one in. We'll use
@@ -2550,7 +2554,7 @@ void setDefaultImage(struct grubConfig *config, int isUserSpecifiedKernelPath,
findTemplate(config, prefix, &config->defaultImage, 1,
flags);
if (!newDefault)
- config->defaultImage = -1;
+ config->defaultImage = NO_DEFAULT_ENTRY;
}
}
@@ -5175,11 +5179,11 @@ int main(int argc, const char **argv)
struct singleEntry *entry;
char *rootspec;
- if (config->defaultImage == -1)
+ if (config->defaultImage == NO_DEFAULT_ENTRY)
return 0;
if (config->defaultImage == DEFAULT_SAVED_GRUB2 &&
cfi->defaultIsSaved)
- config->defaultImage = 0;
+ config->defaultImage = FIRST_ENTRY_INDEX;
entry = findEntryByIndex(config, config->defaultImage);
if (!entry)
return 0;
@@ -5202,11 +5206,11 @@ int main(int argc, const char **argv)
struct singleLine *line;
struct singleEntry *entry;
- if (config->defaultImage == -1)
+ if (config->defaultImage == NO_DEFAULT_ENTRY)
return 0;
if (config->defaultImage == DEFAULT_SAVED_GRUB2 &&
cfi->defaultIsSaved)
- config->defaultImage = 0;
+ config->defaultImage = FIRST_ENTRY_INDEX;
entry = findEntryByIndex(config, config->defaultImage);
if (!entry)
return 0;
@@ -5236,11 +5240,11 @@ int main(int argc, const char **argv)
return 0;
} else if (displayDefaultIndex) {
- if (config->defaultImage == -1)
+ if (config->defaultImage == NO_DEFAULT_ENTRY)
return 0;
if (config->defaultImage == DEFAULT_SAVED_GRUB2 &&
cfi->defaultIsSaved)
- config->defaultImage = 0;
+ config->defaultImage = FIRST_ENTRY_INDEX;
printf("%i\n", config->defaultImage);
return 0;
--
2.17.1
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